================================================================== BUG: KASAN: slab-out-of-bounds in copy_from_sockptr_offset include/linux/sockptr.h:49 [inline] BUG: KASAN: slab-out-of-bounds in copy_from_sockptr include/linux/sockptr.h:55 [inline] BUG: KASAN: slab-out-of-bounds in do_replace net/ipv4/netfilter/ip_tables.c:1111 [inline] BUG: KASAN: slab-out-of-bounds in do_ipt_set_ctl+0x2b4/0x2f90 net/ipv4/netfilter/ip_tables.c:1627 Read of size 96 at addr ffff0000cb8b5d00 by task syz-executor.0/7898 CPU: 1 PID: 7898 Comm: syz-executor.0 Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:291 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:298 __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:377 [inline] print_report+0x178/0x518 mm/kasan/report.c:488 kasan_report+0xd8/0x138 mm/kasan/report.c:601 kasan_check_range+0x254/0x294 mm/kasan/generic.c:189 __asan_memcpy+0x3c/0x84 mm/kasan/shadow.c:105 copy_from_sockptr_offset include/linux/sockptr.h:49 [inline] copy_from_sockptr include/linux/sockptr.h:55 [inline] do_replace net/ipv4/netfilter/ip_tables.c:1111 [inline] do_ipt_set_ctl+0x2b4/0x2f90 net/ipv4/netfilter/ip_tables.c:1627 nf_setsockopt+0x270/0x290 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x118/0x128 net/ipv4/ip_sockglue.c:1420 raw_setsockopt+0x100/0x294 net/ipv4/raw.c:834 sock_common_setsockopt+0xb0/0xcc net/core/sock.c:3715 do_sock_setsockopt+0x2a0/0x4e0 net/socket.c:2311 __sys_setsockopt+0x128/0x1a8 net/socket.c:2334 __do_sys_setsockopt net/socket.c:2343 [inline] __se_sys_setsockopt net/socket.c:2340 [inline] __arm64_sys_setsockopt+0xb8/0xd4 net/socket.c:2340 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Allocated by task 7898: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:575 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:3981 [inline] __kmalloc+0x2bc/0x5d4 mm/slub.c:3994 kmalloc include/linux/slab.h:594 [inline] kzalloc include/linux/slab.h:711 [inline] sockopt_alloc_buf kernel/bpf/cgroup.c:1779 [inline] __cgroup_bpf_run_filter_setsockopt+0x240/0xd1c kernel/bpf/cgroup.c:1820 do_sock_setsockopt+0x498/0x4e0 net/socket.c:2293 __sys_setsockopt+0x128/0x1a8 net/socket.c:2334 __do_sys_setsockopt net/socket.c:2343 [inline] __se_sys_setsockopt net/socket.c:2340 [inline] __arm64_sys_setsockopt+0xb8/0xd4 net/socket.c:2340 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 The buggy address belongs to the object at ffff0000cb8b5d00 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes inside of allocated 85-byte region [ffff0000cb8b5d00, ffff0000cb8b5d55) The buggy address belongs to the physical page: page:000000002124e3e7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10b8b5 flags: 0x5ffc00000000800(slab|node=0|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 05ffc00000000800 ffff0000c0001780 fffffdffc32262c0 dead000000000002 raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000cb8b5c00: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ffff0000cb8b5c80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff0000cb8b5d00: 00 00 00 00 00 00 00 00 00 00 05 fc fc fc fc fc ^ ffff0000cb8b5d80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff0000cb8b5e00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ================================================================== loop0: detected capacity change from 0 to 32768 BTRFS: device fsid 395ef67a-297e-477c-816d-cd80a5b93e5d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (7898) BTRFS info (device loop0): first mount of filesystem 395ef67a-297e-477c-816d-cd80a5b93e5d BTRFS info (device loop0): using sha256 (sha256-ce) checksum algorithm BTRFS info (device loop0): using free-space-tree