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general protection fault in bcsp_recv

Status: upstream: reported C repro on 2025/02/15 17:18
Subsystems: bluetooth
[Documentation on labels]
Reported-by: syzbot+4ed6852d4da4606c93da@syzkaller.appspotmail.com
First crash: 62d, last: 6h12m
Cause bisection: failed (error log, bisect log)
  
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [bluetooth?] general protection fault in bcsp_recv 0 (2) 2025/04/02 23:56
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2025/03/02 10:08 9m retest repro linux-next error

Sample crash report:
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000021: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f]
CPU: 1 UID: 0 PID: 5945 Comm: syz-executor103 Not tainted 6.14.0-syzkaller-12456-gacc4d5ff0b61 #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:bcsp_recv+0x10a/0x17f0 drivers/bluetooth/hci_bcsp.c:590
Code: 18 48 c1 e8 03 48 01 e8 48 89 04 24 48 8d 83 78 01 00 00 48 89 44 24 28 48 c1 e8 03 48 89 44 24 08 e8 aa ca 5c f9 48 8b 04 24 <80> 38 00 0f 85 d1 12 00 00 4c 8b ab 08 01 00 00 31 ff 4c 89 ee e8
RSP: 0018:ffffc90003467bf0 EFLAGS: 00010293
RAX: dffffc0000000021 RBX: 0000000000000000 RCX: ffffffff885e756a
RDX: ffff888024910000 RSI: ffffffff885e75b6 RDI: 0000000000000005
RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffffc90003467d88
R13: ffffc90003467d88 R14: 0000000000000001 R15: ffff88810735a800
FS:  00007ffb5ce256c0(0000) GS:ffff8880d6abb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc59fa2f98 CR3: 0000000024ec0000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hci_uart_tty_receive+0x251/0x7e0 drivers/bluetooth/hci_ldisc.c:627
 tiocsti drivers/tty/tty_io.c:2299 [inline]
 tty_ioctl+0x57b/0x15f0 drivers/tty/tty_io.c:2716
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl fs/ioctl.c:892 [inline]
 __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ffb5ce97899
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 1f 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffb5ce25168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffb5cf1b418 RCX: 00007ffb5ce97899
RDX: 0000200000000140 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00007ffb5cf1b410 R08: 00007ffcd6d4fb07 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffb5cf1b41c
R13: 0000000000000010 R14: 00007ffcd6d4fa20 R15: 00007ffcd6d4fb08
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:bcsp_recv+0x10a/0x17f0 drivers/bluetooth/hci_bcsp.c:590
Code: 18 48 c1 e8 03 48 01 e8 48 89 04 24 48 8d 83 78 01 00 00 48 89 44 24 28 48 c1 e8 03 48 89 44 24 08 e8 aa ca 5c f9 48 8b 04 24 <80> 38 00 0f 85 d1 12 00 00 4c 8b ab 08 01 00 00 31 ff 4c 89 ee e8
RSP: 0018:ffffc90003467bf0 EFLAGS: 00010293
RAX: dffffc0000000021 RBX: 0000000000000000 RCX: ffffffff885e756a
RDX: ffff888024910000 RSI: ffffffff885e75b6 RDI: 0000000000000005
RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffffc90003467d88
R13: ffffc90003467d88 R14: 0000000000000001 R15: ffff88810735a800
FS:  00007ffb5ce256c0(0000) GS:ffff8880d6abb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc59fa2f98 CR3: 0000000024ec0000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	18 48 c1             	sbb    %cl,-0x3f(%rax)
   3:	e8 03 48 01 e8       	call   0xe801480b
   8:	48 89 04 24          	mov    %rax,(%rsp)
   c:	48 8d 83 78 01 00 00 	lea    0x178(%rbx),%rax
  13:	48 89 44 24 28       	mov    %rax,0x28(%rsp)
  18:	48 c1 e8 03          	shr    $0x3,%rax
  1c:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
  21:	e8 aa ca 5c f9       	call   0xf95ccad0
  26:	48 8b 04 24          	mov    (%rsp),%rax
* 2a:	80 38 00             	cmpb   $0x0,(%rax) <-- trapping instruction
  2d:	0f 85 d1 12 00 00    	jne    0x1304
  33:	4c 8b ab 08 01 00 00 	mov    0x108(%rbx),%r13
  3a:	31 ff                	xor    %edi,%edi
  3c:	4c 89 ee             	mov    %r13,%rsi
  3f:	e8                   	.byte 0xe8

