loop3: detected capacity change from 0 to 1024 ================================================================== BUG: KCSAN: data-race in __mark_inode_dirty / inode_cgwb_move_to_attached write to 0xffff88812f959838 of 4 bytes by task 15077 on cpu 1: inode_cgwb_move_to_attached+0x9a/0x300 fs/fs-writeback.c:310 writeback_single_inode+0x2b5/0x3f0 fs/fs-writeback.c:1796 sync_inode_metadata+0x5c/0x90 fs/fs-writeback.c:2849 generic_buffers_fsync_noflush+0xd8/0x120 fs/buffer.c:610 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 read to 0xffff88812f959838 of 4 bytes by task 15075 on cpu 0: __mark_inode_dirty+0x198/0x7e0 fs/fs-writeback.c:2515 mark_inode_dirty include/linux/fs.h:2474 [inline] ext4_write_inline_data_end+0x584/0x7b0 fs/ext4/inline.c:800 ext4_write_end+0x3a2/0x720 fs/ext4/inode.c:1294 generic_perform_write+0x33c/0x4a0 mm/filemap.c:4069 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 value changed: 0x00000002 -> 0x00000008 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 15075 Comm: syz.3.3350 Not tainted 6.12.0-rc7-syzkaller-00125-gcfaaa7d010d1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ==================================================================