F2FS-fs (loop2): Invalid Fs Meta Ino: node(0) meta(0) root(3) F2FS-fs (loop2): Can't find valid F2FS filesystem in 2th superblock attempt to access beyond end of device ================================================================== loop5: rw=12288, want=12296, limit=20 BUG: KASAN: slab-out-of-bounds in _decode_session6+0x134a/0x1500 net/ipv6/xfrm6_policy.c:161 Read of size 1 at addr ffff8801b79c0547 by task syz-executor3/16846 CPU: 0 PID: 16846 Comm: syz-executor3 Not tainted 4.19.0+ #94 F2FS-fs (loop5): Failed to get valid F2FS checkpoint Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 print_address_description.cold.7+0x9/0x1ff mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.8+0x242/0x309 mm/kasan/report.c:412 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:430 _decode_session6+0x134a/0x1500 net/ipv6/xfrm6_policy.c:161 __xfrm_decode_session+0x71/0x140 net/xfrm/xfrm_policy.c:2299 xfrm_decode_session include/net/xfrm.h:1232 [inline] vti_tunnel_xmit+0x1b1/0x1730 net/ipv4/ip_vti.c:252 F2FS-fs (loop1): Magic Mismatch, valid(0xf2f52010) - read(0x0) __netdev_start_xmit include/linux/netdevice.h:4336 [inline] netdev_start_xmit include/linux/netdevice.h:4345 [inline] xmit_one net/core/dev.c:3252 [inline] dev_hard_start_xmit+0x295/0xc90 net/core/dev.c:3268 F2FS-fs (loop1): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop1): Invalid Fs Meta Ino: node(0) meta(0) root(3) __dev_queue_xmit+0x2f71/0x3ad0 net/core/dev.c:3838 F2FS-fs (loop1): Can't find valid F2FS filesystem in 2th superblock F2FS-fs (loop1): Magic Mismatch, valid(0xf2f52010) - read(0x0) F2FS-fs (loop1): Can't find valid F2FS filesystem in 1th superblock dev_queue_xmit+0x17/0x20 net/core/dev.c:3871 F2FS-fs (loop1): Invalid Fs Meta Ino: node(0) meta(0) root(3) __bpf_tx_skb net/core/filter.c:2017 [inline] __bpf_redirect_common net/core/filter.c:2055 [inline] __bpf_redirect+0x5cf/0xb20 net/core/filter.c:2062 ____bpf_clone_redirect net/core/filter.c:2095 [inline] bpf_clone_redirect+0x2f6/0x490 net/core/filter.c:2067 bpf_prog_c43b17cda12376d2+0xa39/0x1000 F2FS-fs (loop1): Can't find valid F2FS filesystem in 2th superblock Allocated by task 16846: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553 __do_kmalloc mm/slab.c:3722 [inline] __kmalloc+0x15b/0x760 mm/slab.c:3731 kmalloc include/linux/slab.h:551 [inline] kzalloc include/linux/slab.h:741 [inline] bpf_test_init.isra.10+0x98/0x100 net/bpf/test_run.c:100 bpf_prog_test_run_skb+0x109/0xcb0 net/bpf/test_run.c:124 bpf_prog_test_run+0x130/0x1a0 kernel/bpf/syscall.c:1870 __do_sys_bpf kernel/bpf/syscall.c:2507 [inline] __se_sys_bpf kernel/bpf/syscall.c:2451 [inline] __x64_sys_bpf+0x3d8/0x520 kernel/bpf/syscall.c:2451 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 15937: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xcf/0x230 mm/slab.c:3817 skb_free_head+0x99/0xc0 net/core/skbuff.c:550 skb_release_data+0x6a4/0x880 net/core/skbuff.c:570 skb_release_all+0x4a/0x60 net/core/skbuff.c:627 __kfree_skb net/core/skbuff.c:641 [inline] kfree_skb+0x1bb/0x580 net/core/skbuff.c:659 vti_xmit net/ipv4/ip_vti.c:232 [inline] vti_tunnel_xmit+0xc16/0x1730 net/ipv4/ip_vti.c:264 __netdev_start_xmit include/linux/netdevice.h:4336 [inline] netdev_start_xmit include/linux/netdevice.h:4345 [inline] xmit_one net/core/dev.c:3252 [inline] dev_hard_start_xmit+0x295/0xc90 net/core/dev.c:3268 __dev_queue_xmit+0x2f71/0x3ad0 net/core/dev.c:3838 dev_queue_xmit+0x17/0x20 net/core/dev.c:3871 __bpf_tx_skb net/core/filter.c:2017 [inline] __bpf_redirect_common net/core/filter.c:2055 [inline] __bpf_redirect+0x5cf/0xb20 net/core/filter.c:2062 ____bpf_clone_redirect net/core/filter.c:2095 [inline] bpf_clone_redirect+0x2f6/0x490 net/core/filter.c:2067 bpf_prog_c43b17cda12376d2+0xcb6/0x1000 The buggy address belongs to the object at ffff8801b79c0340 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 7 bytes to the right of 512-byte region [ffff8801b79c0340, ffff8801b79c0540) The buggy address belongs to the page: page:ffffea0006de7000 count:1 mapcount:0 mapping:ffff8801da800940 index:0x0 flags: 0x2fffc0000000200(slab) raw: 02fffc0000000200 ffffea000755fec8 ffffea0006246488 ffff8801da800940 raw: 0000000000000000 ffff8801b79c00c0 0000000100000006 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801b79c0400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801b79c0480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801b79c0500: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff8801b79c0580: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff8801b79c0600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================