syzbot

RDX: 00000000200004c0 RSI: 0000000020000480 RDI: 0000000020000440
RBP: 0000000000000000 R08: 00000000fffffffb R09: 0000000000000039
R10: 0000000000000311 R11: 0000000000000246 R12: 00000000006dbc80
R13: 00007f8cbfb88d80 R14: 000000000000000c R15: 0079656b5f676962
CPU: 1 PID: 4577 Comm: syz-executor740 Not tainted 4.17.0+ #17
BUG: unable to handle kernel NULL pointer dereference
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 at 0000000000000008
PGD 800000018e96e067 
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:113
P4D 800000018e96e067 PUD 19cc19067 
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x87b/0xab0 lib/fault-inject.c:149
PMD 0 
 __should_failslab+0x278/0x2a0 mm/failslab.c:32
Oops: 0000 [#1] SMP PTI
 should_failslab+0x29/0x70 mm/slab_common.c:1522
Dumping ftrace buffer:
 slab_pre_alloc_hook mm/slab.h:423 [inline]
 slab_alloc_node mm/slub.c:2679 [inline]
 __kmalloc_node+0x22f/0x1200 mm/slub.c:3859
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 4584 Comm: syz-executor740 Not tainted 4.17.0+ #17
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:map_vm_area+0x69/0x1f0 mm/vmalloc.c:1353
 kmalloc_node include/linux/slab.h:554 [inline]
 alloc_vmap_area+0x1e6/0x15a0 mm/vmalloc.c:420
RSP: 0018:ffff8801925ff8b8 EFLAGS: 00010046
 __get_vm_area_node+0x3a6/0x810 mm/vmalloc.c:1410
RAX: ffffffff81b1e4bc RBX: 0000000000000000 RCX: ffff88019449ba80
RDX: 0000000000000000 RSI: 8000000000000063 RDI: 0000000000000000
 get_vm_area_caller+0xdb/0xf0 mm/vmalloc.c:1456
RBP: ffff8801925ff930 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc900019fffff R11: 0000000000000000 R12: ffffffff8b58d000
R13: 0000000000000000 R14: 0000000000000008 R15: 0000000000000000
FS:  00007f8cbfb89700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000008 CR3: 000000019cc1a000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 kmsan_vmap+0x79/0x1e0 mm/kmsan/kmsan.c:875
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 vmap+0x3b2/0x4b0 mm/vmalloc.c:1661
 kmsan_vmap+0x137/0x1e0 mm/kmsan/kmsan.c:888
 vmap+0x3b2/0x4b0 mm/vmalloc.c:1661
 big_key_alloc_buffer+0x638/0xa30 security/keys/big_key.c:188
 big_key_preparse+0x20a/0xed0 security/keys/big_key.c:228
 big_key_alloc_buffer+0x638/0xa30 security/keys/big_key.c:188
 big_key_preparse+0x20a/0xed0 security/keys/big_key.c:228
 key_create_or_update+0x7a6/0x1a80 security/keys/key.c:849
 __do_sys_add_key security/keys/keyctl.c:122 [inline]
 __se_sys_add_key+0x741/0x980 security/keys/keyctl.c:62
 key_create_or_update+0x7a6/0x1a80 security/keys/key.c:849
 __do_sys_add_key security/keys/keyctl.c:122 [inline]
 __se_sys_add_key+0x741/0x980 security/keys/keyctl.c:62
 __x64_sys_add_key+0x15d/0x1b0 security/keys/keyctl.c:62
 __x64_sys_add_key+0x15d/0x1b0 security/keys/keyctl.c:62
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x445cf9
RIP: 0033:0x445cf9
RSP: 002b:00007f8cbfb88d78 EFLAGS: 00000246
RSP: 002b:00007f8cbfba9d78 EFLAGS: 00000246
 ORIG_RAX: 00000000000000f8
RAX: ffffffffffffffda RBX: 00000000006dbc84 RCX: 0000000000445cf9
 ORIG_RAX: 00000000000000f8
RDX: 00000000200004c0 RSI: 0000000020000480 RDI: 0000000020000440
RBP: 0000000000000000 R08: 00000000fffffffb R09: 0000000000000039
RAX: ffffffffffffffda RBX: 00000000006dbc6c RCX: 0000000000445cf9
R10: 0000000000000311 R11: 0000000000000246 R12: 00000000006dbc80
R13: 00007f8cbfb88d80 R14: 000000000000000c R15: 0079656b5f676962
RDX: 00000000200004c0 RSI: 0000000020000480 RDI: 0000000020000440
Code: 
RBP: 0000000000000000 R08: 00000000fffffffb R09: 0000000000000039
24 08 
R10: 0000000000000311 R11: 0000000000000246 R12: 00000000006dbc68
48 89 
R13: 00007f8cbfba9d80 R14: 000000000000000a R15: 0079656b5f676962
45 
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
a0 41 8b 84 24 90 0c 00 00 89 45 cc 45 8b bc 
CPU: 1 PID: 4570 Comm: syz-executor740 Not tainted 4.17.0+ #17
24 88 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
0c 00 
Call Trace:
00 e8 
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:113
54 fa 
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x87b/0xab0 lib/fault-inject.c:149
b3 ff 
 __should_failslab+0x278/0x2a0 mm/failslab.c:32
4d 8d 
 should_failslab+0x29/0x70 mm/slab_common.c:1522
75 08 
 slab_pre_alloc_hook mm/slab.h:423 [inline]
 slab_alloc_node mm/slub.c:2679 [inline]
 __kmalloc_node+0x22f/0x1200 mm/slub.c:3859
48 85 
db 
0f 85 
5b 01 
 kmalloc_node include/linux/slab.h:554 [inline]
 alloc_vmap_area+0x1e6/0x15a0 mm/vmalloc.c:420
00 
 __get_vm_area_node+0x3a6/0x810 mm/vmalloc.c:1410
00 <49> 
 get_vm_area_caller+0xdb/0xf0 mm/vmalloc.c:1456
8b 45 
08 48 
89 45 
a8 4c 
 kmsan_vmap+0x79/0x1e0 mm/kmsan/kmsan.c:875
89 f7 
 vmap+0x3b2/0x4b0 mm/vmalloc.c:1661
e8 57 
bd 0e 
 big_key_alloc_buffer+0x638/0xa30 security/keys/big_key.c:188
00 4d 
 big_key_preparse+0x20a/0xed0 security/keys/big_key.c:228
8d 75 
18 48 
 key_create_or_update+0x7a6/0x1a80 security/keys/key.c:849
RIP: map_vm_area+0x69/0x1f0 mm/vmalloc.c:1353 RSP: ffff8801925ff8b8
 __do_sys_add_key security/keys/keyctl.c:122 [inline]
 __se_sys_add_key+0x741/0x980 security/keys/keyctl.c:62
CR2: 0000000000000008
---[ end trace f879655fe83b1a92 ]---