Message-Id: 
 <170633282436.26577.2518397723028445430.git-patchwork-notify@kernel.org>
Date: Sat, 27 Jan 2024 05:20:24 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Nicolas Dichtel <nicolas.dichtel@...nd.com>
Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
 edumazet@...gle.com, leone4fernando@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH net v2] ipmr: fix kernel panic when forwarding mcast packets

Hello:

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

On Thu, 25 Jan 2024 15:18:47 +0100 you wrote:
> The stacktrace was:
> [   86.305548] BUG: kernel NULL pointer dereference, address: 0000000000000092
> [   86.306815] #PF: supervisor read access in kernel mode
> [   86.307717] #PF: error_code(0x0000) - not-present page
> [   86.308624] PGD 0 P4D 0
> [   86.309091] Oops: 0000 [#1] PREEMPT SMP NOPTI
> [   86.309883] CPU: 2 PID: 3139 Comm: pimd Tainted: G     U             6.8.0-6wind-knet #1
> [   86.311027] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.11.1-0-g0551a4be2c-prebuilt.qemu-project.org 04/01/2014
> [   86.312728] RIP: 0010:ip_mr_forward (/build/work/knet/net/ipv4/ipmr.c:1985)
> [ 86.313399] Code: f9 1f 0f 87 85 03 00 00 48 8d 04 5b 48 8d 04 83 49 8d 44 c5 00 48 8b 40 70 48 39 c2 0f 84 d9 00 00 00 49 8b 46 58 48 83 e0 fe <80> b8 92 00 00 00 00 0f 84 55 ff ff ff 49 83 47 38 01 45 85 e4 0f
> [   86.316565] RSP: 0018:ffffad21c0583ae0 EFLAGS: 00010246
> [   86.317497] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
> [   86.318596] RDX: ffff9559cb46c000 RSI: 0000000000000000 RDI: 0000000000000000
> [   86.319627] RBP: ffffad21c0583b30 R08: 0000000000000000 R09: 0000000000000000
> [   86.320650] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
> [   86.321672] R13: ffff9559c093a000 R14: ffff9559cc00b800 R15: ffff9559c09c1d80
> [   86.322873] FS:  00007f85db661980(0000) GS:ffff955a79d00000(0000) knlGS:0000000000000000
> [   86.324291] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [   86.325314] CR2: 0000000000000092 CR3: 000000002f13a000 CR4: 0000000000350ef0
> [   86.326589] Call Trace:
> [   86.327036]  <TASK>
> [   86.327434] ? show_regs (/build/work/knet/arch/x86/kernel/dumpstack.c:479)
> [   86.328049] ? __die (/build/work/knet/arch/x86/kernel/dumpstack.c:421 /build/work/knet/arch/x86/kernel/dumpstack.c:434)
> [   86.328508] ? page_fault_oops (/build/work/knet/arch/x86/mm/fault.c:707)
> [   86.329107] ? do_user_addr_fault (/build/work/knet/arch/x86/mm/fault.c:1264)
> [   86.329756] ? srso_return_thunk (/build/work/knet/arch/x86/lib/retpoline.S:223)
> [   86.330350] ? __irq_work_queue_local (/build/work/knet/kernel/irq_work.c:111 (discriminator 1))
> [   86.331013] ? exc_page_fault (/build/work/knet/./arch/x86/include/asm/paravirt.h:693 /build/work/knet/arch/x86/mm/fault.c:1515 /build/work/knet/arch/x86/mm/fault.c:1563)
> [   86.331702] ? asm_exc_page_fault (/build/work/knet/./arch/x86/include/asm/idtentry.h:570)
> [   86.332468] ? ip_mr_forward (/build/work/knet/net/ipv4/ipmr.c:1985)
> [   86.333183] ? srso_return_thunk (/build/work/knet/arch/x86/lib/retpoline.S:223)
> [   86.333920] ipmr_mfc_add (/build/work/knet/./include/linux/rcupdate.h:782 /build/work/knet/net/ipv4/ipmr.c:1009 /build/work/knet/net/ipv4/ipmr.c:1273)
> [   86.334583] ? __pfx_ipmr_hash_cmp (/build/work/knet/net/ipv4/ipmr.c:363)
> [   86.335357] ip_mroute_setsockopt (/build/work/knet/net/ipv4/ipmr.c:1470)
> [   86.336135] ? srso_return_thunk (/build/work/knet/arch/x86/lib/retpoline.S:223)
> [   86.336854] ? ip_mroute_setsockopt (/build/work/knet/net/ipv4/ipmr.c:1470)
> [   86.337679] do_ip_setsockopt (/build/work/knet/net/ipv4/ip_sockglue.c:944)
> [   86.338408] ? __pfx_unix_stream_read_actor (/build/work/knet/net/unix/af_unix.c:2862)
> [   86.339232] ? srso_return_thunk (/build/work/knet/arch/x86/lib/retpoline.S:223)
> [   86.339809] ? aa_sk_perm (/build/work/knet/security/apparmor/include/cred.h:153 /build/work/knet/security/apparmor/net.c:181)
> [   86.340342] ip_setsockopt (/build/work/knet/net/ipv4/ip_sockglue.c:1415)
> [   86.340859] raw_setsockopt (/build/work/knet/net/ipv4/raw.c:836)
> [   86.341408] ? security_socket_setsockopt (/build/work/knet/security/security.c:4561 (discriminator 13))
> [   86.342116] sock_common_setsockopt (/build/work/knet/net/core/sock.c:3716)
> [   86.342747] do_sock_setsockopt (/build/work/knet/net/socket.c:2313)
> [   86.343363] __sys_setsockopt (/build/work/knet/./include/linux/file.h:32 /build/work/knet/net/socket.c:2336)
> [   86.344020] __x64_sys_setsockopt (/build/work/knet/net/socket.c:2340)
> [   86.344766] do_syscall_64 (/build/work/knet/arch/x86/entry/common.c:52 /build/work/knet/arch/x86/entry/common.c:83)
> [   86.345433] ? srso_return_thunk (/build/work/knet/arch/x86/lib/retpoline.S:223)
> [   86.346161] ? syscall_exit_work (/build/work/knet/./include/linux/audit.h:357 /build/work/knet/kernel/entry/common.c:160)
> [   86.346938] ? srso_return_thunk (/build/work/knet/arch/x86/lib/retpoline.S:223)
> [   86.347657] ? syscall_exit_to_user_mode (/build/work/knet/kernel/entry/common.c:215)
> [   86.348538] ? srso_return_thunk (/build/work/knet/arch/x86/lib/retpoline.S:223)
> [   86.349262] ? do_syscall_64 (/build/work/knet/./arch/x86/include/asm/cpufeature.h:171 /build/work/knet/arch/x86/entry/common.c:98)
> [   86.349971] entry_SYSCALL_64_after_hwframe (/build/work/knet/arch/x86/entry/entry_64.S:129)
> 
> [...]

Here is the summary with links:
  - [net,v2] ipmr: fix kernel panic when forwarding mcast packets
    https://git.kernel.org/netdev/net/c/e622502c310f

You are awesome, thank you!
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