SQUASHFS error: lzo decompression failed, data probably corrupt SQUASHFS error: Failed to read block 0x144: -5 SQUASHFS error: Unable to read metadata cache entry [142] SQUASHFS error: Unable to read inode 0x11f ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline] BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] BUG: KASAN: slab-use-after-free in mapping_unevictable include/linux/pagemap.h:269 [inline] BUG: KASAN: slab-use-after-free in folio_evictable mm/internal.h:499 [inline] BUG: KASAN: slab-use-after-free in lru_add+0x25f/0xd60 mm/swap.c:136 Read of size 8 at addr ffff88807f7cc3c8 by task syz.5.239/7206 CPU: 0 UID: 0 PID: 7206 Comm: syz.5.239 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x189/0x250 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 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:200 instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] mapping_unevictable include/linux/pagemap.h:269 [inline] folio_evictable mm/internal.h:499 [inline] lru_add+0x25f/0xd60 mm/swap.c:136 folio_batch_move_lru+0x294/0x420 mm/swap.c:172 lru_add_drain_cpu+0x119/0x870 mm/swap.c:648 lru_add_drain+0x122/0x3e0 mm/swap.c:737 __folio_batch_release+0x48/0x90 mm/swap.c:1059 folio_batch_release include/linux/pagevec.h:101 [inline] truncate_inode_pages_range+0x346/0xd90 mm/truncate.c:408 evict+0x607/0xae0 fs/inode.c:839 squashfs_fill_super+0x85b/0x22f0 fs/squashfs/super.c:479 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1691 vfs_get_tree+0x92/0x2a0 fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount+0x302/0xa10 fs/namespace.c:3712 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb052f90eea 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:00007fb053e2fe68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fb053e2fef0 RCX: 00007fb052f90eea RDX: 00002000000001c0 RSI: 0000200000000200 RDI: 00007fb053e2feb0 RBP: 00002000000001c0 R08: 00007fb053e2fef0 R09: 0000000000000040 R10: 0000000000000040 R11: 0000000000000246 R12: 0000200000000200 R13: 00007fb053e2feb0 R14: 00000000000001a2 R15: 00002000000043c0 Allocated by task 7187: 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:5267 [inline] kmem_cache_alloc_noprof+0x37d/0x710 mm/slub.c:5274 gfs2_glock_get+0x263/0xf10 fs/gfs2/glock.c:1096 gfs2_inode_lookup+0x270/0xbe0 fs/gfs2/inode.c:149 gfs2_dir_search+0x168/0x220 fs/gfs2/dir.c:1665 gfs2_lookupi+0x3d9/0x5a0 fs/gfs2/inode.c:354 gfs2_jindex_hold fs/gfs2/ops_fstype.c:573 [inline] init_journal+0x553/0x2170 fs/gfs2/ops_fstype.c:713 init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:844 gfs2_fill_super+0x1a08/0x21b0 fs/gfs2/ops_fstype.c:1250 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1691 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1332 vfs_get_tree+0x92/0x2a0 fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount+0x302/0xa10 fs/namespace.c:3712 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 23: 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:6674 [inline] kmem_cache_free+0x197/0x620 mm/slub.c:6785 rcu_do_batch kernel/rcu/tree.c:2605 [inline] rcu_core+0xd70/0x1870 kernel/rcu/tree.c:2857 handle_softirqs+0x27d/0x850 kernel/softirq.c:626 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:1067 smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556 __call_rcu_common kernel/rcu/tree.c:3119 [inline] call_rcu+0x157/0x9c0 kernel/rcu/tree.c:3239 __gfs2_glock_free+0xb44/0xc90 fs/gfs2/glock.c:145 gfs2_glock_free+0x3c/0xa0 fs/gfs2/glock.c:151 gfs2_glock_put_eventually fs/gfs2/super.c:1170 [inline] gfs2_evict_inode+0xae7/0x1000 fs/gfs2/super.c:1445 evict+0x5f4/0xae0 fs/inode.c:837 gfs2_jindex_free+0x39c/0x440 fs/gfs2/super.c:79 init_journal+0x865/0x2170 fs/gfs2/ops_fstype.c:826 init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:844 gfs2_fill_super+0x1a08/0x21b0 fs/gfs2/ops_fstype.c:1250 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1691 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1332 vfs_get_tree+0x92/0x2a0 fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount+0x302/0xa10 fs/namespace.c:3712 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Second to last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556 insert_work+0x3d/0x330 kernel/workqueue.c:2199 __queue_work+0xcd0/0xf90 kernel/workqueue.c:2354 queue_delayed_work_on+0x18b/0x280 kernel/workqueue.c:2574 queue_delayed_work include/linux/workqueue.h:684 [inline] gfs2_glock_queue_work fs/gfs2/glock.c:222 [inline] do_xmote+0x514/0x750 fs/gfs2/glock.c:737 glock_work_func+0x2a8/0x580 fs/gfs2/glock.c:1009 process_one_work+0x93a/0x15a0 kernel/workqueue.c:3279 process_scheduled_works kernel/workqueue.c:3362 [inline] worker_thread+0x9b0/0xee0 kernel/workqueue.c:3443 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 The buggy address belongs to the object at ffff88807f7cc000 which belongs to the cache gfs2_glock(aspace) of size 1224 The buggy address is located 968 bytes inside of freed 1224-byte region [ffff88807f7cc000, ffff88807f7cc4c8) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7f7cc head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801c349b40 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 head: 00fff00000000040 ffff88801c349b40 dead000000000122 0000000000000000 head: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 head: 00fff00000000002 ffffea0001fdf301 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 7187, tgid 7184 (syz.0.237), ts 158779772373, free_ts 94818850922 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+0x2365/0x2440 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+0xf2b/0x1960 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:5255 [inline] kmem_cache_alloc_noprof+0x40f/0x710 mm/slub.c:5274 gfs2_glock_get+0x263/0xf10 fs/gfs2/glock.c:1096 gfs2_inode_lookup+0x270/0xbe0 fs/gfs2/inode.c:149 gfs2_dir_search+0x168/0x220 fs/gfs2/dir.c:1665 gfs2_lookupi+0x3d9/0x5a0 fs/gfs2/inode.c:354 gfs2_jindex_hold fs/gfs2/ops_fstype.c:573 [inline] init_journal+0x553/0x2170 fs/gfs2/ops_fstype.c:713 init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:844 gfs2_fill_super+0x1a08/0x21b0 fs/gfs2/ops_fstype.c:1250 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1691 page last free pid 6198 tgid 6198 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 tlb_batch_list_free mm/mmu_gather.c:159 [inline] tlb_finish_mmu+0x144/0x230 mm/mmu_gather.c:507 exit_mmap+0x439/0xb10 mm/mmap.c:1290 __mmput+0x118/0x430 kernel/fork.c:1177 exit_mm+0x1da/0x2c0 kernel/exit.c:581 do_exit+0x850/0x25b0 kernel/exit.c:959 do_group_exit+0x21c/0x2d0 kernel/exit.c:1112 __do_sys_exit_group kernel/exit.c:1123 [inline] __se_sys_exit_group kernel/exit.c:1121 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1121 __pfx_syscall_get_nr+0x0/0x10 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88807f7cc280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807f7cc300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807f7cc380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807f7cc400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807f7cc480: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc 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