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================================================================== BUG: KCSAN: data-race in redirty_tail_locked / vfs_fsync_range read-write to 0xffff88810059e0c8 of 4 bytes by task 6992 on cpu 0: redirty_tail_locked+0x56/0x280 fs/fs-writeback.c:1373 writeback_single_inode+0x21e/0x3e0 fs/fs-writeback.c:1821 sync_inode_metadata+0x5b/0x90 fs/fs-writeback.c:2883 generic_buffers_fsync_noflush+0xd9/0x120 fs/buffer.c:621 ext4_fsync_nojournal fs/ext4/fsync.c:88 [inline] ext4_sync_file+0x1ab/0x690 fs/ext4/fsync.c:147 vfs_fsync_range+0x10a/0x130 fs/sync.c:187 generic_write_sync include/linux/fs.h:2976 [inline] ext4_buffered_write_iter+0x34f/0x3c0 fs/ext4/file.c:305 ext4_file_write_iter+0x383/0xf00 fs/ext4/file.c:-1 iter_file_splice_write+0x5ef/0x970 fs/splice.c:738 do_splice_from fs/splice.c:935 [inline] direct_splice_actor+0x153/0x2a0 fs/splice.c:1158 splice_direct_to_actor+0x30f/0x680 fs/splice.c:1102 do_splice_direct_actor fs/splice.c:1201 [inline] do_splice_direct+0xda/0x150 fs/splice.c:1227 do_sendfile+0x380/0x640 fs/read_write.c:1368 __do_sys_sendfile64 fs/read_write.c:1429 [inline] __se_sys_sendfile64 fs/read_write.c:1415 [inline] __x64_sys_sendfile64+0x105/0x150 fs/read_write.c:1415 x64_sys_call+0xb39/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:41 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd0/0x1a0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff88810059e0c8 of 4 bytes by task 6988 on cpu 1: vfs_fsync_range+0x9b/0x130 fs/sync.c:185 generic_write_sync include/linux/fs.h:2976 [inline] ext4_buffered_write_iter+0x34f/0x3c0 fs/ext4/file.c:305 ext4_file_write_iter+0x383/0xf00 fs/ext4/file.c:-1 iter_file_splice_write+0x5ef/0x970 fs/splice.c:738 do_splice_from fs/splice.c:935 [inline] direct_splice_actor+0x153/0x2a0 fs/splice.c:1158 splice_direct_to_actor+0x30f/0x680 fs/splice.c:1102 do_splice_direct_actor fs/splice.c:1201 [inline] do_splice_direct+0xda/0x150 fs/splice.c:1227 do_sendfile+0x380/0x640 fs/read_write.c:1368 __do_sys_sendfile64 fs/read_write.c:1429 [inline] __se_sys_sendfile64 fs/read_write.c:1415 [inline] __x64_sys_sendfile64+0x105/0x150 fs/read_write.c:1415 x64_sys_call+0xb39/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:41 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd0/0x1a0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x0000003a -> 0x00000002 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 6988 Comm: syz.2.1007 Not tainted 6.15.0-rc5-syzkaller-00353-gcd802e7e5f1e #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2025/05/11 21:30 | upstream | cd802e7e5f1e | 77908e5f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in redirty_tail_locked / vfs_fsync_range | ||
2025/04/01 01:24 | upstream | 1e7857b28020 | d3999433 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in redirty_tail_locked / vfs_fsync_range | ||
2025/02/20 06:57 | upstream | 87a132e73910 | 50668798 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in redirty_tail_locked / vfs_fsync_range | ||
2025/01/30 09:04 | upstream | ebbb8be421ee | afe4eff5 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in redirty_tail_locked / vfs_fsync_range | ||
2025/01/30 09:02 | upstream | ebbb8be421ee | afe4eff5 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in redirty_tail_locked / vfs_fsync_range | ||
2025/01/29 16:04 | upstream | 05dbaf8dd8bf | 136953f1 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in redirty_tail_locked / vfs_fsync_range | ||
2025/01/29 08:14 | upstream | 05dbaf8dd8bf | 865ef71e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in redirty_tail_locked / vfs_fsync_range | ||
2025/01/27 12:24 | upstream | 9c5968db9e62 | d99a33ad | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in redirty_tail_locked / vfs_fsync_range | ||
2024/12/16 10:41 | upstream | 78d4f34e2115 | eec85da6 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in redirty_tail_locked / vfs_fsync_range | ||
2024/11/28 22:24 | upstream | 7af08b57bcb9 | 5df23865 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in redirty_tail_locked / vfs_fsync_range |