[moderation] [sound?] general protection fault in azx_freeze_noirq
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syzbot
Aug 9, 2026, 8:13:27 PM (6 hours ago) Aug 9
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: cc2b5f627e8c Add linux-next specific files for 20260714
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=170f9bb9580000
kernel config: https://syzkaller.appspot.com/x/.config?x=2290ccbf984c524f
dashboard link: https://syzkaller.appspot.com/bug?extid=1b196987ee391142d653
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
CC: [linux-...@vger.kernel.org linux...@vger.kernel.org pe...@perex.cz ti...@suse.com]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/6836f8efb1da/disk-cc2b5f62.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0109d3477cc7/vmlinux-cc2b5f62.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c2e49e350bbf/bzImage-cc2b5f62.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1b1969...@syzkaller.appspotmail.com
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000032: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000190-0x0000000000000197]
CPU: 1 UID: 0 PID: 5874 Comm: kworker/u8:63 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: async async_run_entry_fn
RIP: 0010:azx_freeze_noirq+0x49/0x1b0 sound/hda/controllers/intel.c:1093
Code: 8d 73 78 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 b8 83 19 f9 4d 8b 36 49 8d be 90 01 00 00 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 9b 83 19 f9 4d 85 f6 0f 84 ca 00 00 00 4d
RSP: 0018:ffffc900066ffa00 EFLAGS: 00010202
RAX: 0000000000000032 RBX: ffff88801af9c0d0 RCX: ffff888031693e80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000190
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffffff891876a0 R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8c6fd3c0
FS: 0000000000000000(0000) GS:ffff888125af2000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd848c82f8 CR3: 000000005dca6000 CR4: 00000000003526f0
Call Trace:
<TASK>
pci_pm_freeze_noirq+0x10e/0x4d0 drivers/pci/pci-driver.c:1112
dpm_run_callback+0x84/0x2a0 drivers/base/power/main.c:510
device_suspend_noirq+0x574/0xba0 drivers/base/power/main.c:1534
async_suspend_noirq+0x20/0x30 drivers/base/power/main.c:1572
async_run_entry_fn+0x9d/0x430 kernel/async.c:129
process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
process_scheduled_works kernel/workqueue.c:3462 [inline]
worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Modules linked in:
------------[ cut here ]------------
console_irqwork_blocked
WARNING: kernel/printk/printk.c:4634 at __wake_up_klogd+0xf4/0x120 kernel/printk/printk.c:4634, CPU#1: kworker/u8:63/5874
Modules linked in:
CPU: 1 UID: 0 PID: 5874 Comm: kworker/u8:63 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: async async_run_entry_fn
RIP: 0010:__wake_up_klogd+0xf4/0x120 kernel/printk/printk.c:4634
Code: 92 ef ff 65 8b 1d 6c 7b 1e 11 31 ff 89 de e8 93 43 21 00 85 db 74 18 e8 da 3e 21 00 5b 5d e9 c3 8b af 09 cc e8 cd 3e 21 00 90 <0f> 0b 90 eb ed e8 c2 3e 21 00 e8 7d c0 8e ff eb e1 e8 b6 3e 21 00
RSP: 0018:ffffc900066ff868 EFLAGS: 00010093
RAX: ffffffff81a464e3 RBX: 0000000000000001 RCX: ffff888031693e80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900066ff948 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1fa1890 R12: dffffc0000000032
R13: 0000000000000001 R14: 0000000000000293 R15: ffffc900066ff958
FS: 0000000000000000(0000) GS:ffff888125af2000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd848c82f8 CR3: 000000005dca6000 CR4: 00000000003526f0
Call Trace:
<TASK>
oops_end+0x36/0x110 arch/x86/kernel/dumpstack.c:380
__exc_general_protection arch/x86/kernel/traps.c:968 [inline]
exc_general_protection+0x156/0x1f0 arch/x86/kernel/traps.c:914
asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:589
RIP: 0010:azx_freeze_noirq+0x49/0x1b0 sound/hda/controllers/intel.c:1093
Code: 8d 73 78 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 b8 83 19 f9 4d 8b 36 49 8d be 90 01 00 00 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 9b 83 19 f9 4d 85 f6 0f 84 ca 00 00 00 4d
RSP: 0018:ffffc900066ffa00 EFLAGS: 00010202
RAX: 0000000000000032 RBX: ffff88801af9c0d0 RCX: ffff888031693e80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000190
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffffff891876a0 R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8c6fd3c0
pci_pm_freeze_noirq+0x10e/0x4d0 drivers/pci/pci-driver.c:1112
dpm_run_callback+0x84/0x2a0 drivers/base/power/main.c:510
device_suspend_noirq+0x574/0xba0 drivers/base/power/main.c:1534
async_suspend_noirq+0x20/0x30 drivers/base/power/main.c:1572
async_run_entry_fn+0x9d/0x430 kernel/async.c:129
process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
process_scheduled_works kernel/workqueue.c:3462 [inline]
worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
----------------
Code disassembly (best guess):
0: 8d 73 78 lea 0x78(%rbx),%esi
3: 4c 89 f0 mov %r14,%rax
6: 48 c1 e8 03 shr $0x3,%rax
a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1)
f: 74 08 je 0x19
11: 4c 89 f7 mov %r14,%rdi
14: e8 b8 83 19 f9 call 0xf91983d1
19: 4d 8b 36 mov (%r14),%r14
1c: 49 8d be 90 01 00 00 lea 0x190(%r14),%rdi
23: 48 89 f8 mov %rdi,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction
2f: 74 05 je 0x36
31: e8 9b 83 19 f9 call 0xf91983d1
36: 4d 85 f6 test %r14,%r14
