[moderation] [btrfs?] KASAN: slab-use-after-free Read in add_ra_bio_pages (2)
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syzbot
Dec 14, 2023, 3:13:27 PM12/14/23
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: c527f5606aa5 Merge tag 'powerpc-6.7-4' of git://git.kernel..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17bc9396e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=70dcde26e6b912e5
dashboard link: https://syzkaller.appspot.com/bug?extid=e91486f74874aaef3961
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
CC: [c...@fb.com dst...@suse.com jo...@toxicpanda.com linux...@vger.kernel.org linux-...@vger.kernel.org linux-...@vger.kernel.org]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/92e521f7455b/disk-c527f560.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a3e19bad400b/vmlinux-c527f560.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4ce355c7f42b/bzImage-c527f560.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e91486...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in add_ra_bio_pages+0x788/0xc10 fs/btrfs/compression.c:435
Read of size 8 at addr ffff888078db4018 by task syz-executor.2/17406
CPU: 1 PID: 17406 Comm: syz-executor.2 Not tainted 6.7.0-rc4-syzkaller-00424-gc527f5606aa5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
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+0x142/0x170 mm/kasan/report.c:588
add_ra_bio_pages+0x788/0xc10 fs/btrfs/compression.c:435
btrfs_submit_compressed_read+0x655/0xa40 fs/btrfs/compression.c:522
submit_one_bio+0xfc/0x1c0 fs/btrfs/extent_io.c:119
extent_readahead+0x1323/0x1470 fs/btrfs/extent_io.c:2254
read_pages+0x183/0x830 mm/readahead.c:160
page_cache_ra_unbounded+0x186/0x7c0 mm/readahead.c:241
page_cache_sync_readahead include/linux/pagemap.h:1283 [inline]
filemap_get_pages+0x49c/0x2080 mm/filemap.c:2497
filemap_read+0x41b/0xec0 mm/filemap.c:2593
call_read_iter include/linux/fs.h:2014 [inline]
copy_splice_read+0x4c9/0x9c0 fs/splice.c:364
splice_direct_to_actor+0x2c4/0x9e0 fs/splice.c:1069
do_splice_direct+0x2ac/0x3f0 fs/splice.c:1194
do_sendfile+0x62c/0x1000 fs/read_write.c:1254
__do_sys_sendfile64 fs/read_write.c:1322 [inline]
__se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1308
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f4bae47cba9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4baf1490c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f4bae59bf80 RCX: 00007f4bae47cba9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000004
RBP: 00007f4bae4c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f4bae59bf80 R15: 00007ffc24548f38
</TASK>
Allocated by task 42:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6c/0x3c0 mm/slab.h:763
slab_alloc_node mm/slub.c:3478 [inline]
slab_alloc mm/slub.c:3486 [inline]
__kmem_cache_alloc_lru mm/slub.c:3493 [inline]
kmem_cache_alloc+0x19e/0x2b0 mm/slub.c:3502
kmem_cache_zalloc include/linux/slab.h:711 [inline]
alloc_extent_map+0x21/0x130 fs/btrfs/extent_map.c:49
create_io_em fs/btrfs/inode.c:7249 [inline]
submit_one_async_extent fs/btrfs/inode.c:1148 [inline]
submit_compressed_extents+0x8bf/0x1a50 fs/btrfs/inode.c:1604
run_ordered_work fs/btrfs/async-thread.c:246 [inline]
btrfs_work_helper+0x542/0xbe0 fs/btrfs/async-thread.c:325
process_one_work kernel/workqueue.c:2627 [inline]
process_scheduled_works+0x90f/0x1420 kernel/workqueue.c:2700
worker_thread+0xa5f/0x1000 kernel/workqueue.c:2781
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Freed by task 17406:
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+0x299/0x470 mm/slub.c:3831
add_ra_bio_pages+0x6ed/0xc10 fs/btrfs/compression.c:423
btrfs_submit_compressed_read+0x655/0xa40 fs/btrfs/compression.c:522
submit_one_bio+0xfc/0x1c0 fs/btrfs/extent_io.c:119
extent_readahead+0x1323/0x1470 fs/btrfs/extent_io.c:2254
read_pages+0x183/0x830 mm/readahead.c:160
