KASAN: use-after-free Read in release_metapage (3)

Status: auto-obsoleted due to no activity on 2025/02/20 12:24
Reported-by: syzbot+bc6b8ffd9f6f7f9507bd@syzkaller.appspotmail.com
First crash: 627d, last: 627d
▶ ▼ Similar bugs (11)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 KASAN: use-after-free Read in release_metapage (2) 19 3 557d 627d 0/3 auto-obsoleted due to no activity on 2025/05/01 23:31
linux-6.1 KASAN: use-after-free Read in release_metapage (5) 19 2 189d 189d 0/3 auto-obsoleted due to no activity on 2026/05/05 00:34
upstream KASAN: use-after-free Read in release_metapage jfs 19 syz, C error done 3221 7h48m 1308d 0/29 upstream: reported C repro on 2023/01/02 10:00
linux-6.1 KASAN: use-after-free Read in release_metapage 19 1 1046d 1046d 0/3 auto-obsoleted due to no activity on 2023/12/29 12:55
linux-5.15 BUG: spinlock bad magic in release_metapage origin:upstream 19 syz, C error 95 7d13h 685d 0/3 upstream: reported C repro on 2024/09/15 11:43
linux-4.14 KASAN: use-after-free Read in release_metapage 19 1 1362d 1362d 0/1 auto-obsoleted due to no activity on 2023/03/09 00:53
linux-6.1 KASAN: use-after-free Read in release_metapage (6) 19 syz, C 2 18d 49d 0/3 upstream: reported C repro on 2026/06/14 02:56
linux-6.1 KASAN: use-after-free Read in release_metapage (2) 19 1 822d 822d 0/3 auto-obsoleted due to no activity on 2024/08/10 05:44
linux-6.1 KASAN: use-after-free Read in release_metapage (4) 19 1 437d 437d 0/3 auto-obsoleted due to no activity on 2025/08/30 02:20
linux-5.15 KASAN: use-after-free Read in release_metapage 19 1 1025d 1025d 0/3 auto-obsoleted due to no activity on 2024/01/20 09:39
upstream BUG: spinlock bad magic in release_metapage prio:high jfs 15 syz, C inconclusive 866 22h19m 691d 0/29 upstream: reported C repro on 2024/09/10 08:16

Sample crash report:
JFS: metapage_get_blocks failed
==================================================================
BUG: KASAN: use-after-free in release_metapage+0x521/0x9b0 fs/jfs/jfs_metapage.c:750
Read of size 8 at addr ffff88805a78f190 by task syz.0.129/4867

CPU: 0 PID: 4867 Comm: syz.0.129 Not tainted 6.1.116-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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
 release_metapage+0x521/0x9b0 fs/jfs/jfs_metapage.c:750
 write_metapage fs/jfs/jfs_metapage.h:75 [inline]
 flush_metapage fs/jfs/jfs_metapage.h:81 [inline]
 ea_write+0x69f/0xe50 fs/jfs/xattr.c:280
 ea_put fs/jfs/xattr.c:621 [inline]
 __jfs_setxattr+0x8a5/0x11d0 fs/jfs/xattr.c:787
 __jfs_xattr_set+0xf5/0x180 fs/jfs/xattr.c:936
 __vfs_setxattr+0x3e7/0x420 fs/xattr.c:182
 __vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216
 vfs_setxattr+0x21d/0x420 fs/xattr.c:309
 do_setxattr fs/xattr.c:594 [inline]
 setxattr+0x250/0x2b0 fs/xattr.c:617
 path_setxattr+0x1bc/0x2a0 fs/xattr.c:636
 __do_sys_lsetxattr fs/xattr.c:659 [inline]
 __se_sys_lsetxattr fs/xattr.c:655 [inline]
 __x64_sys_lsetxattr+0xb4/0xd0 fs/xattr.c:655
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f5bd017e719
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5bd0fb5038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007f5bd0336130 RCX: 00007f5bd017e719
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000020000040
RBP: 00007f5bd01f1616 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f5bd0336130 R15: 00007ffc1cdfb8b8
 </TASK>

