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general protection fault in h5_recv

Status: upstream: reported C repro on 2025/02/09 15:45
Subsystems: bluetooth
[Documentation on labels]
Reported-by: syzbot+b5691bb559396b262064@syzkaller.appspotmail.com
First crash: 173d, last: now
Cause bisection: introduced by (bisect log) :
commit c411c62cc13319533b1861e00cedc4883c3bc1bb
Author: Arseniy Krasnov <avkrasnov@salutedevices.com>
Date: Thu Jan 30 18:43:26 2025 +0000

  Bluetooth: hci_uart: fix race during initialization

Crash: BUG: unable to handle kernel NULL pointer dereference in h5_recv (log)
Repro: C syz .config
  
▶ ▼ Discussions (5)
Title Replies (including bot) Last reply
[syzbot] Monthly bluetooth report (Jul 2025) 0 (1) 2025/07/24 09:32
[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
[syzbot] Monthly bluetooth report (Apr 2025) 0 (1) 2025/04/22 10:11
[syzbot] [bluetooth?] general protection fault in h5_recv 1 (5) 2025/02/12 00:12
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 general protection fault in h5_recv origin:upstream 8 C 6 2h31m 54d 0/3 upstream: reported C repro on 2025/06/04 06:57
linux-6.6 general protection fault in h5_recv 2 2 6d11h 26d 0/2 upstream: reported on 2025/07/02 07:26
linux-6.1 general protection fault in h5_recv origin:upstream 8 C 11 2h09m 86d 0/3 upstream: reported C repro on 2025/05/03 02:45
▶ ▼ Last patch testing requests (3)
Created Duration User Patch Repo Result
2025/03/12 02:45 17m retest repro linux-next error
2025/03/12 02:45 9m retest repro linux-next error
2025/02/10 11:03 29m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master OK log

Sample crash report:
Oops: general protection fault, probably for non-canonical address 0xdffffc000000005f: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x00000000000002f8-0x00000000000002ff]
CPU: 2 UID: 0 PID: 6107 Comm: syz.0.16 Not tainted 6.16.0-rc7-syzkaller-00140-gec2df4364666 #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:h5_recv+0x104/0x910 drivers/bluetooth/hci_h5.c:572
Code: c1 e8 03 4c 01 f0 48 89 44 24 08 48 8d 83 08 03 00 00 48 89 44 24 30 48 c1 e8 03 48 89 44 24 10 e8 f1 b6 4e f9 48 8b 44 24 08 <80> 38 00 0f 85 ae 01 00 00 48 89 ea 48 89 e9 4c 8b bb f8 02 00 00
RSP: 0018:ffffc90003d07c00 EFLAGS: 00010293
RAX: dffffc000000005f RBX: 0000000000000000 RCX: ffffffff886d315a
RDX: ffff88802d382440 RSI: ffffffff886d319f RDI: 0000000000000005
RBP: ffffc90003d07d88 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000001 R14: dffffc0000000000 R15: ffffffff8cb35320
FS:  00007f88477fe6c0(0000) GS:ffff8880d6920000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f88477fdf98 CR3: 0000000052142000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 hci_uart_tty_receive+0x251/0x7e0 drivers/bluetooth/hci_ldisc.c:627
 tiocsti drivers/tty/tty_io.c:2290 [inline]
 tty_ioctl+0x580/0x1640 drivers/tty/tty_io.c:2706
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl fs/ioctl.c:893 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f884858e9a9
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:00007f88477fe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f88487b6080 RCX: 00007f884858e9a9
RDX: 0000200000000140 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00007f8848610d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f88487b6080 R15: 00007ffc83560bf8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:h5_recv+0x104/0x910 drivers/bluetooth/hci_h5.c:572
Code: c1 e8 03 4c 01 f0 48 89 44 24 08 48 8d 83 08 03 00 00 48 89 44 24 30 48 c1 e8 03 48 89 44 24 10 e8 f1 b6 4e f9 48 8b 44 24 08 <80> 38 00 0f 85 ae 01 00 00 48 89 ea 48 89 e9 4c 8b bb f8 02 00 00
RSP: 0018:ffffc90003d07c00 EFLAGS: 00010293
RAX: dffffc000000005f RBX: 0000000000000000 RCX: ffffffff886d315a
RDX: ffff88802d382440 RSI: ffffffff886d319f RDI: 0000000000000005
RBP: ffffc90003d07d88 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000001 R14: dffffc0000000000 R15: ffffffff8cb35320
FS:  00007f88477fe6c0(0000) GS:ffff8880d6a20000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc83561010 CR3: 0000000052142000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	c1 e8 03             	shr    $0x3,%eax
   3:	4c 01 f0             	add    %r14,%rax
   6:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
   b:	48 8d 83 08 03 00 00 	lea    0x308(%rbx),%rax
  12:	48 89 44 24 30       	mov    %rax,0x30(%rsp)
  17:	48 c1 e8 03          	shr    $0x3,%rax
  1b:	48 89 44 24 10       	mov    %rax,0x10(%rsp)
  20:	e8 f1 b6 4e f9       	call   0xf94eb716
  25:	48 8b 44 24 08       	mov    0x8(%rsp),%rax
* 2a:	80 38 00             	cmpb   $0x0,(%rax) <-- trapping instruction
  2d:	0f 85 ae 01 00 00    	jne    0x1e1
  33:	48 89 ea             	mov    %rbp,%rdx
  36:	48 89 e9             	mov    %rbp,%rcx
  39:	4c 8b bb f8 02 00 00 	mov    0x2f8(%rbx),%r15

