syzbot

 sign-in | mailing list | source | docs
🐞 Open [1501]
≡ Subsystems
🐞 Fixed [6528]
🐞 Invalid [16641]
⬇ Missing Backports [205]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
Total Repo Heatmap Subsystems Heatmap
💬 Send us feedback

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: 195d, last: 6h06m
Cause bisection: failed (error log, bisect log)
  
▶ ▼ Discussions (6)
Title Replies (including bot) Last reply
[syzbot] Monthly bluetooth report (Aug 2025) 0 (1) 2025/08/25 08:44
[syzbot] Monthly bluetooth report (Jul 2025) 0 (1) 2025/07/24 09:32
[syzbot] [bluetooth?] general protection fault in bcsp_recv 1 (5) 2025/06/30 08:39
[PATCH] Bluetooth: set bcsp to NULL after purging 1 (1) 2025/06/30 03:23
[syzbot] Monthly bluetooth report (Jun 2025) 0 (1) 2025/06/23 07:31
[syzbot] Monthly bluetooth report (May 2025) 0 (1) 2025/05/22 12:58
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 BUG: unable to handle kernel paging request in bcsp_recv origin:upstream 8 C 14 28d 120d 0/3 upstream: reported C repro on 2025/04/27 13:45
linux-6.6 general protection fault in bcsp_recv 2 2 6d03h 55d 0/2 upstream: reported on 2025/07/01 16:33
linux-5.15 general protection fault in bcsp_recv origin:upstream 8 C 9 26d 74d 0/3 upstream: reported C repro on 2025/06/13 12:03
▶ ▼ Last patch testing requests (3)
Created Duration User Patch Repo Result
2025/06/30 08:04 26m hdanton@sina.com patch upstream OK log
2025/06/30 03:03 1m ipravdin.official@gmail.com patch upstream error
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 PTI
KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f]
CPU: 0 UID: 0 PID: 6000 Comm: syz.0.19 Not tainted 6.16.0-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:bcsp_recv+0x13d/0x1740 drivers/bluetooth/hci_bcsp.c:590
Code: 89 4c 24 40 48 89 54 24 28 48 c1 ea 03 48 89 54 24 68 48 89 5c 24 20 48 c1 eb 03 48 89 5c 24 60 4c 89 7c 24 38 48 8b 44 24 58 <42> 80 3c 30 00 74 08 4c 89 ff e8 14 e7 c9 f9 49 8b 1f 31 ff 48 89
RSP: 0018:ffffc900032c7c00 EFLAGS: 00010206
RAX: 0000000000000021 RBX: 0000000000000030 RCX: 000000000000002f
RDX: 000000000000002f RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900032c7d60 R08: ffff888035712c1f R09: 1ffff11006ae2583
R10: dffffc0000000000 R11: ffffffff885624a0 R12: 0000000000000001
R13: ffffc900032c7e00 R14: dffffc0000000000 R15: 0000000000000108
FS:  00007facd2b6e6c0(0000) GS:ffff888125c57000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007facd2b6df98 CR3: 000000007d300000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 hci_uart_tty_receive+0x194/0x220 drivers/bluetooth/hci_ldisc.c:627
 tiocsti+0x23c/0x2c0 drivers/tty/tty_io.c:2290
 tty_ioctl+0x626/0xde0 drivers/tty/tty_io.c:2706
 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: 0033:0x7facd1d8e9a9
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:00007facd2b6e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007facd1fb6080 RCX: 00007facd1d8e9a9
RDX: 0000200000000140 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00007facd1e10d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007facd1fb6080 R15: 00007ffc089ebab8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:bcsp_recv+0x13d/0x1740 drivers/bluetooth/hci_bcsp.c:590
Code: 89 4c 24 40 48 89 54 24 28 48 c1 ea 03 48 89 54 24 68 48 89 5c 24 20 48 c1 eb 03 48 89 5c 24 60 4c 89 7c 24 38 48 8b 44 24 58 <42> 80 3c 30 00 74 08 4c 89 ff e8 14 e7 c9 f9 49 8b 1f 31 ff 48 89
RSP: 0018:ffffc900032c7c00 EFLAGS: 00010206
RAX: 0000000000000021 RBX: 0000000000000030 RCX: 000000000000002f
RDX: 000000000000002f RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900032c7d60 R08: ffff888035712c1f R09: 1ffff11006ae2583
R10: dffffc0000000000 R11: ffffffff885624a0 R12: 0000000000000001
R13: ffffc900032c7e00 R14: dffffc0000000000 R15: 0000000000000108
FS:  00007facd2b6e6c0(0000) GS:ffff888125c57000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007facd2b6df98 CR3: 000000007d300000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	89 4c 24 40          	mov    %ecx,0x40(%rsp)
   4:	48 89 54 24 28       	mov    %rdx,0x28(%rsp)
   9:	48 c1 ea 03          	shr    $0x3,%rdx
   d:	48 89 54 24 68       	mov    %rdx,0x68(%rsp)
  12:	48 89 5c 24 20       	mov    %rbx,0x20(%rsp)
  17:	48 c1 eb 03          	shr    $0x3,%rbx
  1b:	48 89 5c 24 60       	mov    %rbx,0x60(%rsp)
  20:	4c 89 7c 24 38       	mov    %r15,0x38(%rsp)
  25:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
* 2a:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 ff             	mov    %r15,%rdi
  34:	e8 14 e7 c9 f9       	call   0xf9c9e74d
  39:	49 8b 1f             	mov    (%r15),%rbx
  3c:	31 ff                	xor    %edi,%edi
  3e:	48                   	rex.W
  3f:	89                   	.byte 0x89