page_cache_ra_unbounded+0x186/0x7c0 mm/readahead.c:241
page_cache_sync_readahead include/linux/pagemap.h:1283 [inline]
filemap_get_pages+0x49c/0x2080 mm/filemap.c:2497
filemap_read+0x41b/0xec0 mm/filemap.c:2593
call_read_iter include/linux/fs.h:2014 [inline]
copy_splice_read+0x4c9/0x9c0 fs/splice.c:364
splice_direct_to_actor+0x2c4/0x9e0 fs/splice.c:1069
do_splice_direct+0x2ac/0x3f0 fs/splice.c:1194
do_sendfile+0x62c/0x1000 fs/read_write.c:1254
__do_sys_sendfile64 fs/read_write.c:1322 [inline]
__se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1308
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
The buggy address belongs to the object at ffff888078db4000
which belongs to the cache btrfs_extent_map of size 144
The buggy address is located 24 bytes inside of
freed 144-byte region [ffff888078db4000, ffff888078db4090)
The buggy address belongs to the physical page:
page:ffffea0001e36d00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x78db4
flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff88814c553500 ffffea000051b280 0000000000000002
raw: 0000000000000000 0000000080130013 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 0x112c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 10284, tgid 10227 (syz-executor.2), ts 368375511382, free_ts 368351738690
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1537
prep_new_page mm/page_alloc.c:1544 [inline]
get_page_from_freelist+0x33ea/0x3570 mm/page_alloc.c:3312
__alloc_pages+0x255/0x680 mm/page_alloc.c:4568
alloc_pages_mpol+0x3de/0x640 mm/mempolicy.c:2133
alloc_slab_page+0x6a/0x170 mm/slub.c:1870
allocate_slab mm/slub.c:2017 [inline]
new_slab+0x84/0x2f0 mm/slub.c:2070
___slab_alloc+0xc8a/0x1330 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]
slab_alloc mm/slub.c:3486 [inline]
__kmem_cache_alloc_lru mm/slub.c:3493 [inline]
kmem_cache_alloc+0x1e9/0x2b0 mm/slub.c:3502
kmem_cache_zalloc include/linux/slab.h:711 [inline]
alloc_extent_map fs/btrfs/extent_map.c:49 [inline]
btrfs_drop_extent_map_range+0x32c/0x15e0 fs/btrfs/extent_map.c:737
btrfs_replace_extent_map_range+0xfc/0x170 fs/btrfs/extent_map.c:954
btrfs_cont_expand+0x803/0xce0 fs/btrfs/inode.c:4923
btrfs_write_check+0x447/0x500 fs/btrfs/file.c:1171
btrfs_direct_write fs/btrfs/file.c:1501 [inline]
btrfs_do_write_iter+0x5fe/0x1190 fs/btrfs/file.c:1684
do_iter_readv_writev+0x330/0x4a0
do_iter_write+0x1f6/0x8d0 fs/read_write.c:860
iter_file_splice_write+0x86d/0x1010 fs/splice.c:736
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1137 [inline]
free_unref_page_prepare+0x931/0xa60 mm/page_alloc.c:2347
free_unref_page_list+0x5a0/0x840 mm/page_alloc.c:2533
release_pages+0x2117/0x2400 mm/swap.c:1042
__folio_batch_release+0x84/0x100 mm/swap.c:1062
folio_batch_release include/linux/pagevec.h:83 [inline]
invalidate_inode_pages2_range+0xd9a/0x1040 mm/truncate.c:679
close_ctree+0x65c/0xd40 fs/btrfs/disk-io.c:4373
generic_shutdown_super+0x13a/0x2c0 fs/super.c:696
kill_anon_super+0x3b/0x70 fs/super.c:1295
btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2100
deactivate_locked_super+0xc1/0x130 fs/super.c:484
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1256
task_work_run+0x24a/0x300 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb1/0x150 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x69/0x2a0 kernel/entry/common.c:296
do_syscall_64+0x52/0x110 arch/x86/entry/common.c:89
Memory state around the buggy address:
ffff888078db3f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888078db3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888078db4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888078db4080: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb
ffff888078db4100: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
==================================================================
---
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:
