audit: type=1400 audit(1544072758.387:9): avc:  denied  { map } for  pid=1820 comm="syz-execprog" path="/root/syzkaller-shm841920427" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 0 PID: 5052 Comm: syz-executor4 Not tainted 4.14.86+ #16
task: ffff8881d39ade00 task.stack: ffff8881d1d38000
RIP: 0010:n_tty_set_termios+0x291/0xcb0 drivers/tty/n_tty.c:1815
RSP: 0018:ffff8881d1d3f7f8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffffffff594b886
RDX: 000000000000000b RSI: ffff8881d1d3f878 RDI: ffff8881d1d3f884
RBP: ffff8881d59baa80 R08: 0000000000000001 R09: 0000000000000000
R10: ffff8881d39ae680 R11: 0000000000000001 R12: ffff8881d59bae34
R13: 0000000000000001 R14: 000000000000005d R15: ffff8881d1d3f878
FS:  00007fe277374700(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f496e28dab0 CR3: 00000001d2f12005 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 tty_set_termios+0x5fd/0x860 drivers/tty/tty_ioctl.c:340
 set_termios+0x2bf/0x440 drivers/tty/tty_ioctl.c:413
 tty_mode_ioctl+0x870/0x920 drivers/tty/tty_ioctl.c:748
 n_tty_ioctl_helper+0x3f/0x350 drivers/tty/tty_ioctl.c:939
 n_tty_ioctl+0x43/0x2e0 drivers/tty/n_tty.c:2466
 tty_ioctl+0x551/0x13e0 drivers/tty/tty_io.c:2659
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x1a0/0x1030 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7e/0xb0 fs/ioctl.c:692
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x457569
RSP: 002b:00007fe277373c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569
RDX: 0000000020000000 RSI: 0000000000005402 RDI: 0000000000000005
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe2773746d4
R13: 00000000004c10be R14: 00000000004d2270 R15: 00000000ffffffff
Code: d2 0f 85 14 09 00 00 44 8b ad b4 03 00 00 e8 27 a2 5d ff 4c 89 f2 41 d1 ed 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 41 83 e5 01 <0f> b6 04 02 4c 89 f2 83 e2 07 38 d0 7f 08 84 c0 0f 85 f1 07 00 
RIP: n_tty_set_termios+0x291/0xcb0 drivers/tty/n_tty.c:1815 RSP: ffff8881d1d3f7f8
---[ end trace e846c13530128f86 ]---