------------[ cut here ]------------
WARNING: CPU: 0 PID: 4651 at net/kcm/kcmsock.c:633 kcm_write_msgs+0x800/0xfc0
Modules linked in:
CPU: 0 PID: 4651 Comm: syz-executor.0 Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : kcm_write_msgs+0x800/0xfc0
lr : kcm_write_msgs+0x7fc/0xfc0 net/kcm/kcmsock.c:633
sp : ffff80001d1b7620
x29: ffff80001d1b76a0 x28: 00000000ffffffea x27: dfff800000000000
x26: 0000000000198000 x25: ffff0000de736600 x24: ffff0000c1e2d8c0
x23: ffff0000d9537c80 x22: ffff0000d9537140 x21: 0000000000000011
x20: ffff0000c2e2e000 x19: 0000000000000000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000084c42fc x15: 0000000000000001
x14: 1ffff0000296c06c x13: dfff800000000000 x12: 0000000000000003
x11: 0000000000000000 x10: 0000000000000000 x9 : ffff0000d4fab680
x8 : ffff8000110dcd24 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80000804605c
x2 : 0000000000000006 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 kcm_write_msgs+0x800/0xfc0
 kcm_sendmsg+0x1824/0x1ddc net/kcm/kcmsock.c:1040
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 sock_write_iter+0x2b0/0x3f8 net/socket.c:1079
 call_write_iter include/linux/fs.h:2174 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x884/0xb44 fs/read_write.c:594
 ksys_write+0x15c/0x26c fs/read_write.c:647
 __do_sys_write fs/read_write.c:659 [inline]
 __se_sys_write fs/read_write.c:656 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:656
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 15984
hardirqs last  enabled at (15983): [<ffff8000081b59a4>] __local_bh_enable_ip+0x230/0x470 kernel/softirq.c:388
hardirqs last disabled at (15984): [<ffff800011b47794>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (15982): [<ffff80000fefc1cc>] spin_unlock_bh include/linux/spinlock.h:408 [inline]
softirqs last  enabled at (15982): [<ffff80000fefc1cc>] release_sock+0x1e4/0x270 net/core/sock.c:3276
softirqs last disabled at (15980): [<ffff80000fefc024>] spin_lock_bh include/linux/spinlock.h:368 [inline]
softirqs last disabled at (15980): [<ffff80000fefc024>] release_sock+0x3c/0x270 net/core/sock.c:3263
---[ end trace 28416f40761b5026 ]---
KCM: Hard failure on kcm_write_msgs