loop1: detected capacity change from 0 to 32768 find_entry called with index >= next_index ================================================================== BUG: KASAN: slab-use-after-free in jfs_readdir+0x1b79/0x4660 fs/jfs/jfs_dtree.c:2894 Read of size 1 at addr ffff888059100075 by task syz-executor.1/6954 CPU: 1 PID: 6954 Comm: syz-executor.1 Not tainted 6.10.0-rc4-syzkaller-00283-g563a50672d8a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 jfs_readdir+0x1b79/0x4660 fs/jfs/jfs_dtree.c:2894 wrap_directory_iterator+0x94/0xe0 fs/readdir.c:67 iterate_dir+0x65e/0x820 fs/readdir.c:110 __do_sys_getdents fs/readdir.c:326 [inline] __se_sys_getdents+0x1ef/0x4d0 fs/readdir.c:311 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f181b87d0a9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f181c5530c8 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007f181b9b3f80 RCX: 00007f181b87d0a9 RDX: 00000000000000b8 RSI: 0000000020001fc0 RDI: 0000000000000005 RBP: 00007f181b8ec074 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f181b9b3f80 R15: 00007ffec5d77d28 Allocated by task 6894: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3941 [inline] slab_alloc_node mm/slub.c:4001 [inline] kmem_cache_alloc_lru_noprof+0x139/0x2b0 mm/slub.c:4020 xas_alloc lib/xarray.c:376 [inline] xas_create+0x10d0/0x1ae0 lib/xarray.c:678 xas_store+0x98/0x1890 lib/xarray.c:788 __filemap_add_folio+0xacc/0x19d0 mm/filemap.c:914 filemap_add_folio+0x157/0x650 mm/filemap.c:970 __filemap_get_folio+0x4e9/0xc10 mm/filemap.c:1958 ext4_da_write_begin+0x5c9/0xa70 fs/ext4/inode.c:2885 generic_perform_write+0x322/0x640 mm/filemap.c:4015 ext4_buffered_write_iter+0xc6/0x350 fs/ext4/file.c:299 ext4_file_write_iter+0x1de/0x1a10 new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa72/0xc90 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 6895: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2196 [inline] slab_free mm/slub.c:4437 [inline] kmem_cache_free+0x145/0x350 mm/slub.c:4512 rcu_do_batch kernel/rcu/tree.c:2535 [inline] rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2809 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541 __call_rcu_common kernel/rcu/tree.c:3072 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:3176 xa_node_free lib/xarray.c:259 [inline] xas_delete_node lib/xarray.c:496 [inline] update_node lib/xarray.c:760 [inline] xas_store+0xd2c/0x1890 lib/xarray.c:845 page_cache_delete_batch mm/filemap.c:321 [inline] delete_from_page_cache_batch+0x5df/0xc70 mm/filemap.c:343 truncate_inode_pages_range+0x364/0xfc0 mm/truncate.c:359 truncate_inode_pages mm/truncate.c:439 [inline] truncate_pagecache+0x6c/0x90 mm/truncate.c:732 ext4_collapse_range fs/ext4/extents.c:5382 [inline] ext4_fallocate+0xf0c/0x1ff0 fs/ext4/extents.c:4747 vfs_fallocate+0x564/0x6c0 fs/open.c:330 ksys_fallocate fs/open.c:353 [inline] __do_sys_fallocate fs/open.c:361 [inline] __se_sys_fallocate fs/open.c:359 [inline] __x64_sys_fallocate+0xbd/0x110 fs/open.c:359 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888059100000 which belongs to the cache radix_tree_node of size 576 The buggy address is located 117 bytes inside of freed 576-byte region [ffff888059100000, ffff888059100240) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880591039c0 pfn:0x59100 head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88802904bc01 flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000240 ffff88801504fdc0 ffffea0001647310 ffffea0001647610 raw: ffff8880591039c0 0000000000170011 00000001ffffefff ffff88802904bc01 head: 00fff00000000240 ffff88801504fdc0 ffffea0001647310 ffffea0001647610 head: ffff8880591039c0 0000000000170011 00000001ffffefff ffff88802904bc01 head: 00fff00000000002 ffffea0001644001 ffffffffffffffff 0000000000000000 head: ffff888000000004 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Reclaimable, gfp_mask 0x152810(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5460, tgid 5457 (syz-executor.0), ts 85135915711, free_ts 82107740354 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x2e43/0x2f00 mm/page_alloc.c:3420 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4678 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2265 allocate_slab+0x5a/0x2f0 mm/slub.c:2428 new_slab mm/slub.c:2481 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3667 __slab_alloc+0x58/0xa0 mm/slub.c:3757 __slab_alloc_node mm/slub.c:3810 [inline] slab_alloc_node mm/slub.c:3989 [inline] kmem_cache_alloc_lru_noprof+0x1c5/0x2b0 mm/slub.c:4020 xas_alloc lib/xarray.c:376 [inline] xas_create+0x10d0/0x1ae0 lib/xarray.c:678 xas_store+0x98/0x1890 lib/xarray.c:788 shmem_add_to_page_cache+0x9c1/0x1830 mm/shmem.c:790 shmem_alloc_and_add_folio+0x46c/0xdb0 mm/shmem.c:1689 shmem_get_folio_gfp+0x82d/0x1f50 mm/shmem.c:2055 shmem_get_folio mm/shmem.c:2160 [inline] shmem_write_begin+0x170/0x4d0 mm/shmem.c:2743 generic_perform_write+0x322/0x640 mm/filemap.c:4015 shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2919 page last free pid 4531 tgid 4531 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_page+0xd19/0xea0 mm/page_alloc.c:2583 discard_slab mm/slub.c:2527 [inline] __put_partials+0xeb/0x130 mm/slub.c:2995 put_cpu_partial+0x17c/0x250 mm/slub.c:3070 __slab_free+0x2ea/0x3d0 mm/slub.c:4307 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3941 [inline] slab_alloc_node mm/slub.c:4001 [inline] kmalloc_trace_noprof+0x132/0x2c0 mm/slub.c:4148 kmalloc_noprof include/linux/slab.h:660 [inline] kzalloc_noprof include/linux/slab.h:778 [inline] kernfs_iop_get_link+0x67/0x5a0 fs/kernfs/symlink.c:135 vfs_readlink+0x16e/0x3b0 fs/namei.c:5141 do_readlinkat+0x283/0x3b0 fs/stat.c:511 __do_sys_readlink fs/stat.c:532 [inline] __se_sys_readlink fs/stat.c:529 [inline] __x64_sys_readlink+0x7f/0x90 fs/stat.c:529 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff8880590fff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880590fff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888059100000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888059100080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888059100100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================