[btrfs?] KASAN: slab-use-after-free Read in add_ra_bio_pages
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syzbot
May 3, 2023, 1:35:46 PM5/3/23
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 89d77f71f493 Merge tag 'riscv-for-linus-6.4-mw1' of git://..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16edf50c280000
kernel config: https://syzkaller.appspot.com/x/.config?x=4bd54d5f2354efc3
dashboard link: https://syzkaller.appspot.com/bug?extid=f06304d8e679318dc253
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
CC: [c...@fb.com dst...@suse.com jo...@toxicpanda.com linux...@vger.kernel.org linux-...@vger.kernel.org linux-...@vger.kernel.org terr...@fb.com]
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f06304...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in add_ra_bio_pages.isra.0+0xdb0/0xe30 fs/btrfs/compression.c:443
Read of size 8 at addr ffff8880002b4398 by task syz-executor.1/5252
CPU: 0 PID: 5252 Comm: syz-executor.1 Not tainted 6.3.0-syzkaller-11025-g89d77f71f493 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351
print_report mm/kasan/report.c:462 [inline]
kasan_report+0x11c/0x130 mm/kasan/report.c:572
add_ra_bio_pages.isra.0+0xdb0/0xe30 fs/btrfs/compression.c:443
btrfs_submit_compressed_read+0x58f/0xa40 fs/btrfs/compression.c:530
submit_one_bio+0x228/0x3f0 fs/btrfs/extent_io.c:151
extent_readahead+0x11c4/0x1440 fs/btrfs/extent_io.c:2623
read_pages+0x1a2/0xd40 mm/readahead.c:161
page_cache_ra_unbounded+0x2f7/0x5e0 mm/readahead.c:242
do_page_cache_ra mm/readahead.c:300 [inline]
page_cache_ra_order+0x6ec/0xa00 mm/readahead.c:560
do_sync_mmap_readahead mm/filemap.c:3187 [inline]
filemap_fault+0x140a/0x24a0 mm/filemap.c:3279
__do_fault+0x107/0x600 mm/memory.c:4176
do_read_fault mm/memory.c:4530 [inline]
do_fault mm/memory.c:4659 [inline]
do_pte_missing mm/memory.c:3647 [inline]
handle_pte_fault mm/memory.c:4947 [inline]
__handle_mm_fault+0x28bc/0x41c0 mm/memory.c:5089
handle_mm_fault+0x2af/0x9f0 mm/memory.c:5243
faultin_page mm/gup.c:925 [inline]
__get_user_pages+0x614/0x10e0 mm/gup.c:1147
populate_vma_page_range+0x2df/0x420 mm/gup.c:1543
__mm_populate+0x105/0x3b0 mm/gup.c:1652
mm_populate include/linux/mm.h:3153 [inline]
vm_mmap_pgoff+0x2c2/0x3b0 mm/util.c:548
ksys_mmap_pgoff+0x41f/0x5a0 mm/mmap.c:1440
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f0ad708c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0ad7e79168 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f0ad71ac120 RCX: 00007f0ad708c169
RDX: 000000000000000b RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f0ad70e7ca1 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc440b5cef R14: 00007f0ad7e79300 R15: 0000000000022000
</TASK>
Allocated by task 74:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
__kasan_slab_alloc+0x7f/0x90 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:186 [inline]
slab_post_alloc_hook mm/slab.h:711 [inline]
slab_alloc_node mm/slab.c:3256 [inline]
slab_alloc mm/slab.c:3265 [inline]
__kmem_cache_alloc_lru mm/slab.c:3442 [inline]
kmem_cache_alloc+0x1bd/0x3f0 mm/slab.c:3451
kmem_cache_zalloc include/linux/slab.h:670 [inline]
