KASAN: use-after-free Read in __ext4_check_dir

Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported
KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry ext4	C			18	2217d	2218d

2217d

2218d

Title	Replies (including bot)	Last reply
[PATCH 3.16 000/366] 3.16.60-rc1 review	370 (370)	2019/03/29 15:47
[PATCH 4.16 000/196] 4.16.4-stable review	213 (213)	2018/04/28 14:59
KASAN: use-after-free Read in __ext4_check_dir_entry	0 (1)	2018/03/31 20:47
KASAN: use-after-free Read in __ext4_check_dir_entry	0 (1)	2018/03/31 20:47

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.14	KASAN: use-after-free Read in __ext4_check_dir_entry	C		inconclusive	6	1311d	1415d	0/1	upstream: reported C repro on 2020/06/12 02:23

linux-4.14

KASAN: use-after-free Read in __ext4_check_dir_entry

inconclusive

1311d

1415d

0/1

upstream: reported C repro on 2020/06/12 02:23

================================================================== BUG: KASAN: use-after-free in __ext4_check_dir_entry+0x2de/0x320 fs/ext4/dir.c:69 Read of size 2 at addr ffff8801b80bf000 by task syzkaller432828/4365 CPU: 1 PID: 4365 Comm: syzkaller432828 Not tainted 4.16.0-rc7+ #7 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 print_address_description+0x73/0x250 mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report+0x23c/0x360 mm/kasan/report.c:412 __asan_report_load2_noabort+0x14/0x20 mm/kasan/report.c:431 __ext4_check_dir_entry+0x2de/0x320 fs/ext4/dir.c:69 ext4_readdir+0xd00/0x3600 fs/ext4/dir.c:237 iterate_dir+0x1ca/0x530 fs/readdir.c:51 SYSC_getdents64 fs/readdir.c:314 [inline] SyS_getdents64+0x221/0x420 fs/readdir.c:295 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x43fd69 RSP: 002b:00007ffc446ac118 EFLAGS: 00000203 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd69 RDX: 00000000200015fc RSI: 0000000020001540 RDI: 0000000000000003 RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 R10: 00000000004002c8 R11: 0000000000000203 R12: 0000000000401690 R13: 0000000000401720 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to the page: page:ffffea0006e02fc0 count:0 mapcount:0 mapping:0000000000000000 index:0x0 flags: 0x2fffc0000000000() raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff raw: ffffea0006c095a0 ffffea0006e03020 ffff8801be5f2a50 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801b80bef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801b80bef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801b80bf000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8801b80bf080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8801b80bf100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================

Crashes (8):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Manager
2018/03/31 05:05	upstream	9dd2326890d8	8fbce0e4	.config	console log	report	syz	C	ci-upstream-kasan-gce-root
2018/04/03 12:17	upstream	642e7fd23353	676bd07e	.config	console log	report			ci-upstream-kasan-gce-root
2018/04/01 11:07	upstream	10b84daddbec	0174c6c8	.config	console log	report			ci-upstream-kasan-gce-root
2018/04/01 07:39	upstream	10b84daddbec	0174c6c8	.config	console log	report			ci-upstream-kasan-gce-root
2018/04/01 07:30	upstream	10b84daddbec	0174c6c8	.config	console log	report			ci-upstream-kasan-gce-root
2018/04/01 06:13	upstream	10b84daddbec	0174c6c8	.config	console log	report			ci-upstream-kasan-gce-root
2018/04/01 02:19	upstream	10b84daddbec	0174c6c8	.config	console log	report			ci-upstream-kasan-gce-root
2018/04/01 02:15	upstream	10b84daddbec	0174c6c8	.config	console log	report			ci-upstream-kasan-gce-root

Crashes (8):

Assets (help?)