add_index: next_index = 0. Resetting! ================================================================== BUG: KASAN: slab-use-after-free in __mutex_lock_common kernel/locking/rtmutex_api.c:561 [inline] BUG: KASAN: slab-use-after-free in mutex_lock_nested+0x55/0x1d0 kernel/locking/rtmutex_api.c:580 Read of size 1 at addr ffff88806401f950 by task syz.7.101/6858 CPU: 1 UID: 0 PID: 6858 Comm: syz.7.101 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description+0x55/0x1e0 mm/kasan/report.c:378 print_report+0x58/0x70 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 __kasan_check_byte+0x2a/0x40 mm/kasan/common.c:585 kasan_check_byte include/linux/kasan.h:402 [inline] lock_acquire+0x7d/0x350 kernel/locking/lockdep.c:5916 __mutex_lock_common kernel/locking/rtmutex_api.c:561 [inline] mutex_lock_nested+0x55/0x1d0 kernel/locking/rtmutex_api.c:580 lmLog+0x78/0xa10 fs/jfs/jfs_logmgr.c:234 dtLog fs/jfs/jfs_txnmgr.c:1620 [inline] txLog fs/jfs/jfs_txnmgr.c:1402 [inline] txCommit+0x1c92/0x54a0 fs/jfs/jfs_txnmgr.c:1266 add_missing_indices+0x7e5/0xb30 fs/jfs/jfs_dtree.c:2671 jfs_readdir+0x1d15/0x33f0 fs/jfs/jfs_dtree.c:3028 wrap_directory_iterator+0x99/0xe0 fs/readdir.c:67 iterate_dir+0x3ea/0x8a0 fs/readdir.c:114 __do_sys_getdents64 fs/readdir.c:404 [inline] __se_sys_getdents64+0xf1/0x280 fs/readdir.c:389 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc6d92cfb19 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc6d74fd028 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007fc6d9556090 RCX: 00007fc6d92cfb19 RDX: 00000000000000e0 RSI: 0000200000000d00 RDI: 0000000000000004 RBP: 00007fc6d9367af8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc6d9556128 R14: 00007fc6d9556090 R15: 00007ffe1ae7e038 Allocated by task 6847: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:409 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:426 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x3d0/0x670 mm/slub.c:5680 _kmalloc_noprof include/linux/slab.h:991 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] open_inline_log fs/jfs/jfs_logmgr.c:1157 [inline] lmLogOpen+0x2d1/0xf90 fs/jfs/jfs_logmgr.c:1067 jfs_mount_rw+0xf3/0x670 fs/jfs/jfs_mount.c:257 jfs_fill_super+0x769/0xda0 fs/jfs/super.c:533 get_tree_bdev_flags+0x436/0x500 fs/super.c:1821 vfs_get_tree+0x92/0x2a0 fs/super.c:1881 fc_mount fs/namespace.c:1282 [inline] do_new_mount_fc fs/namespace.c:3910 [inline] do_new_mount+0x325/0xb00 fs/namespace.c:3986 do_mount fs/namespace.c:4350 [inline] __do_sys_mount fs/namespace.c:4565 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4542 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 6847: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:264 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:296 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2780 [inline] slab_free mm/slub.c:6630 [inline] kfree+0x1c5/0x6d0 mm/slub.c:6923 lmLogClose+0x296/0x530 fs/jfs/jfs_logmgr.c:-1 jfs_reconfigure+0x6d3/0x990 fs/jfs/super.c:421 reconfigure_super+0x232/0x8f0 fs/super.c:1097 do_remount fs/namespace.c:3538 [inline] path_mount+0xd51/0x1050 fs/namespace.c:4329 do_