Crashes (134):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/04/02 23:55 upstream acc4d5ff0b61 684b5338 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/02/12 00:00 linux-next df5d6180169a f2baddf5 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in bcsp_recv
2025/04/14 16:53 upstream 8ffd015db85f 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in bcsp_recv
2025/04/10 12:29 upstream 3b07108ada81 988b336c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in bcsp_recv
2025/04/09 10:06 upstream bec7dcbc242c b133e63a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in bcsp_recv
2025/04/08 20:17 upstream 0af2f6be1b42 a775275d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in bcsp_recv
2025/04/06 02:55 upstream f4d2ef48250a 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in bcsp_recv
2025/04/04 06:18 upstream a2cc6ff5ec8f d7ae3a11 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in bcsp_recv
2025/04/03 11:32 upstream 92b71befc349 996a9618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in bcsp_recv
2025/04/15 02:09 upstream 834a4a689699 0bd6db41 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/15 00:54 upstream 834a4a689699 0bd6db41 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/14 21:22 upstream 834a4a689699 0bd6db41 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/14 18:48 upstream 8ffd015db85f 0bd6db41 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/14 15:46 upstream 8ffd015db85f 0bd6db41 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/13 22:37 upstream 5aaaedb0cb54 0bd6db41 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/13 20:11 upstream 5aaaedb0cb54 0bd6db41 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/13 13:44 upstream 7cdabafc0012 0bd6db41 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/13 02:16 upstream 3bde70a2c827 0bd6db41 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/12 21:56 upstream 3bde70a2c827 0bd6db41 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/12 20:09 upstream 3bde70a2c827 0bd6db41 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/12 17:58 upstream 3bde70a2c827 0bd6db41 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/12 15:08 upstream 3bde70a2c827 0bd6db41 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/12 09:28 upstream e618ee89561b 0bd6db41 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in bcsp_recv
2025/04/12 07:36 upstream e618ee89561b 0bd6db41 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/12 00:55 upstream e618ee89561b 0bd6db41 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/11 22:23 upstream 900241a5cc15 12ba9c21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/11 14:16 upstream 900241a5cc15 12ba9c21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/11 09:16 upstream 0c7cae12f67c 94486846 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in bcsp_recv
2025/04/10 20:52 upstream 2eb959eeecc6 1ef3ab4d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/10 09:11 upstream 3b07108ada81 988b336c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/10 07:53 upstream 3b07108ada81 988b336c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/10 06:17 upstream 3b07108ada81 988b336c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/09 20:39 upstream a24588245776 47d015b1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/09 19:35 upstream a24588245776 47d015b1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/09 17:32 upstream a24588245776 47d015b1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/09 16:01 upstream a24588245776 47d015b1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/09 05:39 upstream bec7dcbc242c b133e63a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/08 21:50 upstream bec7dcbc242c b133e63a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/08 18:03 upstream 0af2f6be1b42 a775275d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/08 16:04 upstream 0af2f6be1b42 a775275d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/08 12:55 upstream 0af2f6be1b42 a775275d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/08 09:47 upstream 0af2f6be1b42 a775275d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/08 05:47 upstream 0af2f6be1b42 a2ada0e7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in bcsp_recv
2025/04/08 02:55 upstream 0af2f6be1b42 a2ada0e7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/08 01:54 upstream 0af2f6be1b42 a2ada0e7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/07 18:31 upstream 0af2f6be1b42 2f0c9720 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/07 17:06 upstream 0af2f6be1b42 2f0c9720 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/07 13:26 upstream 0af2f6be1b42 2f0c9720 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/07 05:26 upstream dda888789496 1c65791e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/04/13 01:09 upstream 3bde70a2c827 0bd6db41 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in bcsp_recv
2025/04/08 12:51 upstream 0af2f6be1b42 a775275d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in bcsp_recv
2025/04/02 05:43 linux-next fefb886b1344 c799dfdd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in bcsp_recv
2025/04/14 09:39 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 2fe2b96c3818 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in bcsp_recv
* Struck through repros no longer work on HEAD.