FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 1
CPU: 0 UID: 0 PID: 5340 Comm: syz.0.0 Not tainted 6.16.0-rc4-syzkaller-00324-g1f988d0788f5 #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
fail_dump lib/fault-inject.c:73 [inline]
should_fail_ex+0x414/0x560 lib/fault-inject.c:174
should_failslab+0xa8/0x100 mm/failslab.c:46
slab_pre_alloc_hook mm/slub.c:4101 [inline]
slab_alloc_node mm/slub.c:4177 [inline]
__kmalloc_cache_noprof+0x70/0x3d0 mm/slub.c:4354
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
alloc_resource kernel/resource.c:177 [inline]
__request_region+0x5f/0xe0 kernel/resource.c:1320
__comedi_request_region drivers/comedi/drivers.c:884 [inline]
comedi_request_region+0x6d/0x180 drivers/comedi/drivers.c:914
pcl818_attach+0xca/0x15b0 drivers/comedi/drivers/pcl818.c:991
comedi_device_attach+0x520/0x670 drivers/comedi/drivers.c:996
do_devconfig_ioctl drivers/comedi/comedi_fops.c:855 [inline]
comedi_unlocked_ioctl+0x686/0xf40 drivers/comedi/comedi_fops.c:2136
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb91318e929
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb913f25038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb9133b5fa0 RCX: 00007fb91318e929
RDX: 0000200000000080 RSI: 0000000040946400 RDI: 0000000000000003
RBP: 00007fb913f25090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007fb9133b5fa0 R15: 00007ffc778ffeb8
comedi comedi1: pcl818: I/O port conflict (0x2f00,16)
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]
CPU: 0 UID: 0 PID: 5340 Comm: syz.0.0 Not tainted 6.16.0-rc4-syzkaller-00324-g1f988d0788f5 #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:pcl818_ai_cancel+0x69/0x3f0 drivers/comedi/drivers/pcl818.c:762
Code: 8b 1b 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 19 f6 42 f9 48 8b 03 48 89 04 24 49 83 c4 28 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 f8 f5 42 f9 4d 8b 24 24 48 83 c3
RSP: 0018:ffffc9000d66f9f0 EFLAGS: 00010206
RAX: 0000000000000005 RBX: ffff888011800080 RCX: ffff888000aac880
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88803ee14000
RBP: 0000000000000001 R08: ffff88803ee1412f R09: 1ffff11007dc2825
R10: dffffc0000000000 R11: ffffffff88e0c5b0 R12: 0000000000000028
R13: dffffc0000000000 R14: ffff88803ee14000 R15: dffffc0000000000
FS: 00007fb913f256c0(0000) GS:ffff88808d21c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb913eed9b8 CR3: 0000000043a54000 CR4: 0000000000352ef0
Call Trace:
pcl818_detach+0x66/0xd0 drivers/comedi/drivers/pcl818.c:1115
comedi_device_detach+0x134/0x720 drivers/comedi/drivers.c:207
comedi_device_attach+0x568/0x670 drivers/comedi/drivers.c:1000
do_devconfig_ioctl drivers/comedi/comedi_fops.c:855 [inline]
comedi_unlocked_ioctl+0x686/0xf40 drivers/comedi/comedi_fops.c:2136
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb91318e929
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb913f25038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb9133b5fa0 RCX: 00007fb91318e929
RDX: 0000200000000080 RSI: 0000000040946400 RDI: 0000000000000003
RBP: 00007fb913f25090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007fb9133b5fa0 R15: 00007ffc778ffeb8
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pcl818_ai_cancel+0x69/0x3f0 drivers/comedi/drivers/pcl818.c:762
Code: 8b 1b 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 19 f6 42 f9 48 8b 03 48 89 04 24 49 83 c4 28 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 f8 f5 42 f9 4d 8b 24 24 48 83 c3
RSP: 0018:ffffc9000d66f9f0 EFLAGS: 00010206
RAX: 0000000000000005 RBX: ffff888011800080 RCX: ffff888000aac880
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88803ee14000
RBP: 0000000000000001 R08: ffff88803ee1412f R09: 1ffff11007dc2825
R10: dffffc0000000000 R11: ffffffff88e0c5b0 R12: 0000000000000028
R13: dffffc0000000000 R14: ffff88803ee14000 R15: dffffc0000000000
FS: 00007fb913f256c0(0000) GS:ffff88808d21c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb913eed9b8 CR3: 0000000043a54000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
0: 8b 1b mov (%rbx),%ebx
2: 48 89 d8 mov %rbx,%rax
5: 48 c1 e8 03 shr $0x3,%rax
9: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
e: 74 08 je 0x18
10: 48 89 df mov %rbx,%rdi
13: e8 19 f6 42 f9 call 0xf942f631
18: 48 8b 03 mov (%rbx),%rax
1b: 48 89 04 24 mov %rax,(%rsp)
1f: 49 83 c4 28 add $0x28,%r12
23: 4c 89 e0 mov %r12,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 4c 89 e7 mov %r12,%rdi
34: e8 f8 f5 42 f9 call 0xf942f631
39: 4d 8b 24 24 mov (%r12),%r12
3d: 48 rex.W
3e: 83 .byte 0x83
3f: c3 ret