DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conflicts by palash-gandhi · Pull Request #31 · delphix/linux-kernel-generic

palash-gandhi · 2023-09-15T01:12:36Z

Problem

delphix/linux-kernel-aws#46 and it's side ports introduced a potential for merge conflicts in the base annotations file. If upstream changes that file, we are bound to hit a merge conflict when updating our repos because the include line is at the end of the file. Moving it to the top result in an unwanted configuration - where upstream's annotations overrides Delphix's annotations. We want Delphix's annotations to be processed at the very end.

Solution

delphix/linux-pkg#300 moves Delphix's custom annotations file into the linux-pkg repo. This change modifies the kernel repo to remove it.

Testing Done

See delphix/linux-pkg#300 for testing.

…licts PR URL: https://www.github.com/delphix/linux-kernel-generic/pull/31

…licts (#31) PR URL: https://www.github.com/delphix/linux-kernel-generic/pull/31

BugLink: https://bugs.launchpad.net/bugs/2060142 commit a7d6027 upstream. syzkaller reported an overflown write in arp_req_get(). [0] When ioctl(SIOCGARP) is issued, arp_req_get() looks up an neighbour entry and copies neigh->ha to struct arpreq.arp_ha.sa_data. The arp_ha here is struct sockaddr, not struct sockaddr_storage, so the sa_data buffer is just 14 bytes. In the splat below, 2 bytes are overflown to the next int field, arp_flags. We initialise the field just after the memcpy(), so it's not a problem. However, when dev->addr_len is greater than 22 (e.g. MAX_ADDR_LEN), arp_netmask is overwritten, which could be set as htonl(0xFFFFFFFFUL) in arp_ioctl() before calling arp_req_get(). To avoid the overflow, let's limit the max length of memcpy(). Note that commit b5f0de6 ("net: dev: Convert sa_data to flexible array in struct sockaddr") just silenced syzkaller. [0]: memcpy: detected field-spanning write (size 16) of single field "r->arp_ha.sa_data" at net/ipv4/arp.c:1128 (size 14) WARNING: CPU: 0 PID: 144638 at net/ipv4/arp.c:1128 arp_req_get+0x411/0x4a0 net/ipv4/arp.c:1128 Modules linked in: CPU: 0 PID: 144638 Comm: syz-executor.4 Not tainted 6.1.74 #31 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-5 04/01/2014 RIP: 0010:arp_req_get+0x411/0x4a0 net/ipv4/arp.c:1128 Code: fd ff ff e8 41 42 de fb b9 0e 00 00 00 4c 89 fe 48 c7 c2 20 6d ab 87 48 c7 c7 80 6d ab 87 c6 05 25 af 72 04 01 e8 5f 8d ad fb <0f> 0b e9 6c fd ff ff e8 13 42 de fb be 03 00 00 00 4c 89 e7 e8 a6 RSP: 0018:ffffc900050b7998 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff88803a815000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8641a44a RDI: 0000000000000001 RBP: ffffc900050b7a98 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 203a7970636d656d R12: ffff888039c54000 R13: 1ffff92000a16f37 R14: ffff88803a815084 R15: 0000000000000010 FS: 00007f172bf306c0(0000) GS:ffff88805aa00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f172b3569f0 CR3: 0000000057f12005 CR4: 0000000000770ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <TASK> arp_ioctl+0x33f/0x4b0 net/ipv4/arp.c:1261 inet_ioctl+0x314/0x3a0 net/ipv4/af_inet.c:981 sock_do_ioctl+0xdf/0x260 net/socket.c:1204 sock_ioctl+0x3ef/0x650 net/socket.c:1321 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x18e/0x220 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x37/0x90 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x64/0xce RIP: 0033:0x7f172b262b8d Code: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f172bf300b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f172b3abf80 RCX: 00007f172b262b8d RDX: 0000000020000000 RSI: 0000000000008954 RDI: 0000000000000003 RBP: 00007f172b2d3493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f172b3abf80 R15: 00007f172bf10000 </TASK> Reported-by: syzkaller <syzkaller@googlegroups.com> Reported-by: Bjoern Doebel <doebel@amazon.de> Fixes: 1da177e ("Linux-2.6.12-rc2") Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Link: https://lore.kernel.org/r/20240215230516.31330-1-kuniyu@amazon.com Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> CVE-2024-26733 Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com> Signed-off-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>

