Warning: Permanently added '10.128.0.95' (ED25519) to the list of known hosts. [+] ioctl LOOP_CTL_GET_FREE successful. [+] close /dev/loop-control successful. [+] open /tmp/backing_file successful. [+] ftruncate /tmp/backing_file successful. [+] open /dev/loop0 successful. [+] ioctl LOOP_SET_FD successful. [+] close loop_fd successful. [+] close backing_file fd successful. [+] pthread_create t1 successful. [+] pthread_create t2 successful. [+] mmap successful. [+] mkdir /tmp/mnt successful. [ 49.418439][ T29] audit: type=1400 audit(1790511474.110:184): avc: denied { read write } for pid=3637 comm="syz-executor636" name="loop-control" dev="devtmpfs" ino=99 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:loop_control_device_t tclass=chr_file permissive=1 [ 49.418492][ T29] audit: type=1400 audit(1790511474.110:185): avc: denied { open } for pid=3637 comm="syz-executor636" path="/dev/loop-control" dev="devtmpfs" ino=99 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:loop_control_device_t tclass=chr_file permissive=1 [ 49.418574][ T29] audit: type=1400 audit(1790511474.110:186): avc: denied { ioctl } for pid=3637 comm="syz-executor636" path="/dev/loop-control" dev="devtmpfs" ino=99 ioctlcmd=0x4c82 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:loop_control_device_t tclass=chr_file permissive=1 [ 49.419934][ T3637] loop0: detected capacity change from 0 to 2048 [ 52.156599][ T29] audit: type=1400 audit(1790511476.850:187): avc: denied { write } for pid=3645 comm="dhcpcd-run-hook" name="hook-state" dev="tmpfs" ino=487 scontext=system_u:system_r:dhcpc_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 52.198001][ T29] audit: type=1400 audit(1790511476.890:188): avc: denied { write } for pid=3656 comm="rm" name="hook-state" dev="tmpfs" ino=487 scontext=system_u:system_r:dhcpc_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 52.611745][ T29] audit: type=1400 audit(1790511477.300:189): avc: denied { write } for pid=3659 comm="dhcpcd-run-hook" name="hook-state" dev="tmpfs" ino=487 scontext=system_u:system_r:dhcpc_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 52.678233][ T29] audit: type=1400 audit(1790511477.370:190): avc: denied { write } for pid=3670 comm="rm" name="hook-state" dev="tmpfs" ino=487 scontext=system_u:system_r:dhcpc_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 53.068409][ T29] audit: type=1400 audit(1790511477.760:191): avc: denied { write } for pid=3673 comm="dhcpcd-run-hook" name="hook-state" dev="tmpfs" ino=487 scontext=system_u:system_r:dhcpc_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 53.120244][ T29] audit: type=1400 audit(1790511477.810:192): avc: denied { write } for pid=3684 comm="rm" name="hook-state" dev="tmpfs" ino=487 scontext=system_u:system_r:dhcpc_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 54.028949][ T29] audit: type=1400 audit(1790511478.720:193): avc: denied { write } for pid=3687 comm="dhcpcd-run-hook" name="hook-state" dev="tmpfs" ino=487 scontext=system_u:system_r:dhcpc_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 54.498922][ T29] kauditd_printk_skb: 1 callbacks suppressed [ 54.498940][ T29] audit: type=1400 audit(1790511479.190:195): avc: denied { write } for pid=3701 comm="dhcpcd-run-hook" name="hook-state" dev="tmpfs" ino=487 scontext=system_u:system_r:dhcpc_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 54.554535][ T29] audit: type=1400 audit(1790511479.240:196): avc: denied { write } for pid=3712 comm="rm" name="hook-state" dev="tmpfs" ino=487 