From: Jiayuan Chen <jiayuan.chen@linux.dev>
To: bpf@vger.kernel.org
Cc: borisp@nvidia.com, john.fastabend@gmail.com, kuba@kernel.org,
davem@davemloft.net, edumazet@google.com, pabeni@redhat.com,
horms@kernel.org, andrii@kernel.org, eddyz87@gmail.com,
mykolal@fb.com, ast@kernel.org, daniel@iogearbox.net,
martin.lau@linux.dev, song@kernel.org, yonghong.song@linux.dev,
kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com,
jolsa@kernel.org, shuah@kernel.org, netdev@vger.kernel.org,
linux-kselftest@vger.kernel.org, viro@zeniv.linux.org.uk,
mrpre@163.com, Jiayuan Chen <jiayuan.chen@linux.dev>
Subject: [PATCH bpf-next v2 0/2] bpf: fix ktls panic with sockmap and add tests
Date: Wed, 19 Feb 2025 13:20:13 +0800 [thread overview]
Message-ID: <20250219052015.274405-1-jiayuan.chen@linux.dev> (raw)
We can reproduce the issue using the existing test program:
'./test_sockmap --ktls'
Or use the selftest I provided, which will cause a panic:
------------[ cut here ]------------
kernel BUG at lib/iov_iter.c:629!
PKRU: 55555554
Call Trace:
<TASK>
? die+0x36/0x90
? do_trap+0xdd/0x100
? iov_iter_revert+0x178/0x180
? iov_iter_revert+0x178/0x180
? do_error_trap+0x7d/0x110
? iov_iter_revert+0x178/0x180
? exc_invalid_op+0x50/0x70
? iov_iter_revert+0x178/0x180
? asm_exc_invalid_op+0x1a/0x20
? iov_iter_revert+0x178/0x180
? iov_iter_revert+0x5c/0x180
tls_sw_sendmsg_locked.isra.0+0x794/0x840
tls_sw_sendmsg+0x52/0x80
? inet_sendmsg+0x1f/0x70
__sys_sendto+0x1cd/0x200
? find_held_lock+0x2b/0x80
? syscall_trace_enter+0x140/0x270
? __lock_release.isra.0+0x5e/0x170
? find_held_lock+0x2b/0x80
? syscall_trace_enter+0x140/0x270
? lockdep_hardirqs_on_prepare+0xda/0x190
? ktime_get_coarse_real_ts64+0xc2/0xd0
__x64_sys_sendto+0x24/0x30
do_syscall_64+0x90/0x170
1. It looks like the issue started occurring after bpf being introduced to
ktls and later the addition of assertions to iov_iter has caused a panic.
If my fix tag is incorrect, please assist me in correcting the fix tag.
2. I make minimal changes for now, it's enough to make ktls work
correctly.
---
v1->v2: Added more content to the commit message
https://lore.kernel.org/all/20250123171552.57345-1-mrpre@163.com/#r
---
Jiayuan Chen (2):
bpf: fix ktls panic with sockmap
selftests/bpf: add ktls selftest
net/tls/tls_sw.c | 8 +-
.../selftests/bpf/prog_tests/sockmap_ktls.c | 174 +++++++++++++++++-
.../selftests/bpf/progs/test_sockmap_ktls.c | 26 +++
3 files changed, 205 insertions(+), 3 deletions(-)
create mode 100644 tools/testing/selftests/bpf/progs/test_sockmap_ktls.c
--
2.47.1
next reply other threads:[~2025-02-19 5:21 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-19 5:20 Jiayuan Chen [this message]
2025-02-19 5:20 ` [PATCH bpf-next v2 1/2] bpf: fix ktls panic with sockmap Jiayuan Chen
2025-02-19 5:20 ` [PATCH bpf-next v2 2/2] selftests/bpf: add ktls selftest Jiayuan Chen
2025-04-02 23:49 ` John Fastabend
2025-04-10 3:00 ` [PATCH bpf-next v2 0/2] bpf: fix ktls panic with sockmap and add tests patchwork-bot+netdevbpf
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