=====================================================
BUG: KMSAN: uninit-value in update_stack_state+0x974/0xb40 arch/x86/kernel/unwind_frame.c:238
CPU: 0 PID: 8458 Comm: syz-executor.0 Not tainted 5.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1df/0x240 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+0x974/0xb40 arch/x86/kernel/unwind_frame.c:238
 unwind_next_frame+0x8c6/0xed0 arch/x86/kernel/unwind_frame.c:305
 arch_stack_walk+0x33e/0x3e0 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+0x38b/0x1b00 net/core/skbuff.c:1636
 __skb_pad+0x47f/0x900 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+0x122d/0x1500 net/hsr/hsr_device.c:299
 hsr_announce+0x1e2/0x370 net/hsr/hsr_device.c:330
 call_timer_fn+0x218/0x510 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers+0xd20/0x11c0 kernel/time/timer.c:1773
 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1786
 __do_softirq+0x311/0x83d kernel/softirq.c:293
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __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:handle_mm_fault+0x353/0x9ff0 mm/memory.c:4376
Code: 00 00 e8 80 3f 1c 00 48 8b 18 44 8b 32 48 85 db 74 0f 48 89 d8 48 f7 d0 4c 21 e0 0f 84 ef 04 00 00 4d 85 e4 0f 84 f7 04 00 00 <48> 83 bd 58 ff ff ff 00 0f 85 8c 1c 00 00 48 8b bd 20 ff ff ff 4c
RSP: 0000:ffffa66580e13c38 EFLAGS: 00000286
RAX: ffff897f95305f68 RBX: 0000000000000000 RCX: 000000000056b319
RDX: ffff897f95705f68 RSI: 0000000000000440 RDI: ffff897f95b05f68
RBP: ffffa66580e13dc0 R08: ffffe5750000000f R09: ffff897fafffb000
R10: 0000000000000004 R11: 00000000ffffffff R12: ffff897f8b27d100
R13: 0000000000000000 R14: 0000000000000000 R15: 00000000ffffffff
 do_user_addr_fault+0xb74/0x1600 arch/x86/mm/fault.c:1308
 handle_page_fault arch/x86/mm/fault.c:1378 [inline]
 __exc_page_fault+0xdf/0x390 arch/x86/mm/fault.c:1431
 exc_page_fault+0x45/0x50 arch/x86/mm/fault.c:1390
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:550
RIP: 0033:0x45a92e
Code: Bad RIP value.
RSP: 002b:0000000000c9fd60 EFLAGS: 00010246
RAX: 0000000000000001 RBX: 0000000000c9fd60 RCX: 000000000045a80a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000c9fda0 R08: 0000000000000001 R09: 00000000029ba940
R10: 00000000029bac10 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000000b2 R14: 0000000000000000 R15: 0000000000c9fdf0

Local variable ----fl.i@locks_remove_file created at:
 file_inode fs/locks.c:2785 [inline]
 locks_remove_flock fs/locks.c:2735 [inline]
 locks_remove_file+0xf3/0x2020 fs/locks.c:2788
 file_inode fs/locks.c:2785 [inline]
 locks_remove_flock fs/locks.c:2735 [inline]
 locks_remove_file+0xf3/0x2020 fs/locks.c:2788
=====================================================