netdev - Re: [PATCH net] tipc: fix NULL pointer dereference in tipc_mon_reinit

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Message-Id: 
 <174537423074.2115098.1335554506325655535.git-patchwork-notify@kernel.org>
Date: Wed, 23 Apr 2025 02:10:30 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Tung Nguyen <tung.quang.nguyen@....tech>
Cc: netdev@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
 edumazet@...gle.com, pabeni@...hat.com, jmaloy@...hat.com,
 syzbot+ed60da8d686dc709164c@...kaller.appspotmail.com
Subject: Re: [PATCH net] tipc: fix NULL pointer dereference in
 tipc_mon_reinit_self()

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Thu, 17 Apr 2025 14:47:15 +0700 you wrote:
> syzbot reported:
> 
> tipc: Node number set to 1055423674
> Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI
> KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
> CPU: 3 UID: 0 PID: 6017 Comm: kworker/3:5 Not tainted 6.15.0-rc1-syzkaller-00246-g900241a5cc15 #0 PREEMPT(full)
> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
> Workqueue: events tipc_net_finalize_work
> RIP: 0010:tipc_mon_reinit_self+0x11c/0x210 net/tipc/monitor.c:719
> ...
> RSP: 0018:ffffc9000356fb68 EFLAGS: 00010246
> RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000003ee87cba
> RDX: 0000000000000000 RSI: ffffffff8dbc56a7 RDI: ffff88804c2cc010
> RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
> R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000007
> R13: fffffbfff2111097 R14: ffff88804ead8000 R15: ffff88804ead9010
> FS:  0000000000000000(0000) GS:ffff888097ab9000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00000000f720eb00 CR3: 000000000e182000 CR4: 0000000000352ef0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
>  <TASK>
>  tipc_net_finalize+0x10b/0x180 net/tipc/net.c:140
>  process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
>  process_scheduled_works kernel/workqueue.c:3319 [inline]
>  worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
>  kthread+0x3c2/0x780 kernel/kthread.c:464
>  ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
>  ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
>  </TASK>
> ...
> RIP: 0010:tipc_mon_reinit_self+0x11c/0x210 net/tipc/monitor.c:719
> ...
> RSP: 0018:ffffc9000356fb68 EFLAGS: 00010246
> RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000003ee87cba
> RDX: 0000000000000000 RSI: ffffffff8dbc56a7 RDI: ffff88804c2cc010
> RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
> R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000007
> R13: fffffbfff2111097 R14: ffff88804ead8000 R15: ffff88804ead9010
> FS:  0000000000000000(0000) GS:ffff888097ab9000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00000000f720eb00 CR3: 000000000e182000 CR4: 0000000000352ef0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> 
> [...]

Here is the summary with links:
  - [net] tipc: fix NULL pointer dereference in tipc_mon_reinit_self()
    https://git.kernel.org/netdev/net/c/d63527e109e8

You are awesome, thank you!
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