input: syz1 as /devices/virtual/input/input5
input: syz1 as /devices/virtual/input/input6
watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [kworker/u4:4:107]
Modules linked in:
CPU: 1 PID: 107 Comm: kworker/u4:4 Not tainted 4.19.0-rc1+ #36
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn (flush-8:0)
RIP: 0010:rep_nop arch/x86/include/asm/processor.h:663 [inline]
RIP: 0010:cpu_relax arch/x86/include/asm/processor.h:668 [inline]
RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline]
RIP: 0010:smp_call_function_single+0x367/0x4e0 kernel/smp.c:302
Code: fe ff ff 8b 3a e8 e9 50 6d 00 45 85 f6 0f 84 6d ff ff ff 41 89 de eb 10 90 66 2e 0f 1f 84 00 00 00 00 00 e8 ab 50 12 00 f3 90 <8b> 5c 24 78 4c 89 e7 e8 5d 47 6d 00 8b 00 83 e0 01 83 e3 01 85 c0
RSP: 0018:ffff8801d554e8c0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffffffff81542b05 RBX: 0000000000000001 RCX: ffff8801d5503b00
RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000afffd40
RBP: ffff8801d554e998 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff81179a80 R12: ffff8801d554e938
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801d5504400
FS:  0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000723984 CR3: 0000000144590000 CR4: 00000000001406e0
Call Trace:
 smp_call_function_many+0x658/0xdb0 kernel/smp.c:434
 native_flush_tlb_others+0x4e8/0x500 arch/x86/mm/tlb.c:602
 flush_tlb_mm_range+0x32b/0x450 arch/x86/mm/tlb.c:651
 flush_tlb_page arch/x86/include/asm/tlbflush.h:526 [inline]
 ptep_clear_flush+0x11c/0x1f0 mm/pgtable-generic.c:87
 page_mkclean_one+0x4d2/0x830 mm/rmap.c:915
 rmap_walk_file+0x727/0xf30 mm/rmap.c:1850
 rmap_walk mm/rmap.c:1868 [inline]
 page_mkclean+0x37f/0x510 mm/rmap.c:984
 clear_page_dirty_for_io+0x403/0x1020 mm/page-writeback.c:2684
 mpage_submit_page fs/ext4/inode.c:2188 [inline]
 mpage_process_page_bufs+0xa3a/0xea0 fs/ext4/inode.c:2318
 mpage_prepare_extent_to_map+0xcf3/0x1250 fs/ext4/inode.c:2680
 ext4_writepages+0x1fe7/0x67a0 fs/ext4/inode.c:2807
 do_writepages+0x184/0x3c0 mm/page-writeback.c:2341
 __writeback_single_inode+0x3da/0x1430 fs/fs-writeback.c:1323
 writeback_sb_inodes+0x117e/0x26f0 fs/fs-writeback.c:1587
 __writeback_inodes_wb+0x1e6/0x690 fs/fs-writeback.c:1656
 wb_writeback+0xe84/0x12e0 fs/fs-writeback.c:1765
 wb_check_start_all fs/fs-writeback.c:1889 [inline]
 wb_do_writeback fs/fs-writeback.c:1915 [inline]
 wb_workfn+0x10a6/0x1f00 fs/fs-writeback.c:1949
 process_one_work+0x1605/0x1f40 kernel/workqueue.c:2153
 worker_thread+0x11a2/0x2590 kernel/workqueue.c:2296
 kthread+0x465/0x4a0 kernel/kthread.c:247
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:416
Sending NMI from CPU 1 to CPUs 0:
------------[ cut here ]------------
kernel BUG at mm/kmsan/kmsan_entry.c:81!
invalid opcode: 0000 [#1] SMP PTI
CPU: 0 PID: 6872 Comm: syz-executor6 Not tainted 4.19.0-rc1+ #36
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kmsan_nmi_enter+0x42/0x70 mm/kmsan/kmsan_entry.c:80
Code: 00 74 27 65 8b 04 25 40 92 03 00 83 c0 01 83 f8 08 7d 27 65 89 04 25 40 92 03 00 65 c6 04 25 d5 6f 0b 00 ff c3 0f 0b 90 eb fe <0f> 0b 66 90 66 2e 0f 1f 84 00 00 00 00 00 eb fe 0f 0b 66 90 66 2e
RSP: 0018:fffffe000000eea8 EFLAGS: 00010046
RAX: 0000000080000200 RBX: 0000000000000001 RCX: 00000000c0000101
RDX: 00000000ffff8802 RSI: ffffffff88c0136c RDI: ffffffff7fffffff
RBP: fffffe000000eef9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 00000001963f0000 R15: 0000000000000000
FS:  00007ff337343700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000625208 CR3: 00000001963f0000 CR4: 00000000001406f0
Call Trace:
 <NMI>
 </NMI>
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace 51d5b8cb1346873f ]---
RIP: 0010:kmsan_nmi_enter+0x42/0x70 mm/kmsan/kmsan_entry.c:80
Code: 00 74 27 65 8b 04 25 40 92 03 00 83 c0 01 83 f8 08 7d 27 65 89 04 25 40 92 03 00 65 c6 04 25 d5 6f 0b 00 ff c3 0f 0b 90 eb fe <0f> 0b 66 90 66 2e 0f 1f 84 00 00 00 00 00 eb fe 0f 0b 66 90 66 2e
RSP: 0018:fffffe000000eea8 EFLAGS: 00010046
RAX: 0000000080000200 RBX: 0000000000000001 RCX: 00000000c0000101
RDX: 00000000ffff8802 RSI: ffffffff88c0136c RDI: ffffffff7fffffff
RBP: fffffe000000eef9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 00000001963f0000 R15: 0000000000000000
FS:  00007ff337343700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000625208 CR3: 00000001963f0000 CR4: 00000000001406f0