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KASAN: out-of-bounds Read in leaf_paste_entries

Status: upstream: reported C repro on 2023/03/18 05:48
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+c3004af592ed21fe7f7d@syzkaller.appspotmail.com
First crash: 193d, last: 4d12h
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2023/09/16 upstream (ToT) 57d88e8a5974 C [report] KASAN: out-of-bounds Read in leaf_paste_entries
▶ ▼ Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 KASAN: out-of-bounds Read in leaf_paste_entries reiserfs C error 73 208d 1046d 0/1 upstream: reported C repro on 2020/11/14 23:23
linux-5.15 KASAN: out-of-bounds Read in leaf_paste_entries origin:upstream C 29 5d00h 198d 0/3 upstream: reported C repro on 2023/03/13 09:08
upstream KASAN: out-of-bounds Read in leaf_paste_entries (2) reiserfs C inconclusive inconclusive 251 21h52m 653d 0/25 upstream: reported C repro on 2021/12/13 19:20
linux-4.14 KASAN: out-of-bounds Read in leaf_paste_entries reiserfs C error 13 275d 1087d 0/1 upstream: reported C repro on 2020/10/05 14:11
upstream KASAN: out-of-bounds Read in leaf_paste_entries reiserfs C inconclusive 8 718d 949d 22/25 fixed on 2021/11/10 00:50

Sample crash report:
REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30
REISERFS (device loop0): checking transaction log (loop0)
REISERFS (device loop0): Using r5 hash to sort names
==================================================================
BUG: KASAN: out-of-bounds in leaf_paste_entries+0x95f/0x13a0 fs/reiserfs/lbalance.c:1377
Read of size 18446744073709551585 at addr ffff888070bcbfa4 by task syz-executor371/3543

CPU: 1 PID: 3543 Comm: syz-executor371 Not tainted 6.1.54-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
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
 leaf_paste_entries+0x95f/0x13a0 fs/reiserfs/lbalance.c:1377
 balance_leaf_finish_node_paste_dirent fs/reiserfs/do_balan.c:1295 [inline]
 balance_leaf_finish_node_paste fs/reiserfs/do_balan.c:1321 [inline]
 balance_leaf_finish_node fs/reiserfs/do_balan.c:1364 [inline]
 balance_leaf+0xbd1e/0x12510 fs/reiserfs/do_balan.c:1452
 do_balance+0x309/0x8f0 fs/reiserfs/do_balan.c:1888
 reiserfs_paste_into_item+0x73b/0x880 fs/reiserfs/stree.c:2159
 reiserfs_add_entry+0x9b8/0xd70 fs/reiserfs/namei.c:567
 reiserfs_mkdir+0x6bc/0x8f0 fs/reiserfs/namei.c:862
 xattr_mkdir fs/reiserfs/xattr.c:76 [inline]
 create_privroot fs/reiserfs/xattr.c:882 [inline]
 reiserfs_xattr_init+0x348/0x730 fs/reiserfs/xattr.c:1005
 reiserfs_fill_super+0x2203/0x2620 fs/reiserfs/super.c:2175
 mount_bdev+0x2c9/0x3f0 fs/super.c:1432
 legacy_get_tree+0xeb/0x180 fs/fs_context.c:632
 vfs_get_tree+0x88/0x270 fs/super.c:1562
 do_new_mount+0x28b/0xae0 fs/namespace.c:3040
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3568
 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: 0033:0x7f7115a7a8fa
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007ffdcc444a88 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffdcc444aa0 RCX: 00007f7115a7a8fa
RDX: 0000000020001100 RSI: 0000000020000040 RDI: 00007ffdcc444aa0
RBP: 0000000000000004 R08: 00007ffdcc444ae0 R09: 0000000000001109
R10: 0000000000008080 R11: 0000000000000286 R12: 0000000000008080
R13: 00007ffdcc444ae0 R14: 0000000000000003 R15: 0000000000400000
 </TASK>

The buggy address belongs to the physical page:
page:ffffea0001c2f2c0 refcount:3 mapcount:0 mapping:ffff888148dc49f8 index:0x213 pfn:0x70bcb
memcg:ffff88813fe28000
aops:def_blk_aops ino:700000
flags: 0xfff18000002042(referenced|workingset|private|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff18000002042 0000000000000000 dead000000000122 ffff888148dc49f8
raw: 0000000000000213 ffff8880747a4658 00000003ffffffff ffff88813fe28000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Movable, gfp_mask 0x148c48(GFP_NOFS|__GFP_NOFAIL|__GFP_COMP|__GFP_HARDWALL|__GFP_MOVABLE), pid 3543, tgid 3543 (syz-executor371), ts 50860611984, free_ts 11189737842
 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
 __filemap_get_folio+0x711/0xe30 mm/filemap.c:1965
 pagecache_get_page+0x28/0x250 mm/folio-compat.c:110
 find_or_create_page include/linux/pagemap.h:613 [inline]
 grow_dev_page fs/buffer.c:946 [inline]
 grow_buffers fs/buffer.c:1011 [inline]
 __getblk_slow fs/buffer.c:1038 [inline]
 __getblk_gfp+0x211/0xa20 fs/buffer.c:1333
 sb_getblk include/linux/buffer_head.h:356 [inline]
 search_by_key+0x460/0x4b60 fs/reiserfs/stree.c:672
 reiserfs_read_locked_inode+0x23c/0x2950 fs/reiserfs/inode.c:1549
 reiserfs_fill_super+0x135f/0x2620 fs/reiserfs/super.c:2071
 mount_bdev+0x2c9/0x3f0 fs/super.c:1432
 legacy_get_tree+0xeb/0x180 fs/fs_context.c:632
 vfs_get_tree+0x88/0x270 fs/super.c:1562
 do_new_mount+0x28b/0xae0 fs/namespace.c:3040
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3568
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+0x98/0x570 mm/page_alloc.c:3484
 free_contig_range+0x9a/0x150 mm/page_alloc.c:9519
 destroy_args+0xfe/0x997 mm/debug_vm_pgtable.c:1031
 debug_vm_pgtable+0x416/0x46b mm/debug_vm_pgtable.c:1354
 do_one_initcall+0x265/0x8f0 init/main.c:1292
 do_initcall_level+0x157/0x207 init/main.c:1365
 do_initcalls+0x49/0x86 init/main.c:1381
 kernel_init_freeable+0x473/0x61f init/main.c:1620
 kernel_init+0x19/0x290 init/main.c:1508
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