alloc_extent_map fs/btrfs/extent_map.c:49 [inline]
btrfs_drop_extent_map_range+0x129/0x16d0 fs/btrfs/extent_map.c:734
btrfs_replace_extent_map_range+0x106/0x1b0 fs/btrfs/extent_map.c:954
create_io_em+0x1c8/0x2c0 fs/btrfs/inode.c:7250
cow_file_range+0x46e/0xd30 fs/btrfs/inode.c:1300
submit_uncompressed_range fs/btrfs/inode.c:945 [inline]
submit_one_async_extent fs/btrfs/inode.c:1004 [inline]
submit_compressed_extents+0x837/0xcc0 fs/btrfs/inode.c:1110
async_cow_submit+0xa1/0x170 fs/btrfs/inode.c:1500
run_ordered_work fs/btrfs/async-thread.c:211 [inline]
btrfs_work_helper+0x2a9/0xd80 fs/btrfs/async-thread.c:290
process_one_work+0x991/0x15c0 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Freed by task 5252:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:521
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x13b/0x1a0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:162 [inline]
__cache_free mm/slab.c:3389 [inline]
__do_kmem_cache_free mm/slab.c:3576 [inline]
kmem_cache_free mm/slab.c:3601 [inline]
kmem_cache_free+0x105/0x370 mm/slab.c:3594
free_extent_map fs/btrfs/extent_map.c:72 [inline]
free_extent_map+0x147/0x1e0 fs/btrfs/extent_map.c:63
add_ra_bio_pages.isra.0+0x765/0xe30 fs/btrfs/compression.c:431
btrfs_submit_compressed_read+0x58f/0xa40 fs/btrfs/compression.c:530
submit_one_bio+0x228/0x3f0 fs/btrfs/extent_io.c:151
extent_readahead+0x11c4/0x1440 fs/btrfs/extent_io.c:2623
read_pages+0x1a2/0xd40 mm/readahead.c:161
page_cache_ra_unbounded+0x2f7/0x5e0 mm/readahead.c:242
do_page_cache_ra mm/readahead.c:300 [inline]
page_cache_ra_order+0x6ec/0xa00 mm/readahead.c:560
do_sync_mmap_readahead mm/filemap.c:3187 [inline]
filemap_fault+0x140a/0x24a0 mm/filemap.c:3279
__do_fault+0x107/0x600 mm/memory.c:4176
do_read_fault mm/memory.c:4530 [inline]
do_fault mm/memory.c:4659 [inline]
do_pte_missing mm/memory.c:3647 [inline]
handle_pte_fault mm/memory.c:4947 [inline]
__handle_mm_fault+0x28bc/0x41c0 mm/memory.c:5089
handle_mm_fault+0x2af/0x9f0 mm/memory.c:5243
faultin_page mm/gup.c:925 [inline]
__get_user_pages+0x614/0x10e0 mm/gup.c:1147
populate_vma_page_range+0x2df/0x420 mm/gup.c:1543
__mm_populate+0x105/0x3b0 mm/gup.c:1652
mm_populate include/linux/mm.h:3153 [inline]
vm_mmap_pgoff+0x2c2/0x3b0 mm/util.c:548
ksys_mmap_pgoff+0x41f/0x5a0 mm/mmap.c:1440
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
The buggy address belongs to the object at ffff8880002b4380
which belongs to the cache btrfs_extent_map of size 144
The buggy address is located 24 bytes inside of
freed 144-byte region [ffff8880002b4380, ffff8880002b4410)
The buggy address belongs to the physical page:
page:ffffea000000ad00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2b4
flags: 0x7ff00000000200(slab|node=0|zone=0|lastcpupid=0x7ff)
page_type: 0x13()
raw: 007ff00000000200 ffff888048384a00 ffffea0000009050 ffff888013b59a50
raw: 0000000000000000 ffff8880002b4040 0000000100000013 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 0x242040(__GFP_IO|__GFP_NOWARN|__GFP_COMP|__GFP_THISNODE), pid 1079, tgid 1079 (kworker/u17:5), ts 224591757138, free_ts 224280003183
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1722
