[v5.15] KASAN: use-after-free Read in hfsplus_btree_open (2)
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syzbot
Mar 7, 2025, 11:05:29 AM3/7/25
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: c16c81c81336 Linux 5.15.178
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=168e64b7980000
kernel config: https://syzkaller.appspot.com/x/.config?x=d302c69e93fb6774
dashboard link: https://syzkaller.appspot.com/bug?extid=4cb8a34aaa8cb484c751
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/267e46ee7273/disk-c16c81c8.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/944e289206cf/vmlinux-c16c81c8.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f8cadf62458e/bzImage-c16c81c8.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4cb8a3...@syzkaller.appspotmail.com
loop0: detected capacity change from 0 to 1024
==================================================================
BUG: KASAN: use-after-free in hfsplus_btree_open+0xb3e/0x11e0 fs/hfsplus/btree.c:155
Read of size 4 at addr ffff88805f4e9154 by task syz.0.449/5542
CPU: 1 PID: 5542 Comm: syz.0.449 Not tainted 5.15.178-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 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
hfsplus_btree_open+0xb3e/0x11e0 fs/hfsplus/btree.c:155
hfsplus_fill_super+0xaba/0x1c90 fs/hfsplus/super.c:473
mount_bdev+0x2c9/0x3f0 fs/super.c:1400
legacy_get_tree+0xeb/0x180 fs/fs_context.c:611
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x2ba/0xb40 fs/namespace.c:3012
do_mount fs/namespace.c:3355 [inline]
__do_sys_mount fs/namespace.c:3563 [inline]
__se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3540
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f5723e0690a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5721c6de68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f5721c6def0 RCX: 00007f5723e0690a
RDX: 0000400000000500 RSI: 0000400000000640 RDI: 00007f5721c6deb0
RBP: 0000400000000500 R08: 00007f5721c6def0 R09: 0000000000200000
R10: 0000000000200000 R11: 0000000000000246 R12: 0000400000000640
R13: 00007f5721c6deb0 R14: 00000000000005e2 R15: 0000400000000680
</TASK>
Allocated by task 4305:
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
f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2642 [inline]
f2fs_alloc_inode+0x15d/0x5b0 fs/f2fs/super.c:1383
alloc_inode fs/inode.c:236 [inline]
iget_locked+0x194/0x7f0 fs/inode.c:1283
f2fs_iget+0x52/0x4b30 fs/f2fs/inode.c:498
f2fs_fill_super+0x6492/0x8350 fs/f2fs/super.c:4259
mount_bdev+0x2c9/0x3f0 fs/super.c:1400
legacy_get_tree+0xeb/0x180 fs/fs_context.c:611
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x2ba/0xb40 fs/namespace.c:3012
do_mount fs/namespace.c:3355 [inline]
__do_sys_mount fs/namespace.c:3563 [inline]
__se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3540
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
Last potentially related work creation:
kasan_save_stack+0x36/0x60 mm/kasan/common.c:38
kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:348
__call_rcu kernel/rcu/tree.c:3007 [inline]
call_rcu+0x1c4/0xa70 kernel/rcu/tree.c:3087
destroy_inode fs/inode.c:291 [inline]
evict+0x87d/0x930 fs/inode.c:637
f2fs_fill_super+0x6915/0x8350 fs/f2fs/super.c:4442
mount_bdev+0x2c9/0x3f0 fs/super.c:1400
legacy_get_tree+0xeb/0x180 fs/fs_context.c:611
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x2ba/0xb40 fs/namespace.c:3012
do_mount fs/namespace.c:3355 [inline]
__do_sys_mount fs/namespace.c:3563 [inline]
__se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3540
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
The buggy address belongs to the object at ffff88805f4e8980
which belongs to the cache f2fs_inode_cache of size 2304
The buggy address is located 2004 bytes inside of
2304-byte region [ffff88805f4e8980, ffff88805f4e9280)
The buggy address belongs to the page:
page:ffffea00017d3a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805f4ecc00 pfn:0x5f4e8
