./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3839025756 <...> forked to background, child pid 3186 no interfaces have a carrier [ 22.509405][ T3187] 8021q: adding VLAN 0 to HW filter on device bond0 [ 22.519011][ T3187] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.7' (ECDSA) to the list of known hosts. execve("./syz-executor3839025756", ["./syz-executor3839025756"], 0x7ffdb8478e30 /* 10 vars */) = 0 brk(NULL) = 0x555555bda000 brk(0x555555bdac40) = 0x555555bdac40 arch_prctl(ARCH_SET_FS, 0x555555bda300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor3839025756", 4096) = 28 brk(0x555555bfbc40) = 0x555555bfbc40 brk(0x555555bfc000) = 0x555555bfc000 mprotect(0x7f25d9158000, 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 3615 attached , child_tidptr=0x555555bda5d0) = 3615 [pid 3615] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 3615] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3615] setsid() = 1 [pid 3615] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 3615] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 3615] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 3615] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 3615] prlimit64(0, RLIMIT_CORE, {rlim_cur=0, rlim_max=0}, NULL) = 0 [pid 3615] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 3615] unshare(CLONE_NEWNS) = 0 [pid 3615] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 3615] unshare(CLONE_NEWIPC) = 0 [pid 3615] unshare(CLONE_NEWCGROUP) = 0 [pid 3615] unshare(CLONE_NEWUTS) = 0 [pid 3615] unshare(CLONE_SYSVSEM) = 0 [pid 3615] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3615] write(3, "16777216", 8) = 8 [pid 3615] close(3) = 0 [pid 3615] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 3615] write(3, "536870912", 9) = 9 [pid 3615] close(3) = 0 [pid 3615] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3615] write(3, "1024", 4) = 4 [pid 3615] close(3) = 0 [pid 3615] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3615] write(3, "8192", 4) = 4 [pid 3615] close(3) = 0 [pid 3615] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3615] write(3, "1024", 4) = 4 [pid 3615] close(3) = 0 [pid 3615] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 3615] write(3, "1024", 4) = 4 [pid 3615] close(3) = 0 [pid 3615] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 3615] write(3, "1024 1048576 500 1024", 21) = 21 [pid 3615] close(3) = 0 [pid 3615] getpid() = 1 [pid 3615] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [ 49.784364][ T3615] dump_stack_lvl+0xcd/0x134 [ 49.788952][ T3615] print_report.cold+0x2ba/0x719 [ 49.793884][ T3615] ? nilfs_segctor_confirm+0x175/0x190 [ 49.799362][ T3615] kasan_report+0xb1/0x1e0 [ 49.803776][ T3615] ? nilfs_segctor_confirm+0x175/0x190 [ 49.809232][ T3615] nilfs_segctor_confirm+0x175/0x190 [ 49.814517][ T3615] nilfs_detach_log_writer+0x856/0x9f0 [ 49.820254][ T3615] ? nilfs_clean_segments+0xa80/0xa80 [ 49.825624][ T3615] ? collect_domain_accesses+0xbf0/0xbf0 [ 49.831255][ T3615] ? __fsnotify_vfsmount_delete+0x20/0x20 [ 49.836969][ T3615] ? dispose_list+0x1e0/0x1e0 [ 49.841646][ T3615] nilfs_put_super+0x3f/0x1a0 [ 49.846491][ T3615] ? nilfs_freeze+0xc0/0xc0 [ 49.851006][ T3615] generic_shutdown_super+0x154/0x410 [ 49.856389][ T3615] kill_block_super+0x97/0xf0 [ 49.861062][ T3615] deactivate_locked_super+0x94/0x160 [ 49.866431][ T3615] deactivate_super+0xad/0xd0 [ 49.871120][ T3615] cleanup_mnt+0x2ae/0x3d0 [ 49.875530][ T3615] task_work_run+0xdd/0x1a0 [ 49.880034][ T3615] do_exit+0xad5/0x29b0 [ 49.884287][ T3615] ? mm_update_next_owner+0x7a0/0x7a0 [ 49.889927][ T3615] ? _raw_spin_unlock_irq+0x1f/0x40 [ 49.895220][ T3615] ? _raw_spin_unlock_irq+0x1f/0x40 [ 49.900422][ T3615] do_group_exit+0xd2/0x2f0 [ 49.904931][ T3615] __x64_sys_exit_group+0x3a/0x50 [ 49.909958][ T3615] do_syscall_64+0x35/0xb0 [ 49.914371][ T3615] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 49.920271][ T3615] RIP: 0033:0x7f25d90e6ba9 [ 49.924676][ T3615] Code: Unable to access opcode bytes at 0x7f25d90e6b7f. [ 49.931680][ T3615] RSP: 002b:00007ffe9fa16e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 49.940086][ T3615] RAX: ffffffffffffffda RBX: 00007f25d915e330 RCX: 00007f25d90e6ba9 [ 49.948050][ T3615] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 49.956013][ T3615] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007f25d9158e40 [ 49.964161][ T3615] R10: 00007f25d9158e40 R11: 0000000000000246 R12: 00007f25d915e330 [ 49.972127][ T3615] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 49.980104][ T3615] [ 49.983111][ T3615] [ 49.985417][ T3615] Allocated by task 3615: [ 49.989737][ T3615] kasan_save_stack+0x1e/0x40 [ 49.994414][ T3615] __kasan_kmalloc+0xa9/0xd0 [ 49.999001][ T3615] nilfs_find_or_create_root+0x84/0x4d0 [ 50.004804][ T3615] nilfs_attach_checkpoint+0xc1/0x4b0 [ 50.010374][ T3615] nilfs_mount+0xb12/0xfb0 [ 50.014788][ T3615] legacy_get_tree+0x105/0x220 [ 50.019556][ T3615] vfs_get_tree+0x89/0x2f0 [ 50.023969][ T3615] path_mount+0x1326/0x1e20 [ 50.028470][ T3615] __x64_sys_mount+0x27f/0x300 [ 50.033230][ T3615] do_syscall_64+0x35/0xb0 [ 50.037723][ T3615] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 50.043621][ T3615] [ 50.045927][ T3615] Freed by task 3615: [ 50.049891][ T3615] kasan_save_stack+0x1e/0x40 [ 50.054567][ T3615] kasan_set_track+0x21/0x30 [ 50.059151][ T3615] kasan_set_free_info+0x20/0x30 [ 50.064087][ T3615] ____kasan_slab_free+0x166/0x1c0 [ 50.069204][ T3615] slab_free_freelist_hook+0x8b/0x1c0 [ 50.074572][ T3615] kfree+0xe2/0x580 [ 50.078376][ T3615] nilfs_put_root+0xb1/0xd0 [ 50.082881][ T3615] nilfs_clear_inode+0x29a/0x330 [ 50.087815][ T3615] nilfs_evict_inode+0x318/0x440 [ 50.092754][ T3615] evict+0x2ed/0x6b0 [ 50.096646][ T3615] dispose_list+0x117/0x1e0 [ 50.101158][ T3615] evict_inodes+0x352/0x450 [ 50.105665][ T3615] generic_shutdown_super+0xab/0x410 [ 50.110954][ T3615] kill_block_super+0x97/0xf0 [ 50.115633][ T3615] deactivate_locked_super+0x94/0x160 [ 50.121010][ T3615] deactivate_super+0xad/0xd0 [ 50.125692][ T3615] cleanup_mnt+0x2ae/0x3d0 [ 50.130117][ T3615] task_work_run+0xdd/0x1a0 [ 50.134625][ T3615] do_exit+0xad5/0x29b0 [ 50.138793][ T3615] do_group_exit+0xd2/0x2f0 [ 50.143386][ T3615] __x64_sys_exit_group+0x3a/0x50 [ 50.148411][ T3615] do_syscall_64+0x35/0xb0 [ 50.152818][ T3615] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 50.158714][ T3615] [ 50.161030][ T3615] The buggy address belongs to the object at ffff888024d33600 [ 50.161030][ T3615] which belongs to the cache kmalloc-256 of size 256 [ 50.175168][ T3615] The buggy address is located 48 bytes inside of [ 50.175168][ T3615] 256-byte region [ffff888024d33600, ffff888024d33700) [ 50.188356][ T3615] [ 50.190667][ T3615] The buggy address belongs to the physical page: [ 50.197061][ T3615] page:ffffea0000934c80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x24d32 [ 50.207306][ T3615] head:ffffea0000934c80 order:1 compound_mapcount:0 compound_pincount:0 [ 50.215714][ T3615] flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) [ 50.223705][ T3615] raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888011841b40 [ 50.232301][ T3615] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 50.240882][ T3615] page dumped because: kasan: bad access detected [ 50.247280][ T3615] page_owner tracks the page as allocated [ 50.252985][ T3615] page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 9240456038, free_ts 0 [ 50.272610][ T3615] get_page_from_freelist+0x109b/0x2ce0 [ 50.278188][ T3615] __alloc_pages+0x1c7/0x510 [ 50.282774][ T3615] alloc_page_interleave+0x1e/0x200 [ 50.287964][ T3615] alloc_pages+0x22f/0x270 [ 50.292372][ T3615] allocate_slab+0x27e/0x3d0 [ 50.296951][ T3615] ___slab_alloc+0x84f/0xe80 [ 50.301529][ T3615] __slab_alloc.constprop.0+0x4d/0xa0 [ 50.306890][ T3615] __kmalloc+0x32b/0x340 [ 50.311126][ T3615] __register_sysctl_table+0x9eb/0x10a0 [ 50.316664][ T3615] dccp_sysctl_init+0x21/0x3e [ 50.321372][ T3615] dccp_init+0x61d/0x6c4 [ 50.325607][ T3615] do_one_initcall+0xfe/0x650 [ 50.330283][ T3615] kernel_init_freeable+0x6b1/0x73a [ 50.335475][ T3615] kernel_init+0x1a/0x1d0 [ 50.339806][ T3615] ret_from_fork+0x1f/0x30 [ 50.344217][ T3615] page_owner free stack trace missing [ 50.349568][ T3615] [ 50.351876][ T3615] Memory state around the buggy address: [ 50.357488][ T3615] ffff888024d33500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 50.365532][ T3615] ffff888024d33580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 50.373580][ T3615] >ffff888024d33600: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.381626][ T3615] ^ [ 50.387243][ T3615] ffff888024d33680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.395293][ T3615] ffff888024d33700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 50.403343][ T3615] ================================================================== [ 50.411588][ T3615] Kernel panic - not syncing: panic_on_warn set ... [ 50.418268][ T3615] CPU: 1 PID: 3615 Comm: syz-executor383 Not tainted 6.0.0-syzkaller-05118-g833477fce7a1 #0 [ 50.428320][ T3615] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 50.438363][ T3615] Call Trace: [ 50.441626][ T3615] [ 50.444545][ T3615] dump_stack_lvl+0xcd/0x134 [ 50.449136][ T3615] panic+0x2c8/0x627 [ 50.453040][ T3615] ? panic_print_sys_info.part.0+0x10b/0x10b [ 50.459015][ T3615] ? preempt_schedule_common+0x59/0xc0 [ 50.464470][ T3615] ? preempt_schedule_thunk+0x16/0x18 [ 50.469843][ T3615] ? nilfs_segctor_confirm+0x175/0x190 [ 50.475299][ T3615] end_report.part.0+0x3f/0x7c [ 50.480059][ T3615] kasan_report.cold+0xa/0xf [ 50.484651][ T3615] ? nilfs_segctor_confirm+0x175/0x190 [ 50.490111][ T3615] nilfs_segctor_confirm+0x175/0x190 [ 50.495395][ T3615] nilfs_detach_log_writer+0x856/0x9f0 [ 50.500856][ T3615] ? nilfs_clean_segments+0xa80/0xa80 [ 50.506401][ T3615] ? collect_domain_accesses+0xbf0/0xbf0 [ 50.512040][ T3615] ? __fsnotify_vfsmount_delete+0x20/0x20 [ 50.517760][ T3615] ? dispose_list+0x1e0/0x1e0 [ 50.522439][ T3615] nilfs_put_super+0x3f/0x1a0 [ 50.527112][ T3615] ? nilfs_freeze+0xc0/0xc0 [ 50.531610][ T3615] generic_shutdown_super+0x154/0x410 [ 50.537066][ T3615] kill_block_super+0x97/0xf0 [ 50.541744][ T3615] deactivate_locked_super+0x94/0x160 [ 50.547116][ T3615] deactivate_super+0xad/0xd0 [ 50.552224][ T3615] cleanup_mnt+0x2ae/0x3d0 [ 50.556638][ T3615] task_work_run+0xdd/0x1a0 [ 50.561141][ T3615] do_exit+0xad5/0x29b0 [ 50.565296][ T3615] ? mm_update_next_owner+0x7a0/0x7a0 [ 50.570671][ T3615] ? _raw_spin_unlock_irq+0x1f/0x40 [ 50.575875][ T3615] ? _raw_spin_unlock_irq+0x1f/0x40 [ 50.581077][ T3615] do_group_exit+0xd2/0x2f0 [ 50.585584][ T3615] __x64_sys_exit_group+0x3a/0x50 [ 50.590608][ T3615] do_syscall_64+0x35/0xb0 [ 50.595019][ T3615] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 50.600921][ T3615] RIP: 0033:0x7f25d90e6ba9 [ 50.605323][ T3615] Code: Unable to access opcode bytes at 0x7f25d90e6b7f. [ 50.612325][ T3615] RSP: 002b:00007ffe9fa16e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 50.620731][ T3615] RAX: ffffffffffffffda RBX: 00007f25d915e330 RCX: 00007f25d90e6ba9 [ 50.628785][ T3615] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 50.636920][ T3615] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007f25d9158e40 [ 50.645061][ T3615] R10: 00007f25d9158e40 R11: 0000000000000246 R12: 00007f25d915e330 [ 50.653035][ T3615] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 50.661014][ T3615] [ 50.664751][ T3615] Kernel Offset: disabled [ 50.669073][ T3615] Rebooting in 86400 seconds..