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d6938c1c76
Inside decrement_ttl() upon discovering that the packet ttl has exceeded,
__IP_INC_STATS and __IP6_INC_STATS macros can be called from preemptible
context having the following backtrace:
check_preemption_disabled: 48 callbacks suppressed
BUG: using __this_cpu_add() in preemptible [00000000] code: curl/1177
caller is decrement_ttl+0x217/0x830
CPU: 5 PID: 1177 Comm: curl Not tainted 6.7.0+ #34
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0xbd/0xe0
check_preemption_disabled+0xd1/0xe0
decrement_ttl+0x217/0x830
__ip_vs_get_out_rt+0x4e0/0x1ef0
ip_vs_nat_xmit+0x205/0xcd0
ip_vs_in_hook+0x9b1/0x26a0
nf_hook_slow+0xc2/0x210
nf_hook+0x1fb/0x770
__ip_local_out+0x33b/0x640
ip_local_out+0x2a/0x490
__ip_queue_xmit+0x990/0x1d10
__tcp_transmit_skb+0x288b/0x3d10
tcp_connect+0x3466/0x5180
tcp_v4_connect+0x1535/0x1bb0
__inet_stream_connect+0x40d/0x1040
inet_stream_connect+0x57/0xa0
__sys_connect_file+0x162/0x1a0
__sys_connect+0x137/0x160
__x64_sys_connect+0x72/0xb0
do_syscall_64+0x6f/0x140
entry_SYSCALL_64_after_hwframe+0x6e/0x76
RIP: 0033:0x7fe6dbbc34e0
Use the corresponding preemption-aware variants: IP_INC_STATS and
IP6_INC_STATS.
Found by Linux Verification Center (linuxtesting.org).
Fixes:
|
||
|---|---|---|
| .. | ||
| ip_vs_app.c | ||
| ip_vs_conn.c | ||
| ip_vs_core.c | ||
| ip_vs_ctl.c | ||
| ip_vs_dh.c | ||
| ip_vs_est.c | ||
| ip_vs_fo.c | ||
| ip_vs_ftp.c | ||
| ip_vs_lblc.c | ||
| ip_vs_lblcr.c | ||
| ip_vs_lc.c | ||
| ip_vs_mh.c | ||
| ip_vs_nfct.c | ||
| ip_vs_nq.c | ||
| ip_vs_ovf.c | ||
| ip_vs_pe_sip.c | ||
| ip_vs_pe.c | ||
| ip_vs_proto_ah_esp.c | ||
| ip_vs_proto_sctp.c | ||
| ip_vs_proto_tcp.c | ||
| ip_vs_proto_udp.c | ||
| ip_vs_proto.c | ||
| ip_vs_rr.c | ||
| ip_vs_sched.c | ||
| ip_vs_sed.c | ||
| ip_vs_sh.c | ||
| ip_vs_sync.c | ||
| ip_vs_twos.c | ||
| ip_vs_wlc.c | ||
| ip_vs_wrr.c | ||
| ip_vs_xmit.c | ||
| Kconfig | ||
| Makefile | ||