head:ffffea00017d3a00 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff8880238c5301
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000122 ffff88801e4c28c0
raw: ffff88805f4ecc00 00000000800d0004 00000001ffffffff ffff8880238c5301
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 4305, ts 68989049153, free_ts 18093946815
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x3b78/0x3d40 mm/page_alloc.c:4192
__alloc_pages+0x272/0x700 mm/page_alloc.c:5465
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
f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2642 [inline]
f2fs_alloc_inode+0x15d/0x5b0 fs/f2fs/super.c:1383
alloc_inode fs/inode.c:236 [inline]
iget_locked+0x194/0x7f0 fs/inode.c:1283
f2fs_iget+0x52/0x4b30 fs/f2fs/inode.c:498
f2fs_fill_super+0x4f06/0x8350 fs/f2fs/super.c:4151
mount_bdev+0x2c9/0x3f0 fs/super.c:1400
legacy_get_tree+0xeb/0x180 fs/fs_context.c:611
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x2ba/0xb40 fs/namespace.c:3012
do_mount fs/namespace.c:3355 [inline]
__do_sys_mount fs/namespace.c:3563 [inline]
__se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3540
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
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
free_contig_range+0x95/0xf0 mm/page_alloc.c:9384
destroy_args+0xfe/0x980 mm/debug_vm_pgtable.c:1018
debug_vm_pgtable+0x40d/0x470 mm/debug_vm_pgtable.c:1331
do_one_initcall+0x22b/0x7a0 init/main.c:1302
do_initcall_level+0x157/0x210 init/main.c:1375
do_initcalls+0x49/0x90 init/main.c:1391
kernel_init_freeable+0x425/0x5c0 init/main.c:1615
kernel_init+0x19/0x290 init/main.c:1506
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Memory state around the buggy address:
ffff88805f4e9000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88805f4e9080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88805f4e9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88805f4e9180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88805f4e9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: c16c81c81336 Linux 5.15.178
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=168e64b7980000
kernel config: https://syzkaller.appspot.com/x/.config?x=d302c69e93fb6774
dashboard link: https://syzkaller.appspot.com/bug?extid=4cb8a34aaa8cb484c751
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/267e46ee7273/disk-c16c81c8.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/944e289206cf/vmlinux-c16c81c8.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f8cadf62458e/bzImage-c16c81c8.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4cb8a3...@syzkaller.appspotmail.com
loop0: detected capacity change from 0 to 1024
==================================================================
BUG: KASAN: use-after-free in hfsplus_btree_open+0xb3e/0x11e0 fs/hfsplus/btree.c:155
Read of size 4 at addr ffff88805f4e9154 by task syz.0.449/5542
CPU: 1 PID: 5542 Comm: syz.0.449 Not tainted 5.15.178-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 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
hfsplus_btree_open+0xb3e/0x11e0 fs/hfsplus/btree.c:155
hfsplus_fill_super+0xaba/0x1c90 fs/hfsplus/super.c:473
mount_bdev+0x2c9/0x3f0 fs/super.c:1400
legacy_get_tree+0xeb/0x180 fs/fs_context.c:611
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x2ba/0xb40 fs/namespace.c:3012
do_mount fs/namespace.c:3355 [inline]
__do_sys_mount fs/namespace.c:3563 [inline]
__se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3540
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f5723e0690a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5721c6de68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f5721c6def0 RCX: 00007f5723e0690a
RDX: 0000400000000500 RSI: 0000400000000640 RDI: 00007f5721c6deb0
RBP: 0000400000000500 R08: 00007f5721c6def0 R09: 0000000000200000
R10: 0000000000200000 R11: 0000000000000246 R12: 0000400000000640
R13: 00007f5721c6deb0 R14: 00000000000005e2 R15: 0000400000000680
</TASK>
Allocated by task 4305:
