./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3696938086 <...> Warning: Permanently added '10.128.0.118' (ED25519) to the list of known hosts. execve("./syz-executor3696938086", ["./syz-executor3696938086"], 0x7ffc133012d0 /* 10 vars */) = 0 brk(NULL) = 0x555557398000 brk(0x555557398d00) = 0x555557398d00 arch_prctl(ARCH_SET_FS, 0x555557398380) = 0 set_tid_address(0x555557398650) = 5007 set_robust_list(0x555557398660, 24) = 0 rseq(0x555557398ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3696938086", 4096) = 28 getrandom("\x3d\x73\x1b\xf7\x96\x72\xe8\xe0", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555557398d00 brk(0x5555573b9d00) = 0x5555573b9d00 brk(0x5555573ba000) = 0x5555573ba000 mprotect(0x7f75a9290000, 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, child_tidptr=0x555557398650) = 5008 ./strace-static-x86_64: Process 5008 attached [pid 5008] set_robust_list(0x555557398660, 24) = 0 [pid 5008] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5008] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5008] setsid() = 1 [pid 5008] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5008] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5008] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5008] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5008] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5008] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5008] unshare(CLONE_NEWNS) = 0 [pid 5008] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5008] unshare(CLONE_NEWIPC) = 0 [pid 5008] unshare(CLONE_NEWCGROUP) = 0 [pid 5008] unshare(CLONE_NEWUTS) = 0 [pid 5008] unshare(CLONE_SYSVSEM) = 0 [pid 5008] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5008] write(3, "16777216", 8) = 8 [pid 5008] close(3) = 0 [pid 5008] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5008] write(3, "536870912", 9) = 9 [pid 5008] close(3) = 0 [pid 5008] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5008] write(3, "1024", 4) = 4 [pid 5008] close(3) = 0 [pid 5008] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5008] write(3, "8192", 4) = 4 [pid 5008] close(3) = 0 [pid 5008] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5008] write(3, "1024", 4) = 4 [pid 5008] close(3) = 0 [pid 5008] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5008] write(3, "1024", 4) = 4 [pid 5008] close(3) = 0 [pid 5008] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5008] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5008] close(3) = 0 [pid 5008] getpid() = 1 [pid 5008] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [pid 5012] --- SIGBUS {si_signo=SIGBUS, si_code=SI_KERNEL, si_addr=NULL} --- [pid 5011] <... clone3 resumed>) = 3 [pid 5011] close(3) = -1 EBADF (Bad file descriptor) [pid 5011] close(4) = -1 EBADF (Bad file descriptor) [pid 5011] close(5) = -1 EBADF (Bad file descriptor) [pid 5011] close(6) = -1 EBADF (Bad file descriptor) [pid 5011] close(7) = -1 EBADF (Bad file descriptor) [pid 5011] close(8) = -1 EBADF (Bad file descriptor) [pid 5011] close(9) = -1 EBADF (Bad file descriptor) [pid 5011] close(10) = -1 EBADF (Bad file descriptor) [pid 5011] close(11) = -1 EBADF (Bad file descriptor) [pid 5011] close(12) = -1 EBADF (Bad file descriptor) [pid 5011] close(13) = -1 