================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:1375 [inline] BUG: KASAN: slab-use-after-free in gfs2_qd_dealloc+0x84/0x104 fs/gfs2/quota.c:115 Write of size 4 at addr ffff0000d6924a78 by task syz-executor379/6120 CPU: 1 PID: 6120 Comm: syz-executor379 Not tainted 6.6.0-rc7-syzkaller-g8de1e7afcc1c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x174/0x514 mm/kasan/report.c:475 kasan_report+0xd8/0x138 mm/kasan/report.c:588 kasan_check_range+0x254/0x294 mm/kasan/generic.c:187 __kasan_check_write+0x20/0x30 mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:1375 [inline] gfs2_qd_dealloc+0x84/0x104 fs/gfs2/quota.c:115 rcu_do_batch kernel/rcu/tree.c:2139 [inline] rcu_core+0x8a4/0x1b28 kernel/rcu/tree.c:2403 rcu_core_si+0x10/0x1c kernel/rcu/tree.c:2420 __do_softirq+0x2d0/0xd54 kernel/softirq.c:553 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:886 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85 invoke_softirq kernel/softirq.c:434 [inline] __irq_exit_rcu+0x200/0x494 kernel/softirq.c:632 irq_exit_rcu+0x14/0x84 kernel/softirq.c:644 __el1_irq arch/arm64/kernel/entry-common.c:503 [inline] el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:517 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:522 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:591 __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:27 [inline] arch_local_irq_enable arch/arm64/include/asm/irqflags.h:49 [inline] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] _raw_spin_unlock_irq+0x34/0x80 kernel/locking/spinlock.c:202 spin_unlock_irq include/linux/spinlock.h:401 [inline] filemap_remove_folio+0xdc/0x1cc mm/filemap.c:258 truncate_inode_folio+0x6c/0x84 mm/truncate.c:195 shmem_undo_range+0x334/0x11c0 mm/shmem.c:1018 shmem_truncate_range mm/shmem.c:1114 [inline] shmem_evict_inode+0x230/0x8b8 mm/shmem.c:1243 evict+0x260/0x68c fs/inode.c:664 iput_final fs/inode.c:1775 [inline] iput+0x734/0x818 fs/inode.c:1801 dentry_unlink_inode+0x370/0x4b0 fs/dcache.c:401 __dentry_kill+0x324/0x5e4 fs/dcache.c:607 dentry_kill+0xc8/0x250 dput+0x218/0x454 fs/dcache.c:913 __fput+0x4f0/0x7f8 fs/file_table.c:392 ____fput+0x20/0x30 fs/file_table.c:412 task_work_run+0x230/0x2e0 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x214c/0x393c arch/arm64/kernel/signal.c:1305 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_svc+0x9c/0x158 arch/arm64/kernel/entry-common.c:679 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Allocated by task 6121: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:511 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:198 [inline] kmalloc_trace+0x70/0x88 mm/slab_common.c:1122 kmalloc include/linux/slab.h:599 [inline] kzalloc include/linux/slab.h:720 [inline] init_sbd fs/gfs2/ops_fstype.c:77 [inline] gfs2_fill_super+0x11c/0x1eec fs/gfs2/ops_fstype.c:1164 get_tree_bdev+0x33c/0x4a8 fs/super.c:1577 gfs2_get_tree+0x54/0x1b4 fs/gfs2/ops_fstype.c:1348 vfs_get_tree+0x90/0x288 fs/super.c:1750 do_new_mount+0x25c/0x8c8 fs/namespace.c:3335 path_mount+0x590/0xe04 fs/namespace.c:3662 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount fs/namespace.c:3861 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3861 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Freed by task 6120: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:522 ____kasan_slab_free+0x144/0x1c0 mm/kasan/common.c:236 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:244 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+0x2ac/0x480 mm/slub.c:3822 kfree+0xb8/0x19c mm/slab_common.c:1075 free_sbd+0x5c/0x6c fs/gfs2/ops_fstype.c:69 gfs2_put_super+0x6e8/0x754 fs/gfs2/super.c:652 generic_shutdown_super+0x130/0x2b8 fs/super.c:693 kill_block_super+0x40/0x74 fs/super.c:1646 gfs2_kill_sb+0x2cc/0x330 deactivate_locked_super+0xac/0x12c fs/super.c:481 deactivate_super+0xe0/0x100 fs/super.c:514 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1254 __cleanup_mnt+0x20/0x30 fs/namespace.c:1261 task_work_run+0x230/0x2e0 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x214c/0x393c arch/arm64/kernel/signal.c:1305 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_svc+0x9c/0x158 arch/arm64/kernel/entry-common.c:679 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 The buggy address belongs to the object at ffff0000d6924000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 2680 bytes inside of freed 8192-byte region [ffff0000d6924000, ffff0000d6926000) The buggy address belongs to the physical page: page:00000000aa8e03a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x116920 head:00000000aa8e03a6 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x5ffc00000000840(slab|head|node=0|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 05ffc00000000840 ffff0000c0002280 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080020002 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d6924900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000d6924980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000d6924a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000d6924a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000d6924b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================