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Message-Id: <168448322080.32188.9310241476362959617.git-patchwork-notify@kernel.org> Date: Fri, 19 May 2023 08:00:20 +0000 From: patchwork-bot+netdevbpf@...nel.org To: Wen Gu <guwen@...ux.alibaba.com> Cc: kgraul@...ux.ibm.com, wenjia@...ux.ibm.com, jaka@...ux.ibm.com, davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com, linux-s390@...r.kernel.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, liuyacan@...p.netease.com Subject: Re: [PATCH net] net/smc: Reset connection when trying to use SMCRv2 fails. Hello: This patch was applied to netdev/net.git (main) by David S. Miller <davem@...emloft.net>: On Thu, 18 May 2023 13:14:55 +0800 you wrote: > We found a crash when using SMCRv2 with 2 Mellanox ConnectX-4. It > can be reproduced by: > > - smc_run nginx > - smc_run wrk -t 32 -c 500 -d 30 http://<ip>:<port> > > BUG: kernel NULL pointer dereference, address: 0000000000000014 > #PF: supervisor read access in kernel mode > #PF: error_code(0x0000) - not-present page > PGD 8000000108713067 P4D 8000000108713067 PUD 151127067 PMD 0 > Oops: 0000 [#1] PREEMPT SMP PTI > CPU: 4 PID: 2441 Comm: kworker/4:249 Kdump: loaded Tainted: G W E 6.4.0-rc1+ #42 > Workqueue: smc_hs_wq smc_listen_work [smc] > RIP: 0010:smc_clc_send_confirm_accept+0x284/0x580 [smc] > RSP: 0018:ffffb8294b2d7c78 EFLAGS: 00010a06 > RAX: ffff8f1873238880 RBX: ffffb8294b2d7dc8 RCX: 0000000000000000 > RDX: 00000000000000b4 RSI: 0000000000000001 RDI: 0000000000b40c00 > RBP: ffffb8294b2d7db8 R08: ffff8f1815c5860c R09: 0000000000000000 > R10: 0000000000000400 R11: 0000000000000000 R12: ffff8f1846f56180 > R13: ffff8f1815c5860c R14: 0000000000000001 R15: 0000000000000001 > FS: 0000000000000000(0000) GS:ffff8f1aefd00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000000000014 CR3: 00000001027a0001 CR4: 00000000003706e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <TASK> > ? mlx5_ib_map_mr_sg+0xa1/0xd0 [mlx5_ib] > ? smcr_buf_map_link+0x24b/0x290 [smc] > ? __smc_buf_create+0x4ee/0x9b0 [smc] > smc_clc_send_accept+0x4c/0xb0 [smc] > smc_listen_work+0x346/0x650 [smc] > ? __schedule+0x279/0x820 > process_one_work+0x1e5/0x3f0 > worker_thread+0x4d/0x2f0 > ? __pfx_worker_thread+0x10/0x10 > kthread+0xe5/0x120 > ? __pfx_kthread+0x10/0x10 > ret_from_fork+0x2c/0x50 > </TASK> > > [...] Here is the summary with links: - [net] net/smc: Reset connection when trying to use SMCRv2 fails. https://git.kernel.org/netdev/net/c/35112271672a You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html
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