Hello, syzbot found the following issue on: HEAD commit: 707081b61156 Merge branch 'for-next/core', remote-tracking.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=14a081d3180000 kernel config: https://syzkaller.appspot.com/x/.config?x=caeac3f3565b057a dashboard link: https://syzkaller.appspot.com/bug?extid=8a1d152fba6b41f760ae compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16a2a955180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15c6098d180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6cad68bf7532/disk-707081b6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1a27e5400778/vmlinux-707081b6.xz kernel image: https://storage.googleapis.com/syzbot-assets/67dfc53755d0/Image-707081b6.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8a1d152fba6b41f760ae@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== 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+0x2070/0x2934 net/bluetooth/l2cap_sock.c:962 Read of size 4 at addr ffff0000cbfa73c3 by task syz-executor258/6168 CPU: 1 PID: 6168 Comm: syz-executor258 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 __asan_report_load_n_noabort+0x1c/0x28 mm/kasan/report_generic.c:391 copy_from_sockptr_offset include/linux/sockptr.h:49 [inline] copy_from_sockptr include/linux/sockptr.h:55 [inline] l2cap_sock_setsockopt+0x2070/0x2934 net/bluetooth/l2cap_sock.c:962 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 6168: 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] __cgroup_bpf_run_filter_setsockopt+0xa94/0xd1c kernel/bpf/cgroup.c:1872 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 ffff0000cbfa73c0 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 [ffff0000cbfa73c0, ffff0000cbfa73c2) The buggy address belongs to the physical page: page:00000000512b024c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10bfa7 anon flags: 0x5ffc00000000800(slab|node=0|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 05ffc00000000800 ffff0000c0001280 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080800080 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000cbfa7280: 05 fc fc fc 00 fc fc fc 00 fc fc fc 00 fc fc fc ffff0000cbfa7300: 05 fc fc fc 05 fc fc fc 05 fc fc fc fa fc fc fc >ffff0000cbfa7380: fa fc fc fc 00 fc fc fc 02 fc fc fc 05 fc fc fc ^ ffff0000cbfa7400: 00 fc fc fc 00 fc fc fc 00 fc fc fc 05 fc fc fc ffff0000cbfa7480: 05 fc fc fc 05 fc fc fc 05 fc fc fc fa fc fc fc ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
