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KASAN: slab-out-of-bounds Read in reiserfs_xattr_get

Status: upstream: reported on 2021/04/13 05:55
Subsystems: reiserfs
[Documentation on labels]
Reported-by: syzbot+72ba979b6681c3369db4@syzkaller.appspotmail.com
First crash: 973d, last: 78d
▶ ▼ Discussions (2)
Title Replies (including bot) Last reply
[syzbot] Monthly reiserfs report (Apr 2023) 0 (1) 2023/04/27 10:49
[syzbot] KASAN: slab-out-of-bounds Read in reiserfs_xattr_get 1 (2) 2021/04/13 06:10

Sample crash report:
loop3: detected capacity change from 0 to 32768
==================================================================
BUG: KASAN: slab-out-of-bounds in reiserfs_xattr_get+0xe6/0x570 fs/reiserfs/xattr.c:676
Read of size 8 at addr ffff88802621d198 by task syz-executor.3/4643

CPU: 0 PID: 4643 Comm: syz-executor.3 Not tainted 6.6.0-rc1-syzkaller-00196-g57d88e8a5974 #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+0x1e7/0x2d0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0x163/0x540 mm/kasan/report.c:475
 kasan_report+0x175/0x1b0 mm/kasan/report.c:588
 reiserfs_xattr_get+0xe6/0x570 fs/reiserfs/xattr.c:676
 reiserfs_get_acl+0x7e/0x650 fs/reiserfs/xattr_acl.c:215
 __get_acl+0x288/0x470 fs/posix_acl.c:160
 check_acl+0x3a/0x150 fs/namei.c:309
 acl_permission_check fs/namei.c:354 [inline]
 generic_permission+0x362/0x550 fs/namei.c:407
 do_inode_permission fs/namei.c:461 [inline]
 inode_permission+0x233/0x460 fs/namei.c:528
 may_open+0x2d6/0x440 fs/namei.c:3267
 do_open fs/namei.c:3637 [inline]
 path_openat+0x265a/0x3180 fs/namei.c:3796
 do_filp_open+0x234/0x490 fs/namei.c:3823
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1422
 do_sys_open fs/open.c:1437 [inline]
 __do_sys_openat fs/open.c:1453 [inline]
 __se_sys_openat fs/open.c:1448 [inline]
 __x64_sys_openat+0x247/0x290 fs/open.c:1448
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f9b7d27b6e0
Code: 48 89 44 24 20 75 93 44 89 54 24 0c e8 09 82 02 00 44 8b 54 24 0c 89 da 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 38 44 89 c7 89 44 24 0c e8 5c 82 02 00 8b 44
RSP: 002b:00007f9b7e01ce70 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000010000 RCX: 00007f9b7d27b6e0
RDX: 0000000000010000 RSI: 0000000020000040 RDI: 00000000ffffff9c
RBP: 0000000020000040 R08: 0000000000000000 R09: 0000000000800000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000020000040
R13: 00007f9b7e01cf40 R14: 0000000000006197 R15: 0000000020000080
 </TASK>

Allocated by task 4526:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:198 [inline]
 __do_kmalloc_node mm/slab_common.c:1023 [inline]
 __kmalloc+0xb9/0x230 mm/slab_common.c:1036
 kmalloc_array include/linux/slab.h:636 [inline]
 kcalloc include/linux/slab.h:667 [inline]
 __list_lru_init+0xaa/0x5e0 mm/list_lru.c:571
 alloc_super+0x76b/0x920 fs/super.c:393
 sget+0x1fa/0x4d0 fs/super.c:886
 mount_bdev+0xef/0x300 fs/super.c:1609
 legacy_get_tree+0xef/0x190 fs/fs_context.c:638
 vfs_get_tree+0x8c/0x280 fs/super.c:1750
 do_new_mount+0x28f/0xae0 fs/namespace.c:3335
 do_mount fs/namespace.c:3675 [inline]
 __do_sys_mount fs/namespace.c:3884 [inline]
 __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 5061:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522
 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
 kasan_slab_free include/linux/kasan.h:164 [inline]
 slab_free_hook mm/slub.c:1800 [inline]
 slab_free_freelist_hook mm/slub.c:1826 [inline]
 slab_free mm/slub.c:3809 [inline]
 __kmem_cache_free+0x25f/0x3b0 mm/slub.c:3822
 list_lru_destroy+0x76c/0x840 mm/list_lru.c:598
 deactivate_locked_super+0xb8/0x110 fs/super.c:490
 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1254
 task_work_run+0x24a/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:285 [inline]
 syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff88802621d000
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 152 bytes to the right of
 allocated 256-byte region [ffff88802621d000, ffff88802621d100)

