ffff8880709d7770: 68 77 9d 70 80 88 ff ff 00 00 00 00 00 00 00 00 hw.p............ ffff8880709d7780: 80 77 9d 70 80 88 ff ff 80 77 9d 70 80 88 ff ff .w.p.....w.p.... ffff8880709d7790: 00 00 00 00 00 00 00 00 04 00 00 00 00 00 00 00 ................ ffff8880709d77a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ ffff8880709d77b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ ================================================================== BUG: KASAN: slab-out-of-bounds in hex_dump_to_buffer+0xdc1/0xdf0 lib/hexdump.c:193 Read of size 1 at addr ffff8880709d77c0 by task syz-executor.5/21830 CPU: 0 PID: 21830 Comm: syz-executor.5 Not tainted 6.0.0-rc6-next-20220923-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15e/0x45d mm/kasan/report.c:395 kasan_report+0xbb/0x1f0 mm/kasan/report.c:495 hex_dump_to_buffer+0xdc1/0xdf0 lib/hexdump.c:193 print_hex_dump+0x12f/0x1d0 lib/hexdump.c:276 ea_get.cold+0xaa/0x197 fs/jfs/xattr.c:561 __jfs_getxattr+0xc4/0x3d0 fs/jfs/xattr.c:807 jfs_xattr_get+0x39/0x50 fs/jfs/xattr.c:931 __vfs_getxattr+0xd9/0x140 fs/xattr.c:407 cap_inode_need_killpriv+0x3c/0x60 security/commoncap.c:301 security_inode_need_killpriv+0x40/0x90 security/security.c:1420 dentry_needs_remove_privs fs/inode.c:1995 [inline] dentry_needs_remove_privs+0x9b/0x100 fs/inode.c:1985 do_truncate+0xc9/0x200 fs/open.c:57 vfs_truncate+0x3db/0x4c0 fs/open.c:111 do_sys_truncate.part.0+0x11e/0x140 fs/open.c:134 do_sys_truncate fs/open.c:128 [inline] __do_sys_truncate fs/open.c:146 [inline] __se_sys_truncate fs/open.c:144 [inline] __x64_sys_truncate+0x69/0x90 fs/open.c:144 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f382a08a5a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f382b13f168 EFLAGS: 00000246 ORIG_RAX: 000000000000004c RAX: ffffffffffffffda RBX: 00007f382a1ac050 RCX: 00007f382a08a5a9 RDX: 0000000000000000 RSI: 0000000000000060 RDI: 0000000020000140 RBP: 00007f382a0e5560 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd544ba40f R14: 00007f382b13f300 R15: 0000000000022000 Allocated by task 21830: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45 kasan_set_track+0x21/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x7e/0x80 mm/kasan/common.c:325 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:754 [inline] slab_alloc_node mm/slub.c:3336 [inline] slab_alloc mm/slub.c:3344 [inline] __kmem_cache_alloc_lru mm/slub.c:3351 [inline] kmem_cache_alloc_lru+0x255/0x730 mm/slub.c:3367 alloc_inode_sb include/linux/fs.h:3106 [inline] jfs_alloc_inode+0x23/0x60 fs/jfs/super.c:105 alloc_inode+0x61/0x230 fs/inode.c:259 iget_locked+0x1b7/0x6f0 fs/inode.c:1286 jfs_iget+0x1a/0x4d0 fs/jfs/inode.c:29 jfs_lookup+0x246/0x2f0 fs/jfs/namei.c:1462 __lookup_slow+0x24c/0x460 fs/namei.c:1685 lookup_slow fs/namei.c:1702 [inline] walk_component+0x33f/0x5a0 fs/namei.c:1993 lookup_last fs/namei.c:2450 [inline] path_lookupat+0x1ba/0x840 fs/namei.c:2474 filename_lookup+0x1ce/0x590 fs/namei.c:2503 user_path_at_empty+0x42/0x60 fs/namei.c:2876 user_path_at include/linux/namei.h:57 [inline] do_sys_truncate.part.0+0x86/0x140 fs/open.c:132 do_sys_truncate fs/open.c:128 [inline] __do_sys_truncate fs/open.c:146 [inline] __se_sys_truncate fs/open.c:144 [inline] __x64_sys_truncate+0x69/0x90 fs/open.c:144 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:481 call_rcu+0x99/0x820 kernel/rcu/tree.c:2796 destroy_inode+0x129/0x1b0 fs/inode.c:314 iput_final fs/inode.c:1747 [inline] iput.part.0+0x59b/0x880 fs/inode.c:1773 iput+0x58/0x70 fs/inode.c:1763 diFreeSpecial+0x73/0x100 fs/jfs/jfs_imap.c:548 jfs_umount+0x233/0x3f0 fs/jfs/jfs_umount.c:91 jfs_put_super+0x81/0x190 fs/jfs/super.c:194 generic_shutdown_super+0x154/0x410 fs/super.c:491 kill_block_super+0x97/0xf0 fs/super.c:1427 deactivate_locked_super+0x94/0x160 fs/super.c:331 deactivate_super+0xad/0xd0 fs/super.c:362 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1186 task_work_run+0x16b/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+0x23c/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:296 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd Second to