Re: [syzbot] [sound?] BUG: unable to handle kernel paging request in snd_hdac_bus_parse_capabilities
syzbot <[email protected]>
| Newsgroups | org.kernel.vger.linux-sound,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <[email protected]> |
syzbot has found a reproducer for the following issue on: HEAD commit: f5bbbfec59b4 Merge tag 'probes-fixes-v7.2-rc7' of git://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=142eb479580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c44651ea7dd2f307 dashboard link: https://syzkaller.appspot.com/bug?extid=10cd2d1efe8eeb604bee compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=103a1149580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: [email protected] BUG: unable to handle page fault for address: 000000000001c0b4 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP KASAN NOPTI CPU: 1 UID: 0 PID: 1039 Comm: kworker/1:3 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: events azx_probe_work RIP: 0010:readw arch/x86/include/asm/io.h:58 [inline] RIP: 0010:snd_hdac_reg_readw include/sound/hdaudio.h:458 [inline] RIP: 0010:snd_hdac_bus_parse_capabilities+0x42/0x6d0 sound/hda/core/controller.c:412 Code: 97 f8 48 8d 45 20 48 89 c2 48 89 44 24 10 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 f8 05 00 00 48 8b 45 20 <66> 44 8b 68 14 4c 8b 7c 24 10 48 89 e8 45 0f b7 ed 45 31 f6 48 ba RSP: 0018:ffffc90005537ab0 EFLAGS: 00010246 RAX: 000000000001c0a0 RBX: ffff888027304058 RCX: ffffffff897e8c06 RDX: 1ffff11004e6080b RSI: ffffffff8972cfca RDI: ffff888027304038 RBP: ffff888027304038 R08: 0000000000000005 R09: 0000000000000003 R10: 0000000000000003 R11: 000000000000759b R12: 0000000000000003 R13: ffff8880294e4f44 R14: ffff888022d6c000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880d5eec000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000001c0b4 CR3: 000000005526e000 CR4: 0000000000352ef0 Call Trace: <TASK> azx_first_init sound/hda/controllers/intel.c:1936 [inline] azx_probe_continue sound/hda/controllers/intel.c:2365 [inline] azx_probe_work+0x1d8e/0x2640 sound/hda/controllers/intel.c:1737 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK> Modules linked in: CR2: 000000000001c0b4 ---[ end trace 0000000000000000 ]--- RIP: 0010:readw arch/x86/include/asm/io.h:58 [inline] RIP: 0010:snd_hdac_reg_readw include/sound/hdaudio.h:458 [inline] RIP: 0010:snd_hdac_bus_parse_capabilities+0x42/0x6d0 sound/hda/core/controller.c:412 Code: 97 f8 48 8d 45 20 48 89 c2 48 89 44 24 10 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 f8 05 00 00 48 8b 45 20 <66> 44 8b 68 14 4c 8b 7c 24 10 48 89 e8 45 0f b7 ed 45 31 f6 48 ba RSP: 0018:ffffc90005537ab0 EFLAGS: 00010246 RAX: 000000000001c0a0 RBX: ffff888027304058 RCX: ffffffff897e8c06 RDX: 1ffff11004e6080b RSI: ffffffff8972cfca RDI: ffff888027304038 RBP: ffff888027304038 R08: 0000000000000005 R09: 0000000000000003 R10: 0000000000000003 R11: 000000000000759b R12: 0000000000000003 R13: ffff8880294e4f44 R14: ffff888022d6c000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880d5eec000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000001c0b4 CR3: 000000005526e000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 97 xchg %eax,%edi 1: f8 clc 2: 48 8d 45 20 lea 0x20(%rbp),%rax 6: 48 89 c2 mov %rax,%rdx 9: 48 89 44 24 10 mov %rax,0x10(%rsp) e: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 15: fc ff df 18: 48 c1 ea 03 shr $0x3,%rdx 1c: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 20: 0f 85 f8 05 00 00 jne 0x61e 26: 48 8b 45 20 mov 0x20(%rbp),%rax * 2a: 66 44 8b 68 14 mov 0x14(%rax),%r13w <-- trapping instruction 2f: 4c 8b 7c 24 10 mov 0x10(%rsp),%r15 34: 48 89 e8 mov %rbp,%rax 37: 45 0f b7 ed movzwl %r13w,%r13d 3b: 45 31 f6 xor %r14d,%r14d 3e: 48 rex.W 3f: ba .byte 0xba --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.