Hello, syzbot found the following issue on: HEAD commit: 622322f53c6d Merge tag 'mips-fixes_6.3_2' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=171a5858280000 kernel config: https://syzkaller.appspot.com/x/.config?x=f50728861d49a880 dashboard link: https://syzkaller.appspot.com/bug?extid=fe580b81668777c77370 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+fe580b81668777c77370@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: double-free in hfsplus_release_folio+0x28d/0x5f0 fs/hfsplus/inode.c:103 Free of addr ffff888027e37500 by task kswapd1/111 CPU: 1 PID: 111 Comm: kswapd1 Not tainted 6.3.0-rc7-syzkaller-00191-g622322f53c6d #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319 print_report mm/kasan/report.c:430 [inline] kasan_report_invalid_free+0xe8/0x100 mm/kasan/report.c:501 ____kasan_slab_free+0x160/0x1a0 mm/kasan/common.c:225 kasan_slab_free include/linux/kasan.h:162 [inline] __cache_free mm/slab.c:3390 [inline] __do_kmem_cache_free mm/slab.c:3577 [inline] __kmem_cache_free+0xcd/0x2c0 mm/slab.c:3584 hfsplus_release_folio+0x28d/0x5f0 fs/hfsplus/inode.c:103 filemap_release_folio+0x13f/0x1b0 mm/filemap.c:4121 shrink_folio_list+0x1fe3/0x3c80 mm/vmscan.c:2010 evict_folios+0x794/0x1940 mm/vmscan.c:5121 try_to_shrink_lruvec+0x82c/0xb90 mm/vmscan.c:5297 shrink_one+0x46b/0x810 mm/vmscan.c:5341 shrink_many mm/vmscan.c:5394 [inline] lru_gen_shrink_node mm/vmscan.c:5511 [inline] shrink_node+0x2064/0x35f0 mm/vmscan.c:6459 kswapd_shrink_node mm/vmscan.c:7262 [inline] balance_pgdat+0xa02/0x1ac0 mm/vmscan.c:7452 kswapd+0x677/0xd60 mm/vmscan.c:7712 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 </TASK> Allocated by task 14963: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] ____kasan_kmalloc mm/kasan/common.c:333 [inline] __kasan_kmalloc+0xa3/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc+0x5e/0x190 mm/slab_common.c:980 kmalloc include/linux/slab.h:584 [inline] kzalloc include/linux/slab.h:720 [inline] __hfs_bnode_create+0x107/0x840 fs/hfsplus/bnode.c:409 hfsplus_bnode_find+0x41c/0xc60 fs/hfsplus/bnode.c:486 hfsplus_btree_write+0x1e/0x470 fs/hfsplus/btree.c:289 hfsplus_system_write_inode fs/hfsplus/super.c:136 [inline] hfsplus_write_inode fs/hfsplus/super.c:162 [inline] hfsplus_write_inode+0x323/0x520 fs/hfsplus/super.c:147 write_inode fs/fs-writeback.c:1456 [inline] __writeback_single_inode+0x9f8/0xdc0 fs/fs-writeback.c:1668 writeback_sb_inodes+0x54d/0xe70 fs/fs-writeback.c:1894 wb_writeback+0x294/0xa50 fs/fs-writeback.c:2068 wb_do_writeback fs/fs-writeback.c:2211 [inline] wb_workfn+0x2a5/0xfc0 fs/fs-writeback.c:2251 process_one_work+0x991/0x15c0 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Freed by task 26614: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:521 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x13b/0x1a0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] __cache_free mm/slab.c:3390 [inline] __do_kmem_cache_free mm/slab.c:3577 [inline] __kmem_cache_free+0xcd/0x2c0 mm/slab.c:3584 hfsplus_btree_close+0xab/0x390 fs/hfsplus/btree.c:275 hfsplus_put_super+0x24c/0x3f0 fs/hfsplus/super.c:301 generic_shutdown_super+0x158/0x480 fs/super.c:500 kill_block_super+0x9b/0xf0 fs/super.c:1407 deactivate_locked_super+0x98/0x160 fs/super.c:331 deactivate_super+0xb1/0xd0 fs/super.c:362 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1177 task_work_run+0x16f/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0x7b/0x90 mm/kasan/generic.c:491 __call_rcu_common.constprop.0+0x99/0x7e0 kernel/rcu/tree.c:2622 neigh_parms_release net/core/neighbour.c:1781 [inline] neigh_parms_release+0x209/0x290 net/core/neighbour.c:1772 addrconf_ifdown.isra.0+0x1394/0x1940 net/ipv6/addrconf.c:3909 addrconf_notify+0x106/0x19f0 net/ipv6/addrconf.c:3678 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1937 call_netdevice_notifiers_extack net/core/dev.c:1975 [inline] call_netdevice_notifiers net/core/dev.c:1989 [inline] unregister_netdevice_many_notify+0x75f/0x18c0 net/core/dev.c:10844 unregister_netdevice_many net/core/dev.c:10900 [inline] default_device_exit_batch+0x451/0x5b0 net/core/dev.c:11353 ops_exit_list+0x125/0x170 net/core/net_namespace.c:174 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:613 process_one_work+0x991/0x15c0 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Second to last potentially related work creation: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0x7b/0x90 mm/kasan/generic.c:491 insert_work+0x48/0x350 kernel/workqueue.c:1361 __queue_work+0x625/0x1120 kernel/workqueue.c:1524 queue_work_on+0xf2/0x110 kernel/workqueue.c:1552 queue_work include/linux/workqueue.h:504 [inline] netdevice_queue_work