Warning: Permanently added '10.128.1.2' (ECDSA) to the list of known hosts. executing program [ 35.460424] ================================================================== [ 35.467901] BUG: KASAN: slab-out-of-bounds in squashfs_export_iget+0x274/0x2a0 [ 35.475292] Read of size 8 at addr ffff8880a9cf6ff8 by task syz-executor246/8082 [ 35.482820] [ 35.484457] CPU: 1 PID: 8082 Comm: syz-executor246 Not tainted 4.19.172-syzkaller #0 [ 35.492336] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.501697] Call Trace: [ 35.504297] dump_stack+0x1fc/0x2ef [ 35.507942] print_address_description.cold+0x54/0x219 [ 35.513228] kasan_report_error.cold+0x8a/0x1b9 [ 35.517905] ? squashfs_export_iget+0x274/0x2a0 [ 35.522575] __asan_report_load8_noabort+0x88/0x90 [ 35.527524] ? squashfs_export_iget+0x274/0x2a0 [ 35.532217] squashfs_export_iget+0x274/0x2a0 [ 35.536694] ? squashfs_readdir+0xd30/0xd30 [ 35.541012] ? depot_save_stack+0x258/0x410 [ 35.545351] ? __lock_acquire+0x6de/0x3ff0 [ 35.549589] squashfs_fh_to_dentry+0x78/0xb0 [ 35.553983] exportfs_decode_fh+0x126/0x7e0 [ 35.558286] ? drop_caches_sysctl_handler+0x110/0x110 [ 35.563456] ? squashfs_get_parent+0xa0/0xa0 [ 35.567847] ? reconnect_path+0x7e0/0x7e0 [ 35.571979] ? lock_downgrade+0x720/0x720 [ 35.576117] ? lock_acquire+0x170/0x3c0 [ 35.580074] ? debug_check_no_obj_freed+0xb5/0x490 [ 35.584988] ? __might_fault+0x11f/0x1d0 [ 35.589030] ? lock_downgrade+0x720/0x720 [ 35.593169] ? lock_acquire+0x170/0x3c0 [ 35.597121] ? __might_fault+0xef/0x1d0 [ 35.601080] ? __might_fault+0x192/0x1d0 [ 35.605126] do_handle_open+0x2f4/0x650 [ 35.609093] ? do_sys_name_to_handle+0x480/0x480 [ 35.613830] ? fput+0x2b/0x190 [ 35.617006] ? trace_hardirqs_off_caller+0x6e/0x210 [ 35.622019] ? do_syscall_64+0x21/0x620 [ 35.625983] do_syscall_64+0xf9/0x620 [ 35.629769] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 35.634940] RIP: 0033:0x443c19 [ 35.638111] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 35.656993] RSP: 002b:00007ffefe2873c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000130 [ 35.664681] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000443c19 [ 35.671949] RDX: 0000000000000000 RSI: 00000000200003c0 RDI: 0000000000000003 [ 35.679202] RBP: 00000000004034b0 R08: 0000000000000000 R09: 00000000004004a0 [ 35.686451] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000403540 [ 35.693700] R13: 0000000000000000 R14: 00000000004b1018 R15: 00000000004004a0 [ 35.700958] [ 35.702575] Allocated by task 7759: [ 35.706188] kmem_cache_alloc_trace+0x12f/0x380 [ 35.710840] __do_execve_file+0x33b/0x2360 [ 35.715063] do_execve+0x35/0x50 [ 35.718409] call_usermodehelper_exec_async+0x50e/0x6a0 [ 35.723763] ret_from_fork+0x24/0x30 [ 35.727449] [ 35.729051] Freed by task 7759: [ 35.732312] kfree+0xcc/0x210 [ 35.735408] __do_execve_file+0x187a/0x2360 [ 35.739707] do_execve+0x35/0x50 [ 35.743052] call_usermodehelper_exec_async+0x50e/0x6a0 [ 35.748402] ret_from_fork+0x24/0x30 [ 35.752097] [ 35.753716] The buggy address belongs to the object at ffff8880a9cf6dc0 [ 35.753716] which belongs to the cache kmalloc-256 of size 256 [ 35.766367] The buggy address is located 312 bytes to the right of [ 35.766367] 256-byte region [ffff8880a9cf6dc0, ffff8880a9cf6ec0) [ 35.778738] The buggy address belongs to the page: [ 35.783649] page:ffffea0002a73d80 count:1 mapcount:0 mapping:ffff88813bff07c0 