audit: type=1400 audit(1512670243.075:7): avc: denied { map } for pid=3152 comm="syzkaller541390" path="/root/syzkaller541390333" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_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] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 3152 Comm: syzkaller541390 Not tainted 4.15.0-rc2+ #122 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:string+0xb4/0x200 lib/vsprintf.c:595 RSP: 0018:ffff8801c4b475e0 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: fffffffffffffffe RCX: ffffffff8513b85f RDX: 000dccad8dce4e8e RSI: 1ffff10038968e01 RDI: ffff8801c4b47600 RBP: ffff8801c4b47630 R08: ffffed0038709c36 R09: ffffed0038709c36 R10: 0000000000000002 R11: ffffed0038709c35 R12: 006e656c6e727474 R13: 006e656c6e727473 R14: ffffffffffffffff R15: ffff8801c384e1aa FS: 0000000000000000(0000) GS:ffff8801db400000(0063) knlGS:0000000009e61840 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000205e2ff0 CR3: 00000001c43ca000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vsnprintf+0x863/0x1900 lib/vsprintf.c:2282 seq_vprintf+0xe3/0x1a0 fs/seq_file.c:397 seq_printf+0xb3/0xe0 fs/seq_file.c:412 show_timer+0x1ee/0x2b0 fs/proc/base.c:2274 traverse+0x248/0xa00 fs/seq_file.c:111 seq_read+0x96a/0x13d0 fs/seq_file.c:189 do_loop_readv_writev fs/read_write.c:673 [inline] do_iter_read+0x3db/0x5b0 fs/read_write.c:897 compat_readv+0x1bf/0x270 fs/read_write.c:1140 do_compat_preadv64+0xdc/0x100 fs/read_write.c:1189 C_SYSC_preadv fs/read_write.c:1209 [inline] compat_SyS_preadv+0x3b/0x50 fs/read_write.c:1203 do_syscall_32_irqs_on arch/x86/entry/common.c:327 [inline] do_fast_syscall_32+0x3ee/0xf9d arch/x86/entry/common.c:389 entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:125 RIP: 0023:0xf7f82c79 RSP: 002b:00000000ffc4ad4c EFLAGS: 00000296 ORIG_RAX: 000000000000014d RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000205e2ff0 RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000010000 RBP: 0000000020adafa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Code: 01 00 00 e8 bf 7f 5c fc 4d 85 f6 0f 84 10 01 00 00 e8 b1 7f 5c fc 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 4d 8d 65 01 48 c1 ea 03 <0f> b6 04 02 4c 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 ec 00 00 RIP: string+0xb4/0x200 lib/vsprintf.c:595 RSP: ffff8801c4b475e0 ---[ end trace d8fe707f5fc174f1 ]---