Memory state around the buggy address:
 ffff888070bcbe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888070bcbf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888070bcbf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                               ^
 ffff888070bcc000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888070bcc080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================

Crashes (40):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/09/23 09:10 linux-6.1.y a356197db198 0b6a67ac .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan KASAN: out-of-bounds Read in leaf_paste_entries
2023/09/22 21:23 linux-6.1.y a356197db198 0b6a67ac .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan KASAN: out-of-bounds Read in leaf_paste_entries
2023/09/18 07:58 linux-6.1.y 09045dae0d90 0b6a67ac .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan KASAN: out-of-bounds Read in leaf_paste_entries
2023/09/17 04:12 linux-6.1.y 09045dae0d90 0b6a67ac .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan KASAN: out-of-bounds Read in leaf_paste_entries
2023/09/16 08:25 linux-6.1.y 09045dae0d90 0b6a67ac .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan KASAN: out-of-bounds Read in leaf_paste_entries
2023/05/07 07:00 linux-6.1.y ca48fc16c493 90c93c40 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/08/14 04:17 linux-6.1.y 1321ab403b38 39990d51 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan KASAN: out-of-bounds Read in leaf_paste_entries
2023/07/02 22:58 linux-6.1.y 0f4ac6b4c5f0 bfc47836 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan KASAN: out-of-bounds Read in leaf_paste_entries
2023/07/02 18:28 linux-6.1.y 0f4ac6b4c5f0 bfc47836 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan KASAN: out-of-bounds Read in leaf_paste_entries
2023/07/02 17:50 linux-6.1.y 0f4ac6b4c5f0 bfc47836 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan KASAN: out-of-bounds Read in leaf_paste_entries
2023/06/04 21:12 linux-6.1.y d2869ace6eeb a4ae4f42 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan KASAN: out-of-bounds Read in leaf_paste_entries
2023/07/02 06:59 linux-6.1.y 0f4ac6b4c5f0 bfc47836 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/06/26 08:07 linux-6.1.y e84a4e368abe 79782afc .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/06/22 21:15 linux-6.1.y e84a4e368abe 79782afc .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/06/22 14:15 linux-6.1.y e84a4e368abe 79782afc .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/06/21 12:48 linux-6.1.y ca87e77a2ef8 79782afc .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/06/08 14:54 linux-6.1.y 76ba310227d2 058b3a5a .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/05/29 18:55 linux-6.1.y a343b0dd87b4 cf184559 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/05/29 08:18 linux-6.1.y a343b0dd87b4 cf184559 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/05/29 04:16 linux-6.1.y a343b0dd87b4 cf184559 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/07/03 13:12 linux-6.1.y 0f4ac6b4c5f0 bfc47836 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: out-of-bounds Read in leaf_paste_entries
2023/04/23 00:21 linux-6.1.y f17b0ab65d17 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: out-of-bounds Read in leaf_paste_entries
2023/04/22 08:28 linux-6.1.y f17b0ab65d17 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: out-of-bounds Read in leaf_paste_entries
2023/04/22 00:20 linux-6.1.y f17b0ab65d17 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: out-of-bounds Read in leaf_paste_entries
2023/04/19 04:02 linux-6.1.y 0102425ac76b d931e9f0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: out-of-bounds Read in leaf_paste_entries
2023/04/11 04:17 linux-6.1.y 543aff194ab6 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: out-of-bounds Read in leaf_paste_entries
2023/03/18 08:24 linux-6.1.y 7eaef76fbc46 7939252e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: out-of-bounds Read in leaf_paste_entries
2023/04/19 13:01 linux-6.1.y 0102425ac76b 94b4184e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/04/16 20:00 linux-6.1.y 0102425ac76b ec410564 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/04/16 05:33 linux-6.1.y 0102425ac76b ec410564 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/04/12 17:32 linux-6.1.y 543aff194ab6 1a1596b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/04/12 06:19 linux-6.1.y 543aff194ab6 49faf98d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/04/11 14:16 linux-6.1.y 543aff194ab6 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/04/10 10:02 linux-6.1.y 543aff194ab6 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/04/10 07:02 linux-6.1.y 543aff194ab6 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/04/09 04:40 linux-6.1.y 543aff194ab6 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/04/05 07:44 linux-6.1.y 3b29299e5f60 831373d3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/03/30 09:58 linux-6.1.y e3a87a10f259 f325deb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/03/20 12:42 linux-6.1.y 7eaef76fbc46 7939252e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
2023/03/18 05:47 linux-6.1.y 7eaef76fbc46 7939252e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 KASAN: out-of-bounds Read in leaf_paste_entries
* Struck through repros no longer work on HEAD.