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================================================================== BUG: KASAN: slab-use-after-free in xfs_inode_item_push+0x28a/0x2e0 fs/xfs/xfs_inode_item.c:776 Read of size 8 at addr ffff88805ebe87e0 by task xfsaild/loop5/10155 CPU: 1 PID: 10155 Comm: xfsaild/loop5 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: <TASK> dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xa8/0x210 mm/kasan/report.c:468 kasan_report+0x117/0x150 mm/kasan/report.c:581 xfs_inode_item_push+0x28a/0x2e0 fs/xfs/xfs_inode_item.c:776 xfsaild_push_item fs/xfs/xfs_trans_ail.c:414 [inline] xfsaild_push fs/xfs/xfs_trans_ail.c:486 [inline] xfsaild+0xc84/0x25e0 fs/xfs/xfs_trans_ail.c:671 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 </TASK> Allocated by task 10120: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:53 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x6e/0x4b0 mm/slab.h:767 slab_alloc_node mm/slub.c:3495 [inline] slab_alloc mm/slub.c:3503 [inline] __kmem_cache_alloc_lru mm/slub.c:3510 [inline] kmem_cache_alloc+0x11a/0x2d0 mm/slub.c:3519 kmem_cache_zalloc include/linux/slab.h:711 [inline] xfs_inode_item_init+0x33/0xc0 fs/xfs/xfs_inode_item.c:871 xfs_trans_ijoin+0xd8/0x120 fs/xfs/libxfs/xfs_trans_inode.c:36 xfs_trans_alloc_ichange+0xd8/0x530 fs/xfs/xfs_trans.c:1297 xfs_ioctl_setattr_get_trans fs/xfs/xfs_ioctl.c:1220 [inline] xfs_fileattr_set+0x5e7/0x17d0 fs/xfs/xfs_ioctl.c:1367 vfs_fileattr_set+0x85d/0xb10 fs/ioctl.c:697 ioctl_setflags fs/ioctl.c:729 [inline] do_vfs_ioctl+0x1449/0x1cc0 fs/ioctl.c:840 __do_sys_ioctl fs/ioctl.c:869 [inline] __se_sys_ioctl+0x83/0x170 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Freed by task 3: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:53 kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522 ____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:237 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1811 [inline] slab_free_freelist_hook+0x130/0x1a0 mm/slub.c:1837 slab_free mm/slub.c:3830 [inline] kmem_cache_free+0xf8/0x270 mm/slub.c:3852 xfs_inode_free_callback+0x14f/0x1c0 fs/xfs/xfs_icache.c:145 rcu_do_batch kernel/rcu/tree.c:2194 [inline] rcu_core+0xcfb/0x1770 kernel/rcu/tree.c:2467 handle_softirqs+0x280/0x820 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 The buggy address belongs to the object at ffff88805ebe87b0 which belongs to the cache xfs_ili of size 264 The buggy address is located 48 bytes inside of freed 264-byte region [ffff88805ebe87b0, ffff88805ebe88b8) The buggy address belongs to the physical page: page:ffffea00017afa00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5ebe8 flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000800 ffff888018fbe280 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800c000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x112c50(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5914, tgid 5913 (syz.0.26), ts 95807326330, free_ts 27432984022 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1554 prep_new_page mm/page_alloc.c:1561 [inline] get_page_from_freelist+0x1951/0x19e0 mm/page_alloc.c:3191 __alloc_pages+0x1f0/0x460 mm/page_alloc.c:4457 alloc_slab_page+0x5d/0x160 mm/slub.c:1881 allocate_slab mm/slub.c:2028 [inline] new_slab+0x87/0x2d0 mm/slub.c:2081 ___slab_alloc+0xc5d/0x12f0 mm/slub.c:3253 __slab_alloc mm/slub.c:3339 [inline] __slab_alloc_node mm/slub.c:3392 [inline] slab_alloc_node mm/slub.c:3485 [inline] slab_alloc mm/slub.c:3503 [inline] __kmem_cache_alloc_lru mm/slub.c:3510 [inline] kmem_cache_alloc+0x1b3/0x2d0 mm/slub.c:3519 kmem_cache_zalloc include/linux/slab.h:711 [inline] xfs_inode_item_init+0x33/0xc0 fs/xfs/xfs_inode_item.c:871 xfs_trans_ijoin+0xd8/0x120 fs/xfs/libxfs/xfs_trans_inode.c:36 xfs_init_new_inode+0xacb/0xd70 fs/xfs/xfs_inode.c:901 xfs_qm_qino_alloc+0x4a4/0x990 fs/xfs/xfs_qm.c:790 xfs_qm_init_quotainos+0x4a9/0x6d0 fs/xfs/xfs_qm.c:1576 xfs_qm_init_quotainfo+0x11b/0x11a0 fs/xfs/xfs_qm.c:643 xfs_qm_mount_quotas+0xa0/0x600 fs/xfs/xfs_qm.c:1460 xfs_mountfs+0x165b/0x1d40 fs/xfs/xfs_mount.c:962 xfs_fs_fill_super+0x112f/0x13a0 fs/xfs/xfs_super.c:1747 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1154 [inline] free_unref_page_prepare+0x7b2/0x8c0 mm/page_alloc.c:2336 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429 free_contig_range+0xa1/0x150 mm/page_alloc.c:6369 destroy_args+0x80/0x850 mm/debug_vm_pgtable.c:1015 debug_vm_pgtable+0x411/0x440 mm/debug_vm_pgtable.c:1400 do_one_initcall+0x242/0x790 init/main.c:1250 do_initcall_level+0x137/0x1f0 init/main.c:1312 do_initcalls+0x69/0xd0 init/main.c:1328 kernel_init_freeable+0x3ed/0x580 init/main.c:1565 kernel_init+0x1d/0x1c0 init/main.c:1455 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 Memory state around the buggy address: ffff88805ebe8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805ebe8700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc >ffff88805ebe8780: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb ^ ffff88805ebe8800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805ebe8880: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fb ==================================================================
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026/01/27 13:32 | linux-6.6.y | cbb31f77b879 | 9a514c2f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in xfs_inode_item_push |