divide error in snd_pcm_lib


Created	Duration	User	Patch	Repo	Result
2021/10/17 11:26	16m	bisect fix		linux-4.19.y	error job log
2021/09/17 11:00	26m	bisect fix		linux-4.19.y	OK (0) job log log

divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8098 Comm: syz-executor317 Not tainted 4.19.204-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:snd_pcm_lib_ioctl_fifo_size sound/core/pcm_lib.c:1754 [inline] RIP: 0010:snd_pcm_lib_ioctl+0x450/0x9a0 sound/core/pcm_lib.c:1779 Code: a0 17 fb 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 00 05 00 00 49 8b 84 24 18 02 00 00 89 db 31 d2 <48> f7 f3 49 89 84 24 18 02 00 00 45 31 ed e9 de fb ff ff e8 88 a0 RSP: 0018:ffff888092bf7ba8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff864af1bf RDX: 0000000000000000 RSI: ffffffff864af1c9 RDI: 0000000000000007 RBP: 000000000000000f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000007 R11: 0000000000000000 R12: ffff8880b32b0000 R13: ffff8880b32b0218 R14: 0000000000000000 R15: 0000000000000000 FS: 00000000016c6300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001090 CR3: 00000000b507e000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fixup_unreferenced_params+0x5c5/0x8a0 sound/core/pcm_native.c:496 snd_pcm_hw_refine_old_user sound/core/pcm_native.c:3600 [inline] snd_pcm_common_ioctl+0x144d/0x29a0 sound/core/pcm_native.c:2948 snd_pcm_ioctl+0x7e/0xb0 sound/core/pcm_native.c:2985 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x443649 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffec06b0638 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004004a0 RCX: 0000000000443649 RDX: 00000000200010c0 RSI: 00000000c1004110 RDI: 0000000000000003 RBP: 00000000004031f0 R08: 0000000000000000 R09: 00000000004004a0 R10: 000000000000000f R11: 0000000000000246 R12: 0000000000403280 R13: 0000000000000000 R14: 00000000004b1018 R15: 00000000004004a0 Modules linked in: ---[ end trace 272791c8b61acd22 ]--- RIP: 0010:snd_pcm_lib_ioctl_fifo_size sound/core/pcm_lib.c:1754 [inline] RIP: 0010:snd_pcm_lib_ioctl+0x450/0x9a0 sound/core/pcm_lib.c:1779 Code: a0 17 fb 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 00 05 00 00 49 8b 84 24 18 02 00 00 89 db 31 d2 <48> f7 f3 49 89 84 24 18 02 00 00 45 31 ed e9 de fb ff ff e8 88 a0 RSP: 0018:ffff888092bf7ba8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff864af1bf RDX: 0000000000000000 RSI: ffffffff864af1c9 RDI: 0000000000000007 RBP: 000000000000000f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000007 R11: 0000000000000000 R12: ffff8880b32b0000 R13: ffff8880b32b0218 R14: 0000000000000000 R15: 0000000000000000 FS: 00000000016c6300(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9c6003a008 CR3: 00000000b507e000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: fb sti 1: 4c 89 ea mov %r13,%rdx 4: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax b: fc ff df e: 48 c1 ea 03 shr $0x3,%rdx 12: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 16: 0f 85 00 05 00 00 jne 0x51c 1c: 49 8b 84 24 18 02 00 mov 0x218(%r12),%rax 23: 00 24: 89 db mov %ebx,%ebx 26: 31 d2 xor %edx,%edx 28: 48 f7 f3 div %rbx <-- trapping instruction 2b: 49 89 84 24 18 02 00 mov %rax,0x218(%r12) 32: 00 33: 45 31 ed xor %r13d,%r13d 36: e9 de fb ff ff jmpq 0xfffffc19 3b: e8 .byte 0xe8 3c: 88 .byte 0x88 3d: a0 .byte 0xa0