Eric Dumazet d0ac89f6f9 net: deal with most data-races in sk_wait_event() ... __condition is evaluated twice in sk_wait_event() macro. First invocation is lockless, and reads can race with writes, as spotted by syzbot. BUG: KCSAN: data-race in sk_stream_wait_connect / tcp_disconnect write to 0xffff88812d83d6a0 of 4 bytes by task 9065 on cpu 1: tcp_disconnect+0x2cd/0xdb0 inet_shutdown+0x19e/0x1f0 net/ipv4/af_inet.c:911 __sys_shutdown_sock net/socket.c:2343 [inline] __sys_shutdown net/socket.c:2355 [inline] __do_sys_shutdown net/socket.c:2363 [inline] __se_sys_shutdown+0xf8/0x140 net/socket.c:2361 __x64_sys_shutdown+0x31/0x40 net/socket.c:2361 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffff88812d83d6a0 of 4 bytes by task 9040 on cpu 0: sk_stream_wait_connect+0x1de/0x3a0 net/core/stream.c:75 tcp_sendmsg_locked+0x2e4/0x2120 net/ipv4/tcp.c:1266 tcp_sendmsg+0x30/0x50 net/ipv4/tcp.c:1484 inet6_sendmsg+0x63/0x80 net/ipv6/af_inet6.c:651 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg net/socket.c:747 [inline] __sys_sendto+0x246/0x300 net/socket.c:2142 __do_sys_sendto net/socket.c:2154 [inline] __se_sys_sendto net/socket.c:2150 [inline] __x64_sys_sendto+0x78/0x90 net/socket.c:2150 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x00000000 -> 0x00000068 Fixes: 1da177e4c3 ("Linux-2.6.12-rc2") Reported-by: syzbot <syzkaller@googlegroups.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2023-05-10 10:03:32 +01:00
..
af_llc.c	net: deal with most data-races in sk_wait_event()	2023-05-10 10:03:32 +01:00
Kconfig	net: remove redundant 'depends on NET'	2021-01-27 17:04:12 -08:00
llc_c_ac.c	llc/snap: constify dev_addr passing	2021-10-13 09:40:46 -07:00
llc_c_ev.c	net: llc: Correct some function names in header	2021-03-26 15:24:14 -07:00
llc_c_st.c
llc_conn.c	net: llc: Fix kerneldoc warnings	2020-10-30 11:34:09 -07:00
llc_core.c	llc: llc_core.c: COuple of typo fixes	2021-03-28 17:31:13 -07:00
llc_if.c	llc/snap: constify dev_addr passing	2021-10-13 09:40:46 -07:00
llc_input.c
llc_output.c	llc/snap: constify dev_addr passing	2021-10-13 09:40:46 -07:00
llc_pdu.c	net: llc: Correct function name llc_pdu_set_pf_bit() in header	2021-03-26 15:24:14 -07:00
llc_proc.c	sock: Use sock_owned_by_user_nocheck() instead of sk_lock.owned.	2021-12-10 19:43:00 -08:00
llc_s_ac.c	net: llc: fix skb_over_panic	2021-07-27 13:05:56 +01:00
llc_s_ev.c
llc_s_st.c
llc_sap.c
llc_station.c	llc2: Remove redundant assignment to rc	2021-04-27 14:16:14 -07:00
Makefile
sysctl_net_llc.c