Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 44.156491] audit: type=1800 audit(1584440638.362:33): pid=7726 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 [ 44.177847] audit: type=1800 audit(1584440638.362:34): pid=7726 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 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 46.141322] audit: type=1400 audit(1584440640.352:35): avc: denied { map } for pid=7904 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 Warning: Permanently added '10.128.15.218' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 61.319515] audit: type=1400 audit(1584440655.532:36): avc: denied { map } for pid=7916 comm="syz-executor871" path="/root/syz-executor871243453" 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 [ 61.394778] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 61.410122] minix_free_inode: bit 1 already cleared [ 61.422804] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 61.434247] minix_free_inode: bit 1 already cleared [ 61.454407] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 61.455300] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 61.469280] minix_free_inode: bit 1 already cleared [ 61.477283] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 61.479246] minix_free_inode: bit 1 already cleared [ 61.489992] minix_free_inode: bit 1 already cleared [ 61.526244] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 61.526431] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 61.540454] minix_free_inode: bit 1 already cleared [ 61.546642] minix_free_inode: bit 1 already cleared executing program [ 61.732934] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 61.745932] minix_free_inode: bit 1 already cleared [ 61.772231] MINIX-fs: mounting unchecked file system, running fsck is recommended executing program executing program [ 61.775468] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 61.791009] minix_free_inode: bit 1 already cleared [ 61.796066] minix_free_inode: bit 1 already cleared [ 61.802323] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 61.811887] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 61.814621] minix_free_inode: bit 1 already cleared [ 61.824641] minix_free_inode: bit 1 already cleared [ 61.858397] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 61.868556] minix_free_inode: bit 1 already cleared [ 61.874345] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 61.882900] minix_free_inode: bit 1 already cleared executing program executing program executing program executing program [ 62.176163] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 62.184366] minix_free_inode: bit 1 already cleared [ 62.196114] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 62.246397] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 62.248340] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 [ 62.260737] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 62.262090] PGD a95dd067 P4D a95dd067 PUD 94208067 PMD 0 [ 62.269844] minix_free_inode: bit 1 already cleared [ 62.275232] Oops: 0002 [#1] PREEMPT SMP KASAN [ 62.280355] minix_free_inode: bit 1 already cleared [ 62.284715] CPU: 0 PID: 8007 Comm: syz-executor871 Not tainted 4.19.110-syzkaller #0 [ 62.297566] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.300152] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 62.306916] RIP: 0010:get_block+0x76c/0x1300 [ 62.318791] minix_free_inode: bit 1 already cleared [ 62.318897] Code: 00 00 49 8b bc 24 28 01 00 00 b9 08 00 00 00 e8 2a 57 bc ff 31 d2 be 6c 01 00 00 48 c7 c7 e0 4a 7c 87 49 89 c4 e8 e4 82 4e ff 49 0f ba 2c 24 02 40 0f 92 c6 31 ff 40 88 74 24 78 e8 dd 2a 6f [ 62.318902] RSP: 0018:ffff8880934ff788 EFLAGS: 00010246 [ 62.318910] RAX: 0000000000000007 RBX: ffff8880934ff888 RCX: 1ffffffff11f8a30 [ 62.318917] RDX: 0000000000000000 RSI: ffffffff88b92960 RDI: ffff88808d618324 [ 62.318922] RBP: ffff8880934ff920 R08: ffff88808d618300 R09: fffff940004582c7 [ 62.318932] R10: fffff940004582c6 R11: ffffea00022c1637 R12: 0000000000000000 [ 