Allocated by task 4867:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 __kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737
 slab_alloc_node mm/slub.c:3398 [inline]
 slab_alloc mm/slub.c:3406 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3413 [inline]
 kmem_cache_alloc+0x10c/0x2d0 mm/slub.c:3422
 mempool_alloc+0x190/0x580 mm/mempool.c:392
 alloc_metapage fs/jfs/jfs_metapage.c:176 [inline]
 __get_metapage+0x58f/0x1040 fs/jfs/jfs_metapage.c:651
 ea_write+0x633/0xe50 fs/jfs/xattr.c:256
 ea_put fs/jfs/xattr.c:621 [inline]
 __jfs_setxattr+0x8a5/0x11d0 fs/jfs/xattr.c:787
 __jfs_xattr_set+0xf5/0x180 fs/jfs/xattr.c:936
 __vfs_setxattr+0x3e7/0x420 fs/xattr.c:182
 __vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216
 vfs_setxattr+0x21d/0x420 fs/xattr.c:309
 do_setxattr fs/xattr.c:594 [inline]
 setxattr+0x250/0x2b0 fs/xattr.c:617
 path_setxattr+0x1bc/0x2a0 fs/xattr.c:636
 __do_sys_lsetxattr fs/xattr.c:659 [inline]
 __se_sys_lsetxattr fs/xattr.c:655 [inline]
 __x64_sys_lsetxattr+0xb4/0xd0 fs/xattr.c:655
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Freed by task 4866:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1724 [inline]
 slab_free_freelist_hook mm/slub.c:1750 [inline]
 slab_free mm/slub.c:3661 [inline]
 kmem_cache_free+0x292/0x510 mm/slub.c:3683
 free_metapage fs/jfs/jfs_metapage.c:191 [inline]
 metapage_release_folio+0x5c8/0x730 fs/jfs/jfs_metapage.c:551
 folio_invalidate mm/truncate.c:158 [inline]
 truncate_cleanup_folio+0x252/0x660 mm/truncate.c:178
 truncate_inode_pages_range+0x2e6/0x1340 mm/truncate.c:368
 jfs_remount+0x360/0x6a0 fs/jfs/super.c:451
 reconfigure_super+0x43a/0x870 fs/super.c:977
 vfs_fsconfig_locked fs/fsopen.c:254 [inline]
 __do_sys_fsconfig fs/fsopen.c:439 [inline]
 __se_sys_fsconfig+0x98b/0xec0 fs/fsopen.c:314
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff88805a78f0f8
 which belongs to the cache jfs_mp of size 184
The buggy address is located 152 bytes inside of
 184-byte region [ffff88805a78f0f8, ffff88805a78f1b0)

The buggy address belongs to the physical page:
page:ffffea000169e3c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5a78f
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 0000000000000000 dead000000000122 ffff88801afa38c0
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x192800(GFP_NOWAIT|__GFP_NOWARN|__GFP_NORETRY|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 4867, tgid 4845 (syz.0.129), ts 115887542782, free_ts 115877822017
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2517
 prep_new_page mm/page_alloc.c:2524 [inline]
 get_page_from_freelist+0x3731/0x38d0 mm/page_alloc.c:4313
 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5589
 alloc_slab_page+0x6a/0x150 mm/slub.c:1794
 allocate_slab mm/slub.c:1939 [inline]
 new_slab+0x84/0x2d0 mm/slub.c:1992
 ___slab_alloc+0xc20/0x1270 mm/slub.c:3180
 __slab_alloc mm/slub.c:3279 [inline]
 slab_alloc_node mm/slub.c:3364 [inline]
 slab_alloc mm/slub.c:3406 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3413 [inline]
 kmem_cache_alloc+0x1a5/0x2d0 mm/slub.c:3422
 mempool_alloc+0x190/0x580 mm/mempool.c:392
 alloc_metapage fs/jfs/jfs_metapage.c:176 [inline]
 __get_metapage+0x58f/0x1040 fs/jfs/jfs_metapage.c:651
 ea_get+0x6f1/0x12b0 fs/jfs/xattr.c:549
 __jfs_setxattr+0xf8/0x11d0 fs/jfs/xattr.c:675
 __jfs_xattr_set+0xf5/0x180 fs/jfs/xattr.c:936
 __vfs_setxattr+0x3e7/0x420 fs/xattr.c:182
 __vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216
 vfs_setxattr+0x21d/0x420 fs/xattr.c:309
 do_setxattr fs/xattr.c:594 [inline]
 setxattr+0x250/0x2b0 fs/xattr.c:617
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1444 [inline]
 free_pcp_prepare mm/page_alloc.c:1494 [inline]
 free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3369
 free_unref_page+0x33/0x3e0 mm/page_alloc.c:3464
 free_slab mm/slub.c:2031 [inline]
 discard_slab mm/slub.c:2037 [inline]
 __unfreeze_partials+0x1b7/0x210 mm/slub.c:2586
 put_cpu_partial+0x17b/0x250 mm/slub.c:2662
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737
 slab_alloc_node mm/slub.c:3398 [inline]
 slab_alloc mm/slub.c:3406 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3413 [inline]
 kmem_cache_alloc+0x10c/0x2d0 mm/slub.c:3422
 getname_flags+0xb8/0x4f0 fs/namei.c:139
 do_sys_openat2+0xd2/0x4f0 fs/open.c:1312
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_openat fs/open.c:1350 [inline]
 __se_sys_openat fs/open.c:1345 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1345
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Memory state around the buggy address:
 ffff88805a78f080: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa
 ffff88805a78f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88805a78f180: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
                         ^
 ffff88805a78f200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88805a78f280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/11/12 12:24 linux-6.1.y d7039b844a1c 75bb1b32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Read in release_metapage
* Struck through repros no longer work on HEAD.