./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2766425688 <...> forked to background, child pid 4699 [ 110.007564][ T4700] 8021q: adding VLAN 0 to HW filter on device bond0 [ 110.053058][ T4700] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: [ 111.594322][ T43] cfg80211: failed to load regulatory.db OK syzkaller Warning: Permanently added '10.128.1.203' (ED25519) to the list of known hosts. execve("./syz-executor2766425688", ["./syz-executor2766425688"], 0x7fffe7cf69d0 /* 10 vars */) = 0 brk(NULL) = 0x555567b39000 brk(0x555567b39d00) = 0x555567b39d00 arch_prctl(ARCH_SET_FS, 0x555567b39380) = 0 set_tid_address(0x555567b39650) = 5045 set_robust_list(0x555567b39660, 24) = 0 rseq(0x555567b39ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2766425688", 4096) = 28 getrandom("\xf4\x53\xcb\x64\x63\x32\x53\x04", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555567b39d00 brk(0x555567b5ad00) = 0x555567b5ad00 brk(0x555567b5b000) = 0x555567b5b000 mprotect(0x7f2c58653000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5046 attached , child_tidptr=0x555567b39650) = 5046 [pid 5046] set_robust_list(0x555567b39660, 24) = 0 [pid 5046] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5046] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5046] setsid() = 1 [pid 5046] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5046] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5046] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5046] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5046] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5046] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5046] unshare(CLONE_NEWNS) = 0 [pid 5046] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5046] unshare(CLONE_NEWIPC) = 0 [pid 5046] unshare(CLONE_NEWCGROUP) = 0 [pid 5046] unshare(CLONE_NEWUTS) = 0 [pid 5046] unshare(CLONE_SYSVSEM) = 0 [pid 5046] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5046] write(3, "16777216", 8) = 8 [pid 5046] close(3) = 0 [pid 5046] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5046] write(3, "536870912", 9) = 9 [pid 5046] close(3) = 0 [pid 5046] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5046] write(3, "1024", 4) = 4 [pid 5046] close(3) = 0 [pid 5046] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5046] write(3, "8192", 4) = 4 [pid 5046] close(3) = 0 [pid 5046] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5046] write(3, "1024", 4) = 4 [pid 5046] close(3) = 0 [pid 5046] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5046] write(3, "1024", 4) = 4 [pid 5046] close(3) = 0 [pid 5046] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5046] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5046] close(3) = 0 [pid 5046] getpid() = 1 [pid 5046] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<) = 0 [pid 5046] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5051 attached , child_tidptr=0x555567b39650) = 4 [pid 5051] set_robust_list(0x555567b39660, 24) = 0 [pid 5051] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5051] setpgid(0, 0) = 0 [pid 5051] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 executing program [pid 5051] write(3, "1000", 4) = 4 [pid 5051] close(3) = 0 [pid 5051] write(1, "executing program\n", 18) = 18 [pid 5051] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_SYNC|O_NOATIME|FASYNC, 000) = 3 [pid 5051] pwrite64(3, "_", 1, 1099511627781) = -1 EFBIG (File too large) [pid 5051] --- SIGXFSZ {si_signo=SIGXFSZ, si_code=SI_USER, si_pid=4, si_uid=0} --- [pid 5051] +++ killed by SIGXFSZ (core dumped) +++ [pid 5046] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_DUMPED, si_pid=4, si_uid=0, si_status=SIGXFSZ, si_utime=0, si_stime=19 /* 0.19 s */} --- [pid 5046] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5052 attached , child_tidptr=0x555567b39650) = 5 [pid 5052] set_robust_list(0x555567b39660, 24) = 0 [pid 5052] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5052] setpgid(0, 0) = 0 [pid 