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general protection fault in tty_register_device_attr

Status: closed as dup on 2023/09/03 21:59
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+85792f3143e6271d2c97@syzkaller.appspotmail.com
First crash: 577d, last: 553d
Cause bisection: introduced by (bisect log) :
commit d21fdd07cea418c0d98c8a15fc95b8b8970801e7
Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Thu Aug 17 09:12:21 2023 +0000

  driver core: Return proper error code when dev_set_name() fails

Crash: BUG: unable to handle kernel NULL pointer dereference in tty_register_device_attr (log)
Repro: C syz .config
  
▶ ▼ Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
general protection fault in netdev_register_kobject kernel C done 512 540d 574d
▶ ▼ Discussions (2)
Title Replies (including bot) Last reply
Re: [PATCH] kobject: fix kobj and fmt are both null 2 (2) 2023/09/04 09:44
[syzbot] [kernel?] general protection fault in tty_register_device_attr 1 (2) 2023/09/03 21:59
▶ ▼ Last patch testing requests (2)
Created Duration User Patch Repo Result
2023/09/03 06:21 29m eadavis@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git 2ee82481c392 OK log
2023/09/02 05:13 28m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git 2ee82481c392 OK log

Sample crash report:
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff38fc4838 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fac9a3aed89
RDX: 0000000020000040 RSI: 00000000404c4701 RDI: 0000000000000004
RBP: 0000000000000001 R08: 00007fff38fc45d7 R09: 0000000000000003
R10: 0000000000000001 R11: 0000000000000246 R12: 00007fff38fc4928
R13: 00007fac9a3f5032 R14: 00007fff38fc4980 R15: 0000000000000003
 </TASK>
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 5046 Comm: syz-executor362 Not tainted 6.5.0-next-20230828-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:strchr+0x1b/0xb0 lib/string.c:329
Code: a3 ac f7 48 8b 74 24 08 48 8b 14 24 eb 89 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 c1 ea 03 53 48 83 ec 10 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 51 0f b6 07 89
RSP: 0018:ffffc90003a1f800 EFLAGS: 00010286
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000025 RDI: 0000000000000000
RBP: ffffc90003a1f890 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90003a1f890
R13: 0000000000000cc0 R14: ffff888014a96000 R15: 0000000000000001
FS:  0000555556b43480(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005584fe812978 CR3: 00000000729c5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kvasprintf_const+0x25/0x190 lib/kasprintf.c:45
 kobject_set_name_vargs+0x5a/0x130 lib/kobject.c:272
 kobject_add_varg lib/kobject.c:366 [inline]
 kobject_add+0x12a/0x240 lib/kobject.c:424
 device_add+0x290/0x1ac0 drivers/base/core.c:3560
 tty_register_device_attr+0x38f/0x7b0 drivers/tty/tty_io.c:3248
 gsm_register_devices drivers/tty/n_gsm.c:654 [inline]
 gsm_activate_mux+0x157/0x2d0 drivers/tty/n_gsm.c:3138
 gsm_config drivers/tty/n_gsm.c:3383 [inline]
 gsmld_ioctl+0x8cc/0x1550 drivers/tty/n_gsm.c:3786
 tty_ioctl+0x706/0x1580 drivers/tty/tty_io.c:2785
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl fs/ioctl.c:857 [inline]
 __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fac9a3aed89
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff38fc4838 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fac9a3aed89
RDX: 0000000020000040 RSI: 00000000404c4701 RDI: 0000000000000004
RBP: 0000000000000001 R08: 00007fff38fc45d7 R09: 0000000000000003
R10: 0000000000000001 R11: 0000000000000246 R12: 00007fff38fc4928
R13: 00007fac9a3f5032 R14: 00007fff38fc4980 R15: 0000000000000003
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:strchr+0x1b/0xb0 lib/string.c:329
Code: a3 ac f7 48 8b 74 24 08 48 8b 14 24 eb 89 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 c1 ea 03 53 48 83 ec 10 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 51 0f b6 07 89
RSP: 0018:ffffc90003a1f800 EFLAGS: 00010286
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000025 RDI: 0000000000000000
RBP: ffffc90003a1f890 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90003a1f890
R13: 0000000000000cc0 R14: ffff888014a96000 R15: 0000000000000001
FS:  0000555556b43480(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005584fe812978 CR3: 00000000729c5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	ff c3                	inc    %ebx
   2:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   9:	00 00 00
   c:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  11:	48 89 f8             	mov    %rdi,%rax
  14:	48 89 f7             	mov    %rsi,%rdi
  17:	48 89 d6             	mov    %rdx,%rsi
  1a:	48 89 ca             	mov    %rcx,%rdx
  1d:	4d 89 c2             	mov    %r8,%r10
  20:	4d 89 c8             	mov    %r9,%r8
  23:	4c 8b 4c 24 08       	mov    0x8(%rsp),%r9
  28:	0f 05                	syscall
* 2a:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax <-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 c7 c1 b8 ff ff ff 	mov    $0xffffffffffffffb8,%rcx
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Crashes (74):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/08/29 03:26 linux-next 2ee82481c392 7ba13a15 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in tty_register_device_attr
2023/09/13 07:19 upstream a747acc0b752 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in tty_register_device_attr
2023/09/12 07:33 upstream 0bb80ecc33a8 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in tty_register_device_attr
2023/09/12 02:16 upstream 0bb80ecc33a8 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in tty_register_device_attr
2023/09/12 02:15 upstream 0bb80ecc33a8 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in tty_register_device_attr
2023/09/09 20:55 upstream 6099776f9f26 6654cf89 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in tty_register_device_attr
2023/09/09 17:55 upstream 6099776f9f26 6654cf89 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in tty_register_device_attr
2023/09/09 06:27 upstream ca9c7abf9502 6654cf89 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in tty_register_device_attr
2023/09/08 01:44 upstream 4a0fc73da97e 72324844 .config console log report info ci-upstream-kasan-gce-root general protection fault in tty_register_device_attr
2023/09/07 17:24 upstream 7ba2090ca64e 72324844 .config console log report info ci-upstream-kasan-badwrites-root general protection fault in tty_register_device_attr
