================================================================== BUG: KASAN: slab-out-of-bounds in do_csum+0x44/0x254 arch/arm64/lib/csum.c:39 Read of size 4294967236 at addr ffff000127d1c03c by task syz-executor.1/9820 CPU: 0 PID: 9820 Comm: syz-executor.1 Not tainted 6.3.0-rc1-syzkaller-gfe15c26ee26e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:319 [inline] print_report+0x174/0x514 mm/kasan/report.c:430 kasan_report+0xd4/0x130 mm/kasan/report.c:536 kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:187 __kasan_check_read+0x2c/0x3c mm/kasan/shadow.c:31 do_csum+0x44/0x254 arch/arm64/lib/csum.c:39 csum_partial+0x30/0x58 lib/checksum.c:128 gso_make_checksum include/linux/skbuff.h:4901 [inline] __udp_gso_segment+0xaf4/0x1bcc net/ipv4/udp_offload.c:332 udp4_ufo_fragment+0x3f8/0x6d4 net/ipv4/udp_offload.c:392 inet_gso_segment+0x4e4/0x1114 net/ipv4/af_inet.c:1396 skb_mac_gso_segment+0x2b4/0x5b0 net/core/gro.c:141 __skb_gso_segment+0x254/0x3d8 net/core/dev.c:3403 skb_gso_segment include/linux/netdevice.h:4825 [inline] validate_xmit_skb+0x364/0xd38 net/core/dev.c:3661 __dev_queue_xmit+0x1344/0x3734 net/core/dev.c:4238 dev_queue_xmit include/linux/netdevice.h:3051 [inline] br_dev_queue_push_xmit+0x530/0x658 net/bridge/br_forward.c:53 NF_HOOK+0x35c/0x408 include/linux/netfilter.h:302 br_forward_finish+0xd0/0x118 net/bridge/br_forward.c:66 NF_HOOK+0x35c/0x408 include/linux/netfilter.h:302 __br_forward+0x2ec/0x454 net/bridge/br_forward.c:115 deliver_clone net/bridge/br_forward.c:131 [inline] maybe_deliver+0xc8/0x160 net/bridge/br_forward.c:189 br_flood+0x28c/0x3e0 net/bridge/br_forward.c:231 br_dev_xmit+0xe4c/0x1444 __netdev_start_xmit include/linux/netdevice.h:4881 [inline] netdev_start_xmit include/linux/netdevice.h:4895 [inline] xmit_one net/core/dev.c:3580 [inline] dev_hard_start_xmit+0x344/0xcd4 net/core/dev.c:3596 __dev_queue_xmit+0x18cc/0x3734 net/core/dev.c:4246 dev_queue_xmit+0x24/0x34 include/linux/netdevice.h:3051 packet_snd net/packet/af_packet.c:3073 [inline] packet_sendmsg+0x3604/0x4c54 net/packet/af_packet.c:3104 sock_sendmsg_nosec net/socket.c:722 [inline] sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x3b4/0x538 net/socket.c:2145 __do_sys_sendto net/socket.c:2157 [inline] __se_sys_sendto net/socket.c:2153 [inline] __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2153 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Allocated by task 9820: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:510 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc_node_track_caller+0xd0/0x1c0 mm/slab_common.c:987 kmalloc_reserve+0x148/0x23c net/core/skbuff.c:539 __alloc_skb+0x1c8/0x3d8 net/core/skbuff.c:608 skb_segment+0xa80/0x3324 net/core/skbuff.c:4440 __udp_gso_segment+0x5d0/0x1bcc net/ipv4/udp_offload.c:290 udp4_ufo_fragment+0x3f8/0x6d4 net/ipv4/udp_offload.c:392 inet_gso_segment+0x4e4/0x1114 net/ipv4/af_inet.c:1396 skb_mac_gso_segment+0x2b4/0x5b0 net/core/gro.c:141 __skb_gso_segment+0x254/0x3d8 net/core/dev.c:3403 skb_gso_segment include/linux/netdevice.h:4825 [inline] validate_xmit_skb+0x364/0xd38 net/core/dev.c:3661 __dev_queue_xmit+0x1344/0x3734 net/core/dev.c:4238 dev_queue_xmit include/linux/netdevice.h:3051 [inline] br_dev_queue_push_xmit+0x530/0x658 net/bridge/br_forward.c:53 NF_HOOK+0x35c/0x408 include/linux/netfilter.h:302 br_forward_finish+0xd0/0x118 