62.377227] R13: dffffc0000000000 R14: ffff8880934ff84c R15: 0000000000000c98 [ 62.384487] FS: 00007f1f191ad700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 62.392699] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.398559] CR2: 0000000000000000 CR3: 00000000a0dd2000 CR4: 00000000001406f0 [ 62.405813] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.413069] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.420317] Call Trace: [ 62.422895] ? block_to_path.isra.0+0x300/0x300 [ 62.427546] ? create_page_buffers+0x380/0x380 [ 62.432120] ? __ia32_sys_statfs+0x27/0x70 [ 62.436333] ? register_lock_class+0xd08/0x16f0 [ 62.440981] ? do_raw_spin_lock+0xcb/0x240 [ 62.445199] ? create_empty_buffers+0x52e/0x830 [ 62.449851] ? __add_to_page_cache_locked+0x5b7/0xc50 [ 62.455019] ? do_raw_spin_unlock+0x171/0x260 [ 62.459498] minix_get_block+0xe5/0x110 [ 62.463454] __block_write_begin_int+0x480/0x17a0 [ 62.468273] ? minix_rename+0x8c0/0x8c0 [ 62.472233] ? __breadahead+0xf0/0xf0 [ 62.476034] ? pagecache_get_page+0x1b3/0xd10 [ 62.480523] ? wait_for_stable_page+0x124/0x3b0 [ 62.485194] ? minix_rename+0x8c0/0x8c0 [ 62.489164] block_write_begin+0x58/0x2e0 [ 62.493304] minix_write_begin+0x35/0xe0 [ 62.497380] generic_perform_write+0x1f8/0x4d0 [ 62.501946] ? page_endio+0x770/0x770 [ 62.505736] ? current_time+0x140/0x140 [ 62.509699] ? lock_acquire+0x170/0x400 [ 62.513667] __generic_file_write_iter+0x24c/0x610 [ 62.518579] generic_file_write_iter+0x37f/0x729 [ 62.523315] __vfs_write+0x512/0x760 [ 62.527041] ? kernel_read+0x110/0x110 [ 62.530909] ? __lock_is_held+0xad/0x140 [ 62.534955] ? rcu_read_lock_sched_held+0x10a/0x130 [ 62.539972] ? rcu_sync_lockdep_assert+0x69/0xa0 [ 62.544709] vfs_write+0x206/0x550 [ 62.548229] ksys_write+0x12b/0x2a0 [ 62.551835] ? __ia32_sys_read+0xb0/0xb0 [ 62.555877] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 62.560609] ? trace_hardirqs_off_caller+0x55/0x210 [ 62.565603] ? do_syscall_64+0x21/0x620 [ 62.569553] do_syscall_64+0xf9/0x620 [ 62.573332] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 62.578501] RIP: 0033:0x44b339 [ 62.581672] Code: 5d ca fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 2b ca fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 62.600550] RSP: 002b:00007f1f191acce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 62.608234] RAX: ffffffffffffffda RBX: 00000000006ddc38 RCX: 000000000044b339 [ 62.615480] RDX: 000000000000fdef RSI: 00000000200002c0 RDI: 0000000000000003 [ 62.622728] RBP: 00000000006ddc30 R08: 0000000000000000 R09: 0000000000000000 [ 62.629982] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc3c [ 62.637226] R13: 00007ffca4f25b2f R14: 00007f1f191ad9c0 R15: 0000000000000001 [ 62.644475] Modules linked in: executing program [ 62.647670] CR2: 0000000000000000 [ 62.652253] ---[ end trace 68f5fa087cfde757 ]--- [ 62.657104] RIP: 0010:get_block+0x76c/0x1300 [ 62.661592] Code: 00 00 49 8b bc 24 28 01 00 00 b9 08 00 00 00 e8 2a 57 bc ff 31 d2 be 6c 01 00 00 48 c7 c7 e0 4a 7c 87 49 89 c4 e8 e4 82 4e ff 49 0f ba 2c 24 02 40 0f 92 c6 31 ff 40 88 74 24 78 e8 dd 2a 6f [ 62.680968] RSP: 0018:ffff8880934ff788 EFLAGS: 00010246 [ 62.687991] RAX: 0000000000000007 RBX: ffff8880934ff888 RCX: 1ffffffff11f8a30 [ 62.696201] RDX: 0000000000000000 RSI: ffffffff88b92960 RDI: ffff88808d618324 [ 62.703527] RBP: ffff8880934ff920 R08: ffff88808d618300 R09: fffff940004582c7 [ 62.710852] R10: fffff940004582c6 R11: ffffea00022c1637 R12: 0000000000000000 [ 62.718117] R13: dffffc0000000000 R14: ffff8880934ff84c R15: 0000000000000c98 [ 62.725616] FS: 00007f1f191ad700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 62.733890] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.739797] CR2: 00000000004c344c CR3: 00000000a0dd2000 CR4: 00000000001406f0 executing program [ 62.747064] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.759099] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.766390] Kernel panic - not syncing: Fatal exception [ 62.773013] Kernel Offset: disabled [ 62.776633] Rebooting in 86400 seconds..