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Date:   Thu, 06 Aug 2020 19:26:25 -0700
From:   syzbot <>
Subject: WARNING in irqentry_exit


syzbot found the following issue on:

HEAD commit:    47ec5303 Merge git://
git tree:       upstream
console output:
kernel config:
dashboard link:
compiler:       gcc (GCC) 10.1.0-syz 20200507
syz repro:
C reproducer:

IMPORTANT: if you fix the issue, please add the following tag to the commit:

------------[ cut here ]------------
WARNING: CPU: 0 PID: 6845 at kernel/entry/common.c:338 irqentry_exit+0x47/0x90 kernel/entry/common.c:342
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 6845 Comm: syz-executor025 Not tainted 5.8.0-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+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x45 kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:255
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:irqentry_exit+0x47/0x90 kernel/entry/common.c:338
Code: 27 f6 87 91 00 00 00 02 74 18 40 84 f6 75 3b 65 8b 05 ad ea 12 78 a9 ff ff ff 7f 74 11 e9 91 cd 8a f9 40 84 f6 75 3f c3 eb 89 <0f> 0b eb ca e8 f0 bf 72 f9 65 48 8b 04 25 00 ff 01 00 48 8b 00 a8
RSP: 0000:ffffc900054471d0 EFLAGS: 00010002
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8179db77
RDX: ffff88809b98e340 RSI: 0000000000000000 RDI: ffffc90005447208
RBP: ffffc90005447208 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 exc_page_fault+0xc2/0x160 arch/x86/mm/fault.c:1421
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:538
RIP: 0010:__softirqentry_text_end+0x39/0x55
Code: be 04 e0 ff ba f2 ff ff ff 31 c9 e9 db c5 ce ff 41 bf f2 ff ff ff 31 c0 e9 6a 36 e1 f8 41 bf f2 ff ff ff 31 ed e9 85 36 e1 f8 <41> be f2 ff ff ff 48 31 c0 e9 92 39 e1 f8 41 be f2 ff ff ff 48 31
RSP: 0000:ffffc900054472b0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffffc90005447370 RCX: ffffffff810143e2
RDX: ffff88809b98e340 RSI: ffffffff810143f0 RDI: 0000000000000006
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88809b98e347
R10: 0000000000000000 R11: 0000000000000001 R12: ffffc9000544737c
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88809b98e340
 get_perf_callchain+0x321/0x620 kernel/events/callchain.c:222
 perf_callchain+0x165/0x1c0 kernel/events/core.c:6986
 perf_prepare_sample+0x8fd/0x1d40 kernel/events/core.c:7013
 __perf_event_output kernel/events/core.c:7171 [inline]
 perf_event_output_forward+0xf3/0x270 kernel/events/core.c:7191
 __perf_event_overflow+0x13c/0x370 kernel/events/core.c:8846
 perf_swevent_overflow kernel/events/core.c:8922 [inline]
 perf_swevent_event+0x4b9/0x550 kernel/events/core.c:8960
 perf_tp_event+0x2e4/0xb50 kernel/events/core.c:9378
 perf_trace_run_bpf_submit+0x11c/0x200 kernel/events/core.c:9352
 perf_trace_lock+0x2e2/0x4a0 include/trace/events/lock.h:39
 trace_lock_release include/trace/events/lock.h:58 [inline]
 lock_release+0x571/0x8e0 kernel/locking/lockdep.c:5022
 alloc_set_pte+0x3af/0x1ac0 mm/memory.c:3675
 filemap_map_pages+0x103d/0x1280 mm/filemap.c:2725
 do_fault_around mm/memory.c:3818 [inline]
 do_read_fault mm/memory.c:3852 [inline]
 do_fault mm/memory.c:3985 [inline]
 handle_pte_fault mm/memory.c:4225 [inline]
 __handle_mm_fault mm/memory.c:4357 [inline]
 handle_mm_fault+0x39b7/0x43f0 mm/memory.c:4394
 do_user_addr_fault+0x5a2/0xd00 arch/x86/mm/fault.c:1295
 handle_page_fault arch/x86/mm/fault.c:1365 [inline]
 exc_page_fault+0xa8/0x160 arch/x86/mm/fault.c:1418
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:538
RIP: 0033:0x49f4d0
Code: Bad RIP value.
RSP: 002b:00007fff1785f378 EFLAGS: 00010202
RAX: 000000000049f4d0 RBX: 0000000000000001 RCX: 00000000006d1190
RDX: 0000000000402140 RSI: 0000000000000000 RDI: 00000000004bf848
RBP: 00007fff1785f380 R08: 00000000004002c8 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..

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