8<--- cut here --- Unable to handle kernel paging request at virtual address df000000 when read [df000000] *pgd=80000080007003, *pmd=00000000 Internal error: Oops: 206 [#1] PREEMPT SMP ARM Modules linked in: CPU: 0 PID: 5515 Comm: syz-executor.0 Not tainted 6.4.0-rc5-syzkaller #0 Hardware name: ARM-Versatile Express PC is at csum_partial+0x40/0x130 arch/arm/lib/csumpartial.S:120 LR is at 0x0 pc : [<817acd68>] lr : [<00000000>] psr: 80000013 sp : eb40db38 ip : a5012000 fp : eb40db94 r10: 813146b0 r9 : 813146b0 r8 : 00006c00 r7 : ffff93ff r6 : 00006c00 r5 : 00000000 r4 : 00000000 r3 : 00000000 r2 : b3d48012 r1 : fffffef0 r0 : df000000 Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 85bbcac0 DAC: fffffffd Register r0 information: non-paged memory Register r1 information: non-paged memory Register r2 information: non-slab/vmalloc memory Register r3 information: NULL pointer Register r4 information: NULL pointer Register r5 information: NULL pointer Register r6 information: non-paged memory Register r7 information: non-paged memory Register r8 information: non-paged memory Register r9 information: non-slab/vmalloc memory Register r10 information: non-slab/vmalloc memory Register r11 information: 2-page vmalloc region starting at 0xeb40c000 allocated at kernel_clone+0x9c/0x3dc kernel/fork.c:2915 Register r12 information: non-slab/vmalloc memory Process syz-executor.0 (pid: 5515, stack limit = 0xeb40c000) Stack: (0xeb40db38 to 0xeb40e000) db20: 84ee0780 84012110 db40: 84012110 8150d5c4 eb40db74 eb40db58 84ee0300 84ee0780 81fdf65c 827e238f db60: 85811000 000004c0 eb40dc1c 84ee0300 00006869 00000000 00000000 00000000 db80: 00000000 85b54000 eb40dbd4 eb40db98 815f7a30 8150d3ec 00000001 05200000 dba0: 00c00000 b4ecb331 85c51c60 84ee0300 0000000e 00000000 00006869 00000000 dbc0: 00000000 85b54000 eb40dc1c eb40dbd8 816313f0 815f7974 80277e40 802a6108 dbe0: 00000060 00000052 8350af00 b4ecb331 20001000 84ee0300 00000000 00006869 dc00: 0000dd86 81631960 eb40dcf7 00000058 eb40dc3c eb40dc20 816319a4 816312d4 dc20: 84ee0300 00000000 00006869 0000dd86 eb40dc6c eb40dc40 813785a4 8163196c dc40: 0000000e b4ecb331 eb40dcf7 84ee0300 00006869 00000001 00000000 84579000 dc60: eb40dc8c eb40dc70 8133371c 813784ec 84ee0300 00006869 00000000 eb40dcf7 dc80: eb40dcc4 eb40dc90 8133b128 81333668 00000001 ffff0000 ffffdd86 00000000 dca0: 00000000 84b7a600 84579000 00000000 eb40dcf7 00000058 eb40dcec eb40dcc8 dcc0: 8133b340 8133af98 845bb000 84ee0300 84b7a600 84579000 00000000 00000001 dce0: eb40dd24 eb40dcf0 813aac28 8133b30c 845bb000 00579000 00000010 b4ecb331 dd00: 84ee0300 845bb000 00000000 00000001 a3ea3690 845bb0c4 eb40dd84 eb40dd28 dd20: 8133bf20 813aaa74 00000000 00000001 00000011 8260ee30 0040dda4 fffffff4 dd40: 00000000 8132cb8c 00000000 0000dd86 00000000 b4ecb331 00000000 84ee0300 dd60: 00002378 84579000 0000000a 84ee0300 85811000 85b57f00 eb40dda4 eb40dd88 dd80: 816350ec 8133b9c4 85811000 00002378 84579000 0000000a eb40de5c eb40dda8 dda0: 81638840 8163505c eb40de08 00000000 817fa874 80277f20 eb40ddec eb40ddc8 ddc0: eb40dea8 83206208 00002001 817fb15c 80200288 806b8594 eb40de1c eb40dde8 dde0: 81a02a70 00000000 00000002 0000236e 00000060 00000300 00000000 0000000e de00: 00000000 0000000a 00000000 236e0500 07440064 0000030c 00000000 00000000 de20: 00000000 00000000 8216d67c b4ecb331 eb40de5c 00000000 eb40de98 851bec80 de40: 04000002 80200288 8350af00 00000122 eb40de7c eb40de60 8130db78 81637984 de60: 00000000 851bec80 00000000 04000002 eb40df8c eb40de80 8130f9cc 8130db40 de80: eb40dea8 8350c890 fffffff7 00000001 8350c680 00000000 00000000 00000000 dea0: eb40ded4 eb40deb0 01000006 00000001 00002378 20000080 00000000 00000000 dec0: 00000001 00000000 00000000 00000000 04000002 00000000 00000000 00000000 dee0: 00000000 ffffffff 00000000 00000000 00000001 b4ecb331 00000005 00000000 df00: 00000080 0014c288 00000000 00000000 8350af00 000000f0 eb40df4c eb40df28 df20: 80309a98 8030d218 ffffffff 80200288 851bec80 8163ad30 851bec80 00000000 df40: eb40dfa4 eb40df50 8030a05c 803099f4 eb40df84 eb40df60 80277e40 802a6108 df60: 