KASAN: use-after-free Read in ext4_xattr_set

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.14	KASAN: use-after-free Read in ext4_xattr_set_entry (3)	C		error	1	1188d	1673d	0/1	upstream: reported C repro on 2020/10/28 15:08
android-414	KASAN: use-after-free Read in ext4_xattr_set_entry (2)				6	2036d	2092d	0/1	auto-closed as invalid on 2020/02/28 13:35
linux-4.14	KASAN: use-after-free Read in ext4_xattr_set_entry (2)				1	1892d	1892d	0/1	auto-closed as invalid on 2020/07/21 03:20
linux-4.19	KASAN: use-after-free Read in ext4_xattr_set_entry (2)	C		done	7	1354d	1812d	1/1	fixed on 2021/10/13 07:23
upstream	KASAN: use-after-free Read in ext4_xattr_set_entry ext4				1	2497d	2497d	0/28	closed as invalid on 2018/07/29 11:55
upstream	KASAN: use-after-free Read in ext4_xattr_set_entry (5) ext4				2	1038d	1096d	0/28	auto-obsoleted due to no activity on 2022/11/22 17:19
upstream	KASAN: use-after-free Read in ext4_xattr_set_entry (3) ext4				4	1788d	1906d	0/28	auto-closed as invalid on 2020/11/02 08:32
linux-4.19	KASAN: use-after-free Read in ext4_xattr_set_entry	syz		done	10	1915d	2164d	1/1	fixed on 2020/03/30 09:03
upstream	KASAN: use-after-free Read in ext4_xattr_set_entry (4) ext4	C	error	done	21	1192d	1579d	20/28	fixed on 2022/03/28 10:17
upstream	KASAN: use-after-free Read in ext4_xattr_set_entry (2) ext4	C	done		19	1990d	2399d	15/28	fixed on 2020/02/14 01:19
android-54	KASAN: use-after-free Read in ext4_xattr_set_entry				6	1756d	1937d	0/2	auto-closed as invalid on 2020/12/04 21:44
android-5-10	KASAN: out-of-bounds Read in ext4_xattr_set_entry	C		inconclusive	9	1d20h	616d	0/2	upstream: reported C repro on 2023/09/20 02:40
linux-4.14	KASAN: use-after-free Read in ext4_xattr_set_entry	C		done	9	1944d	2036d	1/1	fixed on 2020/03/01 21:06

================================================================== BUG: KASAN: use-after-free in memmove include/linux/string.h:359 [inline] BUG: KASAN: use-after-free in ext4_xattr_set_entry+0x92d/0x2e40 fs/ext4/xattr.c:1739 Read of size 4 at addr ffff888190f21ffd by task syz-fuzzer/1792 CPU: 0 PID: 1792 Comm: syz-fuzzer Not tainted 4.14.90+ #29 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x11b lib/dump_stack.c:53 print_address_description+0x60/0x22b mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report.cold.6+0x11b/0x2dd mm/kasan/report.c:409 memmove+0x1f/0x50 mm/kasan/kasan.c:293 memmove include/linux/string.h:359 [inline] ext4_xattr_set_entry+0x92d/0x2e40 fs/ext4/xattr.c:1739 ext4_xattr_ibody_set+0x73/0x280 fs/ext4/xattr.c:2245 ext4_xattr_set_handle+0x6a6/0xdc0 fs/ext4/xattr.c:2401 ext4_initxattrs+0xb8/0x110 fs/ext4/xattr_security.c:43 security_inode_init_security+0x228/0x310 security/security.c:493 __ext4_new_inode+0x3473/0x48e0 fs/ext4/ialloc.c:1166 ext4_mkdir+0x234/0xb40 fs/ext4/namei.c:2625 vfs_mkdir2+0x3cb/0x640 fs/namei.c:3883 SYSC_mkdirat fs/namei.c:3912 [inline] SyS_mkdirat+0x126/0x220 fs/namei.c:3896 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x47fc44 RSP: 002b:000000c42013d898 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fc44 RDX: 00000000000001c0 RSI: 000000c42a04c2c0 RDI: ffffffffffffff9c RBP: 000000c42013d8f8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000001000000 R13: 0000000000000020 R14: 0000000000000013 R15: 0000000000000000 The buggy address belongs to the page: page:ffffea000643c840 count:2 mapcount:0 mapping:ffff8881d9aa8950 index:0x483 flags: 0x4000000000001074(referenced|dirty|lru|active|private) raw: 4000000000001074 ffff8881d9aa8950 0000000000000483 00000002ffffffff raw: ffffea00064b1ce0 ffffea000643b4e0 ffff88818fa31498 ffff8881da81aa80 page dumped because: kasan: bad access detected page->mem_cgroup:ffff8881da81aa80 Memory state around the buggy address: ffff888190f21f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888190f21f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888190f22000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888190f22080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888190f22100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================

Crashes (4):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Manager
2018/12/28 01:14	android-4.14	815e34f802d8	af317504	.config	console log	report	ci-android-414-kasan-gce-root
2018/12/11 20:44	android-4.14	e525d2cfbe65	7795ae03	.config	console log	report	ci-android-414-kasan-gce-root
2018/11/02 21:33	android-4.14	4ed22187defd	8bd6bd63	.config	console log	report	ci-android-414-kasan-gce-root
2018/10/25 18:06	android-4.14	4ed22187defd	a8292de9	.config	console log	report	ci-android-414-kasan-gce-root

Crashes (4):

Assets (help?)