…licts (#31) PR URL: https://www.github.com/delphix/linux-kernel-generic/pull/31

BugLink: https://bugs.launchpad.net/bugs/2120812 [ Upstream commit eedf3e3 ] ACPICA commit 1c28da2242783579d59767617121035dafba18c3 This was originally done in NetBSD: NetBSD/src@b69d1ac and is the correct alternative to the smattering of `memcpy`s I previously contributed to this repository. This also sidesteps the newly strict checks added in UBSAN: llvm/llvm-project@7926744 Before this change we see the following UBSAN stack trace in Fuchsia: #0 0x000021afcfdeca5e in acpi_rs_get_address_common(struct acpi_resource*, union aml_resource*) ../../third_party/acpica/source/components/resources/rsaddr.c:329 <platform-bus-x86.so>+0x6aca5e #1.2 0x000021982bc4af3c in ubsan_get_stack_trace() compiler-rt/lib/ubsan/ubsan_diag.cpp:41 <libclang_rt.asan.so>+0x41f3c #1.1 0x000021982bc4af3c in maybe_print_stack_trace() compiler-rt/lib/ubsan/ubsan_diag.cpp:51 <libclang_rt.asan.so>+0x41f3c #1 0x000021982bc4af3c in ~scoped_report() compiler-rt/lib/ubsan/ubsan_diag.cpp:395 <libclang_rt.asan.so>+0x41f3c #2 0x000021982bc4bb6f in handletype_mismatch_impl() compiler-rt/lib/ubsan/ubsan_handlers.cpp:137 <libclang_rt.asan.so>+0x42b6f #3 0x000021982bc4b723 in __ubsan_handle_type_mismatch_v1 compiler-rt/lib/ubsan/ubsan_handlers.cpp:142 <libclang_rt.asan.so>+0x42723 #4 0x000021afcfdeca5e in acpi_rs_get_address_common(struct acpi_resource*, union aml_resource*) ../../third_party/acpica/source/components/resources/rsaddr.c:329 <platform-bus-x86.so>+0x6aca5e #5 0x000021afcfdf2089 in acpi_rs_convert_aml_to_resource(struct acpi_resource*, union aml_resource*, struct acpi_rsconvert_info*) ../../third_party/acpica/source/components/resources/rsmisc.c:355 <platform-bus-x86.so>+0x6b2089 #6 0x000021afcfded169 in acpi_rs_convert_aml_to_resources(u8*, u32, u32, u8, void**) ../../third_party/acpica/source/components/resources/rslist.c:137 <platform-bus-x86.so>+0x6ad169 #7 0x000021afcfe2d24a in acpi_ut_walk_aml_resources(struct acpi_walk_state*, u8*, acpi_size, acpi_walk_aml_callback, void**) ../../third_party/acpica/source/components/utilities/utresrc.c:237 <platform-bus-x86.so>+0x6ed24a #8 0x000021afcfde66b7 in acpi_rs_create_resource_list(union acpi_operand_object*, struct acpi_buffer*) ../../third_party/acpica/source/components/resources/rscreate.c:199 <platform-bus-x86.so>+0x6a66b7 #9 0x000021afcfdf6979 in acpi_rs_get_method_data(acpi_handle, const char*, struct acpi_buffer*) ../../third_party/acpica/source/components/resources/rsutils.c:770 <platform-bus-x86.so>+0x6b6979 #10 0x000021afcfdf708f in acpi_walk_resources(acpi_handle, char*, acpi_walk_resource_callback, void*) ../../third_party/acpica/source/components/resources/rsxface.c:731 <platform-bus-x86.so>+0x6b708f #11 0x000021afcfa95dcf in acpi::acpi_impl::walk_resources(acpi::acpi_impl*, acpi_handle, const char*, acpi::Acpi::resources_callable) ../../src/devices/board/lib/acpi/acpi-impl.cc:41 <platform-bus-x86.so>+0x355dcf #12 0x000021afcfaa8278 in acpi::device_builder::gather_resources(acpi::device_builder*, acpi::Acpi*, fidl::any_arena&, acpi::Manager*, acpi::device_builder::gather_resources_callback) ../../src/devices/board/lib/acpi/device-builder.cc:84 <platform-bus-x86.so>+0x368278 #13 0x000021afcfbddb87 in acpi::Manager::configure_discovered_devices(acpi::Manager*) ../../src/devices/board/lib/acpi/manager.cc:75 <platform-bus-x86.so>+0x49db87 #14 0x000021afcf99091d in publish_acpi_devices(acpi::Manager*, zx_device_t*, zx_device_t*) ../../src/devices/board/drivers/x86/acpi-nswalk.cc:95 <platform-bus-x86.so>+0x25091d #15 0x000021afcf9c1d4e in x86::X86::do_init(x86::X86*) ../../src/devices/board/drivers/x86/x86.cc:60 <platform-bus-x86.so>+0x281d4e #16 0x000021afcf9e33ad in λ(x86::X86::ddk_init::(anon class)*) ../../src/devices/board/drivers/x86/x86.cc:77 <platform-bus-x86.so>+0x2a33ad #17 0x000021afcf9e313e in fit::internal::target<(lambda at../../src/devices/board/drivers/x86/x86.cc:76:19), false, false, std::__2::allocator<std::byte>, void>::invoke(void*) ../../sdk/lib/fit/include/lib/fit/internal/function.h:183 <platform-bus-x86.so>+0x2a313e #18 0x000021afcfbab4c7 in fit::internal::function_base<16UL, false, void(), std::__2::allocator<std::byte>>::invoke(const fit::internal::function_base<16UL, false, void (), std::__2::allocator<std::byte> >*) ../../sdk/lib/fit/include/lib/fit/internal/function.h:522 <platform-bus-x86.so>+0x46b4c7 #19 0x000021afcfbab342 in fit::function_impl<16UL, false, void(), std::__2::allocator<std::byte>>::operator()(const fit::function_impl<16UL, false, void (), std::__2::allocator<std::byte> >*) ../../sdk/lib/fit/include/lib/fit/function.h:315 <platform-bus-x86.so>+0x46b342 #20 0x000021afcfcd98c3 in async::internal::retained_task::Handler(async_dispatcher_t*, async_task_t*, zx_status_t) ../../sdk/lib/async/task.cc:24 <platform-bus-x86.so>+0x5998c3 #21 0x00002290f9924616 in λ(const driver_runtime::Dispatcher::post_task::(anon class)*, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, zx_status_t) ../../src/devices/bin/driver_runtime/dispatcher.cc:789 <libdriver_runtime.so>+0x10a616 #22 0x00002290f9924323 in fit::internal::target<(lambda at../../src/devices/bin/driver_runtime/dispatcher.cc:788:7), true, false, std::__2::allocator<std::byte>, void, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request>>, int>::invoke(void*, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, int) ../../sdk/lib/fit/include/lib/fit/internal/function.h:128 <libdriver_runtime.so>+0x10a323 #23 0x00002290f9904b76 in fit::internal::function_base<24UL, true, void(std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request>>, int), std::__2::allocator<std::byte>>::invoke(const fit::internal::function_base<24UL, true, void (std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, int), std::__2::allocator<std::byte> >*, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, int) ../../sdk/lib/fit/include/lib/fit/internal/function.h:522 <libdriver_runtime.so>+0xeab76 #24 0x00002290f9904831 in fit::callback_impl<24UL, true, void(std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request>>, int), std::__2::allocator<std::byte>>::operator()(fit::callback_impl<24UL, true, void (std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, int), std::__2::allocator<std::byte> >*, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, int) ../../sdk/lib/fit/include/lib/fit/function.h:471 <libdriver_runtime.so>+0xea831 #25 0x00002290f98d5adc in driver_runtime::callback_request::Call(driver_runtime::callback_request*, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, zx_status_t) ../../src/devices/bin/driver_runtime/callback_request.h:74 <libdriver_runtime.so>+0xbbadc #26 0x00002290f98e1e58 in driver_runtime::Dispatcher::dispatch_callback(driver_runtime::Dispatcher*, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >) ../../src/devices/bin/driver_runtime/dispatcher.cc:1248 <libdriver_runtime.so>+0xc7e58 #27 0x00002290f98e4159 in driver_runtime::Dispatcher::dispatch_callbacks(driver_runtime::Dispatcher*, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>) ../../src/devices/bin/driver_runtime/dispatcher.cc:1308 <libdriver_runtime.so>+0xca159 #28 0x00002290f9918414 in λ(const driver_runtime::Dispatcher::create_with_adder::(anon class)*, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>) ../../src/devices/bin/driver_runtime/dispatcher.cc:353 <libdriver_runtime.so>+0xfe414 #29 0x00002290f991812d in fit::internal::target<(lambda