Crashes (1127):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/27 20:21 upstream ec2df4364666 fb8f743d .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/22 09:14 upstream d608703fcdd9 0919b50b .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/26 11:25 linux-next d086c886ceb9 fb8f743d .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in h5_recv
2025/06/26 07:12 linux-next 1b152eeca84a 26d77996 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in h5_recv
2025/06/26 03:37 linux-next 1b152eeca84a 26d77996 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in h5_recv
2025/06/26 00:02 linux-next 1b152eeca84a 26d77996 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in h5_recv
2025/06/25 20:27 linux-next 1b152eeca84a 26d77996 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in h5_recv
2025/06/25 16:58 linux-next 1b152eeca84a 26d77996 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in h5_recv
2025/02/11 07:05 linux-next df5d6180169a 43f51a00 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in h5_recv
2025/02/09 15:44 linux-next ed58d103e6da ef44b750 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in h5_recv
2025/07/27 11:30 upstream ec2df4364666 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in h5_recv
2025/07/27 03:31 upstream ec2df4364666 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in h5_recv
2025/07/26 04:14 upstream 327579671a9b fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in h5_recv
2025/07/25 15:50 upstream 2942242dde89 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in h5_recv
2025/07/25 15:19 upstream 2942242dde89 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in h5_recv
2025/07/25 05:46 upstream 25fae0b93d1d fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in h5_recv
2025/07/24 22:29 upstream 25fae0b93d1d fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in h5_recv
2025/07/23 16:03 upstream 89be9a83ccf1 e1dd4f22 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in h5_recv
2025/07/23 02:56 upstream 89be9a83ccf1 85deaf45 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in h5_recv
2025/07/22 14:37 upstream 89be9a83ccf1 1555463b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in h5_recv
2025/07/22 13:20 upstream 89be9a83ccf1 1555463b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in h5_recv
2025/07/22 02:51 upstream 89be9a83ccf1 0b3788a0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in h5_recv
2025/07/21 08:32 upstream 89be9a83ccf1 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in h5_recv
2025/07/28 10:43 upstream b711733e89a3 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/28 06:08 upstream b711733e89a3 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/28 05:03 upstream b711733e89a3 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/28 03:39 upstream b711733e89a3 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/27 14:07 upstream ec2df4364666 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/27 09:50 upstream ec2df4364666 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/27 08:17 upstream 302f88ff3584 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/27 01:22 upstream 302f88ff3584 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/25 19:32 upstream 2942242dde89 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/25 11:34 upstream 94ce1ac2c9b4 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/25 08:07 upstream 94ce1ac2c9b4 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/23 23:06 upstream 01a412d06bc5 e0b9ac93 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/23 21:30 upstream 01a412d06bc5 e0b9ac93 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/23 13:10 upstream 89be9a83ccf1 e0b9ac93 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/23 09:56 upstream 89be9a83ccf1 e1dd4f22 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/23 06:27 upstream 89be9a83ccf1 e1dd4f22 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/23 04:14 upstream 89be9a83ccf1 e1dd4f22 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/23 02:48 upstream 89be9a83ccf1 e1dd4f22 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/22 23:46 upstream 89be9a83ccf1 af30dea9 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in h5_recv
2025/07/22 21:24 upstream 89be9a83ccf1 8e9d1dc1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/22 19:57 upstream 89be9a83ccf1 8e9d1dc1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/22 11:03 upstream 89be9a83ccf1 1555463b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/22 00:02 upstream 89be9a83ccf1 1555463b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/21 21:02 upstream 89be9a83ccf1 56d87229 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/21 17:27 upstream 89be9a83ccf1 56d87229 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/21 13:22 upstream 89be9a83ccf1 56d87229 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/21 11:42 upstream 89be9a83ccf1 56d87229 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/21 06:52 upstream 89be9a83ccf1 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/21 04:15 upstream 990b11a523a8 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/21 00:23 upstream 990b11a523a8 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/20 20:13 upstream 990b11a523a8 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/20 12:58 upstream f4a40a4282f4 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/07/28 08:54 upstream b711733e89a3 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in h5_recv
2025/07/26 14:01 upstream 5f33ebd2018c fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in h5_recv
2025/07/26 21:44 linux-next d086c886ceb9 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in h5_recv
2025/07/23 19:13 linux-next d086c886ceb9 e1dd4f22 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in h5_recv
2025/07/11 20:05 linux-next a62b7a37e6fc 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in h5_recv
2025/02/04 20:17 linux-next 40b8e93e17bf 4baca3d6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in h5_recv
2025/04/05 17:18 upstream a8662bcd2ff1 1c65791e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root BUG: unable to handle kernel NULL pointer dereference in h5_recv
2025/07/27 22:28 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 82af5ea7c611 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in h5_recv
2025/07/27 16:14 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 82af5ea7c611 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in h5_recv
2025/07/25 22:08 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 82af5ea7c611 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in h5_recv
2025/07/24 08:49 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ce5c617ec2d0 0c1d6ded .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in h5_recv
2025/07/23 11:44 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 29e0a1d9558f e1dd4f22 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in h5_recv
* Struck through repros no longer work on HEAD.