audit: type=1800 audit(1654143726.834:609): pid=3149 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=16365 res=0 kasan: CONFIG_KASAN_INLINE enabled FAT-fs (loop0): invalid media value (0x00) FAT-fs (loop0): Can't find a valid FAT filesystem kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 3125 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:flex_array_get+0x27/0x250 lib/flex_array.c:320 Code: 90 90 90 41 56 41 55 41 54 55 89 f5 53 48 89 fb 48 83 ec 08 e8 1a a0 ee fd 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e b7 01 00 00 44 8b 2b 31 ff 44 RSP: 0018:ffff88809d4cf878 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff87770a90 RDX: 0000000000000000 RSI: ffffffff8373e556 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88805aeb10e8 R13: 0000000000000000 R14: ffff888099af5480 R15: 1ffff1100b5d6221 FS: 0000555555934400(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1f5b468000 CR3: 0000000098b55000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: sctp_stream_out include/net/sctp/structs.h:1474 [inline] sctp_sched_dequeue_done+0x1f8/0x2e0 net/sctp/stream_sched.c:255 __sctp_outq_teardown+0x6cc/0xc20 net/sctp/outqueue.c:268 sctp_association_free+0x212/0x7b0 net/sctp/associola.c:361 sctp_cmd_delete_tcb net/sctp/sm_sideeffect.c:944 [inline] sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1332 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline] sctp_do_sm+0x39ee/0x5110 net/sctp/sm_sideeffect.c:1170 sctp_primitive_SHUTDOWN+0x9b/0xc0 net/sctp/primitive.c:104 sctp_close+0x3d9/0x7f0 net/sctp/socket.c:1574 inet_release+0xd7/0x1e0 net/ipv4/af_inet.c:427 __sock_release+0xcd/0x2a0 net/socket.c:599 sock_close+0x15/0x20 net/socket.c:1214 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f578cfecd4b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007ffcfef09a60 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f578cfecd4b RDX: 0000000000000000 RSI: 0000001b2db21618 RDI: 0000000000000004 RBP: 00007f578d14e960 R08: 0000000000000000 R09: 000000009cab137d R10: 0000000000000000 R11: 0000000000000293 R12: 000000000006e6e5 R13: 00007ffcfef09b60 R14: 00007ffcfef09b80 R15: 0000000000000032 Modules linked in: ---[ end trace 283c12a1ab1eb7c1 ]--- RIP: 0010:flex_array_get+0x27/0x250 lib/flex_array.c:320 Code: 90 90 90 41 56 41 55 41 54 55 89 f5 53 48 89 fb 48 83 ec 08 e8 1a a0 ee fd 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e b7 01 00 00 44 8b 2b 31 ff 44 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) RSP: 0018:ffff88809d4cf878 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff87770a90 RDX: 0000000000000000 RSI: ffffffff8373e556 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88805aeb10e8 R13: 0000000000000000 R14: ffff888099af5480 R15: 1ffff1100b5d6221 FS: 0000555555934400(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 FAT-fs (loop0): bogus number of FAT sectors CR2: 00007ffc6859ddf8 CR3: 0000000098b55000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 FAT-fs (loop0): Can't find a valid FAT filesystem DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 41 56 push %r14 5: 41 55 push %r13 7: 41 54 push %r12 9: 55 push %rbp a: 89 f5 mov %esi,%ebp c: 53 push %rbx d: 48 89 fb mov %rdi,%rbx 10: 48 83 ec 08 sub $0x8,%rsp 14: e8 1a a0 ee fd callq 0xfdeea033 19: 48 89 da mov %rbx,%rdx 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 74 08 je 0x3a 32: 3c 03 cmp $0x3,%al 34: 0f 8e b7 01 00 00 jle 0x1f1 3a: 44 8b 2b mov (%rbx),%r13d 3d: 31 ff xor %edi,%edi 3f: 44 rex.R