BUG: stack guard page was hit in arch_stack_walk

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 92ed3019 Linux 5.8-rc7
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12c98f28900000
kernel config: https://syzkaller.appspot.com/x/.config?x=84f076779e989e69
dashboard link: https://syzkaller.appspot.com/bug?extid=c05e6eff86f7a430fa73
compiler: gcc (GCC) 10.1.0-syz 20200507

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

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c05e6e...@syzkaller.appspotmail.com

BUG: stack guard page was hit at 000000009157a0b1 (stack is 000000007cb00dab..0000000055f9d23d)
kernel stack overflow (double-fault): 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 13871 Comm: syz-executor.4 Not tainted 5.8.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:arch_stack_walk+0x0/0xf0 arch/x86/kernel/stacktrace.c:17
Code: 8b eb c0 e6 82 89 fa ee ee 8d 57 01 ee ee eb cd e6 81 eb f1 e6 87 eb ed e6 83 eb e9 cc cc cc cc cc cc cc cc cc cc cc cc cc cc <55> 48 89 e5 41 56 49 89 d6 41 55 49 89 cd 41 54 49 89 f4 53 48 89
RSP: 0018:ffffc90008b18000 EFLAGS: 00010246
RAX: 0000000000000000 RBX: fffff52001163001 RCX: 0000000000000000
RDX: ffff88802b30e480 RSI: ffffc90008b18028 RDI: ffffffff8162c090
RBP: 0000000000000cc0 R08: ffffed1006f83078 R09: ffffed1006f83094
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000cc0
R13: 0000000000000000 R14: ffff88821b77f8c0 R15: 00000000000000e0
FS: 00007f7369ba8700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90008b17ff8 CR3: 00000000a21ec000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123
save_stack+0x1b/0x40 mm/kasan/common.c:48
set_track mm/kasan/common.c:56 [inline]
__kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:494
slab_post_alloc_hook mm/slab.h:586 [inline]
slab_alloc_node mm/slab.c:3263 [inline]
kmem_cache_alloc_node+0x130/0x3c0 mm/slab.c:3575
__alloc_skb+0x71/0x550 net/core/skbuff.c:198
alloc_skb include/linux/skbuff.h:1083 [inline]
nlmsg_new include/net/netlink.h:940 [inline]
rtmsg_ifinfo_build_skb+0x72/0x1a0 net/core/rtnetlink.c:3702
rtmsg_ifinfo_event net/core/rtnetlink.c:3738 [inline]
rtmsg_ifinfo_event net/core/rtnetlink.c:3729 [inline]
rtnetlink_event+0x123/0x1d0 net/core/rtnetlink.c:5512
notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2027
call_netdevice_notifiers_extack net/core/dev.c:2039 [inline]
call_netdevice_notifiers net/core/dev.c:2053 [inline]
netdev_features_change net/core/dev.c:1443 [inline]
netdev_sync_lower_features net/core/dev.c:9056 [inline]
__netdev_update_features+0x88d/0x1360 net/core/dev.c:9187
netdev_change_features+0x61/0xb0 net/core/dev.c:9259
bond_compute_features+0x502/0xa00 drivers/net/bonding/bond_main.c:1188
bond_slave_netdev_event drivers/net/bonding/bond_main.c:3237 [inline]
bond_netdev_event+0x81f/0xb30 drivers/net/bonding/bond_main.c:3277
notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2027
call_netdevice_notifiers_extack net/core/dev.c:2039 [inline]
call_netdevice_notifiers net/core/dev.c:2053 [inline]
netdev_features_change net/core/dev.c:1443 [inline]
netdev_sync_lower_features net/core/dev.c:9056 [inline]
__netdev_update_features+0x88d/0x1360 net/core/dev.c:9187
netdev_change_features+0x61/0xb0 net/core/dev.c:9259
bond_compute_features+0x502/0xa00 drivers/net/bonding/bond_main.c:1188
bond_slave_netdev_event drivers/net/bonding/bond_main.c:3237 [inline]
bond_netdev_event+0x81f/0xb30 drivers/net/bonding/bond_main.c:3277
notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2027
call_netdevice_notifiers_extack net/core/dev.c:2039 [inline]
call_netdevice_notifiers net/core/dev.c:2053 [inline]
netdev_features_change net/core/dev.c:1443 [inline]
netdev_sync_lower_features net/core/dev.c:9056 [inline]
__netdev_update_features+0x88d/0x1360 net/core/dev.c:9187
netdev_change_features+0x61/0xb0 net/core/dev.c:9259
bond_compute_features+0x502/0xa00 drivers/net/bonding/bond_main.c:1188
bond_slave_netdev_event drivers/net/bonding/bond_main.c:3237 [inline]
bond_netdev_event+0x81f/0xb30 drivers/net/bonding/bond_main.c:3277
notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2027
call_netdevice_notifiers_extack net/core/dev.c:2039 [inline]
call_netdevice_notifiers net/core/dev.c:2053 [inline]
netdev_features_change net/core/dev.c:1443 [inline]