net/bridge/br_forward.c:66 NF_HOOK+0x35c/0x408 include/linux/netfilter.h:302 __br_forward+0x2ec/0x454 net/bridge/br_forward.c:115 deliver_clone net/bridge/br_forward.c:131 [inline] maybe_deliver+0xc8/0x160 net/bridge/br_forward.c:189 br_flood+0x28c/0x3e0 net/bridge/br_forward.c:231 br_dev_xmit+0xe4c/0x1444 __netdev_start_xmit include/linux/netdevice.h:4881 [inline] netdev_start_xmit include/linux/netdevice.h:4895 [inline] xmit_one net/core/dev.c:3580 [inline] dev_hard_start_xmit+0x344/0xcd4 net/core/dev.c:3596 __dev_queue_xmit+0x18cc/0x3734 net/core/dev.c:4246 dev_queue_xmit+0x24/0x34 include/linux/netdevice.h:3051 packet_snd net/packet/af_packet.c:3073 [inline] packet_sendmsg+0x3604/0x4c54 net/packet/af_packet.c:3104 sock_sendmsg_nosec net/socket.c:722 [inline] sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x3b4/0x538 net/socket.c:2145 __do_sys_sendto net/socket.c:2157 [inline] __se_sys_sendto net/socket.c:2153 [inline] __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2153 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 The buggy address belongs to the object at ffff000127d1c000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 60 bytes inside of allocated 8192-byte region [ffff000127d1c000, ffff000127d1e000) The buggy address belongs to the physical page: page:00000000a6c0c695 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167d18 head:00000000a6c0c695 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 ffff0000c0002c00 0000000000000000 0000000000000001 raw: 0000000000000000 0000000080020002 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff000127d1df00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff000127d1df80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff000127d1e000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff000127d1e080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff000127d1e100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== ================================================================================ UBSAN: shift-out-of-bounds in arch/arm64/lib/csum.c:116:15 shift exponent 512 is too large for 64-bit type 'u64' (aka 'unsigned long long') CPU: 0 PID: 9820 Comm: syz-executor.1 Tainted: G B 6.3.0-rc1-syzkaller-gfe15c26ee26e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 ubsan_epilogue lib/ubsan.c:217 [inline] __ubsan_handle_shift_out_of_bounds+0x2f4/0x36c lib/ubsan.c:387 do_csum+0x238/0x254 arch/arm64/lib/csum.c:116 csum_partial+0x30/0x58 lib/checksum.c:128 gso_make_checksum include/linux/skbuff.h:4901 [inline] __udp_gso_segment+0xaf4/0x1bcc net/ipv4/udp_offload.c:332 udp4_ufo_fragment+0x3f8/0x6d4 net/ipv4/udp_offload.c:392 inet_gso_segment+0x4e4/0x1114 net/ipv4/af_inet.c:1396 skb_mac_gso_segment+0x2b4/0x5b0 net/core/gro.c:141 __skb_gso_segment+0x254/0x3d8 net/core/dev.c:3403 skb_gso_segment include/linux/netdevice.h:4825 [inline] validate_xmit_skb+0x364/0xd38 net/core/dev.c:3661 __dev_queue_xmit+0x1344/0x3734 net/core/dev.c:4238 dev_queue_xmit include/linux/netdevice.h:3051 [inline] br_dev_queue_push_xmit+0x530/0x658 net/bridge/br_forward.c:53 NF_HOOK+0x35c/0x408 include/linux/netfilter.h:302 br_forward_finish+0xd0/0x118 net/bridge/br_forward.c:66 NF_HOOK+0x35c/0x408 include/linux/netfilter.h:302 __br_forward+0x2ec/0x454 net/bridge/br_forward.c:115 deliver_clone net/bridge/br_forward.c:131 [inline] maybe_deliver+0xc8/0x160 net/bridge/br_forward.c:189 br_flood+0x28c/0x3e0 net/bridge/br_forward.c:231 br_dev_xmit+0xe4c/0x1444 __netdev_start_xmit include/linux/netdevice.h:4881 [inline] netdev_start_xmit include/linux/netdevice.h:4895 [inline] xmit_one net/core/dev.c:3580 [inline] dev_hard_start_xmit+0x344/0xcd4 net/core/dev.c:3596 __dev_queue_xmit+0x18cc/0x3734 net/core/dev.c:4246 dev_queue_xmit+0x24/0x34 include/linux/netdevice.h:3051 packet_snd net/packet/af_packet.c:3073 [inline] packet_sendmsg+0x3604/0x4c54 net/packet/af_packet.c:3104 sock_sendmsg_nosec net/socket.c:722 [inline] sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x3b4/0x538 net/socket.c:2145 __do_sys_sendto net/socket.c:2157 [inline] __se_sys_sendto net/socket.c:2153 [inline] __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2153 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 ================================================================================ ================================================================================ UBSAN: shift-out-of-bounds in arch/arm64/lib/csum.c:116:25 shift exponent 512 is too large for 64-bit type 'u64' (aka 'unsigned long long') CPU: 0 PID: 9820 Comm: syz-executor.1 Tainted: G B 6.3.0-rc1-syzkaller-gfe15c26ee26e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 ubsan_epilogue lib/ubsan.c:217 [inline] __ubsan_handle_shift_out_of_bounds+0x2f4/0x36c lib/ubsan.c:387 do_csum+0x250/0x254 arch/arm64/lib/csum.c:116 csum_partial+0x30/0x58 lib/checksum.c:128 gso_make_checksum include/linux/skbuff.h:4901 [inline] __udp_gso_segment+0xaf4/0x1bcc net/ipv4/udp_offload.c:332 udp4_ufo_fragment+0x3f8/0x6d4 net/ipv4/udp_offload.c:392 inet_gso_segment+0x4e4/0x1114 net/ipv4/af_inet.c:1396 skb_mac_gso_segment+0x2b4/0x5b0 net/core/gro.c:141 __skb_gso_segment+0x254/0x3d8 net/core/dev.c:3403 skb_gso_segment include/linux/netdevice.h:4825 [inline] validate_xmit_skb+0x364/0xd38 net/core/dev.c:3661 __dev_queue_xmit+0x1344/0x3734 net/core/dev.c:4238 dev_queue_xmit include/linux/netdevice.h:3051 [inline] br_dev_queue_push_xmit+0x530/0x658 net/bridge/br_forward.c:53 NF_HOOK+0x35c/0x408 include/linux/netfilter.h:302 br_forward_finish+0xd0/0x118 net/bridge/br_forward.c:66 NF_HOOK+0x35c/0x408 include/linux/netfilter.h:302 __br_forward+0x2ec/0x454 net/bridge/br_forward.c:115 deliver_clone net/bridge/br_forward.c:131 [inline] maybe_deliver+0xc8/0x160 net/bridge/br_forward.c:189 br_flood+0x28c/0x3e0 net/bridge/br_forward.c:231 br_dev_xmit+0xe4c/0x1444 __netdev_start_xmit include/linux/netdevice.h:4881 [inline] netdev_start_xmit include/linux/netdevice.h:4895 [inline] xmit_one net/core/dev.c:3580 [inline] dev_hard_start_xmit+0x344/0xcd4 net/core/dev.c:3596 __dev_queue_xmit+0x18cc/0x3734 net/core/dev.c:4246 dev_queue_xmit+0x24/0x34 include/linux/netdevice.h:3051 packet_snd net/packet/af_packet.c:3073 [inline] packet_sendmsg+0x3604/0x4c54 net/packet/af_packet.c:3104 sock_sendmsg_nosec net/socket.c:722 [inline] sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x3b4/0x538 net/socket.c:2145 __do_sys_sendto net/socket.c:2157 [inline] __se_sys_sendto net/socket.c:2153 [inline] __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2153 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 ================================================================================