================================================================== BUG: KASAN: slab-out-of-bounds in reiserfs_xattr_get+0xe3/0x580 fs/reiserfs/xattr.c:674 Read of size 8 at addr ffff88807e097198 by task syz-executor.5/10357 CPU: 0 PID: 10357 Comm: syz-executor.5 Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x65/0x4b0 mm/kasan/report.c:317 print_report+0x108/0x220 mm/kasan/report.c:433 kasan_report+0xfb/0x130 mm/kasan/report.c:495 reiserfs_xattr_get+0xe3/0x580 fs/reiserfs/xattr.c:674 reiserfs_get_acl+0x7a/0x650 fs/reiserfs/xattr_acl.c:214 get_acl+0x157/0x260 fs/posix_acl.c:152 check_acl+0x35/0x150 fs/namei.c:306 acl_permission_check fs/namei.c:351 [inline] generic_permission+0x388/0x4e0 fs/namei.c:404 do_inode_permission fs/namei.c:458 [inline] inode_permission+0x22c/0x450 fs/namei.c:525 may_open+0x2a4/0x400 fs/namei.c:3185 do_open fs/namei.c:3555 [inline] path_openat+0x24b4/0x2e00 fs/namei.c:3691 do_filp_open+0x275/0x500 fs/namei.c:3718 do_sys_openat2+0x13b/0x500 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fde20c3d654 Code: 84 00 00 00 00 00 44 89 54 24 0c e8 96 f9 ff ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 c8 f9 ff ff 8b 44 RSP: 002b:00007fde21db2f10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007fde20c3d654 RDX: 0000000000010000 RSI: 0000000020000100 RDI: 00000000ffffff9c RBP: 0000000020000100 R08: 0000000000000000 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000010000 R13: 0000000020000100 R14: 00007fde21db2fe0 R15: 0000000020052760 Allocated by task 10357: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:437 [inline] ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:516 kasan_kmalloc include/linux/kasan.h:234 [inline] __kmalloc+0x226/0x370 mm/slub.c:4429 kmalloc_array include/linux/slab.h:640 [inline] kcalloc include/linux/slab.h:671 [inline] __list_lru_init+0xa0/0x5f0 mm/list_lru.c:571 alloc_super+0x778/0x920 fs/super.c:270 sget+0x20e/0x4f0 fs/super.c:642 mount_bdev+0xe8/0x3a0 fs/super.c:1371 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x289/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348 kvfree_call_rcu+0x118/0x8c0 kernel/rcu/tree.c:3341 drop_sysctl_table+0x31c/0x460 fs/proc/proc_sysctl.c:1716 drop_sysctl_table+0x32e/0x460 fs/proc/proc_sysctl.c:1719 unregister_sysctl_table+0x87/0x140 fs/proc/proc_sysctl.c:1754 mpls_net_exit+0x6c/0x270 net/mpls/af_mpls.c:2704 ops_exit_list net/core/net_namespace.c:162 [inline] cleanup_net+0x758/0xc50 net/core/net_namespace.c:594 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348 kvfree_call_rcu+0x118/0x8c0 kernel/rcu/tree.c:3341 drop_sysctl_table+0x31c/0x460 fs/proc/proc_sysctl.c:1716 drop_sysctl_table+0x32e/0x460 fs/proc/proc_sysctl.c:1719 unregister_sysctl_table+0x87/0x140 fs/proc/proc_sysctl.c:1754 mpls_dev_sysctl_unregister+0x7c/0xa0 net/mpls/af_mpls.c:1441 mpls_dev_notify+0x6db/0x7d0 net/mpls/af_mpls.c:1653 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:1945 [inline] call_netdevice_notifiers_extack net/core/dev.c:1983 [inline] call_netdevice_notifiers net/core/dev.c:1997 [inline] unregister_netdevice_many+0x107e/0x1aa0 net/core/dev.c:10843 sit_exit_batch_net+0x495/0x4e0 net/ipv6/sit.c:1883 ops_exit_list net/core/net_namespace.c:167 [inline] cleanup_net+0x80c/0xc50 net/core/net_namespace.c:594 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 The buggy address belongs to the object at ffff88807e097000 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 152 bytes to the right of 256-byte region [ffff88807e097000, ffff88807e097100) The buggy address belongs to the physical page: page:ffffea0001f82580 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7e096 head:ffffea0001f82580 order:1 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0001d9bc80 dead000000000002 ffff888012041b40 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 14168, tgid 14167 (syz-executor.3), ts 1128560321839, free_ts 1128459569912 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x72b/0x7a0 mm/page_alloc.c:4283 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549 alloc_slab_page+0x70/0xf0 mm/slub.c:1829 allocate_slab+0x5e/0x520 mm/slub.c:1974 new_slab mm/slub.c:2034 [inline] ___slab_alloc+0x42e/0xce0 mm/slub.c:3036 __slab_alloc mm/slub.c:3123 [inline] slab_alloc_node mm/slub.c:3214 [inline] slab_alloc mm/slub.c:3256 [inline] kmem_cache_alloc_trace+0x25f/0x310 mm/slub.c:3287 kmalloc include/linux/slab.h:600 [inline] siw_cm_alloc_work+0xc4/0x3c0 drivers/infiniband/sw/siw/siw_cm.c:291 siw_create_listen+0x5ba/0x1180 drivers/infiniband/sw/siw/siw_cm.c:1824 iw_cm_listen+0x154/0x220 drivers/infiniband/core/iwcm.c:583 cma_iw_listen drivers/infiniband/core/cma.c:2640 [inline] rdma_listen+0x952/0xd60 drivers/infiniband/core/cma.c:4036 cma_listen_on_dev+0x3cd/0x6d0 drivers/infiniband/core/cma.c:2699 cma_add_one+0x809/0xb30 drivers/infiniband/core/cma.c:5308 add_client_context+0x4f9/0x830 drivers/infiniband/core/device.c:721 enable_device_and_get+0x1eb/0x450 drivers/infiniband/core/device.c:1332 ib_register_device+0x1153/0x1450 drivers/infiniband/core/device.c:1420 siw_device_register drivers/infiniband/sw/siw/siw_main.c:72 [inline] siw_newlink+0xa76/0xfb0 drivers/infiniband/sw/siw/siw_main.c:522 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1449 [inline] free_pcp_prepare+0x812/0x900 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page+0x7d/0x630 mm/page_alloc.c:3476 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:447 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:727 [inline] slab_alloc_node mm/slub.c:3248 [inline] slab_alloc mm/slub.c:3256 [inline] __kmem_cache_alloc_lru mm/slub.c:3263 [inline] kmem_cache_alloc+0x1a6/0x310 mm/slub.c:3273 kmem_cache_zalloc include/linux/slab.h:723 [inline] jbd2_alloc_handle include/linux/jbd2.h:1596 [inline] new_handle fs/jbd2/transaction.c:476 [inline] jbd2__journal_start+0x143/0x5b0 fs/jbd2/transaction.c:503 __ext4_journal_start_sb+0x111/0x1d0 fs/ext4/ext4_jbd2.c:105 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_rmdir+0x4c0/0xab0 fs/ext4/namei.c:3146 vfs_rmdir+0x358/0x4b0 fs/namei.c:4098 do_rmdir+0x372/0x680 fs/namei.c:4159 __do_sys_unlinkat fs/namei.c:4339 [inline] __se_sys_unlinkat fs/namei.c:4333 [inline] __x64_sys_unlinkat+0xdc/0xf0 fs/namei.c:4333 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88807e097080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807e097100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807e097180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88807e097200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807e097280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================