loop1: detected capacity change from 0 to 14901 jfs_mount: diMount failed w/rc = -5 ================================================================== BUG: KASAN: slab-use-after-free in diFree+0x1fbb/0x2fb0 fs/jfs/jfs_imap.c:871 Read of size 4 at addr ffff888079e98004 by task syz-executor.1/31234 CPU: 0 PID: 31234 Comm: syz-executor.1 Not tainted 6.3.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 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:319 [inline] print_report+0x163/0x540 mm/kasan/report.c:430 kasan_report+0x176/0x1b0 mm/kasan/report.c:536 diFree+0x1fbb/0x2fb0 fs/jfs/jfs_imap.c:871 jfs_evict_inode+0x32d/0x440 fs/jfs/inode.c:156 evict+0x2a4/0x620 fs/inode.c:665 jfs_mount+0x536/0x830 fs/jfs/jfs_mount.c:203 jfs_fill_super+0x59c/0xc50 fs/jfs/super.c:556 mount_bdev+0x271/0x3a0 fs/super.c:1380 legacy_get_tree+0xef/0x190 fs/fs_context.c:610 vfs_get_tree+0x8c/0x270 fs/super.c:1510 do_new_mount+0x28f/0xae0 fs/namespace.c:3042 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3571 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 RIP: 0033:0x7f0cb508d62a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 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:00007f0cb5ebbf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000000236b RCX: 00007f0cb508d62a RDX: 0000000020005d00 RSI: 0000000020002600 RDI: 00007f0cb5ebbfe0 RBP: 00007f0cb5ebc020 R08: 00007f0cb5ebc020 R09: 0000000000000089 R10: 0000000000000089 R11: 0000000000000202 R12: 0000000020005d00 R13: 0000000020002600 R14: 00007f0cb5ebbfe0 R15: 0000000020000000 Allocated by task 6047: 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:967 [inline] __kmalloc_node_track_caller+0xb6/0x230 mm/slab_common.c:987 kmalloc_reserve+0xfe/0x240 net/core/skbuff.c:537 __alloc_skb+0x1b1/0x420 net/core/skbuff.c:606 alloc_skb include/linux/skbuff.h:1277 [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:2390 worker_thread+0xa63/0x1210 kernel/workqueue.c:2537 kthread+0x270/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Freed by task 6047: 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:3787 [inline] __kmem_cache_free+0x264/0x3c0 mm/slub.c:3800 skb_kfree_head net/core/skbuff.c:858 [inline] skb_free_head net/core/skbuff.c:870 [inline] skb_release_data+0x51d/0x810 net/core/skbuff.c:899 skb_release_all net/core/skbuff.c:964 [inline] __kfree_skb net/core/skbuff.c:978 [inline] consume_skb+0xb1/0x150 net/core/skbuff.c:1191 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:2390 worker_thread+0xa63/0x1210 kernel/workqueue.c:2537 kthread+0x270/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the object at ffff888079e98000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 4 bytes inside of freed 4096-byte region [ffff888079e98000, ffff888079e99000) The buggy address belongs to the physical page: page:ffffea0001e7a600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x79e98 head:ffffea0001e7a600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012442140 ffffea0000c9be00 dead000000000002 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 0x1d2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 9267, tgid 9267 (udevd), ts 1530447662587, free_ts 1530253406698 prep_new_page mm/page_alloc.c:2553 [inline] get_page_from_freelist+0x3246/0x33c0 mm/page_alloc.c:4326 __alloc_pages+0x255/0x670 mm/page_alloc.c:5592 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:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x1b8/0x290 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc+0xa8/0x230 mm/slab_common.c:980 kmalloc include/linux/slab.h:584 [inline] tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path2_perm+0x3b8/0xb20 security/tomoyo/file.c:923 tomoyo_path_rename+0x198/0x1e0 security/tomoyo/tomoyo.c:299 security_path_rename+0x173/0x210 security/security.c:1231 do_renameat2+0x7fc/0x13c0 fs/namei.c:4910 __do_sys_rename fs/namei.c:4969 [inline] __se_sys_rename fs/namei.c:4967 [inline] __x64_sys_rename+0x86/0x90 fs/namei.c:4967 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 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 mm/page_alloc.c:1504 [inline] free_unref_page_prepare+0xe2f/0xe70 mm/page_alloc.c:3388 free_unref_page+0x37/0x3f0 mm/page_alloc.c:3483 free_large_kmalloc+0xff/0x190 mm/slab_common.c:944 diUnmount+0xf3/0x100 fs/jfs/jfs_imap.c:195 jfs_umount+0x1fc/0x3a0 fs/jfs/jfs_umount.c:80 jfs_fill_super+0x91a/0xc50 fs/jfs/super.c:600 mount_bdev+0x271/0x3a0 fs/super.c:1380 legacy_get_tree+0xef/0x190 fs/fs_context.c:610 vfs_get_tree+0x8c/0x270 fs/super.c:1510 do_new_mount+0x28f/0xae0 fs/namespace.c:3042 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3571 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: ffff888079e97f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888079e97f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888079e98000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888079e98080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888079e98100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================