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(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: c527f5606aa5 Merge tag 'powerpc-6.7-4' of git://git.kernel..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17bc9396e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=70dcde26e6b912e5
dashboard link: https://syzkaller.appspot.com/bug?extid=e91486f74874aaef3961
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
CC: [c...@fb.com dst...@suse.com jo...@toxicpanda.com linux...@vger.kernel.org linux-...@vger.kernel.org linux-...@vger.kernel.org]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/92e521f7455b/disk-c527f560.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a3e19bad400b/vmlinux-c527f560.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4ce355c7f42b/bzImage-c527f560.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e91486...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in add_ra_bio_pages+0x788/0xc10 fs/btrfs/compression.c:435
Read of size 8 at addr ffff888078db4018 by task syz-executor.2/17406
CPU: 1 PID: 17406 Comm: syz-executor.2 Not tainted 6.7.0-rc4-syzkaller-00424-gc527f5606aa5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
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+0x142/0x170 mm/kasan/report.c:588
add_ra_bio_pages+0x788/0xc10 fs/btrfs/compression.c:435
btrfs_submit_compressed_read+0x655/0xa40 fs/btrfs/compression.c:522
submit_one_bio+0xfc/0x1c0 fs/btrfs/extent_io.c:119
extent_readahead+0x1323/0x1470 fs/btrfs/extent_io.c:2254
read_pages+0x183/0x830 mm/readahead.c:160
page_cache_ra_unbounded+0x186/0x7c0 mm/readahead.c:241
page_cache_sync_readahead include/linux/pagemap.h:1283 [inline]
filemap_get_pages+0x49c/0x2080 mm/filemap.c:2497
filemap_read+0x41b/0xec0 mm/filemap.c:2593
call_read_iter include/linux/fs.h:2014 [inline]
copy_splice_read+0x4c9/0x9c0 fs/splice.c:364
splice_direct_to_actor+0x2c4/0x9e0 fs/splice.c:1069
do_splice_direct+0x2ac/0x3f0 fs/splice.c:1194
do_sendfile+0x62c/0x1000 fs/read_write.c:1254
__do_sys_sendfile64 fs/read_write.c:1322 [inline]
__se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1308
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f4bae47cba9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4baf1490c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f4bae59bf80 RCX: 00007f4bae47cba9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000004
RBP: 00007f4bae4c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f4bae59bf80 R15: 00007ffc24548f38
</TASK>
Allocated by task 42:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6c/0x3c0 mm/slab.h:763
slab_alloc_node mm/slub.c:3478 [inline]
slab_alloc mm/slub.c:3486 [inline]
__kmem_cache_alloc_lru mm/slub.c:3493 [inline]
kmem_cache_alloc+0x19e/0x2b0 mm/slub.c:3502
kmem_cache_zalloc include/linux/slab.h:711 [inline]
alloc_extent_map+0x21/0x130 fs/btrfs/extent_map.c:49
create_io_em fs/btrfs/inode.c:7249 [inline]
submit_one_async_extent fs/btrfs/inode.c:1148 [inline]
submit_compressed_extents+0x8bf/0x1a50 fs/btrfs/inode.c:1604
run_ordered_work fs/btrfs/async-thread.c:246 [inline]
btrfs_work_helper+0x542/0xbe0 fs/btrfs/async-thread.c:325
process_one_work kernel/workqueue.c:2627 [inline]
process_scheduled_works+0x90f/0x1420 kernel/workqueue.c:2700
worker_thread+0xa5f/0x1000 kernel/workqueue.c:2781
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Freed by task 17406:
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+0x299/0x470 mm/slub.c:3831
add_ra_bio_pages+0x6ed/0xc10 fs/btrfs/compression.c:423
btrfs_submit_compressed_read+0x655/0xa40 fs/btrfs/compression.c:522
submit_one_bio+0xfc/0x1c0 fs/btrfs/extent_io.c:119
extent_readahead+0x1323/0x1470 fs/btrfs/extent_io.c:2254
read_pages+0x183/0x830 mm/readahead.c:160
page_cache_ra_unbounded+0x186/0x7c0 mm/readahead.c:241
page_cache_sync_readahead include/linux/pagemap.h:1283 [inline]
filemap_get_pages+0x49c/0x2080 mm/filemap.c:2497