prep_new_page mm/page_alloc.c:1729 [inline]
get_page_from_freelist+0xf41/0x2c00 mm/page_alloc.c:3493
__alloc_pages_slowpath.constprop.0+0x2e7/0x2170 mm/page_alloc.c:4293
__alloc_pages+0x408/0x4a0 mm/page_alloc.c:4772
__alloc_pages_node include/linux/gfp.h:237 [inline]
kmem_getpages mm/slab.c:1360 [inline]
cache_grow_begin+0x9b/0x3b0 mm/slab.c:2569
cache_alloc_refill+0x27f/0x380 mm/slab.c:2942
____cache_alloc mm/slab.c:3018 [inline]
____cache_alloc mm/slab.c:3001 [inline]
__do_cache_alloc mm/slab.c:3201 [inline]
slab_alloc_node mm/slab.c:3249 [inline]
slab_alloc mm/slab.c:3265 [inline]
__kmem_cache_alloc_lru mm/slab.c:3442 [inline]
kmem_cache_alloc+0x397/0x3f0 mm/slab.c:3451
kmem_cache_zalloc include/linux/slab.h:670 [inline]
alloc_extent_map fs/btrfs/extent_map.c:49 [inline]
btrfs_drop_extent_map_range+0x239/0x16d0 fs/btrfs/extent_map.c:735
btrfs_replace_extent_map_range+0x106/0x1b0 fs/btrfs/extent_map.c:954
create_io_em+0x1c8/0x2c0 fs/btrfs/inode.c:7250
submit_one_async_extent fs/btrfs/inode.c:1025 [inline]
submit_compressed_extents+0x62f/0xcc0 fs/btrfs/inode.c:1110
async_cow_submit+0xa1/0x170 fs/btrfs/inode.c:1500
run_ordered_work fs/btrfs/async-thread.c:211 [inline]
btrfs_work_helper+0x2a9/0xd80 fs/btrfs/async-thread.c:290
process_one_work+0x991/0x15c0 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x344/0x440 kernel/kthread.c:379
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1302 [inline]
free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2555
free_unref_page+0x33/0x370 mm/page_alloc.c:2650
slab_destroy mm/slab.c:1612 [inline]
slabs_destroy+0x85/0xc0 mm/slab.c:1632
cache_flusharray mm/slab.c:3360 [inline]
___cache_free+0x2ae/0x3d0 mm/slab.c:3423
qlink_free mm/kasan/quarantine.c:166 [inline]
qlist_free_all+0x4f/0x1a0 mm/kasan/quarantine.c:185
kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:292
__kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:186 [inline]
slab_post_alloc_hook mm/slab.h:711 [inline]
slab_alloc_node mm/slab.c:3256 [inline]
kmem_cache_alloc_node+0x296/0x510 mm/slab.c:3528
__alloc_skb+0x288/0x330 net/core/skbuff.c:644
alloc_skb include/linux/skbuff.h:1288 [inline]
alloc_skb_with_frags+0x9a/0x6c0 net/core/skbuff.c:6370
sock_alloc_send_pskb+0x7a7/0x930 net/core/sock.c:2729
sock_alloc_send_skb include/net/sock.h:1860 [inline]
mld_newpack.isra.0+0x1b9/0x760 net/ipv6/mcast.c:1748
add_grhead+0x295/0x340 net/ipv6/mcast.c:1851
add_grec+0x1053/0x1610 net/ipv6/mcast.c:1989
mld_send_initial_cr.part.0+0xe7/0x260 net/ipv6/mcast.c:2236
mld_send_initial_cr net/ipv6/mcast.c:1232 [inline]
mld_dad_work+0x1d7/0x680 net/ipv6/mcast.c:2262
Memory state around the buggy address:
ffff8880002b4280: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb
ffff8880002b4300: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff8880002b4380: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880002b4400: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00
ffff8880002b4480: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
==================================================================
---
This report is generated by a bot. It may contain errors.
