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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: 97d, last: 3h55m
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 (2)
Title Replies (including bot) Last reply
[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 (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 general protection fault in h5_recv origin:upstream C 4 4d00h 9d20h 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] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000002f8-0x00000000000002ff]
CPU: 1 UID: 0 PID: 5834 Comm: syz-executor200 Not tainted 6.14.0-rc2-next-20250210-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:h5_recv+0x153/0x940 drivers/bluetooth/hci_h5.c:572
Code: 08 01 44 8b 64 24 04 48 8b 5c 24 08 4c 8b 74 24 18 49 ff c7 41 ff cc 45 85 e4 0f 8e 55 06 00 00 e8 a2 58 f5 f8 48 8b 44 24 30 <42> 80 3c 28 00 74 08 48 89 df e8 ce 53 5c f9 48 8b 1b 31 ff 48 89
RSP: 0018:ffffc90003e8fc60 EFLAGS: 00010202
RAX: 000000000000005f RBX: 00000000000002f8 RCX: 0000000000000061
RDX: ffff8880350dda00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003e8fd70 R08: ffffffff88ca308e R09: 1ffff110062cdb03
R10: dffffc0000000000 R11: ffffffff88ca2fd0 R12: 0000000000000001
R13: dffffc0000000000 R14: ffff88803166d800 R15: ffffc90003e8fe00
FS:  00007f38f1dd06c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f38f1d8ed58 CR3: 000000007b704000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hci_uart_tty_receive+0x141/0x1c0 drivers/bluetooth/hci_ldisc.c:622
 tiocsti+0x24d/0x300 drivers/tty/tty_io.c:2299
 tty_ioctl+0x518/0xdc0 drivers/tty/tty_io.c:2716
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f38f1e183d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 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:00007f38f1dd0218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f38f1e9f328 RCX: 00007f38f1e183d9
RDX: 0000400000000040 RSI: 0000000000005412 RDI: 0000000000000006
RBP: 00007f38f1e9f320 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f38f1e6c074
R13: 0000400000000300 R14: 00004000000000c0 R15: 0000400000000040
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:h5_recv+0x153/0x940 drivers/bluetooth/hci_h5.c:572
Code: 08 01 44 8b 64 24 04 48 8b 5c 24 08 4c 8b 74 24 18 49 ff c7 41 ff cc 45 85 e4 0f 8e 55 06 00 00 e8 a2 58 f5 f8 48 8b 44 24 30 <42> 80 3c 28 00 74 08 48 89 df e8 ce 53 5c f9 48 8b 1b 31 ff 48 89
RSP: 0018:ffffc90003e8fc60 EFLAGS: 00010202
RAX: 000000000000005f RBX: 00000000000002f8 RCX: 0000000000000061
RDX: ffff8880350dda00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003e8fd70 R08: ffffffff88ca308e R09: 1ffff110062cdb03
R10: dffffc0000000000 R11: ffffffff88ca2fd0 R12: 0000000000000001
R13: dffffc0000000000 R14: ffff88803166d800 R15: ffffc90003e8fe00
FS:  00007f38f1dd06c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000040000000f000 CR3: 000000007b704000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	08 01                	or     %al,(%rcx)
   2:	44 8b 64 24 04       	mov    0x4(%rsp),%r12d
   7:	48 8b 5c 24 08       	mov    0x8(%rsp),%rbx
   c:	4c 8b 74 24 18       	mov    0x18(%rsp),%r14
  11:	49 ff c7             	inc    %r15
  14:	41 ff cc             	dec    %r12d
  17:	45 85 e4             	test   %r12d,%r12d
  1a:	0f 8e 55 06 00 00    	jle    0x675
  20:	e8 a2 58 f5 f8       	call   0xf8f558c7
  25:	48 8b 44 24 30       	mov    0x30(%rsp),%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 ce 53 5c f9       	call   0xf95c5407
  39:	48 8b 1b             	mov    (%rbx),%rbx
  3c:	31 ff                	xor    %edi,%edi
  3e:	48                   	rex.W
  3f:	89                   	.byte 0x89

Crashes (342):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2025/05/11 02:49 upstream 345030986df8 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in h5_recv
2025/05/10 07:07 upstream 3013c33dcbd9 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in h5_recv
2025/05/09 19:09 upstream 9c69f8884904 bb813bcc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in h5_recv
2025/05/09 00:27 upstream 2c89c1b655c0 dbf35fa1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in h5_recv
2025/05/08 22:38 upstream 2c89c1b655c0 dbf35fa1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in h5_recv
2025/05/08 02:44 upstream 707df3375124 dbf35fa1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in h5_recv
2025/05/06 20:58 upstream 0d8d44db295c ae98e6b9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in h5_recv
