./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1098732408 <...> forked to background, child pid [ 21.974873][ T4665] dhcpcd (4665) used greatest stack depth: 22288 bytes left 4667 [ 21.992887][ T4668] 8021q: adding VLAN 0 to HW filter on device bond0 [ 22.007205][ T4668] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.96' (ECDSA) to the list of known hosts. execve("./syz-executor1098732408", ["./syz-executor1098732408"], 0x7ffd7af3b860 /* 10 vars */) = 0 brk(NULL) = 0x555555927000 brk(0x555555927c40) = 0x555555927c40 arch_prctl(ARCH_SET_FS, 0x555555927300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1098732408", 4096) = 28 brk(0x555555948c40) = 0x555555948c40 brk(0x555555949000) = 0x555555949000 mprotect(0x7fc145db7000, 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 getpid() = 4998 openat(AT_FDCWD, "/sys/kernel/debug/x86/nmi_longest_ns", O_WRONLY|O_CLOEXEC) = 3 write(3, "10000000000", 11) = 11 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/hung_task_check_interval_secs", O_WRONLY|O_CLOEXEC) = 3 write(3, "20", 2) = 2 close(3) = 0 openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_kallsyms", O_WRONLY|O_CLOEXEC) = 3 write(3, "1", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_harden", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/kptr_restrict", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/softlockup_all_cpu_backtrace", O_WRONLY|O_CLOEXEC) = 3 write(3, "1", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3 write(3, "100", 3) = 3 close(3) = 0 openat(AT_FDCWD, "/proc/sys/vm/oom_dump_tasks", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/debug/exception-trace", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/printk", O_WRONLY|O_CLOEXEC) = 3 write(3, "7 4 1 3", 7) = 7 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/keys/gc_delay", O_WRONLY|O_CLOEXEC) = 3 write(3, "1", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/vm/oom_kill_allocating_task", O_WRONLY|O_CLOEXEC) = 3 write(3, "1", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/ctrl-alt-del", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/cad_pid", O_WRONLY|O_CLOEXEC) = 3 write(3, "4998", 4) = 4 close(3) = 0 mount(NULL, "/proc/sys/fs/binfmt_misc", "binfmt_misc", 0, NULL) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "/proc/sys/fs/binfmt_misc/register", O_WRONLY|O_CLOEXEC) = 3 write(3, "\x3a\x73\x79\x7a\x30\x3a\x4d\x3a\x30\x3a\x01\x3a\x3a\x2e\x2f\x66\x69\x6c\x65\x30\x3a", 21) = 21 close(3) = 0 openat(AT_FDCWD, "/proc/sys/fs/binfmt_misc/register", O_WRONLY|O_CLOEXEC) = 3 write(3, "\x3a\x73\x79\x7a\x31\x3a\x4d\x3a\x31\x3a\x02\x3a\x3a\x2e\x2f\x66\x69\x6c\x65\x30\x3a\x50\x4f\x43", 24) = 24 close(3) = 0 chmod("/dev/raw-gadget", 0666) = 0 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555559275d0) = 4999 ./strace-static-x86_64: Process 4999 attached [pid 4999] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 4999] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 4999] setsid() = 1 [pid 4999] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 4999] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 4999] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 4999] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 4999] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 4999] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 4999] unshare(CLONE_NEWNS) = 0 [pid 4999] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 4999] unshare(CLONE_NEWIPC) = 0 [pid 4999] unshare(CLONE_NEWCGROUP) = 0 [pid 4999] unshare(CLONE_NEWUTS) = 0 [pid 4999] unshare(CLONE_SYSVSEM) = 0 [pid 4999] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 4999] write(3, "16777216", 8) = 8 [pid 4999] close(3) = 0 [pid 4999] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 4999] write(3, "536870912", 9) = 9 [pid 4999] close(3) = 0 [pid 4999] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 4999] write(3, "1024", 4) = 4 [pid 4999] close(3) = 0 [pid 4999] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 