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If the bug is already fixed, let syzbot know by replying with:
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If you want to change bug's subsystems, reply with:
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If the bug is a duplicate of another bug, reply with:
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If you want to undo deduplication, reply with:
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syzbot found the following issue on:
HEAD commit: 89d77f71f493 Merge tag 'riscv-for-linus-6.4-mw1' of git://..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16edf50c280000
kernel config: https://syzkaller.appspot.com/x/.config?x=4bd54d5f2354efc3
dashboard link: https://syzkaller.appspot.com/bug?extid=f06304d8e679318dc253
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
CC: [c...@fb.com dst...@suse.com jo...@toxicpanda.com linux...@vger.kernel.org linux-...@vger.kernel.org linux-...@vger.kernel.org terr...@fb.com]
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f06304...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in add_ra_bio_pages.isra.0+0xdb0/0xe30 fs/btrfs/compression.c:443
Read of size 8 at addr ffff8880002b4398 by task syz-executor.1/5252
CPU: 0 PID: 5252 Comm: syz-executor.1 Not tainted 6.3.0-syzkaller-11025-g89d77f71f493 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351
print_report mm/kasan/report.c:462 [inline]
kasan_report+0x11c/0x130 mm/kasan/report.c:572
add_ra_bio_pages.isra.0+0xdb0/0xe30 fs/btrfs/compression.c:443
btrfs_submit_compressed_read+0x58f/0xa40 fs/btrfs/compression.c:530
submit_one_bio+0x228/0x3f0 fs/btrfs/extent_io.c:151
extent_readahead+0x11c4/0x1440 fs/btrfs/extent_io.c:2623
read_pages+0x1a2/0xd40 mm/readahead.c:161
page_cache_ra_unbounded+0x2f7/0x5e0 mm/readahead.c:242
do_page_cache_ra mm/readahead.c:300 [inline]
page_cache_ra_order+0x6ec/0xa00 mm/readahead.c:560
do_sync_mmap_readahead mm/filemap.c:3187 [inline]
filemap_fault+0x140a/0x24a0 mm/filemap.c:3279
__do_fault+0x107/0x600 mm/memory.c:4176
do_read_fault mm/memory.c:4530 [inline]
do_fault mm/memory.c:4659 [inline]
do_pte_missing mm/memory.c:3647 [inline]
handle_pte_fault mm/memory.c:4947 [inline]
__handle_mm_fault+0x28bc/0x41c0 mm/memory.c:5089
handle_mm_fault+0x2af/0x9f0 mm/memory.c:5243
faultin_page mm/gup.c:925 [inline]
__get_user_pages+0x614/0x10e0 mm/gup.c:1147
populate_vma_page_range+0x2df/0x420 mm/gup.c:1543
__mm_populate+0x105/0x3b0 mm/gup.c:1652
mm_populate include/linux/mm.h:3153 [inline]
vm_mmap_pgoff+0x2c2/0x3b0 mm/util.c:548
ksys_mmap_pgoff+0x41f/0x5a0 mm/mmap.c:1440
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f0ad708c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0ad7e79168 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f0ad71ac120 RCX: 00007f0ad708c169
RDX: 000000000000000b RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f0ad70e7ca1 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc440b5cef R14: 00007f0ad7e79300 R15: 0000000000022000
</TASK>
Allocated by task 74:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
__kasan_slab_alloc+0x7f/0x90 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:186 [inline]
slab_post_alloc_hook mm/slab.h:711 [inline]
slab_alloc_node mm/slab.c:3256 [inline]