at../../src/devices/bin/driver_runtime/dispatcher.cc:351:7), true, false, std::__2::allocator<std::byte>, void, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter>>, fbl::ref_ptr<driver_runtime::Dispatcher>>::invoke(void*, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>) ../../sdk/lib/fit/include/lib/fit/internal/function.h:128 <libdriver_runtime.so>+0xfe12d #30 0x00002290f9906fc7 in fit::internal::function_base<8UL, true, void(std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter>>, fbl::ref_ptr<driver_runtime::Dispatcher>), std::__2::allocator<std::byte>>::invoke(const fit::internal::function_base<8UL, true, void (std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>), std::__2::allocator<std::byte> >*, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>) ../../sdk/lib/fit/include/lib/fit/internal/function.h:522 <libdriver_runtime.so>+0xecfc7 #31 0x00002290f9906c66 in fit::function_impl<8UL, true, void(std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter>>, fbl::ref_ptr<driver_runtime::Dispatcher>), std::__2::allocator<std::byte>>::operator()(const fit::function_impl<8UL, true, void (std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>), std::__2::allocator<std::byte> >*, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>) ../../sdk/lib/fit/include/lib/fit/function.h:315 <libdriver_runtime.so>+0xecc66 #32 0x00002290f98e73d9 in driver_runtime::Dispatcher::event_waiter::invoke_callback(driver_runtime::Dispatcher::event_waiter*, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>) ../../src/devices/bin/driver_runtime/dispatcher.h:543 <libdriver_runtime.so>+0xcd3d9 #33 0x00002290f98e700d in driver_runtime::Dispatcher::event_waiter::handle_event(std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, async_dispatcher_t*, async::wait_base*, zx_status_t, zx_packet_signal_t const*) ../../src/devices/bin/driver_runtime/dispatcher.cc:1442 <libdriver_runtime.so>+0xcd00d #34 0x00002290f9918983 in async_loop_owned_event_handler<driver_runtime::Dispatcher::event_waiter>::handle_event(async_loop_owned_event_handler<driver_runtime::Dispatcher::event_waiter>*, async_dispatcher_t*, async::wait_base*, zx_status_t, zx_packet_signal_t const*) ../../src/devices/bin/driver_runtime/async_loop_owned_event_handler.h:59 <libdriver_runtime.so>+0xfe983 #35 0x00002290f9918b9e in async::wait_method<async_loop_owned_event_handler<driver_runtime::Dispatcher::event_waiter>, &async_loop_owned_event_handler<driver_runtime::Dispatcher::event_waiter>::handle_event>::call_handler(async_dispatcher_t*, async_wait_t*, zx_status_t, zx_packet_signal_t const*) ../../sdk/lib/async/include/lib/async/cpp/wait.h:201 <libdriver_runtime.so>+0xfeb9e #36 0x00002290f99bf509 in async_loop_dispatch_wait(async_loop_t*, async_wait_t*, zx_status_t, zx_packet_signal_t const*) ../../sdk/lib/async-loop/loop.c:394 <libdriver_runtime.so>+0x1a5509 #37 0x00002290f99b9958 in async_loop_run_once(async_loop_t*, zx_time_t) ../../sdk/lib/async-loop/loop.c:343 <libdriver_runtime.so>+0x19f958 #38 0x00002290f99b9247 in async_loop_run(async_loop_t*, zx_time_t, _Bool) ../../sdk/lib/async-loop/loop.c:301 <libdriver_runtime.so>+0x19f247 #39 0x00002290f99ba962 in async_loop_run_thread(void*) ../../sdk/lib/async-loop/loop.c:860 <libdriver_runtime.so>+0x1a0962 #40 0x000041afd176ef30 in start_c11(void*) ../../zircon/third_party/ulib/musl/pthread/pthread_create.c:63 <libc.so>+0x84f30 #41 0x000041afd18a448d in thread_trampoline(uintptr_t, uintptr_t) ../../zircon/system/ulib/runtime/thread.cc:100 <libc.so>+0x1ba48d Link: acpica/acpica@1c28da22 Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Link: https://patch.msgid.link/4664267.LvFx2qVVIh@rjwysocki.net Signed-off-by: Tamir Duberstein <tamird@gmail.com> [ rjw: Pick up the tag from Tamir ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Noah Wager <noah.wager@canonical.com> Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

