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================================================================== BUG: KCSAN: data-race in fifo_open / pipe_poll read-write to 0xffff88811abdcdf4 of 4 bytes by task 8841 on cpu 1: fifo_open+0x2ae/0x5d0 fs/pipe.c:1209 do_dentry_open+0x649/0xa20 fs/open.c:964 vfs_open+0x37/0x1e0 fs/open.c:1094 do_open fs/namei.c:3887 [inline] path_openat+0x1c5e/0x2170 fs/namei.c:4046 do_filp_open+0x109/0x230 fs/namei.c:4073 do_sys_openat2+0xa6/0x110 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0xf2/0x120 fs/open.c:1463 x64_sys_call+0x1af/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff88811abdcdf4 of 4 bytes by task 8836 on cpu 0: pipe_poll+0x1a8/0x250 fs/pipe.c:689 vfs_poll include/linux/poll.h:82 [inline] __io_arm_poll_handler+0x1eb/0xb70 io_uring/poll.c:583 io_poll_add+0x69/0xe0 io_uring/poll.c:893 __io_issue_sqe+0xfb/0x2e0 io_uring/io_uring.c:1735 io_issue_sqe+0x53/0x970 io_uring/io_uring.c:1758 io_queue_sqe io_uring/io_uring.c:1965 [inline] io_submit_sqe io_uring/io_uring.c:2221 [inline] io_submit_sqes+0x667/0xfd0 io_uring/io_uring.c:2334 __do_sys_io_uring_enter io_uring/io_uring.c:3401 [inline] __se_sys_io_uring_enter+0x1c1/0x1b70 io_uring/io_uring.c:3335 __x64_sys_io_uring_enter+0x78/0x90 io_uring/io_uring.c:3335 x64_sys_call+0x28c8/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:427 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00000001 -> 0x00000002 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 8836 Comm: syz.4.1526 Not tainted 6.16.0-rc1-syzkaller-00003-gf09079bd04a9 #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2025/06/10 20:30 | upstream | f09079bd04a9 | 5d7e17ca | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in fifo_open / pipe_poll |