| Message ID | ad1ecbd205b357f1f73500522a2d495cb6c0cbe1.1719302367.git.tanggeliang@kylinos.cn (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Fixes for BPF selftests on Loongarch | expand |
On Tue, Jun 25, 2024 at 10:25 AM Geliang Tang <geliang@kernel.org> wrote: > > From: Geliang Tang <tanggeliang@kylinos.cn> > > Run the following BPF selftests on Loongarch: > > ./test_progs -t sockmap_listen > > A Kernel panic occurs: > > ''' > Oops[#1]: > CPU: 49 PID: 233429 Comm: new_name Tainted: G OE 6.10.0-rc2+ #20 > Hardware name: LOONGSON Dabieshan/Loongson-TC542F0, BIOS Loongson-UDK2018-V4.0.11 > pc 0000000000000000 ra 90000000051ea4a0 tp 900030008549c000 sp 900030008549fe00 > a0 9000300152524a00 a1 0000000000000000 a2 900030008549fe38 a3 900030008549fe30 > a4 900030008549fe30 a5 90003000c58c8d80 a6 0000000000000000 a7 0000000000000039 > t0 0000000000000000 t1 90003000c58c8d80 t2 0000000000000001 t3 0000000000000000 > t4 0000000000000001 t5 900000011a1bf580 t6 900000011a3aff60 t7 000000000000006b > t8 00000fffffffffff u0 0000000000000000 s9 00007fffbbe9e930 s0 9000300152524a00 > s1 90003000c58c8d00 s2 9000000006c81568 s3 0000000000000000 s4 90003000c58c8d80 > s5 00007ffff236a000 s6 00007ffffbc292b0 s7 00007ffffbc29998 s8 00007fffbbe9f180 > ra: 90000000051ea4a0 inet_release+0x60/0xc0 > ERA: 0000000000000000 0x0 > CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE) > PRMD: 0000000c (PPLV0 +PIE +PWE) > EUEN: 00000000 (-FPE -SXE -ASXE -BTE) > ECFG: 00071c1d (LIE=0,2-4,10-12 VS=7) > ESTAT: 00030000 [PIF] (IS= ECode=3 EsubCode=0) > BADV: 0000000000000000 > PRID: 0014c011 (Loongson-64bit, Loongson-3C5000) > Modules linked in: xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_nat_tftp > Process new_name (pid: 233429, threadinfo=00000000b9196405, task=00000000c01df45b) > Stack : 0000000000000000 90003000c58c8e20 90003000c58c8d00 900000000505960c > 0000000000000000 9000000101c6ad20 9000300086524540 00000000082e0003 > 900030008bf57400 90000000050596bc 900030008bf57400 900000000434acac > 0000000000000016 00007ffff224e060 00007fffbbe9f180 900030008bf57400 > 0000000000000000 9000000004341ce0 00007fffbbe9f180 00007ffff2369000 > 900030008549fec0 90000000054476ec 000000000000006b 9000000003f71da4 > 000000000000003a 00007ffff22b8a44 00007fffbbe9f8e0 00007fffbbe9e680 > ffffffffffffffda 0000000000000000 0000000000000000 0000000000000000 > 00007fffbbe9f288 0000000000000000 0000000000000000 0000000000000039 > 84c2431493ceab6e 84c23ceb2827425e 0000000000000007 00007ffff2271600 > ... > Call Trace: > [<900000000505960c>] __sock_release+0x4c/0xe0 > [<90000000050596bc>] sock_close+0x1c/0x40 > [<900000000434acac>] __fput+0xec/0x2e0 > [<9000000004341ce0>] sys_close+0x40/0xa0 > [<90000000054476ec>] do_syscall+0x8c/0xc0 > [<9000000003f71da4>] handle_syscall+0xc4/0x160 > > Code: (Bad address in era) > > ---[ end trace 0000000000000000 ]--- > Kernel panic - not syncing: Fatal exception > Kernel relocated by 0x3d50000 > .text @ 0x9000000003f50000 > .data @ 0x90000000055b0000 > .bss @ 0x9000000006ca9400 > ---[ end Kernel panic - not syncing: Fatal exception ]--- > ''' > > This is because "sk->sk_prot->close" pointer is NULL in that case. This > patch adds null check for it in inet_release() to fix this error. > > Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") > Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn> > --- > net/ipv4/af_inet.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c > index b24d74616637..34a719e98c69 100644 > --- a/net/ipv4/af_inet.c > +++ b/net/ipv4/af_inet.c > @@ -434,7 +434,8 @@ int inet_release(struct socket *sock) > if (sock_flag(sk, SOCK_LINGER) && > !(current->flags & PF_EXITING)) > timeout = sk->sk_lingertime; > - sk->sk_prot->close(sk, timeout); > + if (sk->sk_prot->close) > + sk->sk_prot->close(sk, timeout); Can you tell us which inet protocol does not have a ->close pointer ? I find it hard to believe a day-0 bug only hit Loongarch arch in 2024.
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index b24d74616637..34a719e98c69 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -434,7 +434,8 @@ int inet_release(struct socket *sock) if (sock_flag(sk, SOCK_LINGER) && !(current->flags & PF_EXITING)) timeout = sk->sk_lingertime; - sk->sk_prot->close(sk, timeout); + if (sk->sk_prot->close) + sk->sk_prot->close(sk, timeout); sock->sk = NULL; } return 0;