================================================================== 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 l2cap_sock_setsockopt+0x2182/0x2930 net/bluetooth/l2cap_sock.c:1027 Read of size 4 at addr ffff88805e42e403 by task syz-executor.1/8633 CPU: 1 PID: 8633 Comm: syz-executor.1 Not tainted 6.9.0-rc2-next-20240405-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 copy_from_sockptr_offset include/linux/sockptr.h:49 [inline] copy_from_sockptr include/linux/sockptr.h:55 [inline] l2cap_sock_setsockopt+0x2182/0x2930 net/bluetooth/l2cap_sock.c:1027 do_sock_setsockopt+0x3af/0x720 net/socket.c:2311 __sys_setsockopt+0x1ae/0x250 net/socket.c:2334 __do_sys_setsockopt net/socket.c:2343 [inline] __se_sys_setsockopt net/socket.c:2340 [inline] __x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2340 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x72/0x7a RIP: 0033:0x7fac4f47de69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fac501950c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fac4f5abf80 RCX: 00007fac4f47de69 RDX: 000000000000000a RSI: 0000000000000112 RDI: 0000000000000007 RBP: 00007fac4f4ca47a R08: 0000000000000002 R09: 0000000000000000 R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fac4f5abf80 R15: 00007fff0422e288 Allocated by task 8633: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4078 [inline] __kmalloc_noprof+0x200/0x400 mm/slub.c:4091 kmalloc_noprof include/linux/slab.h:664 [inline] __cgroup_bpf_run_filter_setsockopt+0xd47/0x1050 kernel/bpf/cgroup.c:1869 do_sock_setsockopt+0x6b4/0x720 net/socket.c:2293 __sys_setsockopt+0x1ae/0x250 net/socket.c:2334 __do_sys_setsockopt net/socket.c:2343 [inline] __se_sys_setsockopt net/socket.c:2340 [inline] __x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2340 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x72/0x7a The buggy address belongs to the object at ffff88805e42e400 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 1 bytes to the right of allocated 2-byte region [ffff88805e42e400, ffff88805e42e402) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5e42e flags: 0xfff80000000000(node=0|zone=1|lastcpupid=0xfff) page_type: 0xffffefff(slab) raw: 00fff80000000000 ffff888015041280 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080800080 00000001ffffefff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 8627, tgid 24850320 (syz-executor.1), ts 8629, free_ts 182302757926 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1490 prep_new_page mm/page_alloc.c:1498 [inline] get_page_from_freelist+0x2e7e/0x2f40 mm/page_alloc.c:3454 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4712 __alloc_pages_node_noprof include/linux/gfp.h:244 [inline] alloc_pages_node_noprof include/linux/gfp.h:271 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2259 allocate_slab+0x5a/0x2e0 mm/slub.c:2422 new_slab mm/slub.c:2475 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3624 __slab_alloc+0x58/0xa0 mm/slub.c:3714 __slab_alloc_node mm/slub.c:3767 [inline] slab_alloc_node mm/slub.c:3945 [inline] __do_kmalloc_node mm/slub.c:4077 [inline] __kmalloc_node_noprof+0x28b/0x440 mm/slub.c:4085 kmalloc_node_noprof include/linux/slab.h:681 [inline] __vmalloc_area_node mm/vmalloc.c:3622 [inline] __vmalloc_node_range_noprof+0x5f9/0x1490 mm/vmalloc.c:3817 __vmalloc_node_noprof mm/vmalloc.c:3882 [inline] vzalloc_noprof+0x79/0x90 mm/vmalloc.c:3955 bpf_check+0x253/0x18620 kernel/bpf/verifier.c:21283 bpf_prog_load+0x1667/0x20f0 kernel/bpf/syscall.c:2895 __sys_bpf+0x4ee/0x810 kernel/bpf/syscall.c:5660 __do_sys_bpf kernel/bpf/syscall.c:5767 [inline] __se_sys_bpf kernel/bpf/syscall.c:5765 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5765 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x72/0x7a page last free pid 8409 tgid 8409 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1110 [inline] free_unref_page+0xd3c/0xec0 mm/page_alloc.c:2617 vfree+0x186/0x2e0 mm/vmalloc.c:3339 vb2_vmalloc_put+0x68/0xb0 drivers/media/common/videobuf2/videobuf2-vmalloc.c:68 __vb2_buf_mem_free+0xfa/0x2a0 drivers/media/common/videobuf2/videobuf2-core.c:276 __vb2_free_mem drivers/media/common/videobuf2/videobuf2-core.c:536 [inline] __vb2_queue_free+0x464/0xe10 drivers/media/common/videobuf2/videobuf2-core.c:566 vb2_core_queue_release+0x63/0xc0 drivers/media/common/videobuf2/videobuf2-core.c:2555 vb2_queue_release drivers/media/common/videobuf2/videobuf2-v4l2.c:953 [inline] _vb2_fop_release drivers/media/common/videobuf2/videobuf2-v4l2.c:1137 [inline] vb2_fop_release+0x171/0x200 drivers/media/common/videobuf2/videobuf2-v4l2.c:1151 v4l2_release+0x1f8/0x3b0 drivers/media/v4l2-core/v4l2-dev.c:456 __fput+0x406/0x8b0 fs/file_table.c:422 __do_sys_close fs/open.c:1556 [inline] __se_sys_close fs/open.c:1541 [inline] __x64_sys_close+0x7f/0x110 fs/open.c:1541 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x72/0x7a Memory state around the buggy address: ffff88805e42e300: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc ffff88805e42e380: fa fc fc fc 00 fc fc fc fa fc fc fc fa fc fc fc >ffff88805e42e400: 02 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88805e42e480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88805e42e500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================