EBADF (Bad file descriptor) [pid 5011] close(14) = -1 EBADF (Bad file descriptor) [pid 5011] close(15) = -1 EBADF (Bad file descriptor) [pid 5011] close(16) = -1 EBADF (Bad file descriptor) [pid 5011] close(17) = -1 EBADF (Bad file descriptor) [pid 5011] close(18) = -1 EBADF (Bad file descriptor) [pid 5011] close(19) = -1 EBADF (Bad file descriptor) [pid 5011] close(20) = -1 EBADF (Bad file descriptor) [pid 5011] close(21) = -1 EBADF (Bad file descriptor) [pid 5011] close(22) = -1 EBADF (Bad file descriptor) [pid 5011] close(23) = -1 EBADF (Bad file descriptor) [pid 5011] close(24) = -1 EBADF (Bad file descriptor) [pid 5011] close(25) = -1 EBADF (Bad file descriptor) [pid 5011] close(26) = -1 EBADF (Bad file descriptor) [pid 5011] close(27) = -1 EBADF (Bad file descriptor) [pid 5011] close(28) = -1 EBADF (Bad file descriptor) [pid 5011] close(29) = -1 EBADF (Bad file descriptor) [pid 5011] exit_group(0) = ? [pid 5011] +++ exited with 0 +++ [pid 5008] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- [pid 5008] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 5008] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5013 attached [pid 5013] set_robust_list(0x555557398660, 24) = 0 [pid 5013] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5008] <... clone resumed>, child_tidptr=0x555557398650) = 4 [pid 5013] <... prctl resumed>) = 0 [pid 5013] setpgid(0, 0) = 0 [pid 5013] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5013] write(3, "1000", 4) = 4 [pid 5013] close(3) = 0 [pid 5013] clone3({flags=0, exit_signal=0, stack=0x20001a00, stack_size=0x8000001000000, cgroup=4294967295}, 88./strace-static-x86_64: Process 5014 attached [pid 5014] --- SIGBUS {si_signo=SIGBUS, si_code=SI_KERNEL, si_addr=NULL} --- [pid 5013] <... clone3 resumed>) = 5 [pid 5013] close(3) = -1 EBADF (Bad file descriptor) [pid 5013] close(4) = -1 EBADF (Bad file descriptor) [pid 5013] close(5) = -1 EBADF (Bad file descriptor) [pid 5013] close(6) = -1 EBADF (Bad file descriptor) [pid 5013] close(7) = -1 EBADF (Bad file descriptor) [pid 5013] close(8) = -1 EBADF (Bad file descriptor) [pid 5013] close(9) = -1 EBADF (Bad file descriptor) [pid 5013] close(10) = -1 EBADF (Bad file descriptor) [pid 5013] close(11) = -1 EBADF (Bad file descriptor) [pid 5013] close(12) = -1 EBADF (Bad file descriptor) [pid 5013] close(13) = -1 EBADF (Bad file descriptor) [pid 5013] close(14) = -1 EBADF (Bad file descriptor) [pid 5013] close(15) = -1 EBADF (Bad file descriptor) [pid 5013] close(16) = -1 EBADF (Bad file descriptor) [pid 5013] close(17) = -1 EBADF (Bad file descriptor) [pid 5013] close(18) = -1 EBADF (Bad file descriptor) [pid 5013] close(19) = -1 EBADF (Bad file descriptor) [pid 5013] close(20) = -1 EBADF (Bad file descriptor) [pid 5013] close(21) = -1 EBADF (Bad file descriptor) [pid 5013] close(22) = -1 EBADF (Bad file descriptor) [pid 5013] close(23) = -1 EBADF (Bad file descriptor) [pid 5013] close(24) = -1 EBADF (Bad file descriptor) [pid 5013] close(25) = -1 EBADF (Bad file descriptor) [pid 5013] close(26) = -1 EBADF (Bad file descriptor) [pid 5013] close(27) = -1 EBADF (Bad file descriptor) [pid 5013] close(28) = -1 EBADF (Bad file descriptor) [pid 5013] close(29) = -1 EBADF (Bad file descriptor) [pid 5013] exit_group(0) = ? [pid 5013] +++ exited with 0 +++ [pid 5008] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=4, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 5008] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555557398650) = 6 ./strace-static-x86_64: Process 5015 attached [pid 5015] set_robust_list(0x555557398660, 24) = 0 [pid 5015] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5015] setpgid(0, 0) = 0 [pid 5015] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5015] write(3, "1000", 4) = 4 [pid 5015] close(3) = 0 [ 164.811869][ T52] ===================================================== [ 164.819491][ T52] BUG: KMSAN: uninit-value in virtqueue_add+0x21c6/0x6530 [ 164.826824][ T52] virtqueue_add+0x21c6/0x6530 [ 164.831821][ T52] virtqueue_add_sgs+0x186/0x1a0 [ 164.836985][ T52] virtscsi_add_cmd+0x838/0xad0 [ 164.842254][ T52] virtscsi_queuecommand+0x896/0xa60 [ 164.847785][ T52] scsi_queue_rq+0x4874/0x5790 [ 164.852778][ T52] blk_mq_dispatch_rq_list+0x13f8/0x3600 [pid 5015] clone3({flags=0, exit_signal=0, stack=0x20001a00, stack_size=0x8000001000000, cgroup=4294967295}, 88./strace-static-x86_64: Process 5016 attached [pid 5016] --- SIGBUS {si_signo=SIGBUS, si_code=SI_KERNEL, si_addr=NULL} --- [ 164.858676][ T52] __blk_mq_sched_dispatch_requests+0x10af/0x2500 [ 164.865357][ T52] blk_mq_sched_dispatch_requests+0x160/0x2d0 [ 164.871688][ T52] blk_mq_run_work_fn+0xd0/0x280 [ 164.876927][ T52] process_scheduled_works+0x104e/0x1e70 [ 164.882804][ T52] worker_thread+0xf45/0x1490 [ 164.887697][ T52] kthread+0x3ed/0x540 [ 164.891957][ T52] ret_from_fork+0x66/0x80 [ 164.896669][ T52] ret_from_fork_asm+0x11/0x20 [ 164.901612][ T52] [ 164.904202][ T52] Uninit was created at: [ 164.908694][ T52] __alloc_pages+0x9a4/0xe00 [ 164.913579][ T52] alloc_pages_mpol+0x62b/0x9d0 [ 164.918615][ T52] folio_alloc+0x1da/0x380 [ 164.923214][ T52] filemap_alloc_folio+0xa5/0x430 [ 164.928429][ T52] __filemap_get_folio+0xa5a/0x1760 [ 164.933825][ T52] ext4_da_write_begin+0x7f8/0xec0 [ 164.939507][ T52] generic_perform_write+0x3f5/0xc40 [ 164.945038][ T52] ext4_buffered_write_iter+0x564/0xaa0 [ 164.950762][ T52] ext4_file_write_iter+0x20f/0x3460 [ 164.956215][ T52] __kernel_write_iter+0x329/0x930 [ 164.961575][ T52] dump_user_range+0x593/0xcd0 [ 164.966866][ T52] elf_core_dump+0x528d/0x5a40 [ 164.971836][ T52] do_coredump+0x32c9/0x4920 [ 164.976602][ T52] get_signal+0x2185/0x2d10 [ 164.981381][ T52] arch_do_signal_or_restart+0x53/0xca0 [ 164.987191][ T52] irqentry_exit_to_user_mode+0xaa/0x160 [ 164.993015][ T52] irqentry_exit+0x16/0x40 [ 164.997846][ T52] exc_stack_segment+0x8a/0xa0 [ 165.002897][ T52] asm_exc_stack_segment+0x2b/0x30 [ 165.008234][ T52] [ 165.010680][ T52] Bytes 0-4095 of 4096 are uninitialized [ 165.016518][ T52] Memory access of size 4096 starts at ffff88812c7aa000 [ 165.023580][ T52] [ 165.025992][ T52] CPU: 0 PID: 52 Comm: kworker/0:1H Not tainted 6.7.0-syzkaller-00562-g9f8413c4a66f #0 [ 165.035789][ T52] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 165.046268][ T52] Workqueue: kblockd blk_mq_run_work_fn [ 165.051995][ T52] ===================================================== [ 165.059036][ T52] Disabling lock debugging due to kernel taint [ 165.065339][ T52] Kernel panic - not syncing: kmsan.panic set ... [ 165.071874][ T52] CPU: 