[  OK  ] Started Getty on tty5.
[  OK  ] Started Getty on tty4.
[  OK  ] Started Getty on tty3.
[  OK  ] Started Serial Getty on ttyS0.
[  OK  ] Started Getty on tty2.
[  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 '10.128.0.222' (ECDSA) to the list of known hosts.
syzkaller login: [   32.839895] IPVS: ftp: loaded support on port[0] = 21
executing program
[   32.893922] ------------[ cut here ]------------
[   32.898975] kernel BUG at drivers/dma-buf/dma-buf.c:68!
[   32.904546] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[   32.909909] CPU: 0 PID: 8102 Comm: syz-executor205 Not tainted 4.19.211-syzkaller #0
[   32.917795] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
[   32.927148] RIP: 0010:dma_buf_release+0x345/0x630
[   32.931974] Code: e4 e8 9f 29 52 fd 48 89 ef e8 e7 3a 91 fd e8 42 8c 5b fd 44 89 e0 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 2b 8c 5b fd <0f> 0b e8 24 8c 5b fd e8 9f a4 49 fd 48 8d bd 38 02 00 00 48 b8 00
[   32.950862] RSP: 0018:ffff888095117df0 EFLAGS: 00010293
[   32.956206] RAX: ffff888096f44200 RBX: 0000000000000004 RCX: ffffffff8406f6ec
[   32.963469] RDX: 0000000000000000 RSI: ffffffff8406f945 RDI: 0000000000000005
[   32.970719] RBP: ffff888099042940 R08: 0000000000000000 R09: 0000000000000000
[   32.978002] R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880b31fa3bc
[   32.985253] R13: ffff8880b31fa368 R14: ffffffff8406f600 R15: ffff8880b5b84620
[   32.992505] FS:  00005555572d0300(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
[   33.000708] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.006566] CR2: 00007efda30c0370 CR3: 00000000a4c1a000 CR4: 00000000003406f0
[   33.013818] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.021068] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.028314] Call Trace:
[   33.030887]  ? ima_file_free+0xb6/0x460
[   33.034858]  ? dma_buf_detach+0x240/0x240
[   33.038986]  __fput+0x2ce/0x890
[   33.042245]  task_work_run+0x148/0x1c0
[   33.046110]  exit_to_usermode_loop+0x251/0x2a0
[   33.050671]  do_syscall_64+0x538/0x620
[   33.054539]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   33.059708] RIP: 0033:0x7efda30a9693
[   33.063414] Code: c7 c2 c0 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb ba 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8
[   33.082308] RSP: 002b:00007ffd68ed3778 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[   33.089995] RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007efda30a9693
[   33.097245] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000003
[   33.104492] RBP: 00007ffd68ed3788 R08: 0000000000000000 R09: 00007efda3158e40
[   33.111748] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd68ed3790
[   33.119193] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   33.126443] Modules linked in:
[   33.129689] ---[ end trace bdf1b5d6f7d236f8 ]---
[   33.134657] RIP: 0010:dma_buf_release+0x345/0x630
[   33.139499] Code: e4 e8 9f 29 52 fd 48 89 ef e8 e7 3a 91 fd e8 42 8c 5b fd 44 89 e0 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 2b 8c 5b fd <0f> 0b e8 24 8c 5b fd e8 9f a4 49 fd 48 8d bd 38 02 00 00 48 b8 00
[   33.158619] RSP: 0018:ffff888095117df0 EFLAGS: 00010293
[   33.164042] RAX: ffff888096f44200 RBX: 0000000000000004 RCX: ffffffff8406f6ec
[   33.171294] RDX: 0000000000000000 RSI: ffffffff8406f945 RDI: 0000000000000005
[   33.178631] RBP: ffff888099042940 R08: 0000000000000000 R09: 0000000000000000
[   33.185962] R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880b31fa3bc
[   33.193257] R13: ffff8880b31fa368 R14: ffffffff8406f600 R15: ffff8880b5b84620
[   33.200541] FS:  00005555572d0300(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
[   33.209056] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.215149] CR2: 00007efda30c0370 CR3: 00000000a4c1a000 CR4: 00000000003406f0
[   33.222451] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.229720] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.237014] Kernel panic - not syncing: Fatal exception
[   33.242538] Kernel Offset: disabled
[   33.246498] Rebooting in 86400 seconds..