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KASAN: use-after-free Read in xfs_iflush_cluster

Status: upstream: reported C repro on 2023/03/13 14:32
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+e1bb205b7aebac1da91f@syzkaller.appspotmail.com
First crash: 420d, last: 7h09m
Fix commit to backport (bisect log) :
tree: upstream
commit 8027a9ad9b3568c5eb49c968ad6c97f279d76730
Author: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Date: Wed Jan 5 07:47:29 2022 +0000

  drm/imx: imx-ldb: Check for null pointer after calling kmemdup

[report pending]
  
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2023/07/06 linux-5.15.y (ToT) d54cfc420586 C [report] KASAN: use-after-free Read in xfs_iflush_cluster
2023/05/19 upstream (ToT) 2d1bcbc6cd70 C [report] WARNING: ODEBUG bug in netdev_run_todo
2023/07/06 upstream (ToT) a452483508d7 C Didn't crash
▶ ▼ Fix bisection attempts (2)
Created Duration User Patch Repo Result
2023/10/14 14:51 7h36m fix candidate upstream job log (1)
2023/09/18 21:36 0m bisect fix linux-5.15.y error job log (0)

Sample crash report:
==================================================================
BUG: KASAN: use-after-free in xfs_iflush_cluster+0xad/0x12a0
Read of size 8 at addr ffff88801c26f410 by task xfsaild/loop4/9854

CPU: 0 PID: 9854 Comm: xfsaild/loop4 Not tainted 5.15.112-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+0x63/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
 xfs_iflush_cluster+0xad/0x12a0
 xfs_inode_item_push+0x1cd/0x2c0 fs/xfs/xfs_inode_item.c:567
 xfsaild_push_item fs/xfs/xfs_trans_ail.c:414 [inline]
 xfsaild_push fs/xfs/xfs_trans_ail.c:472 [inline]
 xfsaild+0xd6d/0x2970 fs/xfs/xfs_trans_ail.c:657
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>

Allocated by task 9813:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 __kasan_slab_alloc+0x8e/0xc0 mm/kasan/common.c:467
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
 slab_alloc_node mm/slub.c:3220 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233
 kmem_cache_zalloc include/linux/slab.h:711 [inline]
 xfs_inode_item_init+0x2f/0xc0 fs/xfs/xfs_inode_item.c:675
 xfs_trans_ijoin+0xb6/0xe0 fs/xfs/libxfs/xfs_trans_inode.c:36
 xfs_init_new_inode+0xd8c/0x1100 fs/xfs/xfs_inode.c:918
 xfs_create+0x9b1/0x1370 fs/xfs/xfs_inode.c:1044
 xfs_generic_create+0x426/0xd70 fs/xfs/xfs_iops.c:197
 vfs_create+0x375/0x550 fs/namei.c:3092
 do_mknodat+0x3f5/0x690 fs/namei.c:3923
 __do_sys_mknod fs/namei.c:3956 [inline]
 __se_sys_mknod fs/namei.c:3954 [inline]
 __x64_sys_mknod+0x8a/0xa0 fs/namei.c:3954
 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+0x61/0xcb

Freed by task 9855:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1705 [inline]
 slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731
 slab_free mm/slub.c:3499 [inline]
 kmem_cache_free+0x91/0x1f0 mm/slub.c:3515
 xfs_inode_free_callback+0x1bd/0x230 fs/xfs/xfs_icache.c:142
 rcu_do_batch kernel/rcu/tree.c:2510 [inline]
 rcu_core+0xa15/0x1650 kernel/rcu/tree.c:2750
 __do_softirq+0x3b3/0x93a kernel/softirq.c:558

The buggy address belongs to the object at ffff88801c26f3c0
 which belongs to the cache xfs_ili of size 256
The buggy address is located 80 bytes inside of
 256-byte region [ffff88801c26f3c0, ffff88801c26f4c0)
The buggy address belongs to the page:
page:ffffea0000709bc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c26f
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea0001cc5d00 0000000200000002 ffff888146927780
raw: 0000000000000000 00000000800c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x112c50(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 4251, ts 920224211443, free_ts 917161647202
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159
 __alloc_pages+0x272/0x700 mm/page_alloc.c:5421
 alloc_slab_page mm/slub.c:1775 [inline]
 allocate_slab mm/slub.c:1912 [inline]
 new_slab+0xbb/0x4b0 mm/slub.c:1975
 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
 __slab_alloc mm/slub.c:3095 [inline]
 slab_alloc_node mm/slub.c:3186 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 kmem_cache_alloc+0x18e/0x280 mm/slub.c:3233
 kmem_cache_zalloc include/linux/slab.h:711 [inline]
 xfs_inode_item_init+0x2f/0xc0 fs/xfs/xfs_inode_item.c:675
 xfs_trans_ijoin+0xb6/0xe0 fs/xfs/libxfs/xfs_trans_inode.c:36
 xfs_init_new_inode+0xd8c/0x1100 fs/xfs/xfs_inode.c:918
 xfs_create+0x9b1/0x1370 fs/xfs/xfs_inode.c:1044
 xfs_generic_create+0x426/0xd70 fs/xfs/xfs_iops.c:197
 vfs_create+0x375/0x550 fs/namei.c:3092
 do_mknodat+0x3f5/0x690 fs/namei.c:3923
 __do_sys_mknod fs/namei.c:3956 [inline]
 __se_sys_mknod fs/namei.c:3954 [inline]
 __x64_sys_mknod+0x8a/0xa0 fs/namei.c:3954
 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+0x61/0xcb
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1340 [inline]
 free_pcp_prepare mm/page_alloc.c:1391 [inline]
 free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
 free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396
 do_slab_free mm/slub.c:3487 [inline]
 ___cache_free+0xe3/0x100 mm/slub.c:3506
 qlist_free_all+0x36/0x90 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x162/0x180 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
 slab_alloc_node mm/slub.c:3220 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233
 getname_flags+0xb8/0x4e0 fs/namei.c:138
 user_path_at_empty+0x2a/0x180 fs/namei.c:2852
 do_readlinkat+0x114/0x3a0 fs/stat.c:442
 __do_sys_readlink fs/stat.c:475 [inline]
 __se_sys_readlink fs/stat.c:472 [inline]
 __x64_sys_readlink+0x7b/0x90 fs/stat.c:472
 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+0x61/0xcb

