[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.223' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 53.921429][ T8394] loop0: detected capacity change from 0 to 8 [ 53.966057][ T8394] divide error: 0000 [#1] PREEMPT SMP KASAN [ 53.972166][ T8394] CPU: 1 PID: 8394 Comm: syz-executor613 Not tainted 5.12.0-syzkaller #0 [ 53.980578][ T8394] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.990632][ T8394] RIP: 0010:squashfs_readpage+0xa0d/0x2210 [ 53.996464][ T8394] Code: 3c 24 31 d2 48 63 8c 24 b4 00 00 00 49 8b 47 c8 48 89 cf 48 c1 e1 0b c1 e7 0b 89 7c 24 4c 31 ff 48 89 44 24 60 48 63 44 24 70 <48> f7 f1 49 89 c6 89 c6 48 89 44 24 58 89 44 24 1c 89 44 24 48 e8 [ 54.016067][ T8394] RSP: 0018:ffffc9000188f3e8 EFLAGS: 00010246 [ 54.022128][ T8394] RAX: 0000000000000000 RBX: 0000000000000099 RCX: 0000000000000000 [ 54.030177][ T8394] RDX: 0000000000000000 RSI: ffffffff8221fc4d RDI: 0000000000000000 [ 54.038134][ T8394] RBP: 000000000000000c R08: ffffffffffffffff R09: 000000000000000c [ 54.046090][ T8394] R10: ffffffff8221fc3e R11: 000000000000003f R12: 00000000000000de [ 54.054136][ T8394] R13: ffff888033290088 R14: 0000000000000000 R15: ffff888033290038 [ 54.062095][ T8394] FS: 00000000024ae300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 54.071009][ T8394] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.077579][ T8394] CR2: 00007fffe4921df8 CR3: 0000000014fc9000 CR4: 0000000000350ee0 [ 54.085534][ T8394] Call Trace: [ 54.089078][ T8394] ? xa_load+0x17d/0x270 [ 54.093310][ T8394] ? __xa_clear_mark+0x110/0x110 [ 54.098230][ T8394] ? find_held_lock+0x2d/0x110 [ 54.103177][ T8394] ? squashfs_copy_cache+0x6c0/0x6c0 [ 54.108455][ T8394] ? lru_cache_add+0x594/0xb30 [ 54.113207][ T8394] ? lock_downgrade+0x6e0/0x6e0 [ 54.118045][ T8394] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 54.124272][ T8394] ? readahead_page+0x2f2/0x450 [ 54.129108][ T8394] ? squashfs_copy_cache+0x6c0/0x6c0 [ 54.134468][ T8394] read_pages+0x5c5/0x8d0 [ 54.138784][ T8394] ? readahead_expand+0x830/0x830 [ 54.143794][ T8394] ? add_to_page_cache_lru+0x2ab/0x5b0 [ 54.149241][ T8394] ? __page_cache_alloc+0x10d/0x3a0 [ 54.154426][ T8394] page_cache_ra_unbounded+0x61f/0x920 [ 54.159874][ T8394] ? read_pages+0x8d0/0x8d0 [ 54.164361][ T8394] ? lock_downgrade+0x6e0/0x6e0 [ 54.169196][ T8394] ondemand_readahead+0x65c/0x1190 [ 54.174296][ T8394] page_cache_sync_ra+0x1cb/0x200 [ 54.179479][ T8394] filemap_get_pages+0x29f/0x1920 [ 54.184489][ T8394] ? __lock_page_async+0x4d0/0x4d0 [ 54.189585][ T8394] filemap_read+0x2ca/0xe40 [ 54.194072][ T8394] ? find_held_lock+0x2d/0x110 [ 54.198822][ T8394] ? aa_file_perm+0x5bb/0x1170 [ 54.203571][ T8394] ? filemap_get_pages+0x1920/0x1920 [ 54.208841][ T8394] ? aa_file_perm+0x5e5/0x1170 [ 54.213590][ T8394] generic_file_read_iter+0x397/0x4f0 [ 54.218945][ T8394] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 54.225171][ T8394] ? iov_iter_kvec+0x3c/0x130 [ 54.229947][ T8394] __kernel_read+0x58d/0xa90 [ 54.234523][ T8394] ? do_sendfile+0x1110/0x1110 [ 54.239274][ T8394] ? lock_downgrade+0x6e0/0x6e0 [ 54.244112][ T8394] kernel_read+0x52/0x70 [ 54.248338][ T8394] bprm_execve+0x740/0x19a0 [ 54.253022][ T8394] ? open_exec+0x70/0x70 [ 54.257246][ T8394] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 54.263474][ T8394] ? copy_string_kernel+0x48d/0x520 [ 54.268659][ T8394] do_execveat_common+0x626/0x7c0 [ 54.273670][ T8394] ? bprm_execve+0x19a0/0x19a0 [ 54.278418][ T8394] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 54.284650][ T8394] __x64_sys_execveat+0xed/0x130 [ 54.289573][ T8394] ? trace_hardirqs_on+0x38/0x1c0 [ 54.294675][ T8394] do_syscall_64+0x3a/0xb0 [ 54.299089][ T8394] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 54.304971][ T8394] RIP: 0033:0x443c09 [ 54.308848][ T8394] 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 [ 54.328438][ T8394] RSP: 002b:00007ffdd2359618 EFLAGS: 00000246 ORIG_RAX: 0000000000000142 [ 54.336840][ T8394] RAX: ffffffffffffffda RBX: 00000000004004a0 RCX: 0000000000443c09 [ 54.344793][ T8394] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000005 [ 54.352746][ T8394] RBP: 00000000004034a0 R08: 0000000000000000 R09: 00000000004004a0 [ 54.360700][ T8394] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000403530 [ 54.368650][ T8394] R13: 0000000000000000 R14: 00000000004b1018 R15: 00000000004004a0 [ 54.376608][ T8394] Modules linked in: [ 54.385126][ T8394] ---[ end trace eb837301c73b908d ]--- [ 54.398134][ T8394] RIP: 0010:squashfs_readpage+0xa0d/0x2210 [ 54.403962][ T8394] Code: 3c 24 31 d2 48 63 8c 24 b4 00 00 00 49 8b 47 c8 48 89 cf 48 c1 e1 0b c1 e7 0b 89 7c 24 4c 31 ff 48 89 44 24 60 48 63 44 24 70 <48> f7 f1 49 89 c6 89 c6 48 89 44 24 58 89 44 24 1c 89 44 24 48 e8 [ 54.425547][ T8394] RSP: 0018:ffffc9000188f3e8 EFLAGS: 00010246 [ 54.431881][ T8394] RAX: 0000000000000000 RBX: 0000000000000099 RCX: 0000000000000000 [ 54.440903][ T8394] RDX: 0000000000000000 RSI: ffffffff8221fc4d RDI: 0000000000000000 [ 54.449636][ T8394] RBP: 000000000000000c R08: ffffffffffffffff R09: 000000000000000c [ 54.457779][ T8394] R10: ffffffff8221fc3e R11: 000000000000003f R12: 00000000000000de [ 54.465932][ T8394] R13: ffff888033290088 R14: 0000000000000000 R15: ffff888033290038 [ 54.474504][ T8394] FS: 00000000024ae300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 54.483816][ T8394] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.490660][ T8394] CR2: 00007f2f175e5030 CR3: 0000000014fc9000 CR4: 0000000000350ef0 [ 54.498755][ T8394] Kernel panic - not syncing: Fatal exception [ 54.508553][ T8394] Kernel Offset: disabled [ 54.512946][ T8394] Rebooting in 86400 seconds..