0 PID: 52 Comm: kworker/0:1H Tainted: G B 6.7.0-syzkaller-00562-g9f8413c4a66f #0 [ 165.083429][ T52] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 165.093642][ T52] Workqueue: kblockd blk_mq_run_work_fn [ 165.099390][ T52] Call Trace: [ 165.102861][ T52] [ 165.105897][ T52] dump_stack_lvl+0x1bf/0x240 [ 165.110801][ T52] dump_stack+0x1e/0x20 [ 165.115485][ T52] panic+0x4de/0xc90 [ 165.119994][ T52] ? add_taint+0x108/0x1a0 [ 165.124595][ T52] kmsan_report+0x2d0/0x2d0 [ 165.129492][ T52] ? kmsan_internal_check_memory+0x476/0x530 [ 165.135722][ T52] ? kmsan_handle_dma+0xac/0xc0 [ 165.140898][ T52] ? virtqueue_add+0x21c6/0x6530 [ 165.146009][ T52] ? virtqueue_add_sgs+0x186/0x1a0 [ 165.151469][ T52] ? virtscsi_add_cmd+0x838/0xad0 [ 165.156799][ T52] ? virtscsi_queuecommand+0x896/0xa60 [ 165.162496][ T52] ? scsi_queue_rq+0x4874/0x5790 [ 165.167641][ T52] ? blk_mq_dispatch_rq_list+0x13f8/0x3600 [ 165.173677][ T52] ? __blk_mq_sched_dispatch_requests+0x10af/0x2500 [ 165.180647][ T52] ? blk_mq_sched_dispatch_requests+0x160/0x2d0 [ 165.187376][ T52] ? blk_mq_run_work_fn+0xd0/0x280 [ 165.192664][ T52] ? process_scheduled_works+0x104e/0x1e70 [ 165.198756][ T52] ? worker_thread+0xf45/0x1490 [ 165.203964][ T52] ? kthread+0x3ed/0x540 [ 165.208576][ T52] ? ret_from_fork+0x66/0x80 [ 165.213413][ T52] ? ret_from_fork_asm+0x11/0x20 [ 165.218557][ T52] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 165.225066][ T52] ? flat_send_IPI_mask+0x4b/0xd0 [ 165.230424][ T52] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 165.236602][ T52] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 165.242688][ T52] ? iowrite16+0x38/0x1d0 [ 165.247772][ T52] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 165.254230][ T52] ? iowrite16+0x38/0x1d0 [ 165.258792][ T52] kmsan_internal_check_memory+0x476/0x530 [ 165.264877][ T52] kmsan_handle_dma+0xac/0xc0 [ 165.269927][ T52] virtqueue_add+0x21c6/0x6530 [ 165.274914][ T52] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 165.281052][ T52] virtqueue_add_sgs+0x186/0x1a0 [ 165.286232][ T52] virtscsi_add_cmd+0x838/0xad0 [ 165.291809][ T52] virtscsi_queuecommand+0x896/0xa60 [ 165.297432][ T52] ? virtscsi_kick_event_all+0x3f0/0x3f0 [ 165.303281][ T52] scsi_queue_rq+0x4874/0x5790 [ 165.308310][ T52] ? scsi_complete+0x480/0x480 [ 165.313469][ T52] blk_mq_dispatch_rq_list+0x13f8/0x3600 [ 165.319398][ T52] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 165.325607][ T52] __blk_mq_sched_dispatch_requests+0x10af/0x2500 [ 165.332759][ T52] ? __blk_mq_sched_dispatch_requests+0xeb1/0x2500 [ 165.339630][ T52] blk_mq_sched_dispatch_requests+0x160/0x2d0 [ 165.345975][ T52] blk_mq_run_work_fn+0xd0/0x280 [ 165.351215][ T52] ? blk_mq_alloc_and_init_hctx+0x17c0/0x17c0 [ 165.357664][ T52] process_scheduled_works+0x104e/0x1e70 [ 165.363739][ T52] worker_thread+0xf45/0x1490 [ 165.368622][ T52] kthread+0x3ed/0x540 [ 165.372895][ T52] ? pr_cont_work+0xce0/0xce0 [ 165.377753][ T52] ? kthread_blkcg+0x120/0x120 [ 165.382838][ T52] ret_from_fork+0x66/0x80 [ 165.387512][ T52] ? kthread_blkcg+0x120/0x120 [ 165.392736][ T52] ret_from_fork_asm+0x11/0x20 [ 165.397819][ T52] [ 166.883732][ T52] Shutting down cpus with NMI [ 166.888818][ T52] Kernel Offset: disabled [ 166.893214][ T52] Rebooting in 86400 seconds..