===================================================== BUG: KMSAN: uninit-value in update_stack_state+0x1ee/0xb40 arch/x86/kernel/unwind_frame.c:202 CPU: 1 PID: 16091 Comm: syz-executor.4 Not tainted 5.8.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x21c/0x280 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 update_stack_state+0x1ee/0xb40 arch/x86/kernel/unwind_frame.c:202 unwind_next_frame+0x8c6/0xed0 arch/x86/kernel/unwind_frame.c:305 arch_stack_walk+0x338/0x3d0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x117/0x1a0 kernel/stacktrace.c:123 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:310 kmsan_memcpy_memmove_metadata+0x272/0x2e0 mm/kmsan/kmsan.c:247 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:267 __msan_memcpy+0x43/0x50 mm/kmsan/kmsan_instr.c:116 pskb_expand_head+0x3fd/0x1e30 net/core/skbuff.c:1636 __skb_pad+0x641/0x9d0 net/core/skbuff.c:1804 __skb_put_padto include/linux/skbuff.h:3218 [inline] skb_put_padto include/linux/skbuff.h:3237 [inline] send_hsr_supervision_frame+0x129c/0x15b0 net/hsr/hsr_device.c:299 hsr_announce+0x21f/0x3c0 net/hsr/hsr_device.c:330 call_timer_fn+0x226/0x550 kernel/time/timer.c:1404 expire_timers+0x4fc/0x780 kernel/time/timer.c:1449 __run_timers+0xaf4/0xd30 kernel/time/timer.c:1773 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1786 __do_softirq+0x2ea/0x7f5 kernel/softirq.c:293 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 __run_on_irqstack arch/x86/include/asm/irq_stack.h:23 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline] do_softirq_own_stack+0x7c/0xa0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:390 [inline] __irq_exit_rcu+0x226/0x270 kernel/softirq.c:420 irq_exit_rcu+0xe/0x10 kernel/softirq.c:432 sysvec_call_function_single+0x107/0x130 arch/x86/kernel/smp.c:243 asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:601 RIP: 0010:kmsan_get_shadow_origin_ptr+0x4/0xb0 mm/kmsan/kmsan_shadow.c:137 Code: d9 2b 77 10 00 75 10 48 8b 45 b8 c6 80 d0 09 00 00 01 e9 62 fe ff ff 48 c7 c7 e8 a5 df 91 31 c0 e8 3a c8 2f ff cc 55 48 89 e5 <41> 57 41 56 53 41 89 d7 48 89 f1 49 89 fe 48 81 fe 01 10 00 00 73 RSP: 0018:ffff8881b3917968 EFLAGS: 00000246 RAX: 0000000080085502 RBX: ffff8881b3917b50 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881b3917b50 RBP: ffff8881b3917968 R08: ffffffff8549e20a R09: ffff88812fffa000 R10: 0000000000000002 R11: ffff888115bb9e80 R12: 0000000000000000 R13: ffff888115bba858 R14: ffff88804818e004 R15: 0000000000000000 __msan_metadata_ptr_for_load_8+0x10/0x20 mm/kmsan/kmsan_instr.c:55 tomoyo_compare_number_union security/tomoyo/file.c:282 [inline] tomoyo_check_path_number_acl+0x125/0x510 security/tomoyo/file.c:282 tomoyo_check_acl+0x239/0x5a0 security/tomoyo/domain.c:175 tomoyo_path_number_perm+0x62e/0xaf0 security/tomoyo/file.c:733 tomoyo_file_ioctl+0x74/0x90 security/tomoyo/tomoyo.c:329 security_file_ioctl+0x10a/0x210 security/security.c:1480 __do_compat_sys_ioctl fs/ioctl.c:808 [inline] __se_compat_sys_ioctl+0x166/0x1100 fs/ioctl.c:798 __ia32_compat_sys_ioctl+0x4a/0x70 fs/ioctl.c:798 do_syscall_32_irqs_on arch/x86/entry/common.c:430 [inline] __do_fast_syscall_32+0x2af/0x480 arch/x86/entry/common.c:477 do_fast_syscall_32+0x6b/0xd0 arch/x86/entry/common.c:505 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:554 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7fd9549 Code: Bad RIP value. RSP: 002b:00000000f55d0fe8 EFLAGS: 00000296 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000080085502 RDX: 00000000f55d205c RSI: 00000000f55d205c RDI: 0000000000000003 RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Local variable ----page@get_futex_key created at: get_futex_key+0xce/0x2220 kernel/futex.c:507 get_futex_key+0xce/0x2220 kernel/futex.c:507 =====================================================