KASAN: vmalloc-out-of-bounds Read in acpi_nfit

KASAN: vmalloc-out-of-bounds Read in acpi_nfit_ctl
Status: auto-closed as invalid on 2020/05/14 04:56
Reported-by: syzbot+002f559bf34c2c7467d0@syzkaller.appspotmail.com
First crash: 372d, last: 370d

Sample crash report:

==================================================================
BUG: KASAN: vmalloc-out-of-bounds in test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline]
BUG: KASAN: vmalloc-out-of-bounds in acpi_nfit_ctl+0x47f/0x1840 drivers/acpi/nfit/core.c:495
Read of size 8 at addr ffffc900296c9bb8 by task syz-executor.1/7491

CPU: 1 PID: 7491 Comm: syz-executor.1 Not tainted 5.5.0-rc6-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x197/0x210 lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0x5/0x30b mm/kasan/report.c:374
 __kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506
 kasan_report+0x12/0x20 mm/kasan/common.c:639
 check_memory_region_inline mm/kasan/generic.c:185 [inline]
 check_memory_region+0x134/0x1a0 mm/kasan/generic.c:192
 __kasan_check_read+0x11/0x20 mm/kasan/common.c:95
 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline]
 acpi_nfit_ctl+0x47f/0x1840 drivers/acpi/nfit/core.c:495
 __nd_ioctl drivers/nvdimm/bus.c:1152 [inline]
 nd_ioctl.isra.0+0xfe2/0x1580 drivers/nvdimm/bus.c:1230
 bus_ioctl+0x59/0x70 drivers/nvdimm/bus.c:1242
 compat_ptr_ioctl+0x6e/0xa0 fs/ioctl.c:788
 __do_compat_sys_ioctl fs/compat_ioctl.c:214 [inline]
 __se_compat_sys_ioctl fs/compat_ioctl.c:142 [inline]
 __ia32_compat_sys_ioctl+0x233/0x610 fs/compat_ioctl.c:142
 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline]
 do_fast_syscall_32+0x27b/0xe16 arch/x86/entry/common.c:408
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f29a39
Code: 00 00 00 89 d3 5b 5e 5f 5d c3 b8 80 96 98 00 eb c4 8b 04 24 c3 8b 1c 24 c3 8b 34 24 c3 8b 3c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f5d250cc EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 000000000000560a
RDX: 0000000020000200 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000


Memory state around the buggy address:
 ffffc900296c9a80: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
 ffffc900296c9b00: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
>ffffc900296c9b80: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
                                        ^
 ffffc900296c9c00: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
 ffffc900296c9c80: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
==================================================================

Crashes (2):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Maintainers
ci-qemu-upstream-386	2020/01/15 04:55	upstream	452424cd	fa12bd3c	.config	log	report				dan.j.williams@intel.com, dave.jiang@intel.com, ira.weiny@intel.com, lenb@kernel.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, rjw@rjwysocki.net, vishal.l.verma@intel.com
ci-qemu-upstream-386	2020/01/13 04:47	upstream	040a3c33	53faa9fe	.config	log	report				dan.j.williams@intel.com, dave.jiang@intel.com, ira.weiny@intel.com, lenb@kernel.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, rjw@rjwysocki.net, vishal.l.verma@intel.com