Memory state around the buggy address:
 ffff88801c26f300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88801c26f380: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
>ffff88801c26f400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff88801c26f480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88801c26f500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Crashes (47):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/05/19 11:48 linux-5.15.y 9d6bde853685 3bb7af1d .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/05/17 08:11 linux-5.15.y b0ece631f84a 11c89444 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in xfs_iflush_cluster
2023/03/31 17:04 linux-5.15.y c957cbb87315 f325deb0 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2024/05/06 13:20 linux-5.15.y 284087d4f7d5 d884b519 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2024/05/04 04:29 linux-5.15.y 284087d4f7d5 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2024/05/04 02:25 linux-5.15.y 284087d4f7d5 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2024/05/03 11:27 linux-5.15.y 284087d4f7d5 dd26401e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2024/05/01 04:43 linux-5.15.y b925f60c6ee7 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2024/04/10 20:07 linux-5.15.y cdfd0a7f0139 4320ec32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2024/04/02 14:41 linux-5.15.y 9465fef4ae35 eb2966c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2024/04/13 07:23 linux-5.15.y cdfd0a7f0139 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in xfs_iflush_cluster
2024/04/08 00:51 linux-5.15.y 9465fef4ae35 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in xfs_iflush_cluster
2024/03/31 04:14 linux-5.15.y 9465fef4ae35 6baf5069 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in xfs_iflush_cluster
2024/03/31 04:11 linux-5.15.y 9465fef4ae35 6baf5069 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in xfs_iflush_cluster
2023/06/30 01:00 linux-5.15.y 4af60700a60c 01298212 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/06/29 20:15 linux-5.15.y 4af60700a60c 134ddc02 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/06/29 02:25 linux-5.15.y 4af60700a60c ca69c785 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/06/26 06:44 linux-5.15.y f67653019430 79782afc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/06/11 05:04 linux-5.15.y 7349e40704a0 49519f06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/06/07 23:10 linux-5.15.y d7af3e5ba454 058b3a5a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/06/07 19:09 linux-5.15.y d7af3e5ba454 058b3a5a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/06/07 19:05 linux-5.15.y d7af3e5ba454 058b3a5a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/06/05 14:05 linux-5.15.y d7af3e5ba454 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/05/19 07:42 linux-5.15.y 9d6bde853685 3bb7af1d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/05/19 06:57 linux-5.15.y 9d6bde853685 3bb7af1d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/05/09 09:04 linux-5.15.y 8a7f2a5c5aa1 c7a5e2a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/05/04 22:53 linux-5.15.y 8a7f2a5c5aa1 518a39a6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/05/03 21:28 linux-5.15.y 8a7f2a5c5aa1 b5918830 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/05/03 21:08 linux-5.15.y 8a7f2a5c5aa1 b5918830 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/05/03 11:10 linux-5.15.y 8a7f2a5c5aa1 48e0a81d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/05/03 10:57 linux-5.15.y 8a7f2a5c5aa1 48e0a81d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/04/17 16:43 linux-5.15.y 4fdad925aa1a c6ec7083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/04/10 21:35 linux-5.15.y d86dfc4d95cd 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/03/30 14:46 linux-5.15.y c957cbb87315 f325deb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/03/24 19:10 linux-5.15.y 115472395b0a 9700afae .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/03/23 23:23 linux-5.15.y 115472395b0a f94b4a29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/03/21 11:53 linux-5.15.y 8020ae3c051d 7939252e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/03/13 14:32 linux-5.15.y 2ddbd0f967b3 026e2200 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xfs_iflush_cluster
2023/05/16 18:14 linux-5.15.y b0ece631f84a 11c89444 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in xfs_iflush_cluster
2023/05/03 13:06 linux-5.15.y 8a7f2a5c5aa1 b5918830 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in xfs_iflush_cluster
2023/04/24 14:06 linux-5.15.y 3299fb36854f fdc18293 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in xfs_iflush_cluster
2023/04/23 08:52 linux-5.15.y 3299fb36854f 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in xfs_iflush_cluster
2023/04/11 21:49 linux-5.15.y d86dfc4d95cd 49faf98d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in xfs_iflush_cluster
2023/04/10 01:55 linux-5.15.y d86dfc4d95cd 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in xfs_iflush_cluster
2023/04/07 18:04 linux-5.15.y d86dfc4d95cd f7ba566d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in xfs_iflush_cluster
* Struck through repros no longer work on HEAD.