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================================================================== BUG: KCSAN: data-race in __xa_set_mark / filemap_fdatawrite_wbc write to 0xffff8881069aeb24 of 4 bytes by task 4617 on cpu 1: xa_mark_set lib/xarray.c:71 [inline] xas_set_mark lib/xarray.c:893 [inline] __xa_set_mark+0x182/0x1b0 lib/xarray.c:1939 __folio_mark_dirty+0x3b5/0x4e0 mm/page-writeback.c:2798 mark_buffer_dirty+0x148/0x250 fs/buffer.c:1201 __block_commit_write fs/buffer.c:2194 [inline] block_write_end+0x123/0x210 fs/buffer.c:2270 ext4_write_end+0x136/0x720 fs/ext4/inode.c:1297 generic_perform_write+0x33c/0x4a0 mm/filemap.c:4065 ext4_buffered_write_iter+0x1ea/0x370 fs/ext4/file.c:299 ext4_file_write_iter+0x293/0xe10 iter_file_splice_write+0x5f1/0x980 fs/splice.c:743 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0x160/0x2c0 fs/splice.c:1164 splice_direct_to_actor+0x302/0x670 fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0xd7/0x150 fs/splice.c:1233 do_sendfile+0x39b/0x970 fs/read_write.c:1388 __do_sys_sendfile64 fs/read_write.c:1455 [inline] __se_sys_sendfile64 fs/read_write.c:1441 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1441 x64_sys_call+0xed5/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:41 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff8881069aeb24 of 4 bytes by task 4620 on cpu 0: xa_marked include/linux/xarray.h:424 [inline] mapping_tagged include/linux/fs.h:502 [inline] filemap_fdatawrite_wbc+0x5c/0x100 mm/filemap.c:394 __filemap_fdatawrite_range mm/filemap.c:431 [inline] file_write_and_wait_range+0xc4/0x250 mm/filemap.c:788 generic_buffers_fsync_noflush+0x46/0x120 fs/buffer.c:600 ext4_fsync_nojournal fs/ext4/fsync.c:88 [inline] ext4_sync_file+0x1ff/0x6c0 fs/ext4/fsync.c:151 vfs_fsync_range+0x116/0x130 fs/sync.c:188 generic_write_sync include/linux/fs.h:2871 [inline] ext4_buffered_write_iter+0x326/0x370 fs/ext4/file.c:305 ext4_file_write_iter+0x293/0xe10 iter_file_splice_write+0x5f1/0x980 fs/splice.c:743 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0x160/0x2c0 fs/splice.c:1164 splice_direct_to_actor+0x302/0x670 fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0xd7/0x150 fs/splice.c:1233 do_sendfile+0x39b/0x970 fs/read_write.c:1388 __do_sys_sendfile64 fs/read_write.c:1455 [inline] __se_sys_sendfile64 fs/read_write.c:1441 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1441 x64_sys_call+0xed5/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:41 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00000021 -> 0x0a000021 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 4620 Comm: syz.0.242 Tainted: G W 6.11.0-syzkaller-10669-g11a299a7933e #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/09/26 12:38 | upstream | 11a299a7933e | 0d19f247 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in __xa_set_mark / filemap_fdatawrite_wbc |