[ 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 '10.128.1.34' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.124212] audit: type=1800 audit(1668517426.182:2): pid=8100 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor348" name="bus" dev="loop0" ino=1296 res=0 [ 34.166622] attempt to access beyond end of device [ 34.172113] loop0: rw=2049, want=2138, limit=2048 [ 34.177036] Buffer I/O error on dev loop0, logical block 2137, lost async page write [ 34.185810] attempt to access beyond end of device [ 34.191011] loop0: rw=2049, want=2140, limit=2048 [ 34.195847] Buffer I/O error on dev loop0, logical block 2139, lost async page write [ 34.203836] attempt to access beyond end of device [ 34.209206] loop0: rw=2049, want=2142, limit=2048 [ 34.214054] Buffer I/O error on dev loop0, logical block 2141, lost async page write [ 34.222045] attempt to access beyond end of device [ 34.226972] loop0: rw=2049, want=2147, limit=2048 [ 34.231962] Buffer I/O error on dev loop0, logical block 2146, lost async page write [ 34.240478] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 [ 34.248433] PGD a49dd067 P4D a49dd067 PUD b3f84067 PMD 0 [ 34.254073] Oops: 0002 [#1] PREEMPT SMP KASAN [ 34.258559] CPU: 0 PID: 8100 Comm: syz-executor348 Not tainted 4.19.211-syzkaller #0 [ 34.266415] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 34.275757] RIP: 0010:udf_getblk+0x1c1/0x390 [ 34.280141] Code: e5 01 89 ee e8 90 f5 f2 fe 40 84 ed 0f 84 00 01 00 00 e8 52 f4 f2 fe 31 d2 be 74 01 00 00 48 c7 c7 a0 80 9a 88 e8 ff e3 d1 fe 49 0f ba 2c 24 02 40 0f 92 c5 31 ff 89 ee e8 5b f5 f2 fe 40 84 [ 34.299024] RSP: 0018:ffff88809595f968 EFLAGS: 00010246 [ 34.304364] RAX: 0000000000000007 RBX: 1ffff11012b2bf2f RCX: 0000000000000001 [ 34.311611] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff8880b2be8124 [ 34.318861] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 [ 34.326110] R10: 0000000000000001 R11: 0000000014bb57f4 R12: 0000000000000000 [ 34.333358] R13: ffff88808df57bc0 R14: ffff88808df57be8 R15: dffffc0000000000 [ 34.340606] FS: 0000555556502300(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 34.348806] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.354664] CR2: 0000000000000000 CR3: 000000009a145000 CR4: 00000000003406f0 [ 34.361915] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.369168] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.376413] Call Trace: [ 34.378982] ? udf_get_block+0x650/0x650 [ 34.383033] ? check_preemption_disabled+0x41/0x280 [ 34.388029] ? check_preemption_disabled+0x41/0x280 [ 34.393025] udf_bread+0x85/0x240 [ 34.396461] ? udf_getblk+0x390/0x390 [ 34.400240] ? udf_write_aext+0x4a1/0x860 [ 34.404366] udf_add_entry+0xfda/0x2a20 [ 34.408320] ? udf_write_fi+0xf40/0xf40 [ 34.412283] ? __mark_inode_dirty+0x23f/0x1140 [ 34.416854] ? check_preemption_disabled+0x41/0x280 [ 34.421852] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 34.426846] ? __mark_inode_dirty+0x23f/0x1140 [ 34.431405] udf_mkdir+0x2c7/0x650 [ 34.434926] ? udf_create+0x180/0x180 [ 34.438706] ? putname+0xe1/0x120 [ 34.442140] ? generic_permission+0x116/0x4d0 [ 34.446624] ? security_inode_permission+0xc5/0xf0 [ 34.451535] ? inode_permission.part.0+0x10c/0x450 [ 34.456450] vfs_mkdir+0x508/0x7a0 [ 34.459987] do_mkdirat+0x262/0x2d0 [ 34.463591] ? __ia32_sys_mknod+0x120/0x120 [ 34.467892] ? trace_hardirqs_off_caller+0x6e/0x210 [ 34.472887] ? do_syscall_64+0x21/0x620 [ 34.476847] do_syscall_64+0xf9/0x620 [ 34.480630] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.485800] RIP: 0033:0x7fa24bdce649 [ 34.489496] 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 [ 34.508466] RSP: 002b:00007ffe75c81f38 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 [ 34.516160] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa24bdce649 [ 34.523414] RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000006 [ 34.530668] RBP: 00007fa24bd8dc20 R08: 0000000000000000 R09: 0000000000000000 [ 34.538013] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa24bd8dcb0 [ 34.545266] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 34.552514] Modules linked in: [ 34.555685] CR2: 0000000000000000 [ 34.559119] ---[ end trace 7f943c7746816558 ]--- [ 34.563858] RIP: 0010:udf_getblk+0x1c1/0x390 [ 34.568246] Code: e5 01 89 ee e8 90 f5 f2 fe 40 84 ed 0f 84 00 01 00 00 e8 52 f4 f2 fe 31 d2 be 74 01 00 00 48 c7 c7 a0 80 9a 88 e8 ff e3 d1 fe 49 0f ba 2c 24 02 40 0f 92 c5 31 ff 89 ee e8 5b f5 f2 fe 40 84 [ 34.587128] RSP: 0018:ffff88809595f968 EFLAGS: 00010246 [ 34.592503] RAX: 0000000000000007 RBX: 1ffff11012b2bf2f RCX: 0000000000000001 [ 34.599751] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff8880b2be8124 [ 34.606998] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 [ 34.614245] R10: 0000000000000001 R11: 0000000014bb57f4 R12: 0000000000000000 [ 34.621498] R13: ffff88808df57bc0 R14: ffff88808df57be8 R15: dffffc0000000000 [ 34.628746] FS: 0000555556502300(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 34.636960] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.642817] CR2: 0000000000000000 CR3: 000000009a145000 CR4: 00000000003406f0 [ 34.650068] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.657316] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.664655] Kernel panic - not syncing: Fatal exception [ 34.670220] Kernel Offset: disabled [ 34.673916] Rebooting in 86400 seconds..