The buggy address belongs to the physical page:
page:ffffea0000988700 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2621c
head:ffffea0000988700 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888012841b40 ffffea000060f280 dead000000000006
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0x1d2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 2098, tgid 2098 (udevd), ts 1426148149311, free_ts 1406927750170
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1536
 prep_new_page mm/page_alloc.c:1543 [inline]
 get_page_from_freelist+0x31db/0x3360 mm/page_alloc.c:3170
 __alloc_pages+0x255/0x670 mm/page_alloc.c:4426
 alloc_slab_page+0x6a/0x160 mm/slub.c:1870
 allocate_slab mm/slub.c:2017 [inline]
 new_slab+0x84/0x2f0 mm/slub.c:2070
 ___slab_alloc+0xade/0x1100 mm/slub.c:3223
 __slab_alloc mm/slub.c:3322 [inline]
 __slab_alloc_node mm/slub.c:3375 [inline]
 slab_alloc_node mm/slub.c:3468 [inline]
 __kmem_cache_alloc_node+0x1af/0x270 mm/slub.c:3517
 kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1114
 kmalloc include/linux/slab.h:599 [inline]
 kzalloc include/linux/slab.h:720 [inline]
 smk_fetch+0x92/0x140 security/smack/smack_lsm.c:300
 smack_d_instantiate+0x74a/0xa50 security/smack/smack_lsm.c:3573
 security_d_instantiate+0x9b/0xf0 security/security.c:3799
 d_instantiate+0x55/0x90 fs/dcache.c:2033
 shmem_mknod+0x19e/0x1d0 mm/shmem.c:3234
 lookup_open fs/namei.c:3495 [inline]
 open_last_lookups fs/namei.c:3563 [inline]
 path_openat+0x13e7/0x3180 fs/namei.c:3793
 do_filp_open+0x234/0x490 fs/namei.c:3823
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1422
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1136 [inline]
 free_unref_page_prepare+0x8c3/0x9f0 mm/page_alloc.c:2312
 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2405
 __slab_free+0x2f6/0x390 mm/slub.c:3715
 qlist_free_all+0x22/0x60 mm/kasan/quarantine.c:185
 kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:292
 __kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:305
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook+0x6c/0x3b0 mm/slab.h:762
 slab_alloc_node mm/slub.c:3478 [inline]
 kmem_cache_alloc_node+0x148/0x330 mm/slub.c:3523
 __alloc_skb+0x181/0x420 net/core/skbuff.c:640
 alloc_skb include/linux/skbuff.h:1286 [inline]
 alloc_skb_with_frags+0xc3/0x780 net/core/skbuff.c:6313
 sock_alloc_send_pskb+0x919/0xa50 net/core/sock.c:2795
 unix_dgram_sendmsg+0x659/0x2070 net/unix/af_unix.c:1953
 sock_sendmsg_nosec net/socket.c:730 [inline]
 sock_sendmsg net/socket.c:753 [inline]
 __sys_sendto+0x484/0x640 net/socket.c:2177
 __do_sys_sendto net/socket.c:2189 [inline]
 __se_sys_sendto net/socket.c:2185 [inline]
 __x64_sys_sendto+0xde/0xf0 net/socket.c:2185
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffff88802621d080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802621d100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88802621d180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                            ^
 ffff88802621d200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802621d280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Crashes (106):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/09/16 15:39 upstream 57d88e8a5974 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/09/05 04:05 upstream 3f86ed6ec0b3 0b6286dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/08/03 19:42 upstream 7bafbd4027ae 74621247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/07/30 07:06 upstream 12214540ad87 92476829 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/07/22 11:55 upstream d192f5382581 27cbe77f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/07/12 21:24 upstream 3f01e9fed845 979d5fe2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/06/14 15:02 upstream b6dad5178cea d2ee9228 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/06/12 19:46 upstream fd37b884003c aaed0183 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/04/17 07:07 upstream 6a8f57ae2eb0 ec410564 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/04/09 22:24 upstream cdc9718d5e59 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/04/08 17:50 upstream aa318c48808c 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/04/07 02:39 upstream f2afccfefe7b 00ce4c67 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/04/05 14:28 upstream 76f598ba7d8e 8b834965 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/04/04 18:55 upstream 148341f0a2f5 