==================================================================
BUG: KASAN: stack-out-of-bounds in zap_pmd_range mm/memory.c:1421 [inline]
BUG: KASAN: stack-out-of-bounds in zap_pud_range mm/memory.c:1466 [inline]
BUG: KASAN: stack-out-of-bounds in zap_p4d_range mm/memory.c:1487 [inline]
BUG: KASAN: stack-out-of-bounds in unmap_page_range+0x1dde/0x2220 mm/memory.c:1508
Read of size 8 at addr ffff880198fdd3c8 by task syz-executor0/20351
CPU: 0 PID: 20351 Comm: syz-executor0 Not tainted 4.18.0-rc3+ #1
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+0x1c9/0x2b4 lib/dump_stack.c:113
print_address_description+0x6c/0x20b mm/kasan/report.c:256
kasan_report_error mm/kasan/report.c:354 [inline]
kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412
__asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
PANIC: double fault, error_code: 0x0
zap_pmd_range mm/memory.c:1421 [inline]
zap_pud_range mm/memory.c:1466 [inline]
zap_p4d_range mm/memory.c:1487 [inline]
unmap_page_range+0x1dde/0x2220 mm/memory.c:1508
CPU: 1 PID: 20360 Comm: syz-executor1 Not tainted 4.18.0-rc3+ #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:778 [inline]
RIP: 0010:__lock_acquire+0xb1c/0x5020 kernel/locking/lockdep.c:3311
Code: 88
48 b8
00 00
00 00
00 fc
ff df
48 89
fa 48
c1 ea
03 80
3c 02
00 0f
85 0d
31 00
00 48
83 3d
0a fd
92 07
00 0f
84 d3
0a 00
00 <9c>
58 0f
1f 44
00 00
f6 c4
02 0f
unmap_single_vma+0x1a0/0x310 mm/memory.c:1553
84 63
unmap_vmas+0x120/0x1f0 mm/memory.c:1583
f6 ff
exit_mmap+0x2c2/0x5b0 mm/mmap.c:3105
ff e8
3f 32
fd 01
__mmput kernel/fork.c:970 [inline]
mmput+0x265/0x620 kernel/fork.c:991
85
RSP: 0018:ffff880195bfffe0 EFLAGS: 00010082
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000002
RDX: 1ffffffff11e360c RSI: 0000000000000000 RDI: ffffffff88f1b060
RBP: ffff880195c00370 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000001 R12: 0000000000000000
R13: ffffffff88f92620 R14: ffff88019c3c4700 R15: 0000000000000002
FS: 00007fba09739700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff880195bfffd8 CR3: 00000001d4a02000 CR4: 00000000001406e0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
exit_mm kernel/exit.c:544 [inline]
do_exit+0xea9/0x2750 kernel/exit.c:852