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================================================================== BUG: KCSAN: data-race in __io_cqring_overflow_flush / exit_signals write to 0xffff8880224af02c of 4 bytes by task 26043 on cpu 1: exit_signals+0x10d/0x540 kernel/signal.c:2865 do_exit+0x1b4/0x1690 kernel/exit.c:781 do_group_exit+0xce/0x180 kernel/exit.c:922 get_signal+0xdce/0x14e0 kernel/signal.c:2773 arch_do_signal_or_restart+0x2a/0x270 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x11a/0x1b0 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:294 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8880224af02c of 4 bytes by task 26060 on cpu 0: io_match_task fs/io_uring.c:1077 [inline] __io_cqring_overflow_flush+0x184/0x770 fs/io_uring.c:1787 io_cqring_overflow_flush fs/io_uring.c:1837 [inline] io_uring_cancel_task_requests+0x70a/0xb30 fs/io_uring.c:8982 __io_uring_files_cancel+0x9b/0x200 fs/io_uring.c:9066 io_uring_files_cancel include/linux/io_uring.h:51 [inline] do_exit+0x19a/0x1690 kernel/exit.c:780 do_group_exit+0xce/0x180 kernel/exit.c:922 get_signal+0xdce/0x14e0 kernel/signal.c:2773 arch_do_signal_or_restart+0x2a/0x270 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x11a/0x1b0 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:294 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 26060 Comm: syz-executor.5 Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021/02/17 08:03 | upstream | f40ddce88593 | 052f8d9f | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in __io_cqring_overflow_flush / exit_signals | |||
| 2021/02/14 00:52 | upstream | ac30d8ce28d6 | 98682e5e | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in __io_cqring_overflow_flush / exit_signals | |||
| 2021/02/11 00:58 | upstream | 291009f656e8 | a52ee10a | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in __io_cqring_overflow_flush / exit_signals | |||
| 2021/02/07 10:53 | upstream | 825b5991a46e | 2ce644fc | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in __io_cqring_overflow_flush / exit_signals | |||
| 2021/02/07 03:35 | upstream | 964d069f93c4 | 0655e081 | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in __io_cqring_overflow_flush / exit_signals | |||
| 2021/02/05 13:02 | upstream | dd86e7fa07a3 | 23a562df | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in __io_cqring_overflow_flush / exit_signals | |||
| 2021/02/03 22:45 | upstream | 3afe9076a7c1 | 624dad51 | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in __io_cqring_overflow_flush / exit_signals | |||
| 2021/02/01 21:26 | upstream | 88bb507a74ea | e6b95f32 | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in __io_cqring_overflow_flush / exit_signals |