5052] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5052] write(3, "1000", 4) = 4 [pid 5052] close(3executing program ) = 0 [pid 5052] write(1, "executing program\n", 18) = 18 [pid 5052] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_SYNC|O_NOATIME|FASYNC, 000) = 3 [pid 5052] pwrite64(3, "_", 1, 1099511627781) = -1 EFBIG (File too large) [pid 5052] --- SIGXFSZ {si_signo=SIGXFSZ, si_code=SI_USER, si_pid=5, si_uid=0} --- syzkaller login: [ 163.520399][ T1111] ===================================================== [ 163.527840][ T1111] BUG: KMSAN: uninit-value in virtqueue_add+0x1e86/0x65c0 [ 163.535147][ T1111] virtqueue_add+0x1e86/0x65c0 [ 163.540089][ T1111] virtqueue_add_sgs+0x186/0x1b0 [ 163.545202][ T1111] virtscsi_add_cmd+0x838/0xad0 [ 163.550218][ T1111] virtscsi_queuecommand+0x898/0xa60 [ 163.555705][ T1111] scsi_queue_rq+0x4cc7/0x5a80 [ 163.560662][ T1111] blk_mq_dispatch_rq_list+0x79b/0x3440 [ 163.566434][ T1111] __blk_mq_sched_dispatch_requests+0x11b7/0x26e0 [ 163.573066][ T1111] blk_mq_sched_dispatch_requests+0x12f/0x270 [ 163.579351][ T1111] blk_mq_run_work_fn+0xd0/0x280 [ 163.584462][ T1111] process_scheduled_works+0xa81/0x1bd0 [ 163.590221][ T1111] worker_thread+0xea5/0x1560 [ 163.595146][ T1111] kthread+0x3e2/0x540 [ 163.599407][ T1111] ret_from_fork+0x6d/0x90 [ 163.604024][ T1111] ret_from_fork_asm+0x1a/0x30 [ 163.608981][ T1111] [ 163.611387][ T1111] Uninit was stored to memory at: [ 163.616743][ T1111] copy_page_from_iter_atomic+0x12b7/0x2ae0 [ 163.622847][ T1111] generic_perform_write+0x4c1/0xc60 [ 163.628338][ T1111] ext4_buffered_write_iter+0x564/0xaa0 [ 163.634056][ T1111] ext4_file_write_iter+0x208/0x3450 [ 163.639497][ T1111] __kernel_write_iter+0x64d/0xc80 [ 163.644840][ T1111] dump_user_range+0x8dc/0xee0 [ 163.649784][ T1111] elf_core_dump+0x57c7/0x5ae0 [ 163.654732][ T1111] do_coredump+0x32d5/0x4920 [ 163.659496][ T1111] get_signal+0x267e/0x2d00 [ 163.664164][ T1111] arch_do_signal_or_restart+0x53/0xcb0 [ 163.669940][ T1111] syscall_exit_to_user_mode+0x5d/0x160 [ 163.675685][ T1111] do_syscall_64+0xdc/0x1e0 [ 163.680367][ T1111] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 163.686537][ T1111] [ 163.688958][ T1111] Uninit was created at: [ 163.693435][ T1111] __alloc_pages+0x9d6/0xe70 [ 163.698200][ T1111] alloc_pages_mpol+0x299/0x990 [ 163.703308][ T1111] alloc_pages+0x1bf/0x1e0 [ 163.707886][ T1111] dump_user_range+0x4a/0xee0 [ 163.712744][ T1111] elf_core_dump+0x57c7/0x5ae0 [ 163.717701][ T1111] do_coredump+0x32d5/0x4920 [ 163.722455][ T1111] get_signal+0x267e/0x2d00 [ 163.727126][ T1111] arch_do_signal_or_restart+0x53/0xcb0 [ 163.732891][ T1111] syscall_exit_to_user_mode+0x5d/0x160 [ 163.738625][ T1111] do_syscall_64+0xdc/0x1e0 [ 163.743318][ T1111] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 163.749427][ T1111] [ 163.751845][ T1111] Bytes 0-4095 of 4096 are uninitialized [ 163.757587][ T1111] Memory access of size 4096 starts at ffff888127495000 [ 163.764657][ T1111] [ 163.767080][ T1111] CPU: 0 PID: 1111 Comm: kworker/0:1H Not tainted 6.9.0-syzkaller-02707-g614da38e2f7a #0 [ 163.777047][ T1111] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 163.787245][ T1111] Workqueue: kblockd blk_mq_run_work_fn [ 163.793030][ T1111] ===================================================== [ 163.800087][ T1111] Disabling lock debugging due to kernel taint [ 163.806437][ T1111] Kernel panic - not syncing: kmsan.panic set ... [ 163.812979][ T1111] CPU: 0 PID: 1111 Comm: kworker/0:1H Tainted: G B 6.9.0-syzkaller-02707-g614da38e2f7a #0 [ 163.824442][ T1111] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 163.834702][ T1111] Workqueue: kblockd blk_mq_run_work_fn [ 163.840457][ T1111] Call Trace: [ 163.843965][ T1111] [ 163.846992][ T1111] dump_stack_lvl+0x216/0x2d0 [ 163.851873][ T1111] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 163.857890][ T1111] dump_stack+0x1e/0x30 [ 163.862267][ T1111] panic+0x4e2/0xcd0 [ 163.866371][ T1111] ? kmsan_get_metadata+0xf1/0x1d0 [ 163.871680][ T1111] kmsan_report+0x2d5/0x2e0 [ 163.876376][ T1111] ? kmsan_get_metadata+0x146/0x1d0 [ 163.881820][ T1111] ? kmsan_internal_set_shadow_origin+0x66/0xe0 [ 163.888289][ T1111] ? kmsan_internal_check_memory+0x48c/0x560 [ 163.894542][ T1111] ? kmsan_handle_dma+0xac/0xc0 [ 163.899547][ T1111] ? virtqueue_add+0x1e86/0x65c0 [ 163.904668][ T1111] ? virtqueue_add_sgs+0x186/0x1b0 [ 163.909964][ T1111] ? virtscsi_add_cmd+0x838/0xad0 [ 163.915255][ T1111] ? virtscsi_queuecommand+0x898/0xa60 [ 163.920977][ T1111] ? scsi_queue_rq+0x4cc7/0x5a80 [ 163.926082][ T1111] ? blk_mq_dispatch_rq_list+0x79b/0x3440 [ 163.932013][ T1111] ? __blk_mq_sched_dispatch_requests+0x11b7/0x26e0 [ 163.939009][ T1111] ? blk_mq_sched_dispatch_requests+0x12f/0x270 [ 163.945490][ T1111] ? blk_mq_run_work_fn+0xd0/0x280 [ 163.950803][ T1111] ? process_scheduled_works+0xa81/0x1bd0 [ 163.956735][ T1111] ? worker_thread+0xea5/0x1560 [ 163.961774][ T1111] ? kthread+0x3e2/0x540 [ 163.966288][ T1111] ? ret_from_fork+0x6d/0x90 [ 163.971059][ T1111] ? ret_from_fork_asm+0x1a/0x30 [ 163.976279][ T1111] ? scsi_queue_rq+0x4335/0x5a80 [ 163.981389][ T1111] ? blk_mq_dispatch_rq_list+0x79b/0x3440 [ 163.987322][ T1111] ? __blk_mq_sched_dispatch_requests+0x11b7/0x26e0 [ 163.994129][ T1111] ? blk_mq_sched_dispatch_requests+0x12f/0x270 [ 164.000581][ T1111] ? blk_mq_run_work_fn+0xd0/0x280 [ 164.005873][ T1111] ? process_scheduled_works+0xa81/0x1bd0 [ 164.011783][ T1111] ? worker_thread+0xea5/0x1560 [ 164.016807][ T1111] ? kthread+0x3e2/0x540 [ 164.021227][ T1111] ? ret_from_fork+0x6d/0x90 [ 164.025976][ T1111] ? ret_from_fork_asm+0x1a/0x30 [ 164.031100][ T1111] ? kmsan_get_metadata+0x146/0x1d0 [ 164.036466][ T1111] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 164.042448][ T1111] ? kmsan_get_metadata+0x146/0x1d0 [ 164.047853][ T1111] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 164.053878][ T1111] ? should_fail_ex+0x4a/0x800 [ 164.058827][ T1111] ? kmsan_get_metadata+0x146/0x1d0 [ 164.064197][ T1111] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 164.070182][ T1111] ? kmsan_get_metadata+0x146/0x1d0 [ 164.075550][ T1111] kmsan_internal_check_memory+0x48c/0x560 [ 164.081587][ T1111] kmsan_handle_dma+0xac/0xc0 [ 164.086426][ T1111] virtqueue_add+0x1e86/0x65c0 [ 164.091380][ T1111] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 164.097444][ T1111] ? kmsan_get_metadata+0x146/0x1d0 [ 164.102811][ T1111] ? kmsan_get_metadata+0x146/0x1d0 [ 164.108189][ T1111] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 164.114208][ T1111] virtqueue_add_sgs+0x186/0x1b0 [ 164.119347][ T1111] virtscsi_add_cmd+0x838/0xad0 [ 164.124443][ T1111] virtscsi_queuecommand+0x898/0xa60 [ 164.129927][ T1111] ? __pfx_virtscsi_queuecommand+0x10/0x10 [ 164.135940][ T1111] scsi_queue_rq+0x4cc7/0x5a80 [ 164.140952][ T1111] ? __pfx_scsi_queue_rq+0x10/0x10 [ 164.146343][ T1111] blk_mq_dispatch_rq_list+0x79b/0x3440 [ 164.152209][ T1111] ? sbitmap_get+0x431/0x670 [ 164.156980][ T1111] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 164.162986][ T1111] ? dd_dispatch_request+0x9a1/0xa20 [ 164.168472][ T1111] __blk_mq_sched_dispatch_requests+0x11b7/0x26e0 [ 164.175122][ T1111] ? finish_task_switch+0x1c8/0x8f0 [ 164.180528][ T1111] ? __blk_mq_sched_dispatch_requests+0x1031/0x26e0 [ 164.187349][ T1111] blk_mq_sched_dispatch_requests+0x12f/0x270 [ 164.193674][ T1111] blk_mq_run_work_fn+0xd0/0x280 [ 164.198823][ T1111] ? __pfx_blk_mq_run_work_fn+0x10/0x10 [ 164.204558][ T1111] process_scheduled_works+0xa81/0x1bd0 [ 164.210336][ T1111] worker_thread+0xea5/0x1560 [ 164.215199][ T1111] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 164.221236][ T1111] kthread+0x3e2/0x540 [ 164.225490][ T1111] ? __pfx_worker_thread+0x10/0x10 [ 164.230795][ T1111] ? __pfx_kthread+0x10/0x10 [ 164.235569][ T1111] ret_from_fork+0x6d/0x90 [ 164.240240][ T1111] ? __pfx_kthread+0x10/0x10 [ 164.245022][ T1111] ret_from_fork_asm+0x1a/0x30 [ 164.249993][ T1111] [ 165.658750][ T1111] Shutting down cpus with NMI [ 165.663688][ T1111] Kernel Offset: disabled [ 165.668287][ T1111] Rebooting in 86400 seconds..