928dd177 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/04/04 10:55 upstream 148341f0a2f5 928dd177 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/04/01 23:02 upstream 7b50567bdcad f325deb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/04/01 14:18 upstream 7b50567bdcad f325deb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/03/29 22:55 upstream ffe78bbd5121 f325deb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/03/28 18:52 upstream 3a93e40326c8 fc067f05 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/03/25 23:20 upstream 65aca32efdcb fbf0499a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/03/19 04:54 upstream 534293368afa 7939252e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/03/18 17:48 upstream 478a351ce0d6 7939252e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/03/15 09:58 upstream 6015b1aca1a2 18b58603 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/03/01 01:54 upstream e492250d5252 95aee97a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/02/28 12:02 upstream ae3419fbac84 95aee97a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/02/28 08:13 upstream 982818426a0f 95aee97a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/02/27 18:34 upstream f3a2439f20d9 9189cb53 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/02/27 08:37 upstream f3a2439f20d9 9189cb53 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/02/23 00:49 upstream 5b7c4cabbb65 9f1e2cb3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/02/12 17:06 upstream f339c2597ebb 93e26d60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/02/12 00:33 upstream d12aca5c0cee 93e26d60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/02/09 19:12 upstream 35674e787518 07980f9d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/02/09 13:04 upstream 0983f6bf2bfc 14a312c8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/01/29 08:13 upstream c96618275234 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/01/24 17:32 upstream 7bf70dbb1882 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/01/16 12:13 upstream 5dc4c995db9e a63719e7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2022/12/10 05:29 upstream 0d1409e4ff08 67be1ae7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2022/11/28 00:36 upstream faf68e3523c2 74a66371 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2022/11/22 05:41 upstream eb7081409f94 1c576c23 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2022/11/18 15:29 upstream 84368d882b96 5bb70014 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2022/11/02 01:56 upstream b229b6ca5abb 08977f5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2022/10/29 11:09 upstream b229b6ca5abb 899d812a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2022/10/27 22:07 upstream b229b6ca5abb 86777b7f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2022/10/18 19:32 upstream 55be6084c8e0 b31320fc .config console log report info [disk image] [vmlinux] ci-upstream-kasan-gce-smack-root KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2022/10/15 08:28 upstream 55be6084c8e0 67cb024c .config console log report info [disk image] [vmlinux] ci-upstream-kasan-gce-smack-root KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2022/10/13 07:20 upstream 55be6084c8e0 3f6b40a1 .config console log report info [disk image] [vmlinux] ci-upstream-kasan-gce-smack-root KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2021/04/08 01:29 upstream 3a22981230f9 6a81331a .config console log report info ci-upstream-kasan-gce-smack-root KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2021/04/03 19:38 upstream 57fbdb15ec42 6a81331a .config console log report info ci-upstream-kasan-gce-smack-root KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/08/12 03:54 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6f09e57d8cf6 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/08/09 00:53 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 86d7896480b0 3c27dfcd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2023/03/09 20:34 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci fe15c26ee26e f08b59ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: slab-out-of-bounds Read in reiserfs_xattr_get
2022/11/22 01:01 upstream eb7081409f94 1c576c23 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root KASAN: use-after-free Read in reiserfs_xattr_get
* Struck through repros no longer work on HEAD.