[ 36.235821] audit: type=1800 audit(1585628512.539:33): pid=7252 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 [ 36.257583] audit: type=1800 audit(1585628512.539:34): pid=7252 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 [ 37.299375] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 37.557699] audit: type=1400 audit(1585628513.859:35): avc: denied { map } for pid=7426 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [ 37.627098] random: sshd: uninitialized urandom read (32 bytes read) [ 38.427030] random: sshd: uninitialized urandom read (32 bytes read) [ 1020.941276] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.203' (ECDSA) to the list of known hosts. [ 1026.573018] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 1026.707162] audit: type=1400 audit(1585629503.009:36): avc: denied { map } for pid=7438 comm="syz-executor426" path="/root/syz-executor426238412" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 1026.779933] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1026.780939] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1026.787909] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1026.800452] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1026.815978] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1026.832690] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1026.834691] minix_free_inode: bit 1 already cleared [ 1026.869969] minix_free_inode: bit 1 already cleared [ 1026.875241] minix_free_inode: bit 1 already cleared [ 1026.884735] minix_free_inode: bit 1 already cleared [ 1026.889804] minix_free_inode: bit 1 already cleared [ 1026.900416] minix_free_inode: bit 1 already cleared executing program [ 1026.955297] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1026.976023] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1026.982030] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1026.989689] minix_free_inode: bit 1 already cleared [ 1027.003352] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.017882] minix_free_inode: bit 1 already cleared [ 1027.022997] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.031263] minix_free_inode: bit 1 already cleared [ 1027.038569] MINIX-fs: mounting unchecked file system, running fsck is recommended executing program [ 1027.057157] minix_free_inode: bit 1 already cleared [ 1027.072795] minix_free_inode: bit 1 already cleared [ 1027.082297] minix_free_inode: bit 1 already cleared executing program executing program executing program executing program [ 1027.143688] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.166291] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.193845] minix_free_inode: bit 1 already cleared [ 1027.202924] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.211457] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.221072] minix_free_inode: bit 1 already cleared [ 1027.232693] MINIX-fs: mounting unchecked file system, running fsck is recommended executing program [ 1027.240739] minix_free_inode: bit 1 already cleared [ 1027.248817] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.277923] minix_free_inode: bit 1 already cleared [ 1027.283236] minix_free_inode: bit 1 already cleared [ 1027.288282] minix_free_inode: bit 1 already cleared [ 1027.304257] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.306503] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.337169] minix_free_inode: bit 1 already cleared [ 1027.342860] minix_free_inode: bit 1 already cleared executing program executing program [ 1027.398717] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.413683] minix_free_inode: bit 1 already cleared [ 1027.430958] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.443085] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.448976] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.454792] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.468821] minix_free_inode: bit 1 already cleared [ 1027.474053] minix_free_inode: bit 1 already cleared [ 1027.485099] minix_free_inode: bit 1 already cleared [ 1027.490541] MINIX-fs: mounting unchecked file system, running fsck is recommended executing program executing program [ 1027.505521] minix_free_inode: bit 1 already cleared [ 1027.519255] minix_free_inode: bit 1 already cleared executing program executing program executing program executing program [ 1027.698890] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.735253] BUG: