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================================================================== BUG: KCSAN: data-race in file_write_and_wait_range / xas_clear_mark write to 0xffff8881065a7424 of 4 bytes by task 4687 on cpu 1: xa_mark_clear lib/xarray.c:77 [inline] xas_clear_mark+0x169/0x180 lib/xarray.c:925 __folio_start_writeback+0x2d9/0x430 mm/page-writeback.c:3164 ext4_bio_write_folio+0x591/0x9d0 fs/ext4/page-io.c:556 mpage_submit_folio fs/ext4/inode.c:1932 [inline] mpage_process_page_bufs+0x486/0x5d0 fs/ext4/inode.c:2045 mpage_prepare_extent_to_map+0x788/0xb80 fs/ext4/inode.c:2546 ext4_do_writepages+0xa20/0x2130 fs/ext4/inode.c:2733 ext4_writepages+0x159/0x2e0 fs/ext4/inode.c:2824 do_writepages+0x1d8/0x480 mm/page-writeback.c:2708 filemap_fdatawrite_wbc mm/filemap.c:388 [inline] __filemap_fdatawrite_range mm/filemap.c:421 [inline] file_write_and_wait_range+0x168/0x2f0 mm/filemap.c:778 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:187 generic_write_sync include/linux/fs.h:2919 [inline] ext4_buffered_write_iter+0x326/0x370 fs/ext4/file.c:305 ext4_file_write_iter+0x383/0xf20 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+0x398/0x660 fs/read_write.c:1363 __do_sys_sendfile64 fs/read_write.c:1424 [inline] __se_sys_sendfile64 fs/read_write.c:1410 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1410 x64_sys_call+0xfbd/0x2dc0 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 0xffff8881065a7424 of 4 bytes by task 4690 on cpu 0: xa_marked include/linux/xarray.h:424 [inline] mapping_tagged include/linux/fs.h:506 [inline] filemap_fdatawrite_wbc mm/filemap.c:384 [inline] __filemap_fdatawrite_range mm/filemap.c:421 [inline] file_write_and_wait_range+0x116/0x2f0 mm/filemap.c:778 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:187 generic_write_sync include/linux/fs.h:2919 [inline] ext4_buffered_write_iter+0x326/0x370 fs/ext4/file.c:305 ext4_file_write_iter+0x383/0xf20 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+0x398/0x660 fs/read_write.c:1363 __do_sys_sendfile64 fs/read_write.c:1424 [inline] __se_sys_sendfile64 fs/read_write.c:1410 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1410 x64_sys_call+0xfbd/0x2dc0 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: 0x0e000021 -> 0x04000021 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 4690 Comm: syz.4.347 Not tainted 6.13.0-syzkaller-00164-g100ceb4817a2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2025/01/20 20:46 | upstream | 100ceb4817a2 | 6e87cfa2 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in file_write_and_wait_range / xas_clear_mark | ||
2024/12/30 09:02 | upstream | fc033cf25e61 | d3ccff63 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in file_write_and_wait_range / xas_clear_mark |