audit: type=1400 audit(1540038401.872:9): avc: denied { map } for pid=1802 comm="syz-execprog" path="/root/syzkaller-shm494866241" 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: 1 PID: 7610 Comm: syz-executor2 Not tainted 4.14.77+ #21
task: ffff8801c9bec680 task.stack: ffff8801c84f0000
RIP: 0010:reset_buffer_flags+0x21/0x150 drivers/tty/n_tty.c:323
RSP: 0018:ffff8801c84f78e0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 000000000000044c RSI: ffff8801c9becf00 RDI: 0000000000002260
RBP: ffff8801ccfda200 R08: 0000000000003624 R09: ffffffff950df7c0
R10: ffff8801c9becf00 R11: 0000000000000001 R12: ffff8801ccfda438
R13: ffff8801c84f7938 R14: ffff8801d60ae4a0 R15: 000000000000000b
FS: 00007fa1d5e32700(0000) GS:ffff8801dbb00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc7273afbc CR3: 00000001ca4cc006 CR4: 00000000001606a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
n_tty_flush_buffer+0x49/0xeb drivers/tty/n_tty.c:361
set_termios+0x259/0x440 drivers/tty/tty_ioctl.c:403
tty_mode_ioctl+0x238/0x920 drivers/tty/tty_ioctl.c:744
n_tty_ioctl_helper+0x3f/0x350 drivers/tty/tty_ioctl.c:939
n_tty_ioctl+0x43/0x2e0 drivers/tty/n_tty.c:2452
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:00007fa1d5e31c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569
RDX: 0000000020000000 RSI: 0000000000005404 RDI: 0000000000000005
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa1d5e326d4
R13: 00000000004c0da4 R14: 00000000004d17d0 R15: 00000000ffffffff
Code: 41 ff 5b 5d e9 81 b6 5e ff 90 53 48 89 fb e8 77 b6 5e ff 48 8d bb 60 22 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 0f 01 00 00 48 c7 83 60 22 00 00 00 00 00 00
RIP: reset_buffer_flags+0x21/0x150 drivers/tty/n_tty.c:323 RSP: ffff8801c84f78e0
---[ end trace d0396a3043962b80 ]---