WARNING in copy_siginfo_to_user

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: e861d067 Linux 4.14.127
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=13920921a00000
kernel config: https://syzkaller.appspot.com/x/.config?x=811cd47e9cb8f2d1
dashboard link: https://syzkaller.appspot.com/bug?extid=0752f29e9fe1ca14a41d
compiler: gcc (GCC) 9.0.0 20181231 (experimental)

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0752f2...@syzkaller.appspotmail.com

__do_page_fault+0x4c1/0xb80 arch/x86/mm/fault.c:1423
hsr_addr_subst_dest: Unknown node
do_page_fault+0x71/0x511 arch/x86/mm/fault.c:1498
------------[ cut here ]------------
page_fault+0x25/0x50 arch/x86/entry/entry_64.S:1120
WARNING: CPU: 1 PID: 12179 at net/hsr/hsr_framereg.c:313
hsr_addr_subst_dest.cold+0x45/0x4f net/hsr/hsr_framereg.c:313
Kernel panic - not syncing: panic_on_warn set ...

RIP: 0010:copy_siginfo_to_user+0xd1/0x910 kernel/signal.c:2829
RSP: 0018:ffff888061377d50 EFLAGS: 00010246
RAX: 0000000000000011 RBX: ffff888061377df0 RCX: ffffc9000c267000
RDX: 1ffff1100c26efbe RSI: ffffffff813ada68 RDI: ffff88809753d758
RBP: ffff888061377d78 R08: ffff88809753c380 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000020f0aff0
R13: ffff88809753c380 R14: ffff888061377df8 R15: 0000000000000000
SYSC_rt_sigtimedwait+0x12a/0x190 kernel/signal.c:2982
SyS_rt_sigtimedwait+0x2e/0x40 kernel/signal.c:2958
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4592c9
RSP: 002b:00007f425ea04c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000080
RAX: ffffffffffffffda RBX: 00007f425ea04c90 RCX: 00000000004592c9
RDX: 0000000000000000 RSI: 0000000020f0aff0 RDI: 0000000020001ff8
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 00007f425ea056d4
R13: 00000000004c66dc R14: 00000000004db540 R15: 0000000000000003
CPU: 1 PID: 12179 Comm: syz-executor.5 Not tainted 4.14.127 #21
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x138/0x19c lib/dump_stack.c:53
panic+0x1f2/0x426 kernel/panic.c:182
__warn.cold+0x2f/0x36 kernel/panic.c:546
report_bug+0x216/0x254 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:177 [inline]
fixup_bug arch/x86/kernel/traps.c:172 [inline]
do_error_trap+0x1bb/0x310 arch/x86/kernel/traps.c:295
do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:960
RIP: 0010:hsr_addr_subst_dest.cold+0x45/0x4f net/hsr/hsr_framereg.c:313
RSP: 0018:ffff8880740c7658 EFLAGS: 00010282
RAX: 0000000000000021 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff814afdb5 RDI: ffffed100e818ec1
RBP: ffff8880740c7698 R08: 0000000000000021 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888067353720
R13: 00000000acac0c02 R14: ffff888067353720 R15: 000000000000bd68
hsr_xmit net/hsr/hsr_forward.c:230 [inline]
hsr_forward_do net/hsr/hsr_forward.c:295 [inline]
hsr_forward_skb+0x1025/0x1940 net/hsr/hsr_forward.c:373
hsr_dev_xmit+0x72/0xa0 net/hsr/hsr_device.c:242
__netdev_start_xmit include/linux/netdevice.h:4033 [inline]
netdev_start_xmit include/linux/netdevice.h:4042 [inline]
xmit_one net/core/dev.c:3009 [inline]
dev_hard_start_xmit+0x18c/0x8b0 net/core/dev.c:3025
__dev_queue_xmit+0x1d95/0x25e0 net/core/dev.c:3525
dev_queue_xmit+0x18/0x20 net/core/dev.c:3558
packet_snd net/packet/af_packet.c:2973 [inline]
packet_sendmsg+0x328f/0x5920 net/packet/af_packet.c:2998
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xce/0x110 net/socket.c:656
sock_write_iter+0x21d/0x390 net/socket.c:925
call_write_iter include/linux/fs.h:1777 [inline]
new_sync_write fs/read_write.c:469 [inline]
__vfs_write+0x4a7/0x6b0 fs/read_write.c:482
vfs_write+0x198/0x500 fs/read_write.c:544
SYSC_write fs/read_write.c:590 [inline]
SyS_write+0xfd/0x230 fs/read_write.c:582
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4592c9
RSP: 002b:00007f98c1d89c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004592c9
RDX: 0000000000000048 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f98c1d8a6d4
R13: 00000000004c9394 R14: 00000000004e03e8 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.

[syzbot]