loop0: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: slab-use-after-free in ciCompare fs/jfs/jfs_dtree.c:3398 [inline] BUG: KASAN: slab-use-after-free in dtSearch+0x210d/0x2430 fs/jfs/jfs_dtree.c:644 Read of size 1 at addr ffff88806079b7d4 by task syz-executor.0/9322 CPU: 1 PID: 9322 Comm: syz-executor.0 Not tainted 6.9.0-rc7-syzkaller-00188-gba16c1cf11c9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 ciCompare fs/jfs/jfs_dtree.c:3398 [inline] dtSearch+0x210d/0x2430 fs/jfs/jfs_dtree.c:644 jfs_lookup+0x1a5/0x370 fs/jfs/namei.c:1461 lookup_open.isra.0+0x928/0x13c0 fs/namei.c:3475 open_last_lookups fs/namei.c:3566 [inline] path_openat+0x92f/0x2990 fs/namei.c:3796 do_filp_open+0x1dc/0x430 fs/namei.c:3826 do_sys_openat2+0x17a/0x1e0 fs/open.c:1406 do_sys_open fs/open.c:1421 [inline] __do_sys_creat fs/open.c:1497 [inline] __se_sys_creat fs/open.c:1491 [inline] __x64_sys_creat+0xcd/0x120 fs/open.c:1491 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff550e7dd69 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:00007ff551c4f0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007ff550fabf80 RCX: 00007ff550e7dd69 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200002c0 RBP: 00007ff550eca49e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007ff550fabf80 R15: 00007ffc2d5a0cf8 Allocated by task 7473: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3804 [inline] slab_alloc_node mm/slub.c:3851 [inline] kmem_cache_alloc_lru+0x142/0x700 mm/slub.c:3870 alloc_inode_sb include/linux/fs.h:3091 [inline] jfs_alloc_inode+0x25/0x60 fs/jfs/super.c:105 alloc_inode+0x5d/0x230 fs/inode.c:261 new_inode_pseudo fs/inode.c:1007 [inline] new_inode+0x22/0x270 fs/inode.c:1033 diReadSpecial+0x51/0x6e0 fs/jfs/jfs_imap.c:423 jfs_mount+0x322/0x8a0 fs/jfs/jfs_mount.c:166 jfs_fill_super+0x5a3/0xd20 fs/jfs/super.c:556 mount_bdev+0x1e3/0x2d0 fs/super.c:1658 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8f/0x380 fs/super.c:1779 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14e6/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __x64_sys_mount+0x297/0x320 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 15: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:240 [inline] __kasan_slab_free+0x11d/0x1a0 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2111 [inline] slab_free mm/slub.c:4286 [inline] kmem_cache_free+0x12e/0x390 mm/slub.c:4350 i_callback+0x43/0x70 fs/inode.c:250 rcu_do_batch kernel/rcu/tree.c:2196 [inline] rcu_core+0x828/0x16b0 kernel/rcu/tree.c:2471 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554 run_ksoftirqd kernel/softirq.c:928 [inline] run_ksoftirqd+0x3a/0x60 kernel/softirq.c:920 smpboot_thread_fn+0x661/0xa10 kernel/smpboot.c:164 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Last potentially related work creation: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541 __call_rcu_common.constprop.0+0x9a/0x790 kernel/rcu/tree.c:2734 destroy_inode+0x12c/0x1b0 fs/inode.c:316 iput_final fs/inode.c:1741 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 diFreeSpecial+0x7a/0x110 fs/jfs/jfs_imap.c:549 jfs_umount+0x193/0x440 fs/jfs/jfs_umount.c:65 jfs_put_super+0x88/0x1d0 fs/jfs/super.c:194 generic_shutdown_super+0x159/0x3d0 fs/super.c:641 kill_block_super+0x3b/0x90 fs/super.c:1675 deactivate_locked_super+0xbe/0x1a0 fs/super.c:472 deactivate_super+0xde/0x100 fs/super.c:505 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xdc/0x260 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88806079b780 which belongs to the cache jfs_ip of size 2240 The buggy address is located 84 bytes inside of freed 2240-byte region [ffff88806079b780, ffff88806079c040) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x60798 head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888022a09701 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888018bde3c0 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff888022a09701 head: 00fff00000000840 ffff888018bde3c0 dead000000000122 0000000000000000 head: 0000000000000000 00000000800d000d 00000001ffffffff ffff888022a09701 head: 00fff00000000003 ffffea000181e601 dead000000000122 00000000ffffffff head: 0000000800000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 6176, tgid 6175 (syz-executor.0), ts 139881672347, free_ts 136970090506 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1534 prep_new_page mm/page_alloc.c:1541 [inline] get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3317 __alloc_pages+0x22b/0x2460 mm/page_alloc.c:4575 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2180 [inline] allocate_slab mm/slub.c:2343 [inline] new_slab+0xcc/0x3a0 mm/slub.c:2396 ___slab_alloc+0x66d/0x1790 mm/slub.c:3530 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3615 __slab_alloc_node mm/slub.c:3668 [inline] slab_alloc_node mm/slub.c:3841 [inline] kmem_cache_alloc_lru+0x383/0x700 mm/slub.c:3870 alloc_inode_sb include/linux/fs.h:3091 [inline] jfs_alloc_inode+0x25/0x60 fs/jfs/super.c:105 alloc_inode+0x5d/0x230 fs/inode.c:261 iget_locked+0x1a1/0x6d0 fs/inode.c:1280 jfs_iget+0x1e/0x4d0 fs/jfs/inode.c:29 jfs_fill_super+0x6c8/0xd20 fs/jfs/super.c:580 mount_bdev+0x1e3/0x2d0 fs/super.c:1658 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8f/0x380 fs/super.c:1779 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14e6/0x1f20 fs/namespace.c:3679 page last free pid 5078 tgid 5063 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1141 [inline] free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2347 free_unref_page+0x33/0x3c0 mm/page_alloc.c:2487 __put_partials+0x14c/0x170 mm/slub.c:2911 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3804 [inline] slab_alloc_node mm/slub.c:3851 [inline] kmem_cache_alloc_node+0x177/0x350 mm/slub.c:3894 __alloc_skb+0x2b1/0x380 net/core/skbuff.c:658 alloc_skb_fclone include/linux/skbuff.h:1363 [inline] tcp_stream_alloc_skb+0x34/0x570 net/ipv4/tcp.c:873 tcp_sendmsg_locked+0xed5/0x3470 net/ipv4/tcp.c:1155 tcp_sendmsg+0x2e/0x50 net/ipv4/tcp.c:1342 inet_sendmsg+0xb9/0x140 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] sock_write_iter+0x4b8/0x5c0 net/socket.c:1160 call_write_iter include/linux/fs.h:2110 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0x6db/0x1100 fs/read_write.c:590 ksys_write+0x1f8/0x260 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 Memory state around the buggy address: ffff88806079b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88806079b700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88806079b780: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88806079b800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88806079b880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================