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================================================================== BUG: KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers read to 0xffff88812534ea18 of 8 bytes by task 15980 on cpu 1: mark_buffer_dirty_inode+0xa1/0x260 fs/buffer.c:596 fat16_ent_put+0x82/0x90 fs/fat/fatent.c:182 fat_alloc_clusters+0x507/0xc40 fs/fat/fatent.c:501 fat_add_cluster+0x3d/0xd0 fs/fat/inode.c:107 fat_fallocate+0x152/0x1f0 fs/fat/file.c:291 vfs_fallocate+0x3be/0x650 fs/open.c:309 ioctl_preallocate+0x12b/0x190 fs/ioctl.c:491 file_ioctl fs/ioctl.c:537 [inline] do_vfs_ioctl+0xb14/0xcf0 fs/ioctl.c:732 ksys_ioctl+0xbd/0xe0 fs/ioctl.c:749 __do_sys_ioctl fs/ioctl.c:756 [inline] __se_sys_ioctl fs/ioctl.c:754 [inline] __x64_sys_ioctl+0x4c/0x60 fs/ioctl.c:754 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff88812534ea18 of 8 bytes by task 15989 on cpu 0: fsync_buffers_list fs/buffer.c:774 [inline] sync_mapping_buffers+0x4eb/0x6e0 fs/buffer.c:563 fat_file_fsync+0xd4/0x120 fs/fat/file.c:194 vfs_fsync_range+0x82/0x150 fs/sync.c:197 generic_write_sync include/linux/fs.h:2856 [inline] generic_file_write_iter+0x318/0x38c mm/filemap.c:3474 call_write_iter include/linux/fs.h:1902 [inline] do_iter_readv_writev+0x487/0x5b0 fs/read_write.c:693 do_iter_write fs/read_write.c:970 [inline] do_iter_write+0x13b/0x3c0 fs/read_write.c:951 vfs_iter_write+0x5c/0x80 fs/read_write.c:983 iter_file_splice_write+0x530/0x840 fs/splice.c:760 do_splice_from fs/splice.c:863 [inline] direct_splice_actor+0xa0/0xc0 fs/splice.c:1037 splice_direct_to_actor+0x22b/0x540 fs/splice.c:992 do_splice_direct+0x161/0x1e0 fs/splice.c:1080 do_sendfile+0x384/0x7f0 fs/read_write.c:1464 __do_sys_sendfile64 fs/read_write.c:1525 [inline] __se_sys_sendfile64 fs/read_write.c:1511 [inline] __x64_sys_sendfile64+0x12a/0x140 fs/read_write.c:1511 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 15989 Comm: syz-executor.1 Not tainted 5.5.0-rc1-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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020/01/29 22:24 | https://github.com/google/ktsan.git kcsan | 245a43005292 | 5ed23f9a | .config | console log | report | ci2-upstream-kcsan-gce | |||||
| 2020/01/28 05:27 | https://github.com/google/ktsan.git kcsan | 245a43005292 | 56cd6c9b | .config | console log | report | ci2-upstream-kcsan-gce | |||||
| 2020/01/27 08:57 | https://github.com/google/ktsan.git kcsan | 245a43005292 | dd56146d | .config | console log | report | ci2-upstream-kcsan-gce | |||||
| 2020/01/26 13:24 | https://github.com/google/ktsan.git kcsan | 245a43005292 | f4e7270e | .config | console log | report | ci2-upstream-kcsan-gce | |||||
| 2020/01/22 22:07 | https://github.com/google/ktsan.git kcsan | 245a43005292 | 3334d684 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
| 2020/01/17 01:09 | https://github.com/google/ktsan.git kcsan | 245a43005292 | 3de7aabb | .config | console log | report | ci2-upstream-kcsan-gce | |||||
| 2019/12/02 06:45 | https://github.com/google/ktsan.git kcsan | ef798c30ba4e | f879db37 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
| 2019/11/21 16:51 | https://github.com/google/ktsan.git kcsan | 5863cc791e4c | 8098ea0f | .config | console log | report | ci2-upstream-kcsan-gce |