general protection fault in em_cmp

Kernel	Title	Repro	Cause bisect	Count	Last	Reported	Patched	Status
android-5-10	general protection fault in em_cmp_match	C	error	1	495d	495d	2/2	fixed on 2023/05/04 14:51
linux-4.14	general protection fault in em_cmp_match	C		1	487d	487d	1/1	fixed on 2023/01/18 11:20
android-5-15	general protection fault in em_cmp_match	C	error	1	495d	495d	2/2	fixed on 2023/02/02 00:40
upstream	general protection fault in em_cmp_match net	C		4	495d	491d	22/26	fixed on 2023/02/24 13:50

kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 19 Comm: kworker/1:0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: ipv6_addrconf addrconf_dad_work RIP: 0010:em_cmp_match+0x51/0x590 net/sched/em_cmp.c:29 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 f7 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 08 48 8d 7d 0a 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 93 RSP: 0018:ffff8880b5ad6bc0 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff8880a712ac80 RCX: ffffffff869f8a05 RDX: 0000000000000001 RSI: ffffffff869fa079 RDI: 000000000000000a RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000004 R11: 0000000000000000 R12: ffff8880ab454e00 R13: ffff8880a712ac80 R14: ffffffff8ae79960 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f08c504b3b0 CR3: 0000000009e6d000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tcf_em_match net/sched/ematch.c:496 [inline] __tcf_em_tree_match+0x14a/0x530 net/sched/ematch.c:522 tcf_em_tree_match include/net/pkt_cls.h:531 [inline] basic_classify+0x1c0/0x2b0 net/sched/cls_basic.c:49 tcf_classify+0x120/0x3c0 net/sched/cls_api.c:979 prio_classify net/sched/sch_prio.c:46 [inline] prio_enqueue+0x3bb/0x7a0 net/sched/sch_prio.c:78 __dev_xmit_skb net/core/dev.c:3494 [inline] __dev_queue_xmit+0x140a/0x2e00 net/core/dev.c:3807 neigh_hh_output include/net/neighbour.h:491 [inline] neigh_output include/net/neighbour.h:499 [inline] ip_finish_output2+0xb6d/0x15a0 net/ipv4/ip_output.c:230 ip_finish_output+0xae9/0x10b0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x203/0x5f0 net/ipv4/ip_output.c:406 dst_output include/net/dst.h:455 [inline] ip_local_out+0xaf/0x170 net/ipv4/ip_output.c:125 iptunnel_xmit+0x63b/0x9d0 net/ipv4/ip_tunnel_core.c:91 geneve_xmit_skb drivers/net/geneve.c:867 [inline] geneve_xmit+0x120d/0x2e60 drivers/net/geneve.c:943 __netdev_start_xmit include/linux/netdevice.h:4349 [inline] netdev_start_xmit include/linux/netdevice.h:4363 [inline] xmit_one net/core/dev.c:3256 [inline] dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272 __dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838 neigh_resolve_output+0x55a/0x910 net/core/neighbour.c:1374 neigh_output include/net/neighbour.h:501 [inline] ip6_finish_output2+0x113d/0x2290 net/ipv6/ip6_output.c:120 ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:455 [inline] NF_HOOK include/linux/netfilter.h:289 [inline] ndisc_send_skb+0xa24/0x1720 net/ipv6/ndisc.c:491 ndisc_send_ns+0x51d/0x840 net/ipv6/ndisc.c:633 addrconf_dad_work+0xb0e/0x10a0 net/ipv6/addrconf.c:4076 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Modules linked in: ---[ end trace 41d185f023e8efc0 ]--- RIP: 0010:em_cmp_match+0x51/0x590 net/sched/em_cmp.c:29 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 f7 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 08 48 8d 7d 0a 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 93 RSP: 0018:ffff8880b5ad6bc0 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff8880a712ac80 RCX: ffffffff869f8a05 RDX: 0000000000000001 RSI: ffffffff869fa079 RDI: 000000000000000a RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000004 R11: 0000000000000000 R12: ffff8880ab454e00 R13: ffff8880a712ac80 R14: ffffffff8ae79960 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f08c504b3b0 CR3: 0000000009e6d000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 89 fa mov %rdi,%rdx 3: 48 c1 ea 03 shr $0x3,%rdx 7: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) b: 0f 85 f7 04 00 00 jne 0x508 11: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 18: fc ff df 1b: 48 8b 6b 08 mov 0x8(%rbx),%rbp 1f: 48 8d 7d 0a lea 0xa(%rbp),%rdi 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx <-- trapping instruction 2e: 48 89 f8 mov %rdi,%rax 31: 83 e0 07 and $0x7,%eax 34: 83 c0 01 add $0x1,%eax 37: 38 d0 cmp %dl,%al 39: 7c 08 jl 0x43 3b: 84 d2 test %dl,%dl 3d: 0f .byte 0xf 3e: 85 .byte 0x85 3f: 93 xchg %eax,%ebx

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2022/12/14 11:01	linux-4.19.y	3f8a27f9e27b	f6511626	.config	console log	report	syz	C		[disk image] [vmlinux]	ci2-linux-4-19	general protection fault in em_cmp_match

Crashes (1):

Assets (help?)