4999] write(3, "8192", 4) = 4 [pid 4999] close(3) = 0 [pid 4999] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 4999] write(3, "1024", 4) = 4 [pid 4999] close(3) = 0 [pid 4999] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 4999] write(3, "1024", 4) = 4 [pid 4999] close(3) = 0 [pid 4999] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 4999] write(3, "1024 1048576 500 1024", 21) = 21 [pid 4999] close(3) = 0 [pid 4999] getpid() = 1 [pid 4999] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [ 46.088638][ T4999] dump_stack_lvl+0xd9/0x150 [ 46.093223][ T4999] print_address_description.constprop.0+0x2c/0x3c0 [ 46.099805][ T4999] ? crc_itu_t+0xd2/0xe0 [ 46.104041][ T4999] kasan_report+0x11c/0x130 [ 46.108538][ T4999] ? crc_itu_t+0xd2/0xe0 [ 46.112774][ T4999] crc_itu_t+0xd2/0xe0 [ 46.116829][ T4999] udf_finalize_lvid+0xe0/0x1d0 [ 46.121669][ T4999] ? udf_mount+0x40/0x40 [ 46.125898][ T4999] udf_sync_fs+0xea/0x150 [ 46.130210][ T4999] ? udf_finalize_lvid+0x1d0/0x1d0 [ 46.135303][ T4999] sync_filesystem.part.0+0x75/0x1d0 [ 46.140570][ T4999] sync_filesystem+0x8f/0xc0 [ 46.145146][ T4999] generic_shutdown_super+0x74/0x480 [ 46.150417][ T4999] kill_block_super+0xa1/0x100 [ 46.155165][ T4999] deactivate_locked_super+0x98/0x160 [ 46.160524][ T4999] deactivate_super+0xb1/0xd0 [ 46.165186][ T4999] cleanup_mnt+0x2ae/0x3d0 [ 46.169587][ T4999] task_work_run+0x16f/0x270 [ 46.174171][ T4999] ? task_work_cancel+0x30/0x30 [ 46.179006][ T4999] do_exit+0xaa3/0x29b0 [ 46.183150][ T4999] ? lock_downgrade+0x690/0x690 [ 46.187987][ T4999] ? do_raw_spin_lock+0x124/0x2b0 [ 46.193000][ T4999] ? mm_update_next_owner+0x7b0/0x7b0 [ 46.198353][ T4999] ? spin_bug+0x1c0/0x1c0 [ 46.202669][ T4999] ? _raw_spin_unlock_irq+0x23/0x50 [ 46.207857][ T4999] do_group_exit+0xd4/0x2a0 [ 46.212348][ T4999] __x64_sys_exit_group+0x3e/0x50 [ 46.217356][ T4999] do_syscall_64+0x39/0xb0 [ 46.221767][ T4999] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 46.227654][ T4999] RIP: 0033:0x7fc145d2d4f9 [ 46.232050][ T4999] Code: Unable to access opcode bytes at 0x7fc145d2d4cf. [ 46.239045][ T4999] RSP: 002b:00007ffe93264168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 46.247439][ T4999] RAX: ffffffffffffffda RBX: 00007fc145dbd3f0 RCX: 00007fc145d2d4f9 [ 46.255397][ T4999] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 46.263357][ T4999] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 000000000000000c [ 46.271308][ T4999] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc145dbd3f0 [ 46.279260][ T4999] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 46.287217][ T4999] [ 46.290215][ T4999] [ 46.292516][ T4999] The buggy address belongs to the physical page: [ 46.298905][ T4999] page:ffffea0001cc1000 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x73040 [ 46.309034][ T4999] flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) [ 46.316121][ T4999] page_type: 0xffffffff() [ 46.320432][ T4999] raw: 00fff00000000000 ffffea0001cef888 ffffea0001cf6f88 0000000000000000 [ 46.329008][ T4999] raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 [ 46.337600][ T4999] page dumped because: kasan: bad access detected [ 46.343987][ T4999] page_owner tracks the page as freed [ 46.349333][ T4999] page last allocated via order 0, migratetype Movable, gfp_mask 0x140dca(GFP_HIGHUSER_MOVABLE|__GFP_COMP|__GFP_ZERO), pid 4984, tgid 4984 (sshd), ts 38671612077, free_ts 38696003148 [ 46.367287][ T4999] post_alloc_hook+0x2db/0x350 [ 46.372043][ T4999] get_page_from_freelist+0xf41/0x2c00 [ 46.377492][ T4999] __alloc_pages+0x1cb/0x4a0 [ 46.382072][ T4999] __folio_alloc+0x16/0x40 [ 46.386479][ T4999] vma_alloc_folio+0x155/0x890 [ 46.391232][ T4999] __handle_mm_fault+0x224c/0x41c0 [ 46.396326][ T4999] handle_mm_fault+0x2af/0x9f0 [ 46.401070][ T4999] do_user_addr_fault+0x2ca/0x1210 [ 46.406166][ T4999] exc_page_fault+0x98/0x170 [ 46.410743][ T4999] asm_exc_page_fault+0x26/0x30 [ 46.415582][ T4999] page last free