2023/09/07 17:04 upstream 7ba2090ca64e 72324844 .config console log report info ci-upstream-kasan-gce-root general protection fault in tty_register_device_attr
2023/09/05 17:37 upstream 3f86ed6ec0b3 8bc9053e .config console log report info ci-upstream-kasan-gce-root general protection fault in tty_register_device_attr
2023/09/05 07:15 upstream 3f86ed6ec0b3 8bc9053e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in tty_register_device_attr
2023/09/04 03:00 upstream db906f0ca6bb 696ea0d2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in tty_register_device_attr
2023/09/02 10:55 upstream b84acc11b1c9 696ea0d2 .config console log report info ci-upstream-kasan-gce-selinux-root general protection fault in tty_register_device_attr
2023/09/11 18:02 upstream 0bb80ecc33a8 59da8366 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in tty_register_device_attr
2023/09/10 22:23 upstream e56b2b605799 6654cf89 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in tty_register_device_attr
2023/09/21 03:08 net 4a0f07d71b04 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in tty_register_device_attr
2023/09/19 07:43 net 6dab9dd64907 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in tty_register_device_attr
2023/09/18 13:36 net 802496c9b846 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in tty_register_device_attr
2023/09/18 12:01 net 802496c9b846 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in tty_register_device_attr
2023/09/18 05:37 net 802496c9b846 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in tty_register_device_attr
2023/09/18 03:42 net 0113d9c9d1cc 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in tty_register_device_attr
2023/09/16 23:25 net 1612cc4b1433 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in tty_register_device_attr
2023/09/15 13:01 net 9fdfb15a3dbf 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in tty_register_device_attr
2023/09/13 23:42 net 8cdd9f1aaedf 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in tty_register_device_attr
2023/09/13 22:20 net 8cdd9f1aaedf 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in tty_register_device_attr
2023/09/13 12:28 net 8cdd9f1aaedf 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in tty_register_device_attr
2023/09/13 09:05 net 8cdd9f1aaedf 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in tty_register_device_attr
2023/09/13 01:05 net 7a6102aa6df0 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in tty_register_device_attr
2023/09/12 15:31 net 5a124b1fd3e6 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in tty_register_device_attr
2023/09/11 11:57 net 0b9c3914ad92 6654cf89 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in tty_register_device_attr
2023/09/09 13:33 net ac28b1ec6135 6654cf89 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in tty_register_device_attr
2023/09/09 13:11 net ac28b1ec6135 6654cf89 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in tty_register_device_attr
2023/09/21 22:18 net-next 71b263e79370 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/21 19:14 net-next 71b263e79370 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/21 17:32 net-next 71b263e79370 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/21 01:25 net-next b3af9c0e89ca 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/20 22:38 net-next b3af9c0e89ca 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/19 20:14 net-next 0b8ef824eede 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/19 00:34 net-next a5ea26536e89 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/18 22:47 net-next a5ea26536e89 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/18 06:52 net-next d692873cbe86 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/18 00:15 net-next 1e73cfe85952 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/17 21:24 net-next 1e73cfe85952 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/17 09:48 net-next fff755e76e64 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/17 05:57 net-next fff755e76e64 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/17 03:59 net-next fff755e76e64 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/16 21:39 net-next c123e0d30bdb 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/16 12:16 net-next c123e0d30bdb 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/15 01:31 net-next 59bb1d698028 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/14 23:42 net-next 59bb1d698028 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/14 09:15 net-next ca5ab9638e92 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/13 20:01 net-next 7e6cadf51a55 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/13 10:06 net-next 8fc8911b6696 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/13 05:47 net-next 8fc8911b6696 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/12 09:08 net-next 73be7fb14e83 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/12 03:45 net-next 73be7fb14e83 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/12 01:59 net-next 73be7fb14e83 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/11 18:06 net-next 73be7fb14e83 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/11 17:43 net-next 73be7fb14e83 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/11 16:11 net-next 73be7fb14e83 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/09 06:00 net-next 73be7fb14e83 6654cf89 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/09 04:56 net-next 73be7fb14e83 6654cf89 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/09 01:45 net-next 73be7fb14e83 6654cf89 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/08 21:29 net-next 73be7fb14e83 6654cf89 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/08 09:39 net-next 73be7fb14e83 72324844 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in tty_register_device_attr
2023/09/13 09:21 linux-next 3c13c772fc23 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in tty_register_device_attr
2023/09/07 17:03 linux-next cd04b2fab5ee 72324844 .config console log report info ci-upstream-linux-next-kasan-gce-root general protection fault in tty_register_device_attr
2023/09/02 11:07 linux-next a47fc304d2b6 696ea0d2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in tty_register_device_attr
2023/08/29 02:55 linux-next 2ee82481c392 7ba13a15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in tty_register_device_attr
* Struck through repros no longer work on HEAD.