KASAN: out-of-bounds Read in ext4_xattr_set

Date	Name	Commit	Repro	Result
2023/07/08	linux-6.1.y (ToT)	61fd484b2cf6	C	[report] INFO: rcu detected stall in corrupted
2023/05/20	upstream (ToT)	d635f6cc934b	C	[report] WARNING in ext4_da_update_reserve_space
2023/07/08	upstream (ToT)	8689f4f2ea56	C	Didn't crash

Date

Name

Commit

Repro

Result

2023/07/08

linux-6.1.y (ToT)

61fd484b2cf6

[report] INFO: rcu detected stall in corrupted

2023/05/20

upstream (ToT)

d635f6cc934b

[report] WARNING in ext4_da_update_reserve_space

2023/07/08

upstream (ToT)

8689f4f2ea56

Didn't crash

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.19	KASAN: use-after-free Read in ext4_xattr_set_entry (2)	C		done	7	1094d	1552d	1/1	fixed on 2021/10/13 07:23
android-5-15	KASAN: out-of-bounds Read in ext4_xattr_set_entry				1	449d	449d	0/2	auto-obsoleted due to no activity on 2023/09/17 07:02
android-54	KASAN: out-of-bounds Read in ext4_xattr_set_entry ext4	C			14	503d	1269d	0/2	auto-obsoleted due to no activity on 2023/08/23 09:06
android-5-10	KASAN: out-of-bounds Read in ext4_xattr_set_entry	C		inconclusive	1	43d	357d	0/2	upstream: reported C repro on 2023/09/20 02:40
linux-4.14	KASAN: out-of-bounds Read in ext4_xattr_set_entry	C		error	2	733d	1247d	0/1	upstream: reported C repro on 2021/04/12 14:20
android-6-1	KASAN: out-of-bounds Read in ext4_xattr_set_entry origin:lts	C			1	25d	120d	0/2	upstream: reported C repro on 2024/05/13 18:18
android-5-15	general protection fault in ext4_xattr_set_entry	C	error		1	558d	638d	2/2	fixed on 2023/03/28 12:29
android-5-10	general protection fault in ext4_xattr_set_entry (4)	C	error		62	461d	490d	2/2	fixed on 2023/06/07 17:22
android-5-10	general protection fault in ext4_xattr_set_entry (2) ext4	C	error		423	496d	696d	2/2	fixed on 2023/05/03 13:06
upstream	KASAN: use-after-free Read in ext4_xattr_set_entry (5) ext4				2	778d	836d	0/27	auto-obsoleted due to no activity on 2022/11/22 17:19
android-5-10	general protection fault in ext4_xattr_set_entry (3)	C	error		9	492d	495d	2/2	fixed on 2023/05/08 19:06
upstream	KASAN: use-after-free Read in ext4_xattr_set_entry (4) ext4	C	error	done	21	932d	1319d	20/27	fixed on 2022/03/28 10:17
android-5-10	general protection fault in ext4_xattr_set_entry	C	error		2	719d	733d	0/2	closed as invalid on 2022/09/26 18:30
android-5-10	general protection fault in ext4_xattr_set_entry (5)	C	done		11	458d	460d	2/2	fixed on 2023/06/13 02:27

Created	Duration	User	Patch	Repo	Result
2023/11/03 13:20	5h40m	fix candidate		upstream	OK (1) job log
2023/06/19 08:59	45m	bisect fix		linux-6.1.y	OK (0) job log log

