loop0: detected capacity change from 0 to 32768
gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
gfs2: fsid=syz:syz.0: journal 0 mapped with 1 extents in 0ms
gfs2: fsid=syz:syz.0: first mount done, others may mount
loop0: detected capacity change from 32768 to 0
gfs2: fsid=syz:syz.0: Error -5 writing to journal, jid=0
CPU: 0 UID: 0 PID: 5345 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
gfs2_withdraw+0xc3/0x1b0 fs/gfs2/util.c:250
gfs2_end_log_write+0xcd/0x7c0 fs/gfs2/lops.c:212
gfs2_log_submit_bio+0x99/0xe0 fs/gfs2/lops.c:247
gfs2_log_flush+0xb0f/0x24c0 fs/gfs2/log.c:1099
gfs2_write_inode+0x23f/0x3e0 fs/gfs2/super.c:447
write_inode fs/fs-writeback.c:1582 [inline]
__writeback_single_inode+0x7e1/0x1240 fs/fs-writeback.c:1802
writeback_single_inode+0x493/0xc70 fs/fs-writeback.c:1858
sync_inode_metadata+0xb9/0x110 fs/fs-writeback.c:2944
gfs2_fsync+0x1a6/0x370 fs/gfs2/file.c:763
vfs_fsync_range fs/sync.c:188 [inline]
vfs_fsync fs/sync.c:202 [inline]
do_fsync fs/sync.c:213 [inline]
__do_sys_fdatasync fs/sync.c:223 [inline]
__se_sys_fdatasync fs/sync.c:221 [inline]
__x64_sys_fdatasync+0xb9/0x110 fs/sync.c:221
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f03ead8f7c9
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:00007f03ebb9a038 EFLAGS: 00000246 ORIG_RAX: 000000000000004b
RAX: ffffffffffffffda RBX: 00007f03eafe5fa0 RCX: 00007f03ead8f7c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007f03eae13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f03eafe6038 R14: 00007f03eafe5fa0 R15: 00007fff2e397bb8
gfs2: fsid=syz:syz.0: about to withdraw this file system
==================================================================
BUG: KASAN: slab-use-after-free in list_empty include/linux/list.h:381 [inline]
BUG: KASAN: slab-use-after-free in gfs2_discard fs/gfs2/aops.c:589 [inline]
BUG: KASAN: slab-use-after-free in gfs2_invalidate_folio+0x40b/0x750 fs/gfs2/aops.c:627
Read of size 8 at addr ffff8880418211d8 by task syz.0.0/5345
CPU: 0 UID: 0 PID: 5345 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xca/0x240 mm/kasan/report.c:482
kasan_report+0x118/0x150 mm/kasan/report.c:595
list_empty include/linux/list.h:381 [inline]
gfs2_discard fs/gfs2/aops.c:589 [inline]
gfs2_invalidate_folio+0x40b/0x750 fs/gfs2/aops.c:627
folio_invalidate mm/truncate.c:140 [inline]
truncate_cleanup_folio+0x2d8/0x430 mm/truncate.c:160
truncate_inode_pages_range+0x233/0xd90 mm/truncate.c:404
gfs2_evict_inode+0x87a/0x1000 fs/gfs2/super.c:1426
evict+0x5f4/0xae0 fs/inode.c:837
gfs2_evict_inodes fs/gfs2/ops_fstype.c:1760 [inline]
gfs2_kill_sb+0x2bc/0x430 fs/gfs2/ops_fstype.c:1786
deactivate_locked_super+0xbc/0x130 fs/super.c:474
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1318
task_work_run+0x1d4/0x260 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x694/0x22f0 kernel/exit.c:971
do_group_exit+0x21c/0x2d0 kernel/exit.c:1112
get_signal+0x1285/0x1340 kernel/signal.c:3034
arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
exit_to_user_mode_loop+0x87/0x4e0 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f03ead8f7c9
Code: Unable to access opcode bytes at 0x7f03ead8f79f.