slab_alloc mm/slab.c:3265 [inline]
__kmem_cache_alloc_lru mm/slab.c:3442 [inline]
kmem_cache_alloc+0x1bd/0x3f0 mm/slab.c:3451
kmem_cache_zalloc include/linux/slab.h:670 [inline]
alloc_extent_map fs/btrfs/extent_map.c:49 [inline]
btrfs_drop_extent_map_range+0x129/0x16d0 fs/btrfs/extent_map.c:734
btrfs_replace_extent_map_range+0x106/0x1b0 fs/btrfs/extent_map.c:954
create_io_em+0x1c8/0x2c0 fs/btrfs/inode.c:7250
cow_file_range+0x46e/0xd30 fs/btrfs/inode.c:1300
submit_uncompressed_range fs/btrfs/inode.c:945 [inline]
submit_one_async_extent fs/btrfs/inode.c:1004 [inline]
submit_compressed_extents+0x837/0xcc0 fs/btrfs/inode.c:1110
async_cow_submit+0xa1/0x170 fs/btrfs/inode.c:1500
run_ordered_work fs/btrfs/async-thread.c:211 [inline]
btrfs_work_helper+0x2a9/0xd80 fs/btrfs/async-thread.c:290
process_one_work+0x991/0x15c0 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Freed by task 5252:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:521
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x13b/0x1a0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:162 [inline]
__cache_free mm/slab.c:3389 [inline]
__do_kmem_cache_free mm/slab.c:3576 [inline]
kmem_cache_free mm/slab.c:3601 [inline]
kmem_cache_free+0x105/0x370 mm/slab.c:3594
free_extent_map fs/btrfs/extent_map.c:72 [inline]
free_extent_map+0x147/0x1e0 fs/btrfs/extent_map.c:63
add_ra_bio_pages.isra.0+0x765/0xe30 fs/btrfs/compression.c:431
btrfs_submit_compressed_read+0x58f/0xa40 fs/btrfs/compression.c:530
submit_one_bio+0x228/0x3f0 fs/btrfs/extent_io.c:151
extent_readahead+0x11c4/0x1440 fs/btrfs/extent_io.c:2623
read_pages+0x1a2/0xd40 mm/readahead.c:161
page_cache_ra_unbounded+0x2f7/0x5e0 mm/readahead.c:242
do_page_cache_ra mm/readahead.c:300 [inline]
page_cache_ra_order+0x6ec/0xa00 mm/readahead.c:560
do_sync_mmap_readahead mm/filemap.c:3187 [inline]
filemap_fault+0x140a/0x24a0 mm/filemap.c:3279
__do_fault+0x107/0x600 mm/memory.c:4176
do_read_fault mm/memory.c:4530 [inline]
do_fault mm/memory.c:4659 [inline]
do_pte_missing mm/memory.c:3647 [inline]
handle_pte_fault mm/memory.c:4947 [inline]
__handle_mm_fault+0x28bc/0x41c0 mm/memory.c:5089
handle_mm_fault+0x2af/0x9f0 mm/memory.c:5243
faultin_page mm/gup.c:925 [inline]
__get_user_pages+0x614/0x10e0 mm/gup.c:1147
populate_vma_page_range+0x2df/0x420 mm/gup.c:1543
__mm_populate+0x105/0x3b0 mm/gup.c:1652
mm_populate include/linux/mm.h:3153 [inline]
vm_mmap_pgoff+0x2c2/0x3b0 mm/util.c:548
ksys_mmap_pgoff+0x41f/0x5a0 mm/mmap.c:1440
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
The buggy address belongs to the object at ffff8880002b4380
which belongs to the cache btrfs_extent_map of size 144
The buggy address is located 24 bytes inside of
freed 144-byte region [ffff8880002b4380, ffff8880002b4410)
The buggy address belongs to the physical page:
page:ffffea000000ad00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2b4
flags: 0x7ff00000000200(slab|node=0|zone=0|lastcpupid=0x7ff)
page_type: 0x13()
raw: 007ff00000000200 ffff888048384a00 ffffea0000009050 ffff888013b59a50
raw: 0000000000000000 ffff8880002b4040 0000000100000013 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 0x242040(__GFP_IO|__GFP_NOWARN|__GFP_COMP|__GFP_THISNODE), pid 1079, tgid 1079 (kworker/u17:5), ts 224591757138, free_ts 224280003183
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1722