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
f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2642 [inline]
f2fs_alloc_inode+0x15d/0x5b0 fs/f2fs/super.c:1383
alloc_inode fs/inode.c:236 [inline]
iget_locked+0x194/0x7f0 fs/inode.c:1283
f2fs_iget+0x52/0x4b30 fs/f2fs/inode.c:498
f2fs_fill_super+0x6492/0x8350 fs/f2fs/super.c:4259
mount_bdev+0x2c9/0x3f0 fs/super.c:1400
legacy_get_tree+0xeb/0x180 fs/fs_context.c:611
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x2ba/0xb40 fs/namespace.c:3012
do_mount fs/namespace.c:3355 [inline]
__do_sys_mount fs/namespace.c:3563 [inline]
__se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3540
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
Last potentially related work creation:
kasan_save_stack+0x36/0x60 mm/kasan/common.c:38
kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:348
__call_rcu kernel/rcu/tree.c:3007 [inline]
call_rcu+0x1c4/0xa70 kernel/rcu/tree.c:3087
destroy_inode fs/inode.c:291 [inline]
evict+0x87d/0x930 fs/inode.c:637
f2fs_fill_super+0x6915/0x8350 fs/f2fs/super.c:4442
mount_bdev+0x2c9/0x3f0 fs/super.c:1400
legacy_get_tree+0xeb/0x180 fs/fs_context.c:611
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x2ba/0xb40 fs/namespace.c:3012
do_mount fs/namespace.c:3355 [inline]
__do_sys_mount fs/namespace.c:3563 [inline]
__se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3540
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
The buggy address belongs to the object at ffff88805f4e8980
which belongs to the cache f2fs_inode_cache of size 2304
The buggy address is located 2004 bytes inside of
2304-byte region [ffff88805f4e8980, ffff88805f4e9280)
The buggy address belongs to the page:
page:ffffea00017d3a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805f4ecc00 pfn:0x5f4e8
head:ffffea00017d3a00 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff8880238c5301
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000122 ffff88801e4c28c0
raw: ffff88805f4ecc00 00000000800d0004 00000001ffffffff ffff8880238c5301
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 4305, ts 68989049153, free_ts 18093946815
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x3b78/0x3d40 mm/page_alloc.c:4192
__alloc_pages+0x272/0x700 mm/page_alloc.c:5465
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
f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2642 [inline]
f2fs_alloc_inode+0x15d/0x5b0 fs/f2fs/super.c:1383
alloc_inode fs/inode.c:236 [inline]
iget_locked+0x194/0x7f0 fs/inode.c:1283
f2fs_iget+0x52/0x4b30 fs/f2fs/inode.c:498
f2fs_fill_super+0x4f06/0x8350 fs/f2fs/super.c:4151
mount_bdev+0x2c9/0x3f0 fs/super.c:1400
legacy_get_tree+0xeb/0x180 fs/fs_context.c:611
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x2ba/0xb40 fs/namespace.c:3012
do_mount fs/namespace.c:3355 [inline]
__do_sys_mount fs/namespace.c:3563 [inline]
__se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3540
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
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
free_contig_range+0x95/0xf0 mm/page_alloc.c:9384
destroy_args+0xfe/0x980 mm/debug_vm_pgtable.c:1018
debug_vm_pgtable+0x40d/0x470 mm/debug_vm_pgtable.c:1331
do_one_initcall+0x22b/0x7a0 init/main.c:1302
do_initcall_level+0x157/0x210 init/main.c:1375
do_initcalls+0x49/0x90 init/main.c:1391
kernel_init_freeable+0x425/0x5c0 init/main.c:1615
kernel_init+0x19/0x290 init/main.c:1506
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Memory state around the buggy address:
ffff88805f4e9000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88805f4e9080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88805f4e9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88805f4e9180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88805f4e9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot
Aug 24, 2025, 7:57:15 AM8/24/25
to syzkaller...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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