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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
Fix commit: Bluetooth: bcsp: receive data only if registered
Patched on: [ci-upstream-linux-next-kasan-gce-root ci-upstream-rust-kasan-gce], missing on: [ci-qemu-gce-upstream-auto ci-qemu-native-arm64-kvm ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-qemu2-riscv64 ci-snapshot-upstream-root ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb]
First crash: 216d, last: 11h53m
Cause bisection: failed (error log, bisect log)
  
▶ ▼ Discussions (7)
Title Replies (including bot) Last reply
[PATCH bluetooth-next] Bluetooth: bcsp: receive data only if registered 2 (2) 2025/09/09 21:00
[syzbot] [bluetooth?] general protection fault in bcsp_recv 2 (9) 2025/08/30 19:46
[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
[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 16 3d22h 141d 0/3 upstream: reported C repro on 2025/04/27 13:45
linux-6.6 general protection fault in bcsp_recv 2 2 26d 76d 0/2 upstream: reported on 2025/07/01 16:33
linux-5.15 general protection fault in bcsp_recv origin:upstream 8 C 10 1d00h 94d 0/3 upstream: reported C repro on 2025/06/13 12:03
▶ ▼ Last patch testing requests (6)
Created Duration User Patch Repo Result
2025/08/30 18:37 1h05m ipravdin.official@gmail.com patch git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git master OK log
2025/08/27 14:36 38m ipravdin.official@gmail.com patch git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git master report log
2025/08/27 14:29 17m ipravdin.official@gmail.com patch upstream report log
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 (881):
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
2025/09/15 09:09 upstream f83ec76bf285 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in bcsp_recv
2025/09/14 06:22 upstream 5cd64d4f9268 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in bcsp_recv
2025/09/13 13:49 upstream 22f20375f5b7 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in bcsp_recv
2025/09/10 17:32 upstream 9dd1835ecda5 fdeaa69b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in bcsp_recv
2025/09/10 15:18 upstream 9dd1835ecda5 fdeaa69b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in bcsp_recv
2025/09/09 13:21 upstream f777d1112ee5 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in bcsp_recv
2025/09/09 11:36 upstream f777d1112ee5 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in bcsp_recv
2025/09/09 10:23 upstream f777d1112ee5 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in bcsp_recv
2025/09/09 03:34 upstream f777d1112ee5 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in bcsp_recv
2025/09/09 01:35 upstream f777d1112ee5 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in bcsp_recv
2025/09/07 14:28 upstream b236920731dd d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in bcsp_recv
2025/09/06 03:01 upstream c8ed9b5c02a5 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in bcsp_recv
2025/08/29 04:12 upstream 07d9df80082b 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in bcsp_recv
2025/09/15 17:27 upstream f83ec76bf285 e2beed91 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in bcsp_recv
2025/09/15 11:54 upstream f83ec76bf285 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/14 21:30 upstream f83a4f2a4d8c e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/14 09:47 upstream f83a4f2a4d8c e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/14 01:35 upstream 5cd64d4f9268 e2beed91 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in bcsp_recv
2025/09/13 23:28 upstream 5cd64d4f9268 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/13 21:43 upstream 5cd64d4f9268 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/13 08:38 upstream 22f20375f5b7 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/13 06:50 upstream 22f20375f5b7 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/13 00:08 upstream 22f20375f5b7 e2beed91 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in bcsp_recv
2025/09/12 23:03 upstream 22f20375f5b7 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/12 18:15 upstream 320475fbd590 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/12 11:00 upstream 320475fbd590 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/12 02:53 upstream 02ffd6f89c50 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/11 18:34 upstream 02ffd6f89c50 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/10 18:37 upstream 9dd1835ecda5 fdeaa69b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in bcsp_recv
2025/09/10 03:05 upstream 9dd1835ecda5 fdeaa69b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/09 17:57 upstream f777d1112ee5 d291dd2d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in bcsp_recv
2025/09/09 08:35 upstream f777d1112ee5 d291dd2d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/09 06:05 upstream f777d1112ee5 d291dd2d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/08 21:22 upstream f777d1112ee5 d291dd2d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/08 14:22 upstream 76eeb9b8de98 d291dd2d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/06 13:39 upstream d1d10cea0895 d291dd2d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in bcsp_recv
2025/09/06 06:13 upstream c8ed9b5c02a5 d291dd2d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in bcsp_recv
2025/09/05 23:26 upstream c8ed9b5c02a5 d291dd2d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/05 18:38 upstream d69eb204c255 d291dd2d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in bcsp_recv
2025/09/05 18:35 upstream d69eb204c255 d291dd2d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in bcsp_recv
2025/09/13 07:03 upstream 22f20375f5b7 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in bcsp_recv
2025/09/12 03:53 upstream 02ffd6f89c50 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in bcsp_recv
2025/09/10 11:21 upstream 9dd1835ecda5 fdeaa69b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in bcsp_recv
2025/09/10 06:50 upstream 9dd1835ecda5 fdeaa69b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in bcsp_recv
2025/09/05 13:59 linux-next be5d4872e528 d291dd2d .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
2025/09/15 14:55 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8736259279a3 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in bcsp_recv
2025/09/14 02:58 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8736259279a3 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in bcsp_recv
2025/09/12 20:17 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8736259279a3 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in bcsp_recv
2025/09/12 09:28 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8736259279a3 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in bcsp_recv
2025/09/12 04:54 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8736259279a3 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in bcsp_recv
2025/09/08 06:52 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci b320789d6883 d291dd2d .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.