Created

Duration

User

Patch

Repo

Result

2023/11/03 13:20

5h40m

fix candidate

upstream

OK (1) job log

2023/06/19 08:59

45m

bisect fix

linux-6.1.y

OK (0) job log log

================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x11dd/0x3c00 fs/ext4/xattr.c:1749 Read of size 18446744073709551580 at addr ffff8880276351cc by task syz-executor.4/5459 CPU: 1 PID: 5459 Comm: syz-executor.4 Not tainted 6.1.29-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:395 kasan_report+0x136/0x160 mm/kasan/report.c:495 kasan_check_range+0x27f/0x290 mm/kasan/generic.c:189 memmove+0x25/0x60 mm/kasan/shadow.c:54 ext4_xattr_set_entry+0x11dd/0x3c00 fs/ext4/xattr.c:1749 ext4_xattr_ibody_set+0x11d/0x330 fs/ext4/xattr.c:2238 ext4_destroy_inline_data_nolock+0x20e/0x610 fs/ext4/inline.c:451 ext4_destroy_inline_data+0x7e/0xe0 fs/ext4/inline.c:1886 ext4_writepages+0x6ae/0x3de0 fs/ext4/inode.c:2747 do_writepages+0x3a2/0x670 mm/page-writeback.c:2469 filemap_fdatawrite_wbc+0x121/0x180 mm/filemap.c:388 __filemap_fdatawrite_range mm/filemap.c:421 [inline] __filemap_fdatawrite mm/filemap.c:427 [inline] filemap_flush+0x11a/0x170 mm/filemap.c:454 ext4_convert_inline_data+0x1a1/0x610 fs/ext4/inline.c:2055 ext4_fallocate+0x149/0x2160 fs/ext4/extents.c:4702 vfs_fallocate+0x547/0x6b0 fs/open.c:323 ksys_fallocate fs/open.c:346 [inline] __do_sys_fallocate fs/open.c:354 [inline] __se_sys_fallocate fs/open.c:352 [inline] __x64_sys_fallocate+0xb9/0x100 fs/open.c:352 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f3700c8c169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3701a17168 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f3700dac120 RCX: 00007f3700c8c169 RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f3700ce7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd8a9fcf2f R14: 00007f3701a17300 R15: 0000000000022000 </TASK> The buggy address belongs to the physical page: page:ffffea00009d8d40 refcount:2 mapcount:0 mapping:ffff888012896af8 index:0x3 pfn:0x27635 memcg:ffff888140160000 aops:def_blk_aops ino:700004 flags: 0xfff38000022056(referenced|uptodate|lru|workingset|private|mappedtodisk|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff38000022056 ffffea00008cd288 ffffea0000846308 ffff888012896af8 raw: 0000000000000003 ffff8880739afcb0 00000002ffffffff ffff888140160000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x152c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 3549, tgid 3549 (udevd), ts 153991730540, free_ts 153777865953 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2533 prep_new_page mm/page_alloc.c:2540 [inline] get_page_from_freelist+0x32ed/0x3480 mm/page_alloc.c:4292 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5559 folio_alloc+0x1a/0x50 mm/mempolicy.c:2290 filemap_alloc_folio+0xda/0x4f0 mm/filemap.c:971 page_cache_ra_unbounded+0x1ee/0x7b0 mm/readahead.c:248 do_page_cache_ra mm/readahead.c:300 [inline] force_page_cache_ra mm/readahead.c:331 [inline] page_cache_sync_ra+0x3c5/0x480 mm/readahead.c:705 page_cache_sync_readahead include/linux/pagemap.h:1213 [inline] filemap_get_pages mm/filemap.c:2582 [inline] filemap_read+0x7fa/0x31d0 mm/filemap.c:2676 blkdev_read_iter+0x3e1/0x520 block/fops.c:613 call_read_iter include/linux/fs.h:2199 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7de/0xbe0 fs/read_write.c:470 ksys_read+0x19c/0x2c0 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1460 [inline] free_pcp_prepare mm/page_alloc.c:1510 [inline] free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3388 free_unref_page_list+0x107/0x810 mm/page_alloc.c:3530 release_pages+0x2836/0x2b40 mm/swap.c:1055 __pagevec_release+0x80/0xf0 mm/swap.c:1075 pagevec_release include/linux/pagevec.h:71 [inline] folio_batch_release include/linux/pagevec.h:135 [inline] invalidate_mapping_pagevec+0x621/0x730 mm/truncate.c:543 ext4_put_super+0x938/0x10f0 fs/ext4/super.c:1273 generic_shutdown_super+0x130/0x340 fs/super.c:501 kill_block_super+0x7a/0xe0 fs/super.c:1450 deactivate_locked_super+0xa0/0x110 fs/super.c:332 cleanup_mnt+0x490/0x520 fs/namespace.c:1186 task_work_run+0x246/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff888027635080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888027635100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888027635180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888027635200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888027635280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================

Crashes (2):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2023/05/19 08:42	linux-6.1.y	fa74641fb6b9	3bb7af1d	.config	console log	report	syz			[disk image] [vmlinux] [kernel image] [mounted in repro]	ci2-linux-6-1-kasan	KASAN: out-of-bounds Read in ext4_xattr_set_entry
2024/05/16 06:34	linux-6.1.y	909ba1f1b414	ef5d53ed	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-6-1-kasan	KASAN: out-of-bounds Read in ext4_xattr_set_entry

Crashes (2):

Assets (help?)