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================================================================== BUG: KCSAN: data-race in fsnotify / fsnotify_detach_mark write to 0xffff88812b349c24 of 4 bytes by task 19070 on cpu 0: fsnotify_detach_mark+0x80/0x120 fs/notify/mark.c:390 fsnotify_clear_marks_by_group+0x298/0x3e0 fs/notify/mark.c:761 fsnotify_destroy_group+0x51/0x170 fs/notify/group.c:61 inotify_release+0x21/0x30 fs/notify/inotify/inotify_user.c:273 __fput+0x246/0x4d0 fs/file_table.c:281 ____fput+0x11/0x20 fs/file_table.c:314 task_work_run+0x8e/0x110 kernel/task_work.c:135 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:139 [inline] exit_to_user_mode_prepare+0x1b2/0x210 kernel/entry/common.c:166 syscall_exit_to_user_mode+0x16/0x30 kernel/entry/common.c:241 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88812b349c24 of 4 bytes by task 19077 on cpu 1: send_to_group fs/notify/fsnotify.c:297 [inline] fsnotify+0x713/0xe50 fs/notify/fsnotify.c:504 __fsnotify_parent+0x3a4/0x470 fs/notify/fsnotify.c:223 fsnotify_parent include/linux/fsnotify.h:68 [inline] fsnotify_file include/linux/fsnotify.h:90 [inline] fsnotify_modify include/linux/fsnotify.h:255 [inline] do_iter_write+0x426/0x4b0 fs/read_write.c:1022 vfs_iter_write+0x4c/0x70 fs/read_write.c:1059 iter_file_splice_write+0x41a/0x770 fs/splice.c:750 do_splice_from fs/splice.c:846 [inline] direct_splice_actor+0x95/0x160 fs/splice.c:1016 splice_direct_to_actor+0x365/0x660 fs/splice.c:971 do_splice_direct+0xf2/0x170 fs/splice.c:1059 do_sendfile+0x56a/0xba0 fs/read_write.c:1540 __do_sys_sendfile64 fs/read_write.c:1595 [inline] __se_sys_sendfile64 fs/read_write.c:1587 [inline] __x64_sys_sendfile64+0xa9/0x130 fs/read_write.c:1587 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 19077 Comm: syz-executor.2 Not tainted 5.8.0-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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2020/08/15 20:17 | upstream | 410520d07f5c | 5ce13532 | .config | console log | report | ci2-upstream-kcsan-gce |