================================================================== BUG: KASAN: double-free in diUnmount+0xf3/0x100 fs/jfs/jfs_imap.c:195 Free of addr ffff8880231e8000 by task syz-executor.5/5027 CPU: 0 PID: 5027 Comm: syz-executor.5 Not tainted 6.4.0-rc4-syzkaller-00265-g4ecd704a4c51 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:351 [inline] print_report+0x163/0x540 mm/kasan/report.c:462 kasan_report_invalid_free+0xeb/0x100 mm/kasan/report.c:537 ____kasan_slab_free+0xfb/0x120 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook mm/slub.c:1807 [inline] slab_free mm/slub.c:3786 [inline] __kmem_cache_free+0x264/0x3c0 mm/slub.c:3799 diUnmount+0xf3/0x100 fs/jfs/jfs_imap.c:195 jfs_umount+0x186/0x3a0 fs/jfs/jfs_umount.c:63 jfs_put_super+0x8a/0x190 fs/jfs/super.c:194 generic_shutdown_super+0x134/0x340 fs/super.c:500 kill_block_super+0x84/0xf0 fs/super.c:1407 deactivate_locked_super+0xa4/0x110 fs/super.c:331 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1177 task_work_run+0x24a/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f1c4aa8d5d7 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff9e6e2718 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f1c4aa8d5d7 RDX: 00007fff9e6e27ec RSI: 000000000000000a RDI: 00007fff9e6e27e0 RBP: 00007fff9e6e27e0 R08: 00000000ffffffff R09: 00007fff9e6e25b0 R10: 0000555557082893 R11: 0000000000000246 R12: 00007f1c4aae6cdc R13: 00007fff9e6e38a0 R14: 0000555557082810 R15: 00007fff9e6e38e0 Allocated by task 11706: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc_node_track_caller+0xb6/0x230 mm/slab_common.c:986 kmalloc_reserve+0xfe/0x240 net/core/skbuff.c:585 __alloc_skb+0x1b1/0x420 net/core/skbuff.c:654 alloc_skb include/linux/skbuff.h:1288 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:751 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:808 [inline] nsim_dev_trap_report_work+0x250/0xa90 drivers/net/netdevsim/dev.c:853 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405 worker_thread+0xa63/0x1210 kernel/workqueue.c:2552 kthread+0x2b8/0x350 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Freed by task 11706: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:521 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook mm/slub.c:1807 [inline] slab_free mm/slub.c:3786 [inline] __kmem_cache_free+0x264/0x3c0 mm/slub.c:3799 skb_kfree_head net/core/skbuff.c:906 [inline] skb_free_head net/core/skbuff.c:918 [inline] skb_release_data+0x660/0x850 net/core/skbuff.c:948 skb_release_all net/core/skbuff.c:1014 [inline] __kfree_skb net/core/skbuff.c:1028 [inline] consume_skb+0xb3/0x150 net/core/skbuff.c:1244 nsim_dev_trap_report drivers/net/netdevsim/dev.c:824 [inline] nsim_dev_trap_report_work+0x761/0xa90 drivers/net/netdevsim/dev.c:853 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405 worker_thread+0xa63/0x1210 kernel/workqueue.c:2552 kthread+0x2b8/0x350 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the object at ffff8880231e8000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 0 bytes inside of 4096-byte region [ffff8880231e8000, ffff8880231e9000) The buggy address belongs to the physical page: page:ffffea00008c7a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x231e8 head:ffffea00008c7a00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff888012442140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 11706, tgid 11706 (kworker/1:10), ts 1844302704739, free_ts 1844271158667 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1731 prep_new_page mm/page_alloc.c:1738 [inline] get_page_from_freelist+0x321c/0x33a0 mm/page_alloc.c:3502 __alloc_pages+0x255/0x670 mm/page_alloc.c:4768 alloc_slab_page+0x6a/0x160 mm/slub.c:1851 allocate_slab mm/slub.c:1998 [inline] new_slab+0x84/0x2f0 mm/slub.c:2051 ___slab_alloc+0xa85/0x10a0 mm/slub.c:3192 __slab_alloc mm/slub.c:3291 [inline] __slab_alloc_node mm/slub.c:3344 [inline] slab_alloc_node mm/slub.c:3441 [inline] __kmem_cache_alloc_node+0x1b8/0x290 mm/slub.c:3490 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc_node_track_caller+0xa5/0x230 mm/slab_common.c:986 kmalloc_reserve+0xfe/0x240 net/core/skbuff.c:585 __alloc_skb+0x1b1/0x420 net/core/skbuff.c:654 alloc_skb include/linux/skbuff.h:1288 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:751 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:808 [inline] nsim_dev_trap_report_work+0x250/0xa90 drivers/net/netdevsim/dev.c:853 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405 worker_thread+0xa63/0x1210 kernel/workqueue.c:2552 kthread+0x2b8/0x350 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x903/0xa30 mm/page_alloc.c:2564 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2659 free_large_kmalloc+0xff/0x190 mm/slab_common.c:943 diMount+0x657/0x870 fs/jfs/jfs_imap.c:115 jfs_mount_rw+0x2da/0x6a0 fs/jfs/jfs_mount.c:240 jfs_remount+0x3d1/0x6b0 fs/jfs/super.c:454 reconfigure_super+0x3c9/0x7c0 fs/super.c:956 vfs_fsconfig_locked fs/fsopen.c:254 [inline] __do_sys_fsconfig fs/fsopen.c:439 [inline] __se_sys_fsconfig+0xa29/0xf70 fs/fsopen.c:314 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff8880231e7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880231e7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880231e8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880231e8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880231e8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================