netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'.
==================================================================
BUG: KASAN: slab-out-of-bounds in init_module_from_file+0x630/0x6b0
Read of size 8 at addr ffff888047c47e20 by task syz-executor.3/8869
CPU: 1 PID: 8869 Comm: syz-executor.3 Not tainted 6.4.0-next-20230630 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0x91/0xf0
print_report+0xcc/0x620
kasan_report+0xbe/0xf0
init_module_from_file+0x630/0x6b0
__x64_sys_finit_module+0xee/0x160
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7ff9f53b8b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff9f292e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 00007ff9f54cbf60 RCX: 00007ff9f53b8b19
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003
RBP: 00007ff9f5412f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe0e009faf R14: 00007ff9f292e300 R15: 0000000000022000
Allocated by task 8794:
kasan_save_stack+0x22/0x50
kasan_set_track+0x25/0x30
__kasan_slab_alloc+0x59/0x70
kmem_cache_alloc+0x16b/0x370
getname_flags.part.0+0x50/0x4f0
getname+0x92/0xe0
do_sys_openat2+0xec/0x1d0
__x64_sys_openat+0x143/0x200
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x6e/0xd8
Freed by task 8794:
kasan_save_stack+0x22/0x50
kasan_set_track+0x25/0x30
kasan_save_free_info+0x2b/0x50
__kasan_slab_free+0x10a/0x190
kmem_cache_free+0x10d/0x4d0
putname+0x102/0x140
do_sys_openat2+0x14a/0x1d0
__x64_sys_openat+0x143/0x200
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x6e/0xd8
The buggy address belongs to the object at ffff888047c46600
which belongs to the cache names_cache of size 4096
The buggy address is located 2080 bytes to the right of
allocated 4096-byte region [ffff888047c46600, ffff888047c47600)
The buggy address belongs to the physical page:
page:0000000039fa3bbf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x47c40
head:0000000039fa3bbf order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x100000000010200(slab|head|node=0|zone=1)
page_type: 0xffffffff()
raw: 0100000000010200 ffff8880087ba3c0 ffffea00011e6800 dead000000000002
raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888047c47d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888047c47d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888047c47e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff888047c47e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888047c47f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
general protection fault, probably for non-canonical address 0xe6e4028407068405: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: maybe wild-memory-access in range [0x3720342038342028-0x372034203834202f]
CPU: 1 PID: 8869 Comm: syz-executor.3 Tainted: G B 6.4.0-next-20230630 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:init_module_from_file+0x1c1/0x6b0
Code: 0f 84 c4 01 00 00 e8 5e 36 12 00 4d 89 e7 49 83 ef 08 74 61 e8 50 36 12 00 4c 89 fa 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 5d 04 00 00 4d 3b 2f 0f 84 ae 00 00 00 e8 27 36
RSP: 0018:ffff8880191afd28 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: 000000000000003b RCX: ffffc90002bf9000
RDX: 06e4068407068405 RSI: ffffffff813a30f0 RDI: ffffffff851f84c8
RBP: ffff88800ed2e000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888047c47e28
R13: ffff888008937740 R14: ffffffff87b7be78 R15: 372034203834202a
FS: 00007ff9f292e700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff9f54c7194 CR3: 0000000044c90000 CR4: 0000000000350ee0
Call Trace:
__x64_sys_finit_module+0xee/0x160
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7ff9f53b8b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff9f292e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 00007ff9f54cbf60 RCX: 00007ff9f53b8b19
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003
RBP: 00007ff9f5412f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe0e009faf R14: 00007ff9f292e300 R15: 0000000000022000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:init_module_from_file+0x1c1/0x6b0
Code: 0f 84 c4 01 00 00 e8 5e 36 12 00 4d 89 e7 49 83 ef 08 74 61 e8 50 36 12 00 4c 89 fa 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 5d 04 00 00 4d 3b 2f 0f 84 ae 00 00 00 e8 27 36
RSP: 0018:ffff8880191afd28 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: 000000000000003b RCX: ffffc90002bf9000
RDX: 06e4068407068405 RSI: ffffffff813a30f0 RDI: ffffffff851f84c8
RBP: ffff88800ed2e000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888047c47e28
R13: ffff888008937740 R14: ffffffff87b7be78 R15: 372034203834202a
FS: 00007ff9f292e700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff9f54c7194 CR3: 0000000044c90000 CR4: 0000000000350ee0
note: syz-executor.3[8869] exited with preempt_count 1
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'.
----------------
Code disassembly (best guess):
0: 0f 84 c4 01 00 00 je 0x1ca
6: e8 5e 36 12 00 callq 0x123669
b: 4d 89 e7 mov %r12,%r15
e: 49 83 ef 08 sub $0x8,%r15
12: 74 61 je 0x75
14: e8 50 36 12 00 callq 0x123669
19: 4c 89 fa mov %r15,%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: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 5d 04 00 00 jne 0x491
34: 4d 3b 2f cmp (%r15),%r13
37: 0f 84 ae 00 00 00 je 0xeb
3d: e8 .byte 0xe8
3e: 27 (bad)
3f: 36 ss