unable to handle kernel NULL pointer dereference at (null) [ 1027.743538] IP: get_block+0x6a7/0x10f0 [ 1027.747428] PGD a0ee4067 P4D a0ee4067 PUD 8fdda067 PMD 0 [ 1027.753016] Oops: 0002 [#1] PREEMPT SMP KASAN [ 1027.757513] Modules linked in: [ 1027.760736] CPU: 0 PID: 7575 Comm: syz-executor426 Not tainted 4.14.174-syzkaller #0 [ 1027.764354] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.768612] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1027.768617] task: ffff888096624540 task.stack: ffff88808c4c0000 [ 1027.768631] RIP: 0010:get_block+0x6a7/0x10f0 [ 1027.768634] RSP: 0018:ffff88808c4c7808 EFLAGS: 00010246 [ 1027.768645] RAX: 0000000000000007 RBX: ffff88808c4c7910 RCX: 1ffffffff10279bc [ 1027.776486] minix_free_inode: bit 1 already cleared [ 1027.785614] RDX: 0000000000000000 RSI: ffffffff87d842e0 RDI: ffff888096624564 [ 1027.785619] RBP: ffff88808c4c7988 R08: 0000000000000001 R09: 0000000000000003 [ 1027.785622] R10: ffff888096624e38 R11: ffff888096624540 R12: ffff88808c4c78d4 [ 1027.785626] R13: ffff8880997ec920 R14: dffffc0000000000 R15: 0000000000000000 [ 1027.785632] FS: 00007f73986db700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 1027.785636] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1027.785640] CR2: 0000000000000000 CR3: 00000000870e8000 CR4: 00000000001406f0 [ 1027.785647] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1027.785650] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1027.785653] Call Trace: [ 1027.785749] ? block_to_path.isra.0+0x2d0/0x2d0 [ 1027.843176] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.843500] ? __lock_buffer+0x50/0x50 [ 1027.858261] minix_free_inode: bit 1 already cleared [ 1027.864907] ? lock_downgrade+0x6e0/0x6e0 [ 1027.864918] ? create_empty_buffers+0x264/0x470 [ 1027.910941] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.911997] ? do_raw_spin_unlock+0x164/0x250 [ 1027.912009] minix_get_block+0xd6/0x100 [ 1027.919774] minix_free_inode: bit 1 already cleared [ 1027.924219] __block_write_begin_int+0x337/0x1030 [ 1027.924229] ? minix_rename+0x760/0x760 [ 1027.924313] ? add_to_page_cache_lru+0x150/0x300 [ 1027.924324] ? __breadahead+0xd0/0xd0 [ 1027.941532] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.942092] ? wait_for_stable_page+0xe3/0x270 [ 1027.949181] minix_free_inode: bit 1 already cleared [ 1027.950619] ? minix_rename+0x760/0x760 [ 1027.950627] block_write_begin+0x58/0x260 [ 1027.950690] minix_write_begin+0x35/0xc0 [ 1027.950702] generic_perform_write+0x1c9/0x420 [ 1027.964277] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 1027.967894] ? page_endio+0x520/0x520 [ 1027.967923] ? current_time+0xb0/0xb0 [ 1027.976708] minix_free_inode: bit 1 already cleared [ 1027.980059] ? lock_acquire+0x170/0x3f0 [ 1027.980070] __generic_file_write_iter+0x227/0x590 [ 1027.980079] generic_file_write_iter+0x2fa/0x650 [ 1027.980146] ? iov_iter_init+0xa6/0x1c0 [ 1027.980182] __vfs_write+0x44e/0x630 [ 1028.026191] ? kernel_read+0x110/0x110 [ 1028.030128] ? rcu_read_lock_sched_held+0x10a/0x130 [ 1028.035126] ? rcu_sync_lockdep_assert+0x69/0xa0 [ 1028.039866] vfs_write+0x192/0x4e0 [ 1028.043391] SyS_write+0xf2/0x210 [ 1028.046853] ? SyS_read+0x210/0x210 [ 1028.050483] ? do_syscall_64+0x4c/0x640 [ 1028.054436] ? SyS_read+0x210/0x210 [ 1028.058044] do_syscall_64+0x1d5/0x640 [ 1028.061996] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1028.067186] RIP: 0033:0x44b209 [ 1028.070354] RSP: 002b:00007f73986dace8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 1028.078053] RAX: ffffffffffffffda RBX: 00000000006ddc38 RCX: 000000000044b209 [ 1028.085326] RDX: 000000000000fdef RSI: 00000000200004c0 RDI: 0000000000000003 [ 1028.092579] RBP: 00000000006ddc30 R08: 0000000000000012 R09: 0000000000000000 [ 1028.099946] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc3c [ 1028.107196] R13: 00007ffc7735dd9f R14: 00007f73986db9c0 R15: 0000000000000001 [ 1028.115794] Code: ca 08 00 00 49 8b bf 28 01 00 00 b9 08 00 00 00 e8 0f 07 c6 ff 31 d2 be 6c 01 00 00 48 c7 c7 e0 f2 b9 86 49 89 c7 e8 b9 46 6d ff 41 0f ba 2f 02 0f 83 1f fe ff ff e8 f8 32 89 ff 4c 89 ff e8 [ 1028.134984] RIP: get_block+0x6a7/0x10f0 RSP: ffff88808c4c7808 [ 1028.140853] CR2: 0000000000000000 [ 1028.145916] ---[ end trace 1566a6c665b089e1 ]--- [ 1028.150753] Kernel panic - not syncing: Fatal exception [ 1028.157333] Kernel Offset: disabled [ 1028.160954] Rebooting in 86400 seconds..