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================================================================== BUG: KCSAN: data-race in ext4_trim_fs / mb_mark_used write to 0xffff8881013da884 of 4 bytes by task 26169 on cpu 1: mb_mark_used+0x13c/0xc40 fs/ext4/mballoc.c:1607 ext4_trim_extent+0xb8/0x410 fs/ext4/mballoc.c:5680 ext4_trim_all_free+0x388/0x890 fs/ext4/mballoc.c:5741 ext4_trim_fs+0x3f3/0x520 fs/ext4/mballoc.c:5847 __ext4_ioctl fs/ext4/ioctl.c:1126 [inline] ext4_ioctl+0x12e6/0x2c00 fs/ext4/ioctl.c:1332 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:739 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:739 do_syscall_64+0x34/0x50 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff8881013da884 of 4 bytes by task 26185 on cpu 0: ext4_trim_fs+0x3af/0x520 fs/ext4/mballoc.c:5846 __ext4_ioctl fs/ext4/ioctl.c:1126 [inline] ext4_ioctl+0x12e6/0x2c00 fs/ext4/ioctl.c:1332 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:739 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:739 do_syscall_64+0x34/0x50 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 26185 Comm: syz-executor.5 Not tainted 5.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2021/04/18 04:14 | upstream | 194cf4825638 | 7e2b734b | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in ext4_trim_fs / mb_mark_used |