==================================================================
BUG: KASAN: use-after-free in init_module_from_file+0x630/0x6b0
Read of size 8 at addr ffff88804a367e20 by task syz-executor.7/22366
CPU: 0 PID: 22366 Comm: syz-executor.7 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: 0033:0x7ff230b99b19
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:00007ff22e10f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 00007ff230cacf60 RCX: 00007ff230b99b19
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007ff230bf3f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd1ad59cbf R14: 00007ff22e10f300 R15: 0000000000022000
The buggy address belongs to the physical page:
page:0000000014d0aaa4 refcount:0 mapcount:0 mapping:0000000000000000 index:0x2 pfn:0x4a367
flags: 0x100000000000000(node=0|zone=1)
page_type: 0xffffffff()
raw: 0100000000000000 0000000000000000 ffffffff01280101 0000000000000000
raw: 0000000000000002 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88804a367d00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff88804a367d80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88804a367e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff88804a367e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff88804a367f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
general protection fault, probably for non-canonical address 0xeac826e83f43c1fd: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: maybe wild-memory-access in range [0x56415741fa1e0fe8-0x56415741fa1e0fef]
CPU: 0 PID: 22366 Comm: syz-executor.7 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:ffff888044ca7d28 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: 00000000000000fb RCX: ffffc90006bf7000
RDX: 0ac82ae83f43c1fd RSI: ffffffff813a30f0 RDI: ffffffff810811d0
RBP: ffff8880193d8000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 00000000000bdc60 R12: ffff88804a367e28
R13: ffff888019750c98 R14: ffffffff87b7c478 R15: 56415741fa1e0feb
FS: 00007ff22e10f700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31c22000 CR3: 0000000042520000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
__x64_sys_finit_module+0xee/0x160
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7ff230b99b19
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:00007ff22e10f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 00007ff230cacf60 RCX: 00007ff230b99b19
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007ff230bf3f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd1ad59cbf R14: 00007ff22e10f300 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:ffff888044ca7d28 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: 00000000000000fb RCX: ffffc90006bf7000
RDX: 0ac82ae83f43c1fd RSI: ffffffff813a30f0 RDI: ffffffff810811d0
RBP: ffff8880193d8000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 00000000000bdc60 R12: ffff88804a367e28
R13: ffff888019750c98 R14: ffffffff87b7c478 R15: 56415741fa1e0feb
FS: 00007ff22e10f700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31c22000 CR3: 0000000042520000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
note: syz-executor.7[22366] exited with preempt_count 1
audit: type=1326 audit(1688123374.179:28): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=22333 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fa689250b19 code=0x0
audit: type=1326 audit(1688123374.207:29): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=22335 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f78cc5eab19 code=0x0
audit: type=1326 audit(1688123374.453:30): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=22371 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fa689250b19 code=0x0
audit: type=1326 audit(1688123374.480:31): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=22375 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f78cc5eab19 code=0x0
----------------
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