39: 0f 84 ca 00 00 00 je 0x109
3f: 4d rex.WRB
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: cc2b5f627e8c Add linux-next specific files for 20260714
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=170f9bb9580000
kernel config: https://syzkaller.appspot.com/x/.config?x=2290ccbf984c524f
dashboard link: https://syzkaller.appspot.com/bug?extid=1b196987ee391142d653
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
CC: [linux-...@vger.kernel.org linux...@vger.kernel.org pe...@perex.cz ti...@suse.com]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/6836f8efb1da/disk-cc2b5f62.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0109d3477cc7/vmlinux-cc2b5f62.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c2e49e350bbf/bzImage-cc2b5f62.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1b1969...@syzkaller.appspotmail.com
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000032: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000190-0x0000000000000197]
CPU: 1 UID: 0 PID: 5874 Comm: kworker/u8:63 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: async async_run_entry_fn
RIP: 0010:azx_freeze_noirq+0x49/0x1b0 sound/hda/controllers/intel.c:1093
Code: 8d 73 78 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 b8 83 19 f9 4d 8b 36 49 8d be 90 01 00 00 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 9b 83 19 f9 4d 85 f6 0f 84 ca 00 00 00 4d
RSP: 0018:ffffc900066ffa00 EFLAGS: 00010202
RAX: 0000000000000032 RBX: ffff88801af9c0d0 RCX: ffff888031693e80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000190
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffffff891876a0 R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8c6fd3c0
FS: 0000000000000000(0000) GS:ffff888125af2000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd848c82f8 CR3: 000000005dca6000 CR4: 00000000003526f0
Call Trace:
<TASK>
pci_pm_freeze_noirq+0x10e/0x4d0 drivers/pci/pci-driver.c:1112
dpm_run_callback+0x84/0x2a0 drivers/base/power/main.c:510
device_suspend_noirq+0x574/0xba0 drivers/base/power/main.c:1534
async_suspend_noirq+0x20/0x30 drivers/base/power/main.c:1572
async_run_entry_fn+0x9d/0x430 kernel/async.c:129
process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
process_scheduled_works kernel/workqueue.c:3462 [inline]
worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Modules linked in:
------------[ cut here ]------------
console_irqwork_blocked
WARNING: kernel/printk/printk.c:4634 at __wake_up_klogd+0xf4/0x120 kernel/printk/printk.c:4634, CPU#1: kworker/u8:63/5874
Modules linked in:
CPU: 1 UID: 0 PID: 5874 Comm: kworker/u8:63 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: async async_run_entry_fn
RIP: 0010:__wake_up_klogd+0xf4/0x120 kernel/printk/printk.c:4634
Code: 92 ef ff 65 8b 1d 6c 7b 1e 11 31 ff 89 de e8 93 43 21 00 85 db 74 18 e8 da 3e 21 00 5b 5d e9 c3 8b af 09 cc e8 cd 3e 21 00 90 <0f> 0b 90 eb ed e8 c2 3e 21 00 e8 7d c0 8e ff eb e1 e8 b6 3e 21 00
RSP: 0018:ffffc900066ff868 EFLAGS: 00010093
RAX: ffffffff81a464e3 RBX: 0000000000000001 RCX: ffff888031693e80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900066ff948 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1fa1890 R12: dffffc0000000032
R13: 0000000000000001 R14: 0000000000000293 R15: ffffc900066ff958
FS: 0000000000000000(0000) GS:ffff888125af2000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd848c82f8 CR3: 000000005dca6000 CR4: 00000000003526f0
Call Trace:
<TASK>
oops_end+0x36/0x110 arch/x86/kernel/dumpstack.c:380
__exc_general_protection arch/x86/kernel/traps.c:968 [inline]
exc_general_protection+0x156/0x1f0 arch/x86/kernel/traps.c:914
asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:589
RIP: 0010:azx_freeze_noirq+0x49/0x1b0 sound/hda/controllers/intel.c:1093
Code: 8d 73 78 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 b8 83 19 f9 4d 8b 36 49 8d be 90 01 00 00 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 9b 83 19 f9 4d 85 f6 0f 84 ca 00 00 00 4d
RSP: 0018:ffffc900066ffa00 EFLAGS: 00010202
RAX: 0000000000000032 RBX: ffff88801af9c0d0 RCX: ffff888031693e80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000190
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffffff891876a0 R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8c6fd3c0
pci_pm_freeze_noirq+0x10e/0x4d0 drivers/pci/pci-driver.c:1112
dpm_run_callback+0x84/0x2a0 drivers/base/power/main.c:510
device_suspend_noirq+0x574/0xba0 drivers/base/power/main.c:1534
async_suspend_noirq+0x20/0x30 drivers/base/power/main.c:1572
async_run_entry_fn+0x9d/0x430 kernel/async.c:129
process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
process_scheduled_works kernel/workqueue.c:3462 [inline]
worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
----------------
Code disassembly (best guess):
0: 8d 73 78 lea 0x78(%rbx),%esi
3: 4c 89 f0 mov %r14,%rax
6: 48 c1 e8 03 shr $0x3,%rax
a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1)
f: 74 08 je 0x19
11: 4c 89 f7 mov %r14,%rdi
14: e8 b8 83 19 f9 call 0xf91983d1
19: 4d 8b 36 mov (%r14),%r14
1c: 49 8d be 90 01 00 00 lea 0x190(%r14),%rdi
23: 48 89 f8 mov %rdi,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction
2f: 74 05 je 0x36
31: e8 9b 83 19 f9 call 0xf91983d1
36: 4d 85 f6 test %r14,%r14
39: 0f 84 ca 00 00 00 je 0x109
3f: 4d rex.WRB
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
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