stack trace: [ 46.420232][ T4999] free_unref_page_prepare+0x62e/0xcb0 [ 46.425681][ T4999] free_unref_page_list+0xe3/0xa70 [ 46.430783][ T4999] release_pages+0xcd8/0x1380 [ 46.435451][ T4999] tlb_batch_pages_flush+0xa8/0x1a0 [ 46.440639][ T4999] tlb_finish_mmu+0x14b/0x7e0 [ 46.445303][ T4999] unmap_region+0x23d/0x2d0 [ 46.449788][ T4999] do_vmi_align_munmap+0xe26/0x1580 [ 46.454971][ T4999] do_vmi_munmap+0x26e/0x2c0 [ 46.459550][ T4999] __vm_munmap+0x133/0x3b0 [ 46.463949][ T4999] __x64_sys_munmap+0x62/0x80 [ 46.468613][ T4999] do_syscall_64+0x39/0xb0 [ 46.473017][ T4999] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 46.478899][ T4999] [ 46.481204][ T4999] Memory state around the buggy address: [ 46.486813][ T4999] ffff88807303ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.494878][ T4999] ffff88807303ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.502934][ T4999] >ffff888073040000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 46.510976][ T4999] ^ [ 46.515020][ T4999] ffff888073040080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 46.523058][ T4999] ffff888073040100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 46.531101][ T4999] ================================================================== [ 46.541458][ T4999] Kernel panic - not syncing: KASAN: panic_on_warn set ... [ 46.548646][ T4999] CPU: 0 PID: 4999 Comm: syz-executor109 Not tainted 6.4.0-rc6-syzkaller-00037-gb6dad5178cea #0 [ 46.559041][ T4999] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 [ 46.569079][ T4999] Call Trace: [ 46.572339][ T4999] [ 46.575253][ T4999] dump_stack_lvl+0xd9/0x150 [ 46.579831][ T4999] panic+0x686/0x730 [ 46.583715][ T4999] ? panic_smp_self_stop+0xa0/0xa0 [ 46.588819][ T4999] ? preempt_schedule_thunk+0x1a/0x20 [ 46.594183][ T4999] ? preempt_schedule_common+0x45/0xb0 [ 46.599630][ T4999] check_panic_on_warn+0xb1/0xc0 [ 46.604564][ T4999] end_report+0xe9/0x120 [ 46.608797][ T4999] ? crc_itu_t+0xd2/0xe0 [ 46.613032][ T4999] kasan_report+0xf9/0x130 [ 46.617442][ T4999] ? crc_itu_t+0xd2/0xe0 [ 46.621672][ T4999] crc_itu_t+0xd2/0xe0 [ 46.625730][ T4999] udf_finalize_lvid+0xe0/0x1d0 [ 46.630566][ T4999] ? udf_mount+0x40/0x40 [ 46.634789][ T4999] udf_sync_fs+0xea/0x150 [ 46.639101][ T4999] ? udf_finalize_lvid+0x1d0/0x1d0 [ 46.644198][ T4999] sync_filesystem.part.0+0x75/0x1d0 [ 46.649468][ T4999] sync_filesystem+0x8f/0xc0 [ 46.654039][ T4999] generic_shutdown_super+0x74/0x480 [ 46.659311][ T4999] kill_block_super+0xa1/0x100 [ 46.664062][ T4999] deactivate_locked_super+0x98/0x160 [ 46.669423][ T4999] deactivate_super+0xb1/0xd0 [ 46.674083][ T4999] cleanup_mnt+0x2ae/0x3d0 [ 46.678482][ T4999] task_work_run+0x16f/0x270 [ 46.683055][ T4999] ? task_work_cancel+0x30/0x30 [ 46.687892][ T4999] do_exit+0xaa3/0x29b0 [ 46.692032][ T4999] ? lock_downgrade+0x690/0x690 [ 46.696869][ T4999] ? do_raw_spin_lock+0x124/0x2b0 [ 46.701882][ T4999] ? mm_update_next_owner+0x7b0/0x7b0 [ 46.707238][ T4999] ? spin_bug+0x1c0/0x1c0 [ 46.711559][ T4999] ? _raw_spin_unlock_irq+0x23/0x50 [ 46.716750][ T4999] do_group_exit+0xd4/0x2a0 [ 46.721235][ T4999] __x64_sys_exit_group+0x3e/0x50 [ 46.726243][ T4999] do_syscall_64+0x39/0xb0 [ 46.730667][ T4999] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 46.736552][ T4999] RIP: 0033:0x7fc145d2d4f9 [ 46.740945][ T4999] Code: Unable to access opcode bytes at 0x7fc145d2d4cf. [ 46.747942][ T4999] RSP: 002b:00007ffe93264168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 46.756338][ T4999] RAX: ffffffffffffffda RBX: 00007fc145dbd3f0 RCX: 00007fc145d2d4f9 [ 46.764290][ T4999] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 46.772240][ T4999] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 000000000000000c [ 46.780192][ T4999] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc145dbd3f0 [ 46.788149][ T4999] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 46.796108][ T4999] [ 46.800052][ T4999] Kernel Offset: disabled [ 46.804361][ T4999] Rebooting in 86400 seconds..