==================================================================
BUG: KASAN: null-ptr-deref in io_unregister_personality+0x3a/0x90
Write of size 8 at addr 0000000000000406 by task syz-executor.2/19748
CPU: 0 UID: 0 PID: 19748 Comm: syz-executor.2 Not tainted 6.13.0-rc1-next-20241203 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xca/0x120
kasan_report+0xbd/0xf0
kasan_check_range+0x39/0x1b0
io_unregister_personality+0x3a/0x90
__io_uring_register+0x17a8/0x2270
__x64_sys_io_uring_register+0x169/0x2a0
do_syscall_64+0xbf/0x1d0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f58ffd03b19
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:00007f58fd279188 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab
RAX: ffffffffffffffda RBX: 00007f58ffe16f60 RCX: 00007f58ffd03b19
RDX: 0000000000000000 RSI: 000000000000000a RDI: 0000000000000003
RBP: 00007f58ffd5df6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd58e8518f R14: 00007f58fd279300 R15: 0000000000022000
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000406
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 3f3df067 P4D 3f3df067 PUD e05d067 PMD 0
Oops: Oops: 0002 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 19748 Comm: syz-executor.2 Tainted: G B 6.13.0-rc1-next-20241203 #1
Tainted: [B]=BAD_PAGE
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:io_unregister_personality+0x3a/0x90
Code: 2d ff 89 de 48 8d bd 40 05 00 00 e8 90 ad 5e 02 48 85 c0 74 5d 48 89 c5 e8 43 43 2d ff be 08 00 00 00 48 89 ef e8 f6 34 67 ff 48 83 6d 00 01 0f 94 c3 31 ff 45 31 e4 89 de e8 f1 45 2d ff 84
RSP: 0018:ffff8880162d7d28 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc900007db000
RDX: 0000000000040000 RSI: ffffffff818ba495 RDI: 0000000000000007
RBP: 0000000000000406 R08: 0000000000000001 R09: fffffbfff0efaa58
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 000000000000000a R14: ffff88803f0c8004 R15: 000000000000000a
FS: 00007f58fd279700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000406 CR3: 0000000013384000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
__io_uring_register+0x17a8/0x2270
__x64_sys_io_uring_register+0x169/0x2a0
do_syscall_64+0xbf/0x1d0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f58ffd03b19
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:00007f58fd279188 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab
RAX: ffffffffffffffda RBX: 00007f58ffe16f60 RCX: 00007f58ffd03b19
RDX: 0000000000000000 RSI: 000000000000000a RDI: 0000000000000003
RBP: 00007f58ffd5df6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd58e8518f R14: 00007f58fd279300 R15: 0000000000022000
Modules linked in:
CR2: 0000000000000406
---[ end trace 0000000000000000 ]---
RIP: 0010:io_unregister_personality+0x3a/0x90
Code: 2d ff 89 de 48 8d bd 40 05 00 00 e8 90 ad 5e 02 48 85 c0 74 5d 48 89 c5 e8 43 43 2d ff be 08 00 00 00 48 89 ef e8 f6 34 67 ff 48 83 6d 00 01 0f 94 c3 31 ff 45 31 e4 89 de e8 f1 45 2d ff 84
RSP: 0018:ffff8880162d7d28 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc900007db000
RDX: 0000000000040000 RSI: ffffffff818ba495 RDI: 0000000000000007
RBP: 0000000000000406 R08: 0000000000000001 R09: fffffbfff0efaa58
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 000000000000000a R14: ffff88803f0c8004 R15: 000000000000000a
FS: 00007f58fd279700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000406 CR3: 0000000013384000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
note: syz-executor.2[19748] exited with irqs disabled
BUG: kernel NULL pointer dereference, address: 0000000000000406
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 3f3df067 P4D 3f3df067 PUD e05d067 PMD 0
Oops: Oops: 0002 [#2] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 19766 Comm: syz-executor.2 Tainted: G B D 6.13.0-rc1-next-20241203 #1
Tainted: [B]=BAD_PAGE, [D]=DIE
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:io_unregister_personality+0x3a/0x90
Code: 2d ff 89 de 48 8d bd 40 05 00 00 e8 90 ad 5e 02 48 85 c0 74 5d 48 89 c5 e8 43 43 2d ff be 08 00 00 00 48 89 ef e8 f6 34 67 ff 48 83 6d 00 01 0f 94 c3 31 ff 45 31 e4 89 de e8 f1 45 2d ff 84
RSP: 0018:ffff8880408a7d28 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff82249d1a
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000406
RBP: 0000000000000406 R08: 0000000000000001 R09: ffffed10081e10a8
R10: ffff888040f08543 R11: 0000000000000000 R12: 0000000000000000
R13: 000000000000000a R14: ffff888040f08004 R15: 000000000000000a
FS: 00007f58fd216700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000406 CR3: 0000000013384000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
__io_uring_register+0x17a8/0x2270
__x64_sys_io_uring_register+0x169/0x2a0
do_syscall_64+0xbf/0x1d0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f58ffd03b19
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:00007f58fd216188 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab
RAX: ffffffffffffffda RBX: 00007f58ffe171a0 RCX: 00007f58ffd03b19
RDX: 0000000000000000 RSI: 000000000000000a RDI: 0000000000000003
RBP: 00007f58ffd5df6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd58e8518f R14: 00007f58fd216300 R15: 0000000000022000
Modules linked in:
CR2: 0000000000000406
---[ end trace 0000000000000000 ]---
RIP: 0010:io_unregister_personality+0x3a/0x90
Code: 2d ff 89 de 48 8d bd 40 05 00 00 e8 90 ad 5e 02 48 85 c0 74 5d 48 89 c5 e8 43 43 2d ff be 08 00 00 00 48 89 ef e8 f6 34 67 ff 48 83 6d 00 01 0f 94 c3 31 ff 45 31 e4 89 de e8 f1 45 2d ff 84
RSP: 0018:ffff8880162d7d28 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc900007db000
RDX: 0000000000040000 RSI: ffffffff818ba495 RDI: 0000000000000007
RBP: 0000000000000406 R08: 0000000000000001 R09: fffffbfff0efaa58
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 000000000000000a R14: ffff88803f0c8004 R15: 000000000000000a
FS: 00007f58fd216700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000406 CR3: 0000000013384000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
note: syz-executor.2[19766] exited with irqs disabled
----------------
Code disassembly (best guess):
0: 2d ff 89 de 48 sub $0x48de89ff,%eax
5: 8d bd 40 05 00 00 lea 0x540(%rbp),%edi
b: e8 90 ad 5e 02 callq 0x25eada0
10: 48 85 c0 test %rax,%rax
13: 74 5d je 0x72
15: 48 89 c5 mov %rax,%rbp
18: e8 43 43 2d ff callq 0xff2d4360
1d: be 08 00 00 00 mov $0x8,%esi
22: 48 89 ef mov %rbp,%rdi
25: e8 f6 34 67 ff callq 0xff673520
* 2a: f0 48 83 6d 00 01 lock subq $0x1,0x0(%rbp) <-- trapping instruction
30: 0f 94 c3 sete %bl
33: 31 ff xor %edi,%edi
35: 45 31 e4 xor %r12d,%r12d
38: 89 de mov %ebx,%esi
3a: e8 f1 45 2d ff callq 0xff2d4630
3f: 84 .byte 0x84