RSP: 002b:00007f03ebb9a0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f03eafe5fa8 RCX: 00007f03ead8f7c9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f03eafe5fa8
RBP: 00007f03eafe5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f03eafe6038 R14: 00007fff2e397ad0 R15: 00007fff2e397bb8
Allocated by task 5345:
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
unpoison_slab_object mm/kasan/common.c:340 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4953 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
kmem_cache_alloc_noprof+0x37d/0x710 mm/slub.c:5270
gfs2_alloc_bufdata fs/gfs2/trans.c:173 [inline]
gfs2_trans_add_data+0x200/0x620 fs/gfs2/trans.c:214
gfs2_trans_add_databufs+0x12f/0x1a0 fs/gfs2/trans.c:251
gfs2_iomap_put_folio+0x223/0x480 fs/gfs2/bmap.c:995
iomap_write_iter fs/iomap/buffered-io.c:1137 [inline]
iomap_file_buffered_write+0x5b2/0x9c0 fs/iomap/buffered-io.c:1188
gfs2_file_buffered_write+0x4ed/0x880 fs/gfs2/file.c:1061
gfs2_file_write_iter+0x94e/0x1100 fs/gfs2/file.c:1166
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 5345:
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2540 [inline]
slab_free mm/slub.c:6670 [inline]
kmem_cache_free+0x197/0x620 mm/slub.c:6781
trans_drain fs/gfs2/log.c:1015 [inline]
gfs2_log_flush+0x17a2/0x24c0 fs/gfs2/log.c:1153
gfs2_write_inode+0x23f/0x3e0 fs/gfs2/super.c:447
write_inode fs/fs-writeback.c:1582 [inline]
__writeback_single_inode+0x7e1/0x1240 fs/fs-writeback.c:1802
writeback_single_inode+0x493/0xc70 fs/fs-writeback.c:1858
sync_inode_metadata+0xb9/0x110 fs/fs-writeback.c:2944
gfs2_fsync+0x1a6/0x370 fs/gfs2/file.c:763
vfs_fsync_range fs/sync.c:188 [inline]
vfs_fsync fs/sync.c:202 [inline]
do_fsync fs/sync.c:213 [inline]
__do_sys_fdatasync fs/sync.c:223 [inline]
__se_sys_fdatasync fs/sync.c:221 [inline]
__x64_sys_fdatasync+0xb9/0x110 fs/sync.c:221
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff8880418211c0
which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 24 bytes inside of
freed 80-byte region [ffff8880418211c0, ffff888041821210)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x41821
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000000 ffff88800044aa00 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080240024 00000000f5000000 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 0x52c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5345, tgid 5344 (syz.0.0), ts 87994029141, free_ts 87889827613
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x234/0x290 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0x24e0/0x2580 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2486
alloc_slab_page mm/slub.c:3075 [inline]
allocate_slab+0x86/0x3b0 mm/slub.c:3248
new_slab mm/slub.c:3302 [inline]
___slab_alloc+0xe53/0x1820 mm/slub.c:4656
__slab_alloc+0x65/0x100 mm/slub.c:4779
__slab_alloc_node mm/slub.c:4855 [inline]
slab_alloc_node mm/slub.c:5251 [inline]
kmem_cache_alloc_noprof+0x40f/0x710 mm/slub.c:5270
gfs2_alloc_bufdata fs/gfs2/trans.c:173 [inline]
gfs2_trans_add_meta+0x2cf/0x960 fs/gfs2/trans.c:276
do_gfs2_set_flags fs/gfs2/file.c:265 [inline]
gfs2_fileattr_set+0x780/0x9b0 fs/gfs2/file.c:311
vfs_fileattr_set+0x9c7/0xc50 fs/file_attr.c:299
ioctl_setflags+0x180/0x1e0 fs/file_attr.c:335
do_vfs_ioctl+0x8ed/0x1430 fs/ioctl.c:560
__do_sys_ioctl fs/ioctl.c:595 [inline]
__se_sys_ioctl+0x82/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 2 tgid 2 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943
___free_pages_bulk mm/kasan/shadow.c:333 [inline]
__kasan_populate_vmalloc_do mm/kasan/shadow.c:385 [inline]
__kasan_populate_vmalloc+0x137/0x1d0 mm/kasan/shadow.c:424
kasan_populate_vmalloc include/linux/kasan.h:580 [inline]
alloc_vmap_area+0xdc4/0x14e0 mm/vmalloc.c:2124
__get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3219
__vmalloc_node_range_noprof+0x371/0x16a0 mm/vmalloc.c:4011
__vmalloc_node_noprof+0xc2/0x110 mm/vmalloc.c:4111
alloc_thread_stack_node kernel/fork.c:354 [inline]
dup_task_struct+0x228/0x9a0 kernel/fork.c:923
copy_process+0x4ea/0x3950 kernel/fork.c:2052
kernel_clone+0x21e/0x820 kernel/fork.c:2651
kernel_thread+0x10d/0x160 kernel/fork.c:2712
create_kthread kernel/kthread.c:486 [inline]
kthreadd+0x4fa/0x6f0 kernel/kthread.c:844
ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Memory state around the buggy address:
ffff888041821080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
ffff888041821100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
>ffff888041821180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
^
ffff888041821200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
ffff888041821280: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fc fc
==================================================================