netdev_sync_lower_features net/core/dev.c:9056 [inline]
__netdev_update_features+0x88d/0x1360 net/core/dev.c:9187
netdev_change_features+0x61/0xb0 net/core/dev.c:9259
bond_compute_features+0x502/0xa00 drivers/net/bonding/bond_main.c:1188
bond_slave_netdev_event drivers/net/bonding/bond_main.c:3237 [inline]
bond_netdev_event+0x81f/0xb30 drivers/net/bonding/bond_main.c:3277
notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2027
call_netdevice_notifiers_extack net/core/dev.c:2039 [inline]
call_netdevice_notifiers net/core/dev.c:2053 [inline]
netdev_features_change net/core/dev.c:1443 [inline]
netdev_sync_lower_features net/core/dev.c:9056 [inline]
__netdev_update_features+0x88d/0x1360 net/core/dev.c:9187
netdev_change_features+0x61/0xb0 net/core/dev.c:9259
bond_compute_features+0x502/0xa00 drivers/net/bonding/bond_main.c:1188
bond_slave_netdev_event drivers/net/bonding/bond_main.c:3237 [inline]
bond_netdev_event+0x81f/0xb30 drivers/net/bonding/bond_main.c:3277
notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2027
call_netdevice_notifiers_extack net/core/dev.c:2039 [inline]
call_netdevice_notifiers net/core/dev.c:2053 [inline]
netdev_features_change net/core/dev.c:1443 [inline]
netdev_sync_lower_features net/core/dev.c:9056 [inline]
__netdev_update_features+0x88d/0x1360 net/core/dev.c:9187
netdev_change_features+0x61/0xb0 net/core/dev.c:9259
bond_compute_features+0x502/0xa00 drivers/net/bonding/bond_main.c:1188
bond_slave_netdev_event drivers/net/bonding/bond_main.c:3237 [inline]
bond_netdev_event+0x81f/0xb30 drivers/net/bonding/bond_main.c:3277
notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2027
call_netdevice_notifiers_extack net/core/dev.c:2039 [inline]
call_netdevice_notifiers net/core/dev.c:2053 [inline]
netdev_features_change net/core/dev.c:1443 [inline]
netdev_sync_lower_features net/core/dev.c:9056 [inline]
__netdev_update_features+0x88d/0x1360 net/core/dev.c:9187
netdev_change_features+0x61/0xb0 net/core/dev.c:9259
bond_compute_features+0x502/0xa00 drivers/net/bonding/bond_main.c:1188
bond_slave_netdev_event drivers/net/bonding/bond_main.c:3237 [inline]
bond_netdev_event+0x81f/0xb30 drivers/net/bonding/bond_main.c:3277
notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2027
call_netdevice_notifiers_extack net/core/dev.c:2039 [inline]
call_netdevice_notifiers net/core/dev.c:2053 [inline]
netdev_features_change net/core/dev.c:1443 [inline]
netdev_sync_lower_features net/core/dev.c:9056 [inline]
__netdev_update_features+0x88d/0x1360 net/core/dev.c:9187
netdev_change_features+0x61/0xb0 net/core/dev.c:9259
bond_compute_features+0x502/0xa00 drivers/net/bonding/bond_main.c:1188
Lost 536 message(s)!
---[ end trace 00f7ed0d29de9cad ]---
RIP: 0010:arch_stack_walk+0x0/0xf0 arch/x86/kernel/stacktrace.c:17
Code: 8b eb c0 e6 82 89 fa ee ee 8d 57 01 ee ee eb cd e6 81 eb f1 e6 87 eb ed e6 83 eb e9 cc cc cc cc cc cc cc cc cc cc cc cc cc cc <55> 48 89 e5 41 56 49 89 d6 41 55 49 89 cd 41 54 49 89 f4 53 48 89
RSP: 0018:ffffc90008b18000 EFLAGS: 00010246
RAX: 0000000000000000 RBX: fffff52001163001 RCX: 0000000000000000
RDX: ffff88802b30e480 RSI: ffffc90008b18028 RDI: ffffffff8162c090
RBP: 0000000000000cc0 R08: ffffed1006f83078 R09: ffffed1006f83094
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000cc0
R13: 0000000000000000 R14: ffff88821b77f8c0 R15: 00000000000000e0
FS: 00007f7369ba8700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90008b17ff8 CR3: 00000000a21ec000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


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[Josh Poimboeuf]

Hi Cong,

This looks similar to the stack overflow which was attempted to be fixed
by dd912306ff00 ("net: fix a potential recursive NETDEV_FEAT_CHANGE").

And another syzbot report here:

https://lkml.kernel.org/r/000000000000cb...@google.com

--
Josh

[Josh Poimboeuf]

On Mon, Aug 03, 2020 at 04:48:46PM -0500, Josh Poimboeuf wrote:
> Hi Cong,
>
> This looks similar to the stack overflow which was attempted to be fixed
> by dd912306ff00 ("net: fix a potential recursive NETDEV_FEAT_CHANGE").
>
> And another syzbot report here:
>
> https://lkml.kernel.org/r/000000000000cb...@google.com

And another:

https://lkml.kernel.org/r/00000000000008...@google.com

--
Josh

[syzbot]

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