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| Filename | Latest commit message | Latest commit date |
|---|---|---|
1fee7e391d
[ Upstream commit 8c5c2a4898e3d6bad86e29d471e023c8a19ba799 ]
syzbot reported a splat and bisected it to recent commit ed17aa92dc56 ("bpf,
sockmap: fix deadlocks in the sockhash and sockmap"):
[...]
WARNING: CPU: 1 PID: 9280 at kernel/softirq.c:376 __local_bh_enable_ip+0xbe/0x130 kernel/softirq.c:376
Modules linked in:
CPU: 1 PID: 9280 Comm: syz-executor.1 Not tainted 6.2.0-syzkaller-13249-gd319f344561d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
RIP: 0010:__local_bh_enable_ip+0xbe/0x130 kernel/softirq.c:376
[...]
Call Trace:
<TASK>
spin_unlock_bh include/linux/spinlock.h:395 [inline]
sock_map_del_link+0x2ea/0x510 net/core/sock_map.c:165
sock_map_unref+0xb0/0x1d0 net/core/sock_map.c:184
sock_hash_delete_elem+0x1ec/0x2a0 net/core/sock_map.c:945
map_delete_elem kernel/bpf/syscall.c:1536 [inline]
__sys_bpf+0x2edc/0x53e0 kernel/bpf/syscall.c:5053
__do_sys_bpf kernel/bpf/syscall.c:5166 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5164 [inline]
__x64_sys_bpf+0x79/0xc0 kernel/bpf/syscall.c:5164
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe8f7c8c169
</TASK>
[...]
Revert for now until we have a proper solution.
Fixes: ed17aa92dc56 ("bpf, sockmap: fix deadlocks in the sockhash and sockmap")
Reported-by: syzbot+49f6cef45247ff249498@syzkaller.appspotmail.com
Cc: Hsin-Wei Hung <hsinweih@uci.edu>
Cc: Xin Liu <liuxin350@huawei.com>
Cc: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/000000000000f1db9605f939720e@google.com/
Signed-off-by: Sasha Levin <sashal@kernel.org>
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.