…er dereference BugLink: https://bugs.launchpad.net/bugs/2126463 commit 1bb3363 upstream. A malicious HID device with quirk APPLE_MAGIC_BACKLIGHT can trigger a NULL pointer dereference whilst the power feature-report is toggled and sent to the device in apple_magic_backlight_report_set(). The power feature-report is expected to have two data fields, but if the descriptor declares one field then accessing field[1] and dereferencing it in apple_magic_backlight_report_set() becomes invalid since field[1] will be NULL. An example of a minimal descriptor which can cause the crash is something like the following where the report with ID 3 (power report) only references a single 1-byte field. When hid core parses the descriptor it will encounter the final feature tag, allocate a hid_report (all members of field[] will be zeroed out), create field structure and populate it, increasing the maxfield to 1. The subsequent field[1] access and dereference causes the crash. Usage Page (Vendor Defined 0xFF00) Usage (0x0F) Collection (Application) Report ID (1) Usage (0x01) Logical Minimum (0) Logical Maximum (255) Report Size (8) Report Count (1) Feature (Data,Var,Abs) Usage (0x02) Logical Maximum (32767) Report Size (16) Report Count (1) Feature (Data,Var,Abs) Report ID (3) Usage (0x03) Logical Minimum (0) Logical Maximum (1) Report Size (8) Report Count (1) Feature (Data,Var,Abs) End Collection Here we see the KASAN splat when the kernel dereferences the NULL pointer and crashes: [ 15.164723] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN NOPTI [ 15.165691] KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] [ 15.165691] CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Not tainted 6.15.0 #31 PREEMPT(voluntary) [ 15.165691] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 15.165691] RIP: 0010:apple_magic_backlight_report_set+0xbf/0x210 [ 15.165691] Call Trace: [ 15.165691] <TASK> [ 15.165691] apple_probe+0x571/0xa20 [ 15.165691] hid_device_probe+0x2e2/0x6f0 [ 15.165691] really_probe+0x1ca/0x5c0 [ 15.165691] __driver_probe_device+0x24f/0x310 [ 15.165691] driver_probe_device+0x4a/0xd0 [ 15.165691] __device_attach_driver+0x169/0x220 [ 15.165691] bus_for_each_drv+0x118/0x1b0 [ 15.165691] __device_attach+0x1d5/0x380 [ 15.165691] device_initial_probe+0x12/0x20 [ 15.165691] bus_probe_device+0x13d/0x180 [ 15.165691] device_add+0xd87/0x1510 [...] To fix this issue we should validate the number of fields that the backlight and power reports have and if they do not have the required number of fields then bail. Fixes: 394ba61 ("HID: apple: Add support for magic keyboard backlight on T2 Macs") Cc: stable@vger.kernel.org Signed-off-by: Qasim Ijaz <qasdev00@gmail.com> Reviewed-by: Orlando Chamberlain <orlandoch.dev@gmail.com> Tested-by: Aditya Garg <gargaditya08@live.com> Link: https://patch.msgid.link/20250713233008.15131-1-qasdev00@gmail.com Signed-off-by: Benjamin Tissoires <bentiss@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Noah Wager <noah.wager@canonical.com> Signed-off-by: Edoardo Canepa <edoardo.canepa@canonical.com>

