general protection fault in sk_psock_verdict_data_ready

Status: upstream: reported on 2026/02/09 23:20
Reported-by: syzbot+ef15f3d0940979357342@syzkaller.appspotmail.com
First crash: 176d, last: 1d12h
▶ ▼ Similar bugs (14)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in sk_psock_verdict_data_ready net 2 2 1155d 1161d 0/29 auto-obsoleted due to no activity on 2023/09/14 09:29
android-5-15 general protection fault in sk_psock_verdict_data_ready origin:lts 19 syz, C 177 1d18h 199d 0/2 upstream: reported C repro on 2026/01/17 21:04
android-5-15 KASAN: use-after-free Read in sk_psock_verdict_data_ready 19 21 484d 701d 0/2 auto-obsoleted due to no activity on 2025/07/06 21:52
upstream KASAN: slab-use-after-free Read in sk_psock_verdict_data_ready (2) net bpf 19 2 604d 629d 0/29 auto-obsoleted due to no activity on 2025/04/03 12:37
upstream BUG: unable to handle kernel NULL pointer dereference in sk_psock_verdict_data_ready bpf net 10 syz, C unreliable 15 885d 1005d 25/29 fixed on 2024/04/02 10:57
upstream KASAN: slab-use-after-free Read in sk_psock_verdict_data_ready bpf net 19 1 793d 789d 0/29 auto-obsoleted due to no activity on 2024/08/31 11:03
linux-5.15 KASAN: use-after-free Read in sk_psock_verdict_data_ready 19 1 717d 717d 0/3 auto-obsoleted due to no activity on 2024/11/26 04:55
upstream KASAN: slab-use-after-free Read in sk_psock_verdict_data_ready (4) bpf net prio:normal 19 1 127d 126d 29/29 fixed on 2026/05/21 07:50
upstream KASAN: slab-use-after-free Read in sk_psock_verdict_data_ready (3) bpf net 19 5 352d 469d 0/29 auto-obsoleted due to no activity on 2025/11/25 19:43
android-6-1 KASAN: use-after-free Read in sk_psock_verdict_data_ready 19 2 633d 666d 0/2 auto-obsoleted due to no activity on 2025/02/08 01:10
android-6-1 KASAN: use-after-free Read in sk_psock_verdict_data_ready (2) 19 1 304d 304d 0/2 auto-obsoleted due to no activity on 2026/01/03 06:43
android-6-1 BUG: unable to handle kernel NULL pointer dereference in sk_psock_verdict_data_ready origin:upstream missing-backport 10 syz, C 204 766d 903d 0/2 auto-obsoleted due to no activity on 2024/09/07 14:49
linux-6.1 BUG: unable to handle kernel NULL pointer dereference in sk_psock_verdict_data_ready origin:upstream 10 syz, C done 1 902d 902d 3/3 fixed on 2024/03/18 12:46
android-6-1 KASAN: use-after-free Read in sk_psock_verdict_data_ready (3) 19 1 203d 203d 0/2 auto-obsoleted due to no activity on 2026/04/13 17:17

Sample crash report:
general protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf]
CPU: 0 PID: 9989 Comm: syz.4.1341 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:sk_psock_verdict_data_ready+0x143/0x1d0 net/core/skmsg.c:1253
Code: 24 50 48 c7 44 24 48 01 00 00 00 43 80 3c 2e 00 74 08 4c 89 ff e8 cd 84 be f9 41 bc c8 00 00 00 4d 03 27 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 ae 84 be f9 48 8b 7c 24 18 48 8d
RSP: 0018:ffffc90002e2f800 EFLAGS: 00010202
RAX: 0000000000000019 RBX: 1ffff920005c5f04 RCX: 0000000000080000
RDX: ffffc9000eb0a000 RSI: 000000000004ae9d RDI: 000000000004ae9e
RBP: ffffc90002e2f8d0 R08: ffffc90002e2f85f R09: ffffc90002e2f840
R10: dffffc0000000000 R11: fffff520005c5f0c R12: 00000000000000c8
R13: dffffc0000000000 R14: 1ffff1100e94b6c4 R15: ffff888074a5b620
FS:  00007f6ab55f76c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555576d76a38 CR3: 0000000064e16000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 unix_stream_sendmsg+0x7d1/0xc90 net/unix/af_unix.c:2110
 sock_sendmsg_nosec net/socket.c:706 [inline]
 __sock_sendmsg net/socket.c:718 [inline]
 ____sys_sendmsg+0x5be/0x8f0 net/socket.c:2446
 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2500
 __sys_sendmsg net/socket.c:2529 [inline]
 __do_sys_sendmsg net/socket.c:2538 [inline]
 __se_sys_sendmsg+0x1b7/0x2a0 net/socket.c:2536
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f6ab739f019
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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6ab55f7028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f6ab7626fa0 RCX: 00007f6ab739f019
RDX: 0000000000000000 RSI: 0000200000000500 RDI: 0000000000000006
RBP: 00007f6ab743600c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6ab7627038 R14: 00007f6ab7626fa0 R15: 00007ffdde5b5938
 </TASK>
Modules linked in:
---[ end trace b5ac33c075444ca7 ]---
RIP: 0010:sk_psock_verdict_data_ready+0x143/0x1d0 net/core/skmsg.c:1253
Code: 24 50 48 c7 44 24 48 01 00 00 00 43 80 3c 2e 00 74 08 4c 89 ff e8 cd 84 be f9 41 bc c8 00 00 00 4d 03 27 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 ae 84 be f9 48 8b 7c 24 18 48 8d
RSP: 0018:ffffc90002e2f800 EFLAGS: 00010202
RAX: 0000000000000019 RBX: 1ffff920005c5f04 RCX: 0000000000080000
RDX: ffffc9000eb0a000 RSI: 000000000004ae9d RDI: 000000000004ae9e
RBP: ffffc90002e2f8d0 R08: ffffc90002e2f85f R09: ffffc90002e2f840
R10: dffffc0000000000 R11: fffff520005c5f0c R12: 00000000000000c8
R13: dffffc0000000000 R14: 1ffff1100e94b6c4 R15: ffff888074a5b620
FS:  00007f6ab55f76c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2233dba368 CR3: 0000000064e16000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
   0:	24 50                	and    $0x50,%al
   2:	48 c7 44 24 48 01 00 	movq   $0x1,0x48(%rsp)
   9:	00 00
   b:	43 80 3c 2e 00       	cmpb   $0x0,(%r14,%r13,1)
  10:	74 08                	je     0x1a
  12:	4c 89 ff             	mov    %r15,%rdi
  15:	e8 cd 84 be f9       	call   0xf9be84e7
  1a:	41 bc c8 00 00 00    	mov    $0xc8,%r12d
  20:	4d 03 27             	add    (%r15),%r12
  23:	4c 89 e0             	mov    %r12,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 e7             	mov    %r12,%rdi
  34:	e8 ae 84 be f9       	call   0xf9be84e7
  39:	48 8b 7c 24 18       	mov    0x18(%rsp),%rdi
  3e:	48                   	rex.W
  3f:	8d                   	.byte 0x8d

Crashes (15):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/03 20:19 linux-5.15.y 6e2fd6534337 6b7c9f71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf general protection fault in sk_psock_verdict_data_ready
2026/06/13 17:07 linux-5.15.y dc027a595035 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf general protection fault in sk_psock_verdict_data_ready
2026/06/01 19:50 linux-5.15.y dc027a595035 8d8eeb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf general protection fault in sk_psock_verdict_data_ready
2026/05/27 17:47 linux-5.15.y 241d66fa280c 8777bdc3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf general protection fault in sk_psock_verdict_data_ready
2026/05/25 05:59 linux-5.15.y 241d66fa280c c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf general protection fault in sk_psock_verdict_data_ready
2026/05/18 12:07 linux-5.15.y 93741761e5e3 55156e84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf general protection fault in sk_psock_verdict_data_ready
2026/04/28 15:56 linux-5.15.y b9d57c40a767 ce741359 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf general protection fault in sk_psock_verdict_data_ready
2026/04/18 07:29 linux-5.15.y 91d48252ad4b 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf general protection fault in sk_psock_verdict_data_ready
2026/04/03 02:34 linux-5.15.y 91d48252ad4b 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in sk_psock_verdict_data_ready
2026/03/30 17:56 linux-5.15.y 91d48252ad4b dcaebc52 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf general protection fault in sk_psock_verdict_data_ready
2026/03/21 22:58 linux-5.15.y 91d48252ad4b 5b92003d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf general protection fault in sk_psock_verdict_data_ready
2026/03/21 16:05 linux-5.15.y 91d48252ad4b 5b92003d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf general protection fault in sk_psock_verdict_data_ready
2026/03/19 10:49 linux-5.15.y 91d48252ad4b 0199f9a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf general protection fault in sk_psock_verdict_data_ready
2026/03/04 14:36 linux-5.15.y 91d48252ad4b e6b6b96b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf general protection fault in sk_psock_verdict_data_ready
2026/02/09 23:20 linux-5.15.y 7b232985052f 4ab09a02 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf general protection fault in sk_psock_verdict_data_ready
* Struck through repros no longer work on HEAD.