================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {INITIAL USE} -> {IN-NMI} usage. syz.4.1099/7197 [HC1[1]:SC0[0]:HE0:SE1] takes: ffff8880603a3da0 (&htab->lockdep_key){....}-{2:2}, at: htab_lock_bucket kernel/bpf/hashtab.c:183 [inline] ffff8880603a3da0 (&htab->lockdep_key){....}-{2:2}, at: htab_map_delete_elem+0x1b2/0x520 kernel/bpf/hashtab.c:1361 {INITIAL USE} state was registered at: lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xb0/0x100 kernel/locking/spinlock.c:162 htab_lock_bucket kernel/bpf/hashtab.c:183 [inline] htab_map_delete_elem+0x1b2/0x520 kernel/bpf/hashtab.c:1361 bpf_prog_2c29ac5cdc6b1842+0x3a/0x60 bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline] __bpf_prog_run include/linux/filter.h:628 [inline] bpf_prog_run include/linux/filter.h:635 [inline] bpf_overflow_handler+0x1c2/0x4a0 kernel/events/core.c:10297 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9515 perf_bp_event+0x276/0x320 kernel/events/core.c:10484 hw_breakpoint_handler arch/x86/kernel/hw_breakpoint.c:555 [inline] hw_breakpoint_exceptions_notify+0x152/0x470 arch/x86/kernel/hw_breakpoint.c:586 notifier_call_chain kernel/notifier.c:83 [inline] atomic_notifier_call_chain+0x15d/0x280 kernel/notifier.c:198 notify_die+0x141/0x1a0 kernel/notifier.c:529 notify_debug+0x20/0x30 arch/x86/kernel/traps.c:872 exc_debug_user arch/x86/kernel/traps.c:998 [inline] noist_exc_debug+0x73/0x120 arch/x86/kernel/traps.c:1035 asm_exc_debug+0x2f/0x40 arch/x86/include/asm/idtentry.h:642 irq event stamp: 1302 hardirqs last enabled at (1301): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (1301): [] _raw_spin_unlock_irqrestore+0x82/0x120 kernel/locking/spinlock.c:194 hardirqs last disabled at (1302): [] exc_debug_kernel arch/x86/kernel/traps.c:893 [inline] hardirqs last disabled at (1302): [] exc_debug+0x6e/0x130 arch/x86/kernel/traps.c:1029 softirqs last enabled at (1278): [] lock_sock include/net/sock.h:1744 [inline] softirqs last enabled at (1278): [] rawv6_sendmsg+0x11d9/0x1700 net/ipv6/raw.c:953 softirqs last disabled at (1276): [] spin_lock_bh include/linux/spinlock.h:369 [inline] softirqs last disabled at (1276): [] lock_sock_nested+0x68/0x100 net/core/sock.c:3262 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&htab->lockdep_key); lock(&htab->lockdep_key); *** DEADLOCK *** 1 lock held by syz.4.1099/7197: #0: ffff88807b0ec9a0 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1744 [inline] #0: ffff88807b0ec9a0 (sk_lock-AF_INET6){+.+.}-{0:0}, at: rawv6_sendmsg+0x11d9/0x1700 net/ipv6/raw.c:953 stack backtrace: CPU: 1 PID: 7197 Comm: syz.4.1099 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: <#DB> dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 lock_acquire+0x2c3/0x400 kernel/locking/lockdep.c:5614 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xb0/0x100 kernel/locking/spinlock.c:162 htab_lock_bucket kernel/bpf/hashtab.c:183 [inline] htab_map_delete_elem+0x1b2/0x520 kernel/bpf/hashtab.c:1361 bpf_prog_2c29ac5cdc6b1842+0x3a/0x60 bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline] __bpf_prog_run include/linux/filter.h:628 [inline] bpf_prog_run include/linux/filter.h:635 [inline] bpf_overflow_handler+0x1c2/0x4a0 kernel/events/core.c:10297 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9515 perf_bp_event+0x276/0x320 kernel/events/core.c:10484 hw_breakpoint_handler arch/x86/kernel/hw_breakpoint.c:555 [inline] hw_breakpoint_exceptions_notify+0x152/0x470 arch/x86/kernel/hw_breakpoint.c:586 notifier_call_chain kernel/notifier.c:83 [inline] atomic_notifier_call_chain+0x15d/0x280 kernel/notifier.c:198 notify_die+0x141/0x1a0 kernel/notifier.c:529 notify_debug+0x20/0x30 arch/x86/kernel/traps.c:872 exc_debug_kernel arch/x86/kernel/traps.c:929 [inline] exc_debug+0xcf/0x130 arch/x86/kernel/traps.c:1029 asm_exc_debug+0x1a/0x40 arch/x86/include/asm/idtentry.h:642 RIP: 0010:csum_partial_copy_generic+0x6f/0x1e0 arch/x86/lib/csum-copy_64.S:93 Code: 0f 1f 84 00 00 00 00 00 0f 1f 00 48 8b 1f 4c 8b 47 08 4c 8b 5f 10 48 8b 57 18 4c 8b 57 20 4c 8b 7f 28 4c 8b 77 30 4c 8b 6f 38 <0f> 18 8f 40 01 00 00 48 11 d8 4c 11 c0 4c 11 d8 48 11 d0 4c 11 d0 RSP: 0018:ffffc900031af238 EFLAGS: 00040206 RAX: 00000003004ddfb4 RBX: 0000000000000000 RCX: 0000000000008000 RDX: 0000000000000000 RSI: ffff88807b148100 RDI: 00002000000002c8 RBP: 00002000000081c8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000000001fc R13: 00006370692f736e R14: 0000000000000000 R15: 0000000000000000 csum_and_copy_from_user+0xdf/0x120 arch/x86/lib/csum-wrappers_64.c:31 csum_and_copy_from_iter+0x247/0x1120 lib/iov_iter.c:1705 csum_and_copy_from_iter_full include/linux/uio.h:299 [inline] ip_generic_getfrag+0x14f/0x2d0 net/ipv4/ip_output.c:946 __ip6_append_data+0x1ad4/0x38c0 net/ipv6/ip6_output.c:1704 ip6_append_data+0x1d4/0x310 net/ipv6/ip6_output.c:1769 rawv6_sendmsg+0x1222/0x1700 net/ipv6/raw.c:954 sock_sendmsg_nosec net/socket.c:706 [inline] __sock_sendmsg net/socket.c:718 [inline] ____sys_sendmsg+0x5b7/0x8f0 net/socket.c:2445 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2499 __sys_sendmsg net/socket.c:2528 [inline] __do_sys_sendmsg net/socket.c:2537 [inline] __se_sys_sendmsg+0x1af/0x290 net/socket.c:2535 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f7abd84de59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7abbaa7028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f7abdac6fa0 RCX: 00007f7abd84de59 RDX: 0000000000000060 RSI: 0000200000000080 RDI: 0000000000000008 RBP: 00007f7abd8e3d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7abdac7038 R14: 00007f7abdac6fa0 R15: 00007ffdde67c968 ---------------- Code disassembly (best guess): 0: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 7: 00 8: 0f 1f 00 nopl (%rax) b: 48 8b 1f mov (%rdi),%rbx e: 4c 8b 47 08 mov 0x8(%rdi),%r8 12: 4c 8b 5f 10 mov 0x10(%rdi),%r11 16: 48 8b 57 18 mov 0x18(%rdi),%rdx 1a: 4c 8b 57 20 mov 0x20(%rdi),%r10 1e: 4c 8b 7f 28 mov 0x28(%rdi),%r15 22: 4c 8b 77 30 mov 0x30(%rdi),%r14 26: 4c 8b 6f 38 mov 0x38(%rdi),%r13 * 2a: 0f 18 8f 40 01 00 00 prefetcht0 0x140(%rdi) <-- trapping instruction 31: 48 11 d8 adc %rbx,%rax 34: 4c 11 c0 adc %r8,%rax 37: 4c 11 d8 adc %r11,%rax 3a: 48 11 d0 adc %rdx,%rax 3d: 4c 11 d0 adc %r10,%rax