sd 0:0:1:0: [sg0] tag#3646 CDB[a0]: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
sd 0:0:1:0: [sg0] tag#3646 CDB[b0]: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
sd 0:0:1:0: [sg0] tag#3646 CDB[c0]: 00 00 00 00 00 00 00 00
=====================================================
BUG: KMSAN: uninit-value in update_stack_state+0x974/0xb40 arch/x86/kernel/unwind_frame.c:238
CPU: 1 PID: 4875 Comm: systemd-udevd 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+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+0x974/0xb40 arch/x86/kernel/unwind_frame.c:238
 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
 </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:finish_lock_switch+0x2b/0x40 kernel/sched/core.c:3198
Code: 48 89 e5 53 48 89 fb e8 c3 d8 b9 00 8b b8 88 0c 00 00 48 8b 00 48 85 c0 75 12 48 89 df e8 4d d2 b9 00 c6 00 00 c6 03 00 fb 5b <5d> c3 e8 fe d7 b9 00 eb e7 66 90 66 2e 0f 1f 84 00 00 00 00 00 55
RSP: 0018:ffff888114cabb18 EFLAGS: 00000282
RAX: ffff88821fdb2340 RBX: ffff88810ca79e80 RCX: 000000021fd13340
RDX: ffff88821fd13340 RSI: 00000000000004a0 RDI: ffff88812fd94340
RBP: ffff888114cabb18 R08: ffffea000000000f R09: ffff88812fffa000
R10: 0000000000000004 R11: 0000000000000000 R12: ffff88811940e558
R13: ffff88811940db80 R14: 0000000000000002 R15: ffff88812fd94340
 finish_task_switch+0xd2/0x2f0 kernel/sched/core.c:3303
 context_switch kernel/sched/core.c:3467 [inline]
 __schedule+0x4ae/0x520 kernel/sched/core.c:4195
 schedule+0x260/0x330 kernel/sched/core.c:4270
 schedule_hrtimeout_range_clock+0x451/0x630 kernel/time/hrtimer.c:2128
 schedule_hrtimeout_range+0x97/0xb0 kernel/time/hrtimer.c:2182
 ep_poll fs/eventpoll.c:1910 [inline]
 do_epoll_wait+0x137b/0x1d70 fs/eventpoll.c:2333
 __do_sys_epoll_wait fs/eventpoll.c:2343 [inline]
 __se_sys_epoll_wait+0xb3/0xe0 fs/eventpoll.c:2340
 __x64_sys_epoll_wait+0x56/0x70 fs/eventpoll.c:2340
 do_syscall_64+0xad/0x160 arch/x86/entry/common.c:386
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f70ed94f2e3
Code: Bad RIP value.
RSP: 002b:00007fff86490528 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 0000563cad2a9d00 RCX: 00007f70ed94f2e3
RDX: 000000000000000b RSI: 00007fff86490530 RDI: 000000000000000a
RBP: 00007fff864906c0 R08: 0000000000000008 R09: 00007fff865e4080
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff86490530
R13: 0000000000000001 R14: ffffffffffffffff R15: 0000000000000000

Local variable ----stack@__bpf_prog_run32 created at:
 __bpf_prog_run32+0x6e/0x190 kernel/bpf/core.c:1692
 __bpf_prog_run32+0x6e/0x190 kernel/bpf/core.c:1692
=====================================================