UBSAN: shift-out-of-bounds in gred

Title	Replies (including bot)	Last reply
UBSAN: shift-out-of-bounds in gred_change	1 (2)	2021/01/05 23:33

IPVS: ftp: loaded support on port[0] = 21 ================================================================================ UBSAN: shift-out-of-bounds in ./include/net/red.h:252:22 shift exponent 255 is too large for 32-bit type 'int' CPU: 0 PID: 8465 Comm: syz-executor194 Not tainted 5.10.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 ubsan_epilogue+0xb/0x5a lib/ubsan.c:148 __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 lib/ubsan.c:395 red_set_parms include/net/red.h:252 [inline] gred_change_vq net/sched/sch_gred.c:506 [inline] gred_change.cold+0xce/0xe2 net/sched/sch_gred.c:702 qdisc_change net/sched/sch_api.c:1331 [inline] tc_modify_qdisc+0xd4e/0x1a30 net/sched/sch_api.c:1633 rtnetlink_rcv_msg+0x493/0xb40 net/core/rtnetlink.c:5564 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x907/0xe10 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xd3/0x130 net/socket.c:672 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2336 ___sys_sendmsg+0xf3/0x170 net/socket.c:2390 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2423 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x440e69 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 0b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fff634be6d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004a2730 RCX: 0000000000440e69 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 00007fff634be6e0 R08: 0000000120080522 R09: 0000000120080522 R10: 0000000120080522 R11: 0000000000000246 R12: 00000000004a2730 R13: 0000000000402390 R14: 0000000000000000 R15: 0000000000000000 ================================================================================

Crashes (5):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Manager	Title
2020/12/27 21:37	net-next-old	3db1a3fa9880	2242f77f	.config	console log	report	syz	C		ci-upstream-net-kasan-gce
2021/02/24 11:04	net-next-old	d310ec03a34e	fcc6d71b	.config	console log	report			info	ci-upstream-net-kasan-gce	UBSAN: shift-out-of-bounds in gred_change
2021/01/18 03:54	net-next-old	213b97b12580	fd103621	.config	console log	report			info	ci-upstream-net-kasan-gce	UBSAN: shift-out-of-bounds in gred_change
2021/01/02 20:40	net-next-old	3db1a3fa9880	79264ae3	.config	console log	report			info	ci-upstream-net-kasan-gce
2020/12/27 21:05	net-next-old	3db1a3fa9880	2242f77f	.config	console log	report			info	ci-upstream-net-kasan-gce

Crashes (5):

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