filemap_read+0x41b/0xec0 mm/filemap.c:2593
call_read_iter include/linux/fs.h:2014 [inline]
copy_splice_read+0x4c9/0x9c0 fs/splice.c:364
splice_direct_to_actor+0x2c4/0x9e0 fs/splice.c:1069
do_splice_direct+0x2ac/0x3f0 fs/splice.c:1194
do_sendfile+0x62c/0x1000 fs/read_write.c:1254
__do_sys_sendfile64 fs/read_write.c:1322 [inline]
__se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1308
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
The buggy address belongs to the object at ffff888078db4000
which belongs to the cache btrfs_extent_map of size 144
The buggy address is located 24 bytes inside of
freed 144-byte region [ffff888078db4000, ffff888078db4090)
The buggy address belongs to the physical page:
page:ffffea0001e36d00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x78db4
flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff88814c553500 ffffea000051b280 0000000000000002
raw: 0000000000000000 0000000080130013 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 0x112c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 10284, tgid 10227 (syz-executor.2), ts 368375511382, free_ts 368351738690
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1537
prep_new_page mm/page_alloc.c:1544 [inline]
get_page_from_freelist+0x33ea/0x3570 mm/page_alloc.c:3312
__alloc_pages+0x255/0x680 mm/page_alloc.c:4568
alloc_pages_mpol+0x3de/0x640 mm/mempolicy.c:2133
alloc_slab_page+0x6a/0x170 mm/slub.c:1870
allocate_slab mm/slub.c:2017 [inline]
new_slab+0x84/0x2f0 mm/slub.c:2070
___slab_alloc+0xc8a/0x1330 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]
slab_alloc mm/slub.c:3486 [inline]
__kmem_cache_alloc_lru mm/slub.c:3493 [inline]
kmem_cache_alloc+0x1e9/0x2b0 mm/slub.c:3502
kmem_cache_zalloc include/linux/slab.h:711 [inline]
alloc_extent_map fs/btrfs/extent_map.c:49 [inline]
btrfs_drop_extent_map_range+0x32c/0x15e0 fs/btrfs/extent_map.c:737
btrfs_replace_extent_map_range+0xfc/0x170 fs/btrfs/extent_map.c:954
btrfs_cont_expand+0x803/0xce0 fs/btrfs/inode.c:4923
btrfs_write_check+0x447/0x500 fs/btrfs/file.c:1171
btrfs_direct_write fs/btrfs/file.c:1501 [inline]
btrfs_do_write_iter+0x5fe/0x1190 fs/btrfs/file.c:1684
do_iter_readv_writev+0x330/0x4a0
do_iter_write+0x1f6/0x8d0 fs/read_write.c:860
iter_file_splice_write+0x86d/0x1010 fs/splice.c:736
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1137 [inline]
free_unref_page_prepare+0x931/0xa60 mm/page_alloc.c:2347
free_unref_page_list+0x5a0/0x840 mm/page_alloc.c:2533
release_pages+0x2117/0x2400 mm/swap.c:1042
__folio_batch_release+0x84/0x100 mm/swap.c:1062
folio_batch_release include/linux/pagevec.h:83 [inline]
invalidate_inode_pages2_range+0xd9a/0x1040 mm/truncate.c:679
close_ctree+0x65c/0xd40 fs/btrfs/disk-io.c:4373
generic_shutdown_super+0x13a/0x2c0 fs/super.c:696
kill_anon_super+0x3b/0x70 fs/super.c:1295
btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2100
deactivate_locked_super+0xc1/0x130 fs/super.c:484
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1256
task_work_run+0x24a/0x300 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb1/0x150 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x69/0x2a0 kernel/entry/common.c:296
do_syscall_64+0x52/0x110 arch/x86/entry/common.c:89
Memory state around the buggy address:
ffff888078db3f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888078db3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888078db4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888078db4080: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb
ffff888078db4100: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
==================================================================
---
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syzbot
Mar 9, 2024, 3:05:20 PMMar 9
to syzkaller-upst...@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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