index:0xffff8880a9cf6a00 [ 35.793070] flags: 0xfff00000000100(slab) [ 35.797211] raw: 00fff00000000100 ffffea0002a553c8 ffffea0002a518c8 ffff88813bff07c0 [ 35.805073] raw: ffff8880a9cf6a00 ffff8880a9cf6000 0000000100000005 0000000000000000 [ 35.812927] page dumped because: kasan: bad access detected [ 35.818607] [ 35.820211] Memory state around the buggy address: [ 35.825117] ffff8880a9cf6e80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.832454] ffff8880a9cf6f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.839794] >ffff8880a9cf6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.847130] ^ [ 35.854467] ffff8880a9cf7000: 00 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc [ 35.861806] ffff8880a9cf7080: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 35.869140] ================================================================== [ 35.876472] Disabling lock debugging due to kernel taint [ 35.885139] Kernel panic - not syncing: panic_on_warn set ... [ 35.885139] [ 35.892543] CPU: 1 PID: 8082 Comm: syz-executor246 Tainted: G B 4.19.172-syzkaller #0 [ 35.901806] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.911149] Call Trace: [ 35.913722] dump_stack+0x1fc/0x2ef [ 35.917350] panic+0x26a/0x50e [ 35.920538] ? __warn_printk+0xf3/0xf3 [ 35.924417] ? preempt_schedule_common+0x45/0xc0 [ 35.929152] ? ___preempt_schedule+0x16/0x18 [ 35.933541] ? trace_hardirqs_on+0x55/0x210 [ 35.937842] kasan_end_report+0x43/0x49 [ 35.941795] kasan_report_error.cold+0xa7/0x1b9 [ 35.946443] ? squashfs_export_iget+0x274/0x2a0 [ 35.951095] __asan_report_load8_noabort+0x88/0x90 [ 35.956002] ? squashfs_export_iget+0x274/0x2a0 [ 35.960652] squashfs_export_iget+0x274/0x2a0 [ 35.965123] ? squashfs_readdir+0xd30/0xd30 [ 35.969425] ? depot_save_stack+0x258/0x410 [ 35.973728] ? __lock_acquire+0x6de/0x3ff0 [ 35.977960] squashfs_fh_to_dentry+0x78/0xb0 [ 35.982357] exportfs_decode_fh+0x126/0x7e0 [ 35.986660] ? drop_caches_sysctl_handler+0x110/0x110 [ 35.991835] ? squashfs_get_parent+0xa0/0xa0 [ 35.996220] ? reconnect_path+0x7e0/0x7e0 [ 36.000361] ? lock_downgrade+0x720/0x720 [ 36.004487] ? lock_acquire+0x170/0x3c0 [ 36.008448] ? debug_check_no_obj_freed+0xb5/0x490 [ 36.013368] ? __might_fault+0x11f/0x1d0 [ 36.017410] ? lock_downgrade+0x720/0x720 [ 36.021538] ? lock_acquire+0x170/0x3c0 [ 36.025516] ? __might_fault+0xef/0x1d0 [ 36.029482] ? __might_fault+0x192/0x1d0 [ 36.033531] do_handle_open+0x2f4/0x650 [ 36.037483] ? do_sys_name_to_handle+0x480/0x480 [ 36.042217] ? fput+0x2b/0x190 [ 36.045390] ? trace_hardirqs_off_caller+0x6e/0x210 [ 36.050397] ? do_syscall_64+0x21/0x620 [ 36.054353] do_syscall_64+0xf9/0x620 [ 36.058136] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.063305] RIP: 0033:0x443c19 [ 36.066485] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 36.085365] RSP: 002b:00007ffefe2873c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000130 [ 36.093055] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000443c19 [ 36.100302] RDX: 0000000000000000 RSI: 00000000200003c0 RDI: 0000000000000003 [ 36.107559] RBP: 00000000004034b0 R08: 0000000000000000 R09: 00000000004004a0 [ 36.114825] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000403540 [ 36.122083] R13: 0000000000000000 R14: 00000000004b1018 R15: 00000000004004a0 [ 36.129799] Kernel Offset: disabled [ 36.133429] Rebooting in 86400 seconds..