2025/05/06 12:08 upstream 01f95500a162 ae98e6b9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in h5_recv
2025/05/06 03:04 upstream 01f95500a162 ae98e6b9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in h5_recv
2025/05/05 19:53 upstream 92a09c47464d 6ca47dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in h5_recv
2025/05/05 07:52 upstream 92a09c47464d b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in h5_recv
2025/05/04 22:54 upstream e8ab83e34bdc b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in h5_recv
2025/05/03 03:44 upstream 2bfcee565c3a b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in h5_recv
2025/05/12 19:28 upstream 627277ba7c23 f6671af7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/12 19:28 upstream 627277ba7c23 f6671af7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/12 14:09 upstream 82f2b0b97b36 77908e5f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/12 06:57 upstream cd802e7e5f1e 77908e5f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/12 03:38 upstream cd802e7e5f1e 77908e5f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/12 02:37 upstream cd802e7e5f1e 77908e5f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/12 01:28 upstream cd802e7e5f1e 77908e5f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/12 00:19 upstream cd802e7e5f1e 77908e5f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/11 22:06 upstream cd802e7e5f1e 77908e5f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/11 17:43 upstream 3ce9925823c7 77908e5f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/11 05:34 upstream 3ce9925823c7 77908e5f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/10 13:50 upstream 1a33418a69cc 77908e5f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/10 09:01 upstream 0e1329d4045c 77908e5f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/09 20:50 upstream 9c69f8884904 43803998 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/09 14:19 upstream 9c69f8884904 43803998 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/08 12:04 upstream d76bb1ebb558 dbf35fa1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/08 10:38 upstream d76bb1ebb558 dbf35fa1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/07 23:27 upstream 707df3375124 dbf35fa1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/07 10:44 upstream 0d8d44db295c 350f4ffc .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in h5_recv
2025/05/07 04:38 upstream 0d8d44db295c 350f4ffc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/07 03:26 upstream 0d8d44db295c 350f4ffc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/06 10:56 upstream 01f95500a162 ae98e6b9 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/06 09:41 upstream 01f95500a162 ae98e6b9 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in h5_recv
2025/05/05 17:58 upstream 92a09c47464d 6ca47dd8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/04 19:53 upstream 081bc61f9312 b0714e37 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/04 17:16 upstream 081bc61f9312 b0714e37 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/04 08:30 upstream e8ab83e34bdc b0714e37 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/04 05:20 upstream e8ab83e34bdc b0714e37 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/04 02:57 upstream e8ab83e34bdc b0714e37 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/03 23:09 upstream 95d3481af6dc b0714e37 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/03 18:01 upstream 95d3481af6dc b0714e37 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/02 18:08 upstream ebd297a2affa d7f099d1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/02 11:04 upstream ebd297a2affa d7f099d1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in h5_recv
2025/05/01 16:16 upstream 4f79eaa2ceac 51b137cd .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in h5_recv
2025/04/12 16:46 linux-next 01c6df60d5d4 0bd6db41 .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
2025/05/12 05:44 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c32f8dc5aaf9 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in h5_recv
2025/05/07 18:08 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e0f4c8dd9d2d 350f4ffc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in h5_recv
2025/05/07 08:31 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e0f4c8dd9d2d 350f4ffc .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.