[ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.147' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 81.033662][ T28] audit: type=1400 audit(1602160598.007:8): avc: denied { execmem } for pid=6873 comm="syz-executor237" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 81.043882][ T6873] ERROR: (device loop0): xtSearch: XT_GETPAGE: xtree page corrupt [ 81.043882][ T6873] [ 81.067097][ T6873] BUG: unable to handle page fault for address: ffffffffffffff80 [ 81.074942][ T6873] #PF: supervisor read access in kernel mode [ 81.081237][ T6873] #PF: error_code(0x0000) - not-present page [ 81.087185][ T6873] PGD 9e90067 P4D 9e90067 PUD 9e92067 PMD 0 [ 81.093142][ T6873] Oops: 0000 [#1] PREEMPT SMP KASAN [ 81.098313][ T6873] CPU: 0 PID: 6873 Comm: syz-executor237 Not tainted 5.9.0-rc8-syzkaller #0 [ 81.106967][ T6873] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.117019][ T6873] RIP: 0010:diFree+0x13d/0x2dc0 [ 81.121932][ T6873] Code: 28 48 8d 78 80 48 89 44 24 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 ef 23 00 00 48 8b 44 24 18 <4c> 8b 60 80 48 8b 44 24 20 49 8d 6c 24 04 48 c1 e8 0c 48 89 ea 48 [ 81.141965][ T6873] RSP: 0018:ffffc90005187958 EFLAGS: 00010246 [ 81.148091][ T6873] RAX: 0000000000000000 RBX: ffff8880a670ae00 RCX: ffffffff82a8dd47 [ 81.156054][ T6873] RDX: 1ffffffffffffff0 RSI: ffffffff82ab0e22 RDI: ffffffffffffff80 [ 81.164012][ T6873] RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88808404c0df [ 81.171963][ T6873] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88808404c588 [ 81.179928][ T6873] R13: ffff88808404c4d8 R14: ffffffff88bf1440 R15: ffff88808404c4b0 [ 81.187881][ T6873] FS: 000000000153f880(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 [ 81.196799][ T6873] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 81.203356][ T6873] CR2: ffffffffffffff80 CR3: 000000008e9f9000 CR4: 00000000001506f0 [ 81.211337][ T6873] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 81.219630][ T6873] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 81.227573][ T6873] Call Trace: [ 81.230844][ T6873] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 81.236811][ T6873] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 81.242804][ T6873] ? __dquot_initialize+0x298/0xc20 [ 81.247986][ T6873] ? lock_acquire+0x1f3/0xaf0 [ 81.252666][ T6873] ? lock_is_held_type+0xbb/0xf0 [ 81.257608][ T6873] ? find_held_lock+0x2d/0x110 [ 81.262359][ T6873] ? dquot_initialize_needed+0x290/0x290 [ 81.267985][ T6873] ? diWrite+0x1430/0x1430 [ 81.272547][ T6873] ? lock_downgrade+0x830/0x830 [ 81.277386][ T6873] ? var_wake_function+0x130/0x130 [ 81.282488][ T6873] ? rwlock_bug.part.0+0x90/0x90 [ 81.287512][ T6873] jfs_evict_inode+0x2c9/0x370 [ 81.292353][ T6873] ? jfs_write_inode+0x1e0/0x1e0 [ 81.297276][ T6873] evict+0x2ed/0x750 [ 81.301160][ T6873] iput.part.0+0x424/0x850 [ 81.305558][ T6873] iput+0x58/0x70 [ 81.309173][ T6873] diFreeSpecial+0x6f/0x90 [ 81.313562][ T6873] jfs_mount+0x23f/0x3d0 [ 81.317910][ T6873] jfs_fill_super+0x5b1/0xbc0 [ 81.322574][ T6873] ? init_once+0x130/0x130 [ 81.326963][ T6873] ? set_blocksize+0x1c1/0x400 [ 81.331799][ T6873] mount_bdev+0x32e/0x3f0 [ 81.336102][ T6873] ? init_once+0x130/0x130 [ 81.340491][ T6873] ? jfs_get_dquots+0x10/0x10 [ 81.345138][ T6873] legacy_get_tree+0x105/0x220 [ 81.349876][ T6873] vfs_get_tree+0x89/0x2f0 [ 81.354272][ T6873] path_mount+0x1387/0x20a0 [ 81.358748][ T6873] ? strncpy_from_user+0x2bf/0x3e0 [ 81.363843][ T6873] ? copy_mount_string+0x40/0x40 [ 81.368771][ T6873] ? getname_flags.part.0+0x1dd/0x4f0 [ 81.374115][ T6873] __x64_sys_mount+0x27f/0x300 [ 81.378850][ T6873] ? copy_mnt_ns+0xa60/0xa60 [ 81.383415][ T6873] ? check_preemption_disabled+0x50/0x130 [ 81.389108][ T6873] ? syscall_enter_from_user_mode+0x1d/0x60 [ 81.394974][ T6873] do_syscall_64+0x2d/0x70 [ 81.399365][ T6873] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 81.405229][ T6873] RIP: 0033:0x446e0a [ 81.409100][ T6873] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 81.428674][ T6873] RSP: 002b:00007ffe08313608 EFLAGS: 00000283 ORIG_RAX: 00000000000000a5 [ 81.437059][ T6873] RAX: ffffffffffffffda RBX: 00007ffe08313660 RCX: 0000000000446e0a [ 81.445022][ T6873] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffe08313620 [ 81.452968][ T6873] RBP: 00007ffe08313620 R08: 00007ffe08313660 R09: 0000000000000000 [ 81.460917][ T6873] R10: 0000000000000000 R11: 0000000000000283 R12: 0000000000000002 [ 81.468870][ T6873] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 81.476842][ T6873] Modules linked in: [ 81.480711][ T6873] CR2: ffffffffffffff80 [ 81.484839][ T6873] ---[ end trace a23fb3f1103b0304 ]--- [ 81.490273][ T6873] RIP: 0010:diFree+0x13d/0x2dc0 [ 81.495097][ T6873] Code: 28 48 8d 78 80 48 89 44 24 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 ef 23 00 00 48 8b 44 24 18 <4c> 8b 60 80 48 8b 44 24 20 49 8d 6c 24 04 48 c1 e8 0c 48 89 ea 48 [ 81.514689][ T6873] RSP: 0018:ffffc90005187958 EFLAGS: 00010246 [ 81.520726][ T6873] RAX: 0000000000000000 RBX: ffff8880a670ae00 RCX: ffffffff82a8dd47 [ 81.528671][ T6873] RDX: 1ffffffffffffff0 RSI: ffffffff82ab0e22 RDI: ffffffffffffff80 [ 81.536614][ T6873] RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88808404c0df [ 81.544575][ T6873] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88808404c588 [ 81.552520][ T6873] R13: ffff88808404c4d8 R14: ffffffff88bf1440 R15: ffff88808404c4b0 [ 81.560485][ T6873] FS: 000000000153f880(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 [ 81.569387][ T6873] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 81.575941][ T6873] CR2: ffffffffffffff80 CR3: 000000008e9f9000 CR4: 00000000001506f0 [ 81.583891][ T6873] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 81.591836][ T6873] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 81.599870][ T6873] Kernel panic - not syncing: Fatal exception [ 81.607350][ T6873] Kernel Offset: disabled [ 81.611668][ T6873] Rebooting in 86400 seconds..