The `proc-macro2` crate depends on the `unicode-ident` crate to determine whether characters have the XID_Start or XID_Continue properties according to Unicode Standard Annex #31. However, we only need ASCII identifiers in the kernel, thus we can simplify the check and remove completely that dependency. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Gary Guo <gary@garyguo.net> Tested-by: Gary Guo <gary@garyguo.net> Tested-by: Jesung Yang <y.j3ms.n@gmail.com> Link: https://patch.msgid.link/20251124151837.2184382-9-ojeda@kernel.org Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

The `syn` crate depends on the `unicode-ident` crate to determine whether characters have the XID_Start or XID_Continue properties according to Unicode Standard Annex #31. However, we only need ASCII identifiers in the kernel, thus we can simplify the check and remove completely that dependency. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Gary Guo <gary@garyguo.net> Tested-by: Gary Guo <gary@garyguo.net> Tested-by: Jesung Yang <y.j3ms.n@gmail.com> Link: https://patch.msgid.link/20251124151837.2184382-18-ojeda@kernel.org Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

When deassigning a KVM_IRQFD, don't clobber the irqfd's copy of the IRQ's routing entry as doing so breaks kvm_arch_irq_bypass_del_producer() on x86 and arm64, which explicitly look for KVM_IRQ_ROUTING_MSI. Instead, to handle a concurrent routing update, verify that the irqfd is still active before consuming the routing information. As evidenced by the x86 and arm64 bugs, and another bug in kvm_arch_update_irqfd_routing() (see below), clobbering the entry type without notifying arch code is surprising and error prone. As a bonus, checking that the irqfd is active provides a convenient location for documenting _why_ KVM must not consume the routing entry for an irqfd that is in the process of being deassigned: once the irqfd is deleted from the list (which happens *before* the eventfd is detached), it will no longer receive updates via kvm_irq_routing_update(), and so KVM could deliver an event using stale routing information (relative to KVM_SET_GSI_ROUTING returning to userspace). As an even better bonus, explicitly checking for the irqfd being active fixes a similar bug to the one the clobbering is trying to prevent: if an irqfd is deactivated, and then its routing is changed, kvm_irq_routing_update() won't invoke kvm_arch_update_irqfd_routing() (because the irqfd isn't in the list). And so if the irqfd is in bypass mode, IRQs will continue to be posted using the old routing information. As for kvm_arch_irq_bypass_del_producer(), clobbering the routing type results in KVM incorrectly keeping the IRQ in bypass mode, which is especially problematic on AMD as KVM tracks IRQs that are being posted to a vCPU in a list whose lifetime is tied to the irqfd. Without the help of KASAN to detect use-after-free, the most common sympton on AMD is a NULL pointer deref in amd_iommu_update_ga() due to the memory for irqfd structure being re-allocated and zeroed, resulting in irqfd->irq_bypass_data being NULL when read by avic_update_iommu_vcpu_affinity(): BUG: kernel NULL pointer dereference, address: 0000000000000018 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 40cf2b9067 P4D 40cf2b9067 PUD 408362a067 PMD 0 Oops: Oops: 0000 [#1] SMP CPU: 6 UID: 0 PID: 40383 Comm: vfio_irq_test Tainted: G U W O 6.19.0-smp--5dddc257e6b2-irqfd #31 NONE Tainted: [U]=USER, [W]=WARN, [O]=OOT_MODULE Hardware name: Google, Inc. Arcadia_IT_80/Arcadia_IT_80, BIOS 34.78.2-0 09/05/2025 RIP: 0010:amd_iommu_update_ga+0x19/0xe0 Call Trace: <TASK> avic_update_iommu_vcpu_affinity+0x3d/0x90 [kvm_amd] __avic_vcpu_load+0xf4/0x130 [kvm_amd] kvm_arch_vcpu_load+0x89/0x210 [kvm] vcpu_load+0x30/0x40 [kvm] kvm_arch_vcpu_ioctl_run+0x45/0x620 [kvm] kvm_vcpu_ioctl+0x571/0x6a0 [kvm] __se_sys_ioctl+0x6d/0xb0 do_syscall_64+0x6f/0x9d0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x46893b </TASK> ---[ end trace 0000000000000000 ]--- If AVIC is inhibited when the irfd is deassigned, the bug will manifest as list corruption, e.g. on the next irqfd assignment. list_add corruption. next->prev should be prev (ffff8d474d5cd588), but was 0000000000000000. (next=ffff8d8658f86530). ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:31! Oops: invalid opcode: 0000 [#1] SMP CPU: 128 UID: 0 PID: 80818 Comm: vfio_irq_test Tainted: G U W O 6.19.0-smp--f19dc4d680ba-irqfd #28 NONE Tainted: [U]=USER, [W]=WARN, [O]=OOT_MODULE Hardware name: Google, Inc. Arcadia_IT_80/Arcadia_IT_80, BIOS 34.78.2-0 09/05/2025 RIP: 0010:__list_add_valid_or_report+0x97/0xc0 Call Trace: <TASK> avic_pi_update_irte+0x28e/0x2b0 [kvm_amd] kvm_pi_update_irte+0xbf/0x190 [kvm] kvm_arch_irq_bypass_add_producer+0x72/0x90 [kvm] irq_bypass_register_consumer+0xcd/0x170 [irqbypass] kvm_irqfd+0x4c6/0x540 [kvm] kvm_vm_ioctl+0x118/0x5d0 [kvm] __se_sys_ioctl+0x6d/0xb0 do_syscall_64+0x6f/0x9d0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 </TASK> ---[ end trace 0000000000000000 ]--- On Intel and arm64, the bug is less noisy, as the end result is that the device keeps posting IRQs to the vCPU even after it's been deassigned. Note, the worst of the breakage can be traced back to commit cb21073 ("KVM: Pass new routing entries and irqfd when updating IRTEs"), as before that commit KVM would pull the routing information from the per-VM routing table. But as above, similar bugs have existed since support for IRQ bypass was added. E.g. if a routing change finished before irq_shutdown() invoked kvm_arch_irq_bypass_del_producer(), VMX and SVM would see stale routing information and potentially leave the irqfd in bypass mode. Alternatively, x86 could be fixed by explicitly checking irq_bypass_vcpu instead of irq_entry.type in kvm_arch_irq_bypass_del_producer(), and arm64 could be modified to utilize irq_bypass_vcpu in a similar manner. But (a) that wouldn't fix the routing updates bug, and (b) fixing core code doesn't preclude x86 (or arm64) from adding such code as a sanity check (spoiler alert). Fixes: f70c20a ("KVM: Add an arch specific hooks in 'struct kvm_kernel_irqfd'") Fixes: cb21073 ("KVM: Pass new routing entries and irqfd when updating IRTEs") Fixes: a0d7e2f ("KVM: arm64: vgic-v4: Only attempt vLPI mapping for actual MSIs") Cc: stable@vger.kernel.org Cc: Marc Zyngier <maz@kernel.org> Cc: Oliver Upton <oupton@kernel.org> Link: https://patch.msgid.link/20260113174606.104978-2-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>

