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![]() Syzbot report a kernel-infoleak: BUG: KMSAN: kernel-infoleak in _copy_to_user+0x16b/0x1f0 lib/usercopy.c:32 Call Trace: _copy_to_user+0x16b/0x1f0 lib/usercopy.c:32 copy_to_user include/linux/uaccess.h:174 [inline] sctp_getsockopt_peer_addrs net/sctp/socket.c:5911 [inline] sctp_getsockopt+0x1668e/0x17f70 net/sctp/socket.c:7562 ... Uninit was stored to memory at: sctp_transport_init net/sctp/transport.c:61 [inline] sctp_transport_new+0x16d/0x9a0 net/sctp/transport.c:115 sctp_assoc_add_peer+0x532/0x1f70 net/sctp/associola.c:637 sctp_process_param net/sctp/sm_make_chunk.c:2548 [inline] sctp_process_init+0x1a1b/0x3ed0 net/sctp/sm_make_chunk.c:2361 ... Bytes 8-15 of 16 are uninitialized It was caused by that th _pad field (the 8-15 bytes) of a v4 addr (saved in struct sockaddr_in) wasn't initialized, but directly copied to user memory in sctp_getsockopt_peer_addrs(). So fix it by calling memset(addr->v4.sin_zero, 0, 8) to initialize _pad of sockaddr_in before copying it to user memory in sctp_v4_addr_to_user(), as sctp_v6_addr_to_user() does. Reported-by: syzbot+86b5c7c236a22616a72f@syzkaller.appspotmail.com Signed-off-by: Xin Long <lucien.xin@gmail.com> Tested-by: Alexander Potapenko <glider@google.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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.. | ||
associola.c | ||
auth.c | ||
bind_addr.c | ||
chunk.c | ||
debug.c | ||
diag.c | ||
endpointola.c | ||
input.c | ||
inqueue.c | ||
ipv6.c | ||
Kconfig | ||
Makefile | ||
objcnt.c | ||
offload.c | ||
output.c | ||
outqueue.c | ||
primitive.c | ||
proc.c | ||
protocol.c | ||
sm_make_chunk.c | ||
sm_sideeffect.c | ||
sm_statefuns.c | ||
sm_statetable.c | ||
socket.c | ||
stream.c | ||
stream_interleave.c | ||
stream_sched.c | ||
stream_sched_prio.c | ||
stream_sched_rr.c | ||
sysctl.c | ||
transport.c | ||
tsnmap.c | ||
ulpevent.c | ||
ulpqueue.c |