EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ================================================================== BUG: KCSAN: data-race in __xa_set_mark / xas_find_marked write to 0xffff88810648747c of 4 bytes by task 5439 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+0x134/0x230 fs/buffer.c:1205 __block_commit_write fs/buffer.c:2199 [inline] block_write_end+0x16d/0x300 fs/buffer.c:2275 ext4_write_end+0x177/0x820 fs/ext4/inode.c:1318 generic_perform_write+0x36e/0x580 mm/filemap.c:4035 ext4_buffered_write_iter+0x1f6/0x380 fs/ext4/file.c:299 ext4_file_write_iter+0x29f/0xe30 iter_file_splice_write+0x5e6/0x970 fs/splice.c:743 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0x16c/0x2c0 fs/splice.c:1164 splice_direct_to_actor+0x305/0x670 fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0xd7/0x150 fs/splice.c:1233 do_sendfile+0x3ab/0x950 fs/read_write.c:1295 __do_sys_sendfile64 fs/read_write.c:1362 [inline] __se_sys_sendfile64 fs/read_write.c:1348 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1348 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 0xffff88810648747c of 4 bytes by task 5435 on cpu 0: xa_marked include/linux/xarray.h:424 [inline] xas_find_marked+0x60a/0x660 lib/xarray.c:1343 find_get_entry+0x54/0x390 mm/filemap.c:1992 filemap_get_folios_tag+0x9e/0x210 mm/filemap.c:2242 __filemap_fdatawait_range+0x82/0x140 mm/filemap.c:523 file_write_and_wait_range+0x110/0x170 mm/filemap.c:792 generic_buffers_fsync_noflush+0x4c/0x130 fs/buffer.c:600 ext4_fsync_nojournal fs/ext4/fsync.c:88 [inline] ext4_sync_file+0x20b/0x6c0 fs/ext4/fsync.c:151 vfs_fsync_range+0x122/0x140 fs/sync.c:188 generic_write_sync include/linux/fs.h:2816 [inline] ext4_buffered_write_iter+0x338/0x380 fs/ext4/file.c:305 ext4_file_write_iter+0x29f/0xe30 iter_file_splice_write+0x5e6/0x970 fs/splice.c:743 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0x16c/0x2c0 fs/splice.c:1164 splice_direct_to_actor+0x305/0x670 fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0xd7/0x150 fs/splice.c:1233 do_sendfile+0x3ab/0x950 fs/read_write.c:1295 __do_sys_sendfile64 fs/read_write.c:1362 [inline] __se_sys_sendfile64 fs/read_write.c:1348 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1348 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: 0x04000021 -> 0x0a000021 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 5435 Comm: syz.0.810 Not tainted 6.11.0-rc3-syzkaller-00013-g6b0f8db921ab #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 ================================================================== ================================================================== BUG: KCSAN: data-race in __writeback_single_inode / generic_buffers_fsync_noflush read-write to 0xffff888106487390 of 8 bytes by task 5439 on cpu 1: __writeback_single_inode+0x201/0x870 fs/fs-writeback.c:1687 writeback_single_inode+0x12f/0x4a0 fs/fs-writeback.c:1772 sync_inode_metadata+0x5c/0x90 fs/fs-writeback.c:2842 generic_buffers_fsync_noflush+0xe4/0x130 fs/buffer.c:610 ext4_fsync_nojournal fs/ext4/fsync.c:88 [inline] ext4_sync_file+0x20b/0x6c0 fs/ext4/fsync.c:151 vfs_fsync_range+0x122/0x140 fs/sync.c:188 generic_write_sync include/linux/fs.h:2816 [inline] ext4_buffered_write_iter+0x338/0x380 fs/ext4/file.c:305 ext4_file_write_iter+0x29f/0xe30 iter_file_splice_write+0x5e6/0x970 fs/splice.c:743 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0x16c/0x2c0 fs/splice.c:1164 splice_direct_to_actor+0x305/0x670 fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0xd7/0x150 fs/splice.c:1233 do_sendfile+0x3ab/0x950 fs/read_write.c:1295 __do_sys_sendfile64 fs/read_write.c:1362 [inline] __se_sys_sendfile64 fs/read_write.c:1348 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1348 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 0xffff888106487390 of 8 bytes by task 5435 on cpu 0: generic_buffers_fsync_noflush+0x89/0x130 fs/buffer.c:605 ext4_fsync_nojournal fs/ext4/fsync.c:88 [inline] ext4_sync_file+0x20b/0x6c0 fs/ext4/fsync.c:151 vfs_fsync_range+0x122/0x140 fs/sync.c:188 generic_write_sync include/linux/fs.h:2816 [inline] ext4_buffered_write_iter+0x338/0x380 fs/ext4/file.c:305 ext4_file_write_iter+0x29f/0xe30 iter_file_splice_write+0x5e6/0x970 fs/splice.c:743 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0x16c/0x2c0 fs/splice.c:1164 splice_direct_to_actor+0x305/0x670 fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0xd7/0x150 fs/splice.c:1233 do_sendfile+0x3ab/0x950 fs/read_write.c:1295 __do_sys_sendfile64 fs/read_write.c:1362 [inline] __se_sys_sendfile64 fs/read_write.c:1348 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1348 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: 0x0000000000000084 -> 0x0000000000000000 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 5435 Comm: syz.0.810 Not tainted 6.11.0-rc3-syzkaller-00013-g6b0f8db921ab #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 ==================================================================