…pt_rt' Jiayuan Chen says: ==================== bpf: Fix per-CPU bulk queue races on PREEMPT_RT On PREEMPT_RT kernels, local_bh_disable() only calls migrate_disable() (when PREEMPT_RT_NEEDS_BH_LOCK is not set) and does not disable preemption. This means CFS scheduling can preempt a task inside the per-CPU bulk queue (bq) operations in cpumap and devmap, allowing another task on the same CPU to concurrently access the same bq, leading to use-after-free, list corruption, and kernel panics. Patch 1 fixes the cpumap race in bq_flush_to_queue(), originally reported by syzbot [1]. Patch 2 fixes the same class of race in devmap's bq_xmit_all(), identified by code inspection after Sebastian Andrzej Siewior pointed out that devmap has the same per-CPU bulk queue pattern [2]. Both patches use local_lock_nested_bh() to serialize access to the per-CPU bq. On non-RT this is a pure lockdep annotation with no overhead; on PREEMPT_RT it provides a per-CPU sleeping lock. To reproduce the devmap race, insert an mdelay(100) in bq_xmit_all() after "cnt = bq->count" and before the actual transmit loop. Then pin two threads to the same CPU, each running BPF_PROG_TEST_RUN with an XDP program that redirects to a DEVMAP entry (e.g. a veth pair). CFS timeslicing during the mdelay window causes interleaving. Without the fix, KASAN reports null-ptr-deref due to operating on freed frames: BUG: KASAN: null-ptr-deref in __build_skb_around+0x22d/0x340 Write of size 32 at addr 0000000000000d50 by task devmap_race_rep/449 CPU: 0 UID: 0 PID: 449 Comm: devmap_race_rep Not tainted 6.19.0+ #31 PREEMPT_RT Call Trace: <TASK> __build_skb_around+0x22d/0x340 build_skb_around+0x25/0x260 __xdp_build_skb_from_frame+0x103/0x860 veth_xdp_rcv_bulk_skb.isra.0+0x162/0x320 veth_xdp_rcv.constprop.0+0x61e/0xbb0 veth_poll+0x280/0xb50 __napi_poll.constprop.0+0xa5/0x590 net_rx_action+0x4b0/0xea0 handle_softirqs.isra.0+0x1b3/0x780 __local_bh_enable_ip+0x12a/0x240 xdp_test_run_batch.constprop.0+0xedd/0x1f60 bpf_test_run_xdp_live+0x304/0x640 bpf_prog_test_run_xdp+0xd24/0x1b70 __sys_bpf+0x61c/0x3e00 </TASK> Kernel panic - not syncing: Fatal exception in interrupt [1] https://lore.kernel.org/all/69369331.a70a0220.38f243.009d.GAE@google.com/T/ [2] https://lore.kernel.org/bpf/20260212023634.366343-1-jiayuan.chen@linux.dev/ v3 -> v4: https://lore.kernel.org/all/20260213034018.284146-1-jiayuan.chen@linux.dev/ - Move panic trace to cover letter. (Sebastian Andrzej Siewior) - Add Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> to both patches from cover letter. v2 -> v3: https://lore.kernel.org/bpf/20260212023634.366343-1-jiayuan.chen@linux.dev/ - Fix commit message: remove incorrect "spin_lock() becomes rt_mutex" claim, the per-CPU bq has no spin_lock at all. (Sebastian Andrzej Siewior) - Fix commit message: accurately describe local_lock_nested_bh() behavior instead of referencing local_lock(). (Sebastian Andrzej Siewior) - Remove incomplete discussion of snapshot alternative. (Sebastian Andrzej Siewior) - Remove panic trace from commit message. (Sebastian Andrzej Siewior) - Add patch 2/2 for devmap, same race pattern. (Sebastian Andrzej Siewior) v1 -> v2: https://lore.kernel.org/bpf/20260211064417.196401-1-jiayuan.chen@linux.dev/ - Use local_lock_nested_bh()/local_unlock_nested_bh() instead of local_lock()/local_unlock(), since these paths already run under local_bh_disable(). (Sebastian Andrzej Siewior) - Replace "Caller must hold bq->bq_lock" comment with lockdep_assert_held() in bq_flush_to_queue(). (Sebastian Andrzej Siewior) - Fix Fixes tag to 3253cb4 ("softirq: Allow to drop the softirq-BKL lock on PREEMPT_RT") which is the actual commit that makes the race possible. (Sebastian Andrzej Siewior) ==================== Link: https://patch.msgid.link/20260225121459.183121-1-jiayuan.chen@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>

DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

71ba2b4

…licts PR URL: https://www.github.com/delphix/linux-kernel-generic/pull/31

palash-gandhi force-pushed the dlpx/pr/palash-delphix/43d53b15-628a-4120-b44b-32d7c7a42932 branch from 1693ba7 to 71ba2b4 Compare September 15, 2023 01:12

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DLPX-87969 Modify kernel build to include Delphix's custom annotations delphix/linux-pkg#300

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palash-gandhi merged commit ee9e7eb into develop Sep 19, 2023

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

f7cd9d2

…licts (#31) PR URL: https://www.github.com/delphix/linux-kernel-generic/pull/31

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

f542cbe

…licts (#31) PR URL: https://www.github.com/delphix/linux-kernel-generic/pull/31

delphix-devops-bot pushed a commit that referenced this pull request Oct 11, 2023

DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

320e8e7

…licts (#31) PR URL: https://www.github.com/delphix/linux-kernel-generic/pull/31

delphix-devops-bot pushed a commit that referenced this pull request Oct 21, 2023

DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

841763d

…licts (#31) PR URL: https://www.github.com/delphix/linux-kernel-generic/pull/31

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

023c11d

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

e2a95dc

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

2b74912

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

2d556cb

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

0413aae

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

b2b69bb

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

394736d

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

68f50c8

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

2161d90

…licts (#31) PR URL: https://www.github.com/delphix/linux-kernel-generic/pull/31

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

9ace603

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

ca56c81

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

fcc4a28

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

6dd6bfb

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

6e59457

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delphix-devops-bot pushed a commit that referenced this pull request Apr 20, 2024

DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

79cff3e

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delphix-devops-bot pushed a commit that referenced this pull request May 16, 2024

DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

066bad2

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palash-gandhi mentioned this pull request Oct 16, 2024

DLPX-92453 Cherry-pick Delphix commits of linux-kernel-generic for LTS upgrade #44

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

c0a8f8a

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

776aefe

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

684b85f

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

5ef45e0

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delphix-devops-bot pushed a commit that referenced this pull request Dec 27, 2024

DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

38378e8

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

bafd827

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

f39ff6c

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

c4331f3

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

2a21763

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

f16b71d

…licts (#31) PR URL: https://www.github.com/delphix/linux-kernel-generic/pull/31

delphix-devops-bot pushed a commit that referenced this pull request Jan 5, 2025

DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

1fa406f

…licts (#31) PR URL: https://www.github.com/delphix/linux-kernel-generic/pull/31

delphix-devops-bot pushed a commit that referenced this pull request Jan 6, 2025

DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

f8c2e59

…licts (#31) PR URL: https://www.github.com/delphix/linux-kernel-generic/pull/31

delphix-devops-bot pushed a commit that referenced this pull request Jan 7, 2025

DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

cb5ad0c

…licts (#31) PR URL: https://www.github.com/delphix/linux-kernel-generic/pull/31

delphix-devops-bot pushed a commit that referenced this pull request Jan 30, 2025

DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

ea86035

…licts (#31) PR URL: https://www.github.com/delphix/linux-kernel-generic/pull/31

delphix-devops-bot pushed a commit that referenced this pull request Jan 31, 2025

DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conf…

c40a699

…licts (#31) PR URL: https://www.github.com/delphix/linux-kernel-generic/pull/31

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DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conflicts - #31

DLPX-87970 Move Delphix annotations to linux-pkg to reduce merge conflicts#31
palash-gandhi merged 1 commit into
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dlpx/pr/palash-delphix/43d53b15-628a-4120-b44b-32d7c7a42932

palash-gandhi commented Sep 15, 2023 •

edited

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palash-gandhi commented Sep 15, 2023 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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palash-gandhi commented Sep 15, 2023 •

edited

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