last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:481 call_rcu+0x99/0x820 kernel/rcu/tree.c:2796 destroy_inode+0x129/0x1b0 fs/inode.c:314 iput_final fs/inode.c:1747 [inline] iput.part.0+0x59b/0x880 fs/inode.c:1773 iput+0x58/0x70 fs/inode.c:1763 diFreeSpecial+0x73/0x100 fs/jfs/jfs_imap.c:548 jfs_umount+0x1fe/0x3f0 fs/jfs/jfs_umount.c:83 jfs_put_super+0x81/0x190 fs/jfs/super.c:194 generic_shutdown_super+0x154/0x410 fs/super.c:491 kill_block_super+0x97/0xf0 fs/super.c:1427 deactivate_locked_super+0x94/0x160 fs/super.c:331 deactivate_super+0xad/0xd0 fs/super.c:362 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1186 task_work_run+0x16b/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+0x23c/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:296 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff8880709d6f00 which belongs to the cache jfs_ip of size 2240 The buggy address is located 0 bytes to the right of 2240-byte region [ffff8880709d6f00, ffff8880709d77c0) The buggy address belongs to the physical page: page:ffffea0001c27400 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffffea0001c2e400 pfn:0x709d0 head:ffffea0001c27400 order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff8880228fb601 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888146333000 dead0000000d000d 0000000000000000 raw: ffffea0001c2e400 dead000000000002 00000001ffffffff ffff8880228fb601 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 8337, tgid 8331 (syz-executor.5), ts 450765359632, free_ts 257620366552 prep_new_page mm/page_alloc.c:2538 [inline] get_page_from_freelist+0x1092/0x2d20 mm/page_alloc.c:4287 __alloc_pages+0x1c7/0x5a0 mm/page_alloc.c:5546 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2280 alloc_slab_page mm/slub.c:1739 [inline] allocate_slab+0x213/0x300 mm/slub.c:1884 new_slab mm/slub.c:1937 [inline] ___slab_alloc+0xac1/0x1430 mm/slub.c:3119 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3217 slab_alloc_node mm/slub.c:3302 [inline] slab_alloc mm/slub.c:3344 [inline] __kmem_cache_alloc_lru mm/slub.c:3351 [inline] kmem_cache_alloc_lru+0x4aa/0x730 mm/slub.c:3367 alloc_inode_sb include/linux/fs.h:3106 [inline] jfs_alloc_inode+0x23/0x60 fs/jfs/super.c:105 alloc_inode+0x61/0x230 fs/inode.c:259 iget_locked+0x1b7/0x6f0 fs/inode.c:1286 jfs_iget+0x1a/0x4d0 fs/jfs/inode.c:29 jfs_lookup+0x246/0x2f0 fs/jfs/namei.c:1462 __lookup_slow+0x24c/0x460 fs/namei.c:1685 lookup_slow fs/namei.c:1702 [inline] walk_component+0x33f/0x5a0 fs/namei.c:1993 lookup_last fs/namei.c:2450 [inline] path_lookupat+0x1ba/0x840 fs/namei.c:2474 filename_lookup+0x1ce/0x590 fs/namei.c:2503 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1458 [inline] free_pcp_prepare+0x65c/0xd90 mm/page_alloc.c:1508 free_unref_page_prepare mm/page_alloc.c:3386 [inline] free_unref_page+0x19/0x4d0 mm/page_alloc.c:3482 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2532 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x62/0x80 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:754 [inline] slab_alloc_node mm/slub.c:3336 [inline] __kmem_cache_alloc_node+0x2d2/0x3d0 mm/slub.c:3375 kmalloc_node_trace+0x1d/0x60 mm/slab_common.c:1027 kmalloc_node include/linux/slab.h:581 [inline] kzalloc_node include/linux/slab.h:706 [inline] __get_vm_area_node+0xed/0x3f0 mm/vmalloc.c:2494 __vmalloc_node_range+0x250/0x13a0 mm/vmalloc.c:3173 __vmalloc_node mm/vmalloc.c:3278 [inline] vzalloc+0x67/0x80 mm/vmalloc.c:3351 do_ipt_get_ctl+0x60d/0x9d0 net/ipv4/netfilter/ip_tables.c:801 nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:116 ip_getsockopt+0x185/0x1e0 net/ipv4/ip_sockglue.c:1796 tcp_getsockopt+0x95/0xf0 net/ipv4/tcp.c:4398 __sys_getsockopt+0x216/0x690 net/socket.c:2296 Memory state around the buggy address: ffff8880709d7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880709d7700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880709d7780: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff8880709d7800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880709d7880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================