drivers/infiniband/core/roce_gid_mgmt.c:659 [inline] netdevice_event+0x5e9/0x8f0 drivers/infiniband/core/roce_gid_mgmt.c:802 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1937 call_netdevice_notifiers_extack net/core/dev.c:1975 [inline] call_netdevice_notifiers net/core/dev.c:1989 [inline] register_netdevice+0xfb4/0x1640 net/core/dev.c:10080 __ip_tunnel_create+0x398/0x5b0 net/ipv4/ip_tunnel.c:267 ip_tunnel_init_net+0x1f9/0x5d0 net/ipv4/ip_tunnel.c:1073 ops_init+0xb9/0x6b0 net/core/net_namespace.c:135 setup_net+0x5d1/0xc50 net/core/net_namespace.c:338 copy_net_ns+0x4ee/0x8e0 net/core/net_namespace.c:490 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:228 ksys_unshare+0x449/0x920 kernel/fork.c:3204 __do_sys_unshare kernel/fork.c:3275 [inline] __se_sys_unshare kernel/fork.c:3273 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:3273 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888027e37500 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 0 bytes inside of 192-byte region [ffff888027e37500, ffff888027e375c0) The buggy address belongs to the physical page: page:ffffea00009f8dc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888027e37c00 pfn:0x27e37 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffff888012440000 ffffea000000e1d0 ffffea00008f5d90 raw: ffff888027e37c00 ffff888027e37000 000000010000000e 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_THISNODE), pid 5187, tgid 5187 (syz-executor.3), ts 324581905282, free_ts 324551889087 prep_new_page mm/page_alloc.c:2553 [inline] get_page_from_freelist+0x1190/0x2e20 mm/page_alloc.c:4326 __alloc_pages_slowpath.constprop.0+0x2e7/0x2170 mm/page_alloc.c:5126 __alloc_pages+0x408/0x4a0 mm/page_alloc.c:5605 __alloc_pages_node include/linux/gfp.h:237 [inline] kmem_getpages mm/slab.c:1360 [inline] cache_grow_begin+0x9b/0x3b0 mm/slab.c:2570 cache_alloc_refill+0x27f/0x380 mm/slab.c:2943 ____cache_alloc mm/slab.c:3019 [inline] ____cache_alloc mm/slab.c:3002 [inline] __do_cache_alloc mm/slab.c:3205 [inline] slab_alloc_node mm/slab.c:3250 [inline] __kmem_cache_alloc_node+0x382/0x3f0 mm/slab.c:3541 __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc_node+0x51/0x1a0 mm/slab_common.c:974 kmalloc_array_node include/linux/slab.h:697 [inline] kcalloc_node include/linux/slab.h:702 [inline] memcg_alloc_slab_cgroups+0xee/0x1e0 mm/memcontrol.c:2899 memcg_slab_post_alloc_hook+0xaa/0x340 mm/slab.h:546 slab_post_alloc_hook mm/slab.h:777 [inline] slab_alloc_node mm/slab.c:3257 [inline] slab_alloc mm/slab.c:3266 [inline] __kmem_cache_alloc_lru mm/slab.c:3443 [inline] kmem_cache_alloc+0x1f1/0x3f0 mm/slab.c:3452 vm_area_dup+0x21/0x1f0 kernel/fork.c:466 dup_mmap+0x6bd/0x1480 kernel/fork.c:644 dup_mm kernel/fork.c:1549 [inline] copy_mm kernel/fork.c:1598 [inline] copy_process+0x7082/0x7590 kernel/fork.c:2268 kernel_clone+0xeb/0x890 kernel/fork.c:2683 __do_sys_clone+0xba/0x100 kernel/fork.c:2824 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1454 [inline] free_pcp_prepare+0x5d5/0xa50 mm/page_alloc.c:1504 free_unref_page_prepare mm/page_alloc.c:3388 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3483 slab_destroy mm/slab.c:1613 [inline] slabs_destroy+0x85/0xc0 mm/slab.c:1633 cache_flusharray mm/slab.c:3361 [inline] ___cache_free+0x2ae/0x3d0 mm/slab.c:3424 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x4f/0x1a0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:769 [inline] slab_alloc_node mm/slab.c:3257 [inline] __kmem_cache_alloc_node+0x1fc/0x3f0 mm/slab.c:3541 __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc+0x4e/0x190 mm/slab_common.c:980 kmalloc include/linux/slab.h:584 [inline] kzalloc include/linux/slab.h:720 [inline] tomoyo_encode2.part.0+0xe9/0x3a0 security/tomoyo/realpath.c:45 tomoyo_encode2 security/tomoyo/realpath.c:31 [inline] tomoyo_encode+0x2c/0x50 security/tomoyo/realpath.c:80 tomoyo_realpath_from_path+0x185/0x600 security/tomoyo/realpath.c:283 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x297/0x3a0 security/tomoyo/file.c:771 tomoyo_file_open security/tomoyo/tomoyo.c:332 [inline] tomoyo_file_open+0xa1/0xc0 security/tomoyo/tomoyo.c:327 security_file_open+0x49/0xb0 security/security.c:1719 do_dentry_open+0x575/0x13f0 fs/open.c:907 Memory state around the buggy address: ffff888027e37400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888027e37480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff888027e37500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888027e37580: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888027e37600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- This report is generated by a bot. 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