syzbot

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BUG: KFENCE: memory corruption in skb_kfree_head net/core/skbuff.c:1086 [inline]
BUG: KFENCE: memory corruption in skb_free_head net/core/skbuff.c:1098 [inline]
BUG: KFENCE: memory corruption in pskb_expand_head+0x4fc/0x1380 net/core/skbuff.c:2307

Corrupted memory at 0xffff88823bfaafc0 [ 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 ] (in kfence-#212):
 skb_kfree_head net/core/skbuff.c:1086 [inline]
 skb_free_head net/core/skbuff.c:1098 [inline]
 pskb_expand_head+0x4fc/0x1380 net/core/skbuff.c:2307
 __skb_cow include/linux/skbuff.h:3702 [inline]
 skb_cow include/linux/skbuff.h:3721 [inline]
 __bpf_skb_change_head+0x227/0x4a0 net/core/filter.c:3850
 ____bpf_skb_change_head net/core/filter.c:3873 [inline]
 bpf_skb_change_head+0x33/0x1b0 net/core/filter.c:3870
 bpf_prog_4a2cba36a3decec5+0x62/0x67
 bpf_dispatcher_nop_func include/linux/bpf.h:1257 [inline]
 __bpf_prog_run include/linux/filter.h:701 [inline]
 bpf_prog_run include/linux/filter.h:708 [inline]
 bpf_test_run+0x4f0/0xa90 net/bpf/test_run.c:433
 bpf_prog_test_run_skb+0xc97/0x1820 net/bpf/test_run.c:1094
 bpf_prog_test_run+0x2e4/0x360 kernel/bpf/syscall.c:4247
 __sys_bpf+0x48d/0x810 kernel/bpf/syscall.c:5652
 __do_sys_bpf kernel/bpf/syscall.c:5741 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5739 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5739
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

kfence-#212: 0xffff88823bfaae00-0xffff88823bfaafbf, size=448, cache=kmalloc-512

allocated by task 6184 on cpu 1 at 138.694694s (0.101653s ago):
 kmalloc_noprof include/linux/slab.h:882 [inline]
 kzalloc_noprof include/linux/slab.h:1014 [inline]
 bpf_test_init+0xe1/0x180 net/bpf/test_run.c:669
 bpf_prog_test_run_skb+0x2bb/0x1820 net/bpf/test_run.c:1000
 bpf_prog_test_run+0x2e4/0x360 kernel/bpf/syscall.c:4247
 __sys_bpf+0x48d/0x810 kernel/bpf/syscall.c:5652
 __do_sys_bpf kernel/bpf/syscall.c:5741 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5739 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5739
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

freed by task 6184 on cpu 1 at 138.694821s (0.145668s ago):
 skb_kfree_head net/core/skbuff.c:1086 [inline]
 skb_free_head net/core/skbuff.c:1098 [inline]
 pskb_expand_head+0x4fc/0x1380 net/core/skbuff.c:2307
 __skb_cow include/linux/skbuff.h:3702 [inline]
 skb_cow include/linux/skbuff.h:3721 [inline]
 __bpf_skb_change_head+0x227/0x4a0 net/core/filter.c:3850
 ____bpf_skb_change_head net/core/filter.c:3873 [inline]
 bpf_skb_change_head+0x33/0x1b0 net/core/filter.c:3870
 bpf_prog_4a2cba36a3decec5+0x62/0x67
 bpf_dispatcher_nop_func include/linux/bpf.h:1257 [inline]
 __bpf_prog_run include/linux/filter.h:701 [inline]
 bpf_prog_run include/linux/filter.h:708 [inline]
 bpf_test_run+0x4f0/0xa90 net/bpf/test_run.c:433
 bpf_prog_test_run_skb+0xc97/0x1820 net/bpf/test_run.c:1094
 bpf_prog_test_run+0x2e4/0x360 kernel/bpf/syscall.c:4247
 __sys_bpf+0x48d/0x810 kernel/bpf/syscall.c:5652
 __do_sys_bpf kernel/bpf/syscall.c:5741 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5739 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5739
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 1 UID: 0 PID: 6184 Comm: syz.1.195 Not tainted 6.12.0-rc1-next-20241003-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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