00000000 00000000 8350af00 b4ecb331 00000000 000002ff 0014c2c4 00000122 df80: eb40dfa4 eb40df90 8130fa34 8130f908 00000000 000002ff 00000000 eb40dfa8 dfa0: 80200060 8130fa24 00000000 000002ff 00000003 20000080 00002378 04000002 dfc0: 00000000 000002ff 0014c2c4 00000122 7ed473c2 76b0e6d0 7ed47534 76b0e20c dfe0: 76b0e020 76b0e010 00017004 0004dfb0 60000010 00000003 00000000 00000000 Backtrace: [<8150d3e0>] (__udp_gso_segment) from [<815f7a30>] (udp6_ufo_fragment+0xc8/0x39c net/ipv6/udp_offload.c:47) r10:85b54000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:00006869 r4:84ee0300 [<815f7968>] (udp6_ufo_fragment) from [<816313f0>] (ipv6_gso_segment.part.0+0x128/0x42c net/ipv6/ip6_offload.c:119) r10:85b54000 r9:00000000 r8:00000000 r7:00006869 r6:00000000 r5:0000000e r4:84ee0300 [<816312c8>] (ipv6_gso_segment.part.0) from [<816319a4>] (ipv6_gso_segment+0x44/0x48 net/ipv6/ip6_offload.c:91) r10:00000058 r9:eb40dcf7 r8:81631960 r7:0000dd86 r6:00006869 r5:00000000 r4:84ee0300 [<81631960>] (ipv6_gso_segment) from [<813785a4>] (skb_mac_gso_segment+0xc4/0x1a4 net/core/gro.c:141) r7:0000dd86 r6:00006869 r5:00000000 r4:84ee0300 [<813784e0>] (skb_mac_gso_segment) from [<8133371c>] (__skb_gso_segment+0xc0/0x16c net/core/dev.c:3401) r8:84579000 r7:00000000 r6:00000001 r5:00006869 r4:84ee0300 [<8133365c>] (__skb_gso_segment) from [<8133b128>] (skb_gso_segment include/linux/netdevice.h:4859 [inline]) [<8133365c>] (__skb_gso_segment) from [<8133b128>] (validate_xmit_skb+0x19c/0x374 net/core/dev.c:3659) r7:eb40dcf7 r6:00000000 r5:00006869 r4:84ee0300 [<8133af8c>] (validate_xmit_skb) from [<8133b340>] (validate_xmit_skb_list+0x40/0x74 net/core/dev.c:3709) r10:00000058 r9:eb40dcf7 r8:00000000 r7:84579000 r6:84b7a600 r5:00000000 r4:00000000 [<8133b300>] (validate_xmit_skb_list) from [<813aac28>] (sch_direct_xmit+0x1c0/0x45c net/sched/sch_generic.c:327) r9:00000001 r8:00000000 r7:84579000 r6:84b7a600 r5:84ee0300 r4:845bb000 [<813aaa68>] (sch_direct_xmit) from [<8133bf20>] (__dev_xmit_skb net/core/dev.c:3805 [inline]) [<813aaa68>] (sch_direct_xmit) from [<8133bf20>] (__dev_queue_xmit+0x568/0xdc8 net/core/dev.c:4210) r9:845bb0c4 r8:a3ea3690 r7:00000001 r6:00000000 r5:845bb000 r4:84ee0300 [<8133b9b8>] (__dev_queue_xmit) from [<816350ec>] (dev_queue_xmit include/linux/netdevice.h:3085 [inline]) [<8133b9b8>] (__dev_queue_xmit) from [<816350ec>] (packet_xmit net/packet/af_packet.c:276 [inline]) [<8133b9b8>] (__dev_queue_xmit) from [<816350ec>] (packet_xmit+0x9c/0x100 net/packet/af_packet.c:273) r10:85b57f00 r9:85811000 r8:84ee0300 r7:0000000a r6:84579000 r5:00002378 r4:84ee0300 [<81635050>] (packet_xmit) from [<81638840>] (packet_snd net/packet/af_packet.c:3081 [inline]) [<81635050>] (packet_xmit) from [<81638840>] (packet_sendmsg+0xec8/0x1448 net/packet/af_packet.c:3113) r7:0000000a r6:84579000 r5:00002378 r4:85811000 [<81637978>] (packet_sendmsg) from [<8130db78>] (sock_sendmsg_nosec net/socket.c:724 [inline]) [<81637978>] (packet_sendmsg) from [<8130db78>] (sock_sendmsg+0x44/0x78 net/socket.c:747) r10:00000122 r9:8350af00 r8:80200288 r7:04000002 r6:851bec80 r5:eb40de98 r4:00000000 [<8130db34>] (sock_sendmsg) from [<8130f9cc>] (__sys_sendto+0xd0/0x11c net/socket.c:2144) r7:04000002 r6:00000000 r5:851bec80 r4:00000000 [<8130f8fc>] (__sys_sendto) from [<8130fa34>] (__do_sys_sendto net/socket.c:2156 [inline]) [<8130f8fc>] (__sys_sendto) from [<8130fa34>] (sys_sendto+0x1c/0x24 net/socket.c:2152) r7:00000122 r6:0014c2c4 r5:000002ff r4:00000000 [<8130fa18>] (sys_sendto) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66) Exception stack(0xeb40dfa8 to 0xeb40dff0) dfa0: 00000000 000002ff 00000003 20000080 00002378 04000002 dfc0: 00000000 000002ff 0014c2c4 00000122 7ed473c2 76b0e6d0 7ed47534 76b0e20c dfe0: 76b0e020 76b0e010 00017004 0004dfb0 Code: e0b22003 e0b22004 e0b22005 e0b2200e (e8b04038) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: e0b22003 adcs r2, r2, r3 4: e0b22004 adcs r2, r2, r4 8: e0b22005 adcs r2, r2, r5 c: e0b2200e adcs r2, r2, lr * 10: e8b04038 ldm r0!, {r3, r4, r5, lr} <-- trapping instruction