Crashes (756):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/31 05:18 upstream 038d61fd6422 f8f2b4da .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in bcsp_recv
2025/04/22 00:05 upstream 9d7a0577c9db 2a20f901 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in bcsp_recv
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
2025/07/31 10:31 linux-next 84b92a499e7e f8f2b4da .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce 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
2025/08/25 23:29 upstream 1b237f190eb3 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in bcsp_recv
2025/08/25 10:16 upstream c330cb607721 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in bcsp_recv
2025/08/25 00:58 upstream c330cb607721 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in bcsp_recv
2025/08/22 13:20 upstream 3957a5720157 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in bcsp_recv
2025/08/19 16:43 upstream be48bcf004f9 523f460e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in bcsp_recv
2025/08/14 01:12 upstream 038d61fd6422 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in bcsp_recv
2025/08/08 17:09 upstream 37816488247d 987b750d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in bcsp_recv
2025/05/17 04:15 upstream 3c21441eeffc f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in bcsp_recv
2025/08/26 06:49 upstream b6add54ba618 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/25 16:57 upstream 1b237f190eb3 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/25 14:42 upstream 1b237f190eb3 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/25 07:23 upstream 1b237f190eb3 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/25 04:08 upstream 69fd6b99b8f8 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/24 19:48 upstream 69fd6b99b8f8 bf27483f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in bcsp_recv
2025/08/24 16:22 upstream 69fd6b99b8f8 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/24 13:43 upstream 8d245acc1e88 bf27483f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in bcsp_recv
2025/08/24 11:12 upstream 8d245acc1e88 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/24 10:07 upstream 8d245acc1e88 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/24 08:32 upstream 8d245acc1e88 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/24 07:28 upstream 8d245acc1e88 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/24 01:01 upstream 8d245acc1e88 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/23 22:14 upstream 8d245acc1e88 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/23 16:46 upstream 6debb6904172 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/23 12:41 upstream 6debb6904172 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/23 11:26 upstream 6debb6904172 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/22 21:57 upstream cf6fc5eefc5b bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/22 19:22 upstream cf6fc5eefc5b bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/22 10:23 upstream 3957a5720157 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/22 04:31 upstream 3957a5720157 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/22 03:13 upstream 3957a5720157 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/22 00:50 upstream 32b7144f806e 3e79b825 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/21 21:36 upstream 32b7144f806e 3e79b825 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/21 14:25 upstream 32b7144f806e 3e79b825 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/21 07:01 upstream 41cd3fd15263 0b9605c8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/21 05:49 upstream 41cd3fd15263 0b9605c8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/21 01:12 upstream 41cd3fd15263 0b9605c8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/20 20:34 upstream b19a97d57c15 bd178e57 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/20 17:53 upstream b19a97d57c15 bd178e57 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/20 13:35 upstream b19a97d57c15 bd178e57 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/20 12:11 upstream b19a97d57c15 bd178e57 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/20 04:30 upstream b19a97d57c15 79512909 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/19 23:27 upstream b19a97d57c15 79512909 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/19 13:27 upstream be48bcf004f9 523f460e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/19 11:48 upstream be48bcf004f9 523f460e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/19 08:24 upstream be48bcf004f9 52052143 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in bcsp_recv
2025/08/19 07:11 upstream be48bcf004f9 6e8d317a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/18 19:40 upstream c17b750b3ad9 1804e95e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/08/18 00:35 upstream 8d561baae505 1804e95e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in bcsp_recv
2025/08/24 21:57 linux-next 7fa4d8dc380f bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in bcsp_recv
2025/08/21 11:45 linux-next 7fa4d8dc380f 0b9605c8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in bcsp_recv
2025/08/20 19:02 linux-next 5303936d609e bd178e57 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in bcsp_recv
2025/08/23 15:06 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in bcsp_recv
2025/08/23 06:30 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in bcsp_recv
2025/08/22 23:53 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in bcsp_recv
2025/08/21 10:32 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 0b9605c8 .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.