do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7f39549 ===================================================== BUG: KMSAN: uninit-value in show_opcodes+0x2c1/0x2e0 arch/x86/kernel/dumpstack.c:123 show_opcodes+0x2c1/0x2e0 arch/x86/kernel/dumpstack.c:123 show_ip arch/x86/kernel/dumpstack.c:144 [inline] show_iret_regs+0xe3/0x230 arch/x86/kernel/dumpstack.c:149 __show_regs+0x31/0xc90 arch/x86/kernel/process_64.c:74 show_regs_if_on_stack+0x45e/0x530 arch/x86/kernel/dumpstack.c:167 show_trace_log_lvl+0x392/0x490 arch/x86/kernel/dumpstack.c:298 show_regs+0xad/0xd0 arch/x86/kernel/dumpstack.c:475 __warn+0x242/0x580 kernel/panic.c:618 report_bug+0x7ff/0xa10 lib/bug.c:198 handle_bug+0x41/0x70 arch/x86/kernel/traps.c:317 exc_invalid_op+0x1b/0x50 arch/x86/kernel/traps.c:338 asm_exc_invalid_op+0x1b/0x20 arch/x86/include/asm/idtentry.h:568 folio_order include/linux/mm.h:732 [inline] free_large_kmalloc+0x5a/0x230 mm/slab_common.c:921 kfree+0x1d3/0x420 mm/slab_common.c:1001 kvfree+0x65/0x70 mm/util.c:627 xt_free_table_info+0x135/0x1d0 net/netfilter/x_tables.c:1208 __do_replace+0xf29/0x11e0 net/ipv4/netfilter/arp_tables.c:933 compat_do_replace net/ipv4/netfilter/arp_tables.c:1283 [inline] do_arpt_set_ctl+0x415e/0x4810 net/ipv4/netfilter/arp_tables.c:1418 nf_setsockopt+0x48a/0x4f0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x1e7/0x210 net/ipv4/ip_sockglue.c:1444 tcp_setsockopt+0x14a/0x180 net/ipv4/tcp.c:3801 sock_common_setsockopt+0xef/0x120 net/core/sock.c:3641 __sys_setsockopt+0x8df/0xdd0 net/socket.c:2252 __do_compat_sys_socketcall net/compat.c:489 [inline] __se_compat_sys_socketcall+0xb3a/0x1a90 net/compat.c:421 __ia32_compat_sys_socketcall+0x67/0x90 net/compat.c:421 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Local variable opcodes created at: show_opcodes+0x49/0x2e0 arch/x86/kernel/dumpstack.c:118 show_ip arch/x86/kernel/dumpstack.c:144 [inline] show_iret_regs+0xe3/0x230 arch/x86/kernel/dumpstack.c:149 CPU: 0 PID: 17875 Comm: syz-executor.0 Not tainted 6.1.0-rc2-syzkaller-61955-g4a3e741a3d6a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 =====================================================