scontext=system_u:system_r:dhcpc_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 54.817016][ T29] audit: type=1400 audit(1790511479.510:197): avc: denied { write } for pid=3715 comm="dhcpcd-run-hook" name="hook-state" dev="tmpfs" ino=487 scontext=system_u:system_r:dhcpc_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 54.867128][ T29] audit: type=1400 audit(1790511479.560:198): avc: denied { write } for pid=3726 comm="rm" name="hook-state" dev="tmpfs" ino=487 scontext=system_u:system_r:dhcpc_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 55.268091][ T29] audit: type=1400 audit(1790511479.960:199): avc: denied { write } for pid=3729 comm="dhcpcd-run-hook" name="hook-state" dev="tmpfs" ino=487 scontext=system_u:system_r:dhcpc_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 55.317900][ T29] audit: type=1400 audit(1790511480.010:200): avc: denied { write } for pid=3740 comm="rm" name="hook-state" dev="tmpfs" ino=487 scontext=system_u:system_r:dhcpc_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 55.446945][ T29] audit: type=1400 audit(1790511480.140:201): avc: denied { write } for pid=3743 comm="dhcpcd-run-hook" name="hook-state" dev="tmpfs" ino=487 scontext=system_u:system_r:dhcpc_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 55.503541][ T29] audit: type=1400 audit(1790511480.190:202): avc: denied { write } for pid=3754 comm="rm" name="hook-state" dev="tmpfs" ino=487 scontext=system_u:system_r:dhcpc_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 69.779420][ T3639] ================================================================== [ 69.779461][ T3639] BUG: KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru [ 69.779503][ T3639] [ 69.779510][ T3639] write to 0xffff888237c277e0 of 8 bytes by task 3638 on cpu 0: [ 69.779527][ T3639] invalidate_bh_lru+0x8a/0xf0 [ 69.779555][ T3639] smp_call_function_many_cond+0x72e/0xbc0 [ 69.779589][ T3639] on_each_cpu_cond_mask+0x35/0x50 [ 69.779614][ T3639] invalidate_bh_lrus+0x2a/0x30 [ 69.779641][ T3639] invalidate_bdev+0x42/0x70 [ 69.779673][ T3639] ext4_fill_super+0x2ccb/0x37b0 [ 69.779703][ T3639] get_tree_bdev_flags+0x291/0x300 [ 69.779739][ T3639] get_tree_bdev+0x1f/0x30 [ 69.779769][ T3639] ext4_get_tree+0x1c/0x30 [ 69.779803][ T3639] vfs_get_tree+0x57/0x1d0 [ 69.779833][ T3639] do_new_mount+0x288/0x8d0 [ 69.779851][ T3639] path_mount+0x4ad/0xb90 [ 69.779885][ T3639] __se_sys_mount+0x28c/0x2e0 [ 69.779904][ T3639] __x64_sys_mount+0x67/0x80 [ 69.779922][ T3639] x64_sys_call+0xc3b/0x2550 [ 69.779949][ T3639] do_syscall_64+0x112/0x360 [ 69.779969][ T3639] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 69.779991][ T3639] [ 69.779997][ T3639] read to 0xffff888237c277e0 of 8 bytes by task 3639 on cpu 1: [ 69.780014][ T3639] has_bh_in_lru+0x35/0x1f0 [ 69.780041][ T3639] __lru_add_drain_all+0x2c1/0x520 [ 69.780069][ T3639] lru_cache_disable+0x1f/0x30 [ 69.780097][ T3639] __se_sys_mbind+0x6cd/0xdd0 [ 69.780116][ T3639] __x64_sys_mbind+0x78/0x90 [ 69.780134][ T3639] x64_sys_call+0x1d78/0x2550 [ 69.780160][ T3639] do_syscall_64+0x112/0x360 [ 69.780180][ T3639] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 69.780202][ T3639] [ 69.780206][ T3639] value changed: 0xffff88810593bea0 -> 0x0000000000000000 [ 69.780218][ T3639] [ 69.780222][ T3639] Reported by Kernel Concurrency Sanitizer on: [ 69.780244][ T3639] CPU: 1 UID: 0 PID: 3639 Comm: syz-executor636 Not tainted syzkaller #0 PREEMPT(lazy) [ 69.780271][ T3639] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 69.780284][ T3639] ==================================================================