Hello, syzbot found the following issue on: HEAD commit: 8867bbd4a056 mm: arm64: Fix the out-of-bounds issue in con.. 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=143cc2f5980000 kernel config: https://syzkaller.appspot.com/x/.config?x=1bc88a9f65787e86 dashboard link: https://syzkaller.appspot.com/bug?extid=deb196d6d40f19e8551a compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/5ef30d34e749/disk-8867bbd4.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a21c2389ebfb/vmlinux-8867bbd4.xz kernel image: https://storage.googleapis.com/syzbot-assets/9720b12c3f99/Image-8867bbd4.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+deb196d6d40f19e8551a@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ WARNING: CPU: 0 PID: 13062 at include/linux/skbuff.h:2738 pskb_may_pull_reason include/linux/skbuff.h:2738 [inline] WARNING: CPU: 0 PID: 13062 at include/linux/skbuff.h:2738 pskb_may_pull include/linux/skbuff.h:2754 [inline] WARNING: CPU: 0 PID: 13062 at include/linux/skbuff.h:2738 skb_ensure_writable+0x26c/0x3a8 net/core/skbuff.c:6100 Modules linked in: CPU: 0 PID: 13062 Comm: syz.2.2595 Tainted: G W 6.10.0-rc2-syzkaller-g8867bbd4a056 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : pskb_may_pull_reason include/linux/skbuff.h:2738 [inline] pc : pskb_may_pull include/linux/skbuff.h:2754 [inline] pc : skb_ensure_writable+0x26c/0x3a8 net/core/skbuff.c:6100 lr : pskb_may_pull_reason include/linux/skbuff.h:2738 [inline] lr : pskb_may_pull include/linux/skbuff.h:2754 [inline] lr : skb_ensure_writable+0x26c/0x3a8 net/core/skbuff.c:6100 sp : ffff800098f076c0 x29: ffff800098f076c0 x28: 0000000001000000 x27: ffff800098f07768 x26: 0000000000000000 x25: ffff800098f07770 x24: 1ffff000136a9e06 x23: 1ffff000131e0f1c x22: dfff800000000000 x21: dfff800000000000 x20: 00000000ffffffff x19: ffff0000c61a8280 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80008055a9d4 x15: 0000000000000003 x14: ffff80008f3c0558 x13: dfff800000000000 x12: 0000000000000003 x11: 0000000000040000 x10: 00000000000004d0 x9 : ffff80009f01f000 x8 : 00000000000004d1 x7 : ffff80008044e140 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0000d24fdac0 x1 : 00000000ffffffff x0 : 0000000000000000 Call trace: pskb_may_pull_reason include/linux/skbuff.h:2738 [inline] pskb_may_pull include/linux/skbuff.h:2754 [inline] skb_ensure_writable+0x26c/0x3a8 net/core/skbuff.c:6100 __bpf_try_make_writable net/core/filter.c:1668 [inline] bpf_try_make_writable net/core/filter.c:1674 [inline] ____bpf_skb_pull_data net/core/filter.c:1865 [inline] bpf_skb_pull_data+0x80/0x210 net/core/filter.c:1854 bpf_prog_d22c10afa9a4a832+0x50/0xb8 bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline] __bpf_prog_run include/linux/filter.h:691 [inline] bpf_prog_run include/linux/filter.h:698 [inline] bpf_test_run+0x374/0x890 net/bpf/test_run.c:425 bpf_prog_test_run_skb+0x8d4/0x1090 net/bpf/test_run.c:1066 bpf_prog_test_run+0x2dc/0x364 kernel/bpf/syscall.c:4291 __sys_bpf+0x314/0x5f0 kernel/bpf/syscall.c:5705 __do_sys_bpf kernel/bpf/syscall.c:5794 [inline] __se_sys_bpf kernel/bpf/syscall.c:5792 [inline] __arm64_sys_bpf+0x80/0x98 kernel/bpf/syscall.c:5792 __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 irq event stamp: 291 hardirqs last enabled at (289): [<ffff80008044e060>] seqcount_lockdep_reader_access+0x80/0x104 include/linux/seqlock.h:74 hardirqs last disabled at (291): [<ffff80008b1fe010>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:470 softirqs last enabled at (276): [<ffff800080030830>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (290): [<ffff800089727270>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- --- This report is generated by a bot. 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