prep_new_page mm/page_alloc.c:1729 [inline]
get_page_from_freelist+0xf41/0x2c00 mm/page_alloc.c:3493
__alloc_pages_slowpath.constprop.0+0x2e7/0x2170 mm/page_alloc.c:4293
__alloc_pages+0x408/0x4a0 mm/page_alloc.c:4772
__alloc_pages_node include/linux/gfp.h:237 [inline]
kmem_getpages mm/slab.c:1360 [inline]
cache_grow_begin+0x9b/0x3b0 mm/slab.c:2569
cache_alloc_refill+0x27f/0x380 mm/slab.c:2942
____cache_alloc mm/slab.c:3018 [inline]
____cache_alloc mm/slab.c:3001 [inline]
__do_cache_alloc mm/slab.c:3201 [inline]
slab_alloc_node mm/slab.c:3249 [inline]
slab_alloc mm/slab.c:3265 [inline]
__kmem_cache_alloc_lru mm/slab.c:3442 [inline]
kmem_cache_alloc+0x397/0x3f0 mm/slab.c:3451
kmem_cache_zalloc include/linux/slab.h:670 [inline]
alloc_extent_map fs/btrfs/extent_map.c:49 [inline]
btrfs_drop_extent_map_range+0x239/0x16d0 fs/btrfs/extent_map.c:735
btrfs_replace_extent_map_range+0x106/0x1b0 fs/btrfs/extent_map.c:954
create_io_em+0x1c8/0x2c0 fs/btrfs/inode.c:7250
submit_one_async_extent fs/btrfs/inode.c:1025 [inline]
submit_compressed_extents+0x62f/0xcc0 fs/btrfs/inode.c:1110
async_cow_submit+0xa1/0x170 fs/btrfs/inode.c:1500
run_ordered_work fs/btrfs/async-thread.c:211 [inline]
btrfs_work_helper+0x2a9/0xd80 fs/btrfs/async-thread.c:290
process_one_work+0x991/0x15c0 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x344/0x440 kernel/kthread.c:379
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1302 [inline]
free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2555
free_unref_page+0x33/0x370 mm/page_alloc.c:2650
slab_destroy mm/slab.c:1612 [inline]
slabs_destroy+0x85/0xc0 mm/slab.c:1632
cache_flusharray mm/slab.c:3360 [inline]
___cache_free+0x2ae/0x3d0 mm/slab.c:3423
qlink_free mm/kasan/quarantine.c:166 [inline]
qlist_free_all+0x4f/0x1a0 mm/kasan/quarantine.c:185
kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:292
__kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:186 [inline]
slab_post_alloc_hook mm/slab.h:711 [inline]
slab_alloc_node mm/slab.c:3256 [inline]
kmem_cache_alloc_node+0x296/0x510 mm/slab.c:3528
__alloc_skb+0x288/0x330 net/core/skbuff.c:644
alloc_skb include/linux/skbuff.h:1288 [inline]
alloc_skb_with_frags+0x9a/0x6c0 net/core/skbuff.c:6370
sock_alloc_send_pskb+0x7a7/0x930 net/core/sock.c:2729
sock_alloc_send_skb include/net/sock.h:1860 [inline]
mld_newpack.isra.0+0x1b9/0x760 net/ipv6/mcast.c:1748
add_grhead+0x295/0x340 net/ipv6/mcast.c:1851
add_grec+0x1053/0x1610 net/ipv6/mcast.c:1989
mld_send_initial_cr.part.0+0xe7/0x260 net/ipv6/mcast.c:2236
mld_send_initial_cr net/ipv6/mcast.c:1232 [inline]
mld_dad_work+0x1d7/0x680 net/ipv6/mcast.c:2262
Memory state around the buggy address:
ffff8880002b4280: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb
ffff8880002b4300: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff8880002b4380: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880002b4400: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00
ffff8880002b4480: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
==================================================================
---
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syzbot
Jul 28, 2023, 1:29:32 PM7/28/23
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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