syzbot
WARNING in __rds_conn_create (2)
Status:
upstream: reported syz repro on 2026/10/16 02:45
Subsystems:
rds
Labels:
prio:low
[Documentation on labels]
Reported-by: syzbot+c3741bb338b5c6d6a4aa@syzkaller.appspotmail.com
First crash: 1d03h, last: 19h15m
Sample crash report:
XFS (loop0): Quotacheck: Done.
------------[ cut here ]------------
raw_local_irq_restore() called with IRQs enabled
WARNING: kernel/locking/irqflag-debug.c:10 at warn_bogus_irq_restore+0xc/0x20 kernel/locking/irqflag-debug.c:10, CPU#0: syz.0.18/5745
Modules linked in:
CPU: 0 UID: 0 PID: 5745 Comm: syz.0.18 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:warn_bogus_irq_restore+0xc/0x20 kernel/locking/irqflag-debug.c:10
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 90 48 8d 3d c4 18 93 05 <67> 48 0f b9 3a 90 e9 99 04 03 00 cc cc cc cc cc cc cc cc cc 90 90
RSP: 0018:ffffc9000797f8c0 EFLAGS: 00010206
RAX: 0000000000000202 RBX: 0000000000000287 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff917dce80
RBP: ffffc9000797fa40 R08: ffffffff914a10e3 R09: 1ffffffff229421c
R10: dffffc0000000000 R11: fffffbfff229421d R12: ffffffff8b2acb15
R13: ffff888051146318 R14: ffffffff914a10e0 R15: 0000000000000287
FS: 00007f7afe2f56c0(0000) GS:ffff88808b0b4000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7afd3ebc40 CR3: 000000004db87000 CR4: 0000000000352ef0
Call Trace:
<TASK>
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:210 [inline]
_raw_spin_unlock_irqrestore+0x67/0x80 kernel/locking/spinlock.c:221
spin_unlock_irqrestore include/linux/spinlock.h:425 [inline]
__rds_conn_create+0x1de5/0x2290 net/rds/connection.c:364
rds_conn_create_outgoing+0x43/0x60 net/rds/connection.c:394
rds_sendmsg+0xfca/0x20e0 net/rds/send.c:1348
sock_sendmsg_nosec+0x13a/0x180 net/socket.c:800
__sock_sendmsg net/socket.c:815 [inline]
__sys_sendto+0x408/0x5a0 net/socket.c:2281
__do_sys_sendto net/socket.c:2288 [inline]
__se_sys_sendto net/socket.c:2284 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2284
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7afd39e559
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:00007f7afe2f5028 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f7afd625fa0 RCX: 00007f7afd39e559
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f7afd4358b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7afd626038 R14: 00007f7afd625fa0 R15: 00007ffd156f7018
</TASK>
----------------
Code disassembly (best guess):
0: cc int3
1: cc int3
2: cc int3
3: cc int3
4: cc int3
5: cc int3
6: cc int3
7: cc int3
8: cc int3
9: cc int3
a: cc int3
b: cc int3
c: cc int3
d: cc int3
e: 90 nop
f: 90 nop
10: 90 nop
11: 90 nop
12: 90 nop
13: 90 nop
14: 90 nop
15: 90 nop
16: 90 nop
17: 90 nop
18: 90 nop
19: 90 nop
1a: 90 nop
1b: 90 nop
1c: 90 nop
1d: 90 nop
1e: f3 0f 1e fa endbr64
22: 90 nop
23: 48 8d 3d c4 18 93 05 lea 0x59318c4(%rip),%rdi # 0x59318ee
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: 90 nop
30: e9 99 04 03 00 jmp 0x304ce
35: cc int3
36: cc int3
37: cc int3
38: cc int3
39: cc int3
3a: cc int3
3b: cc int3
3c: cc int3
3d: cc int3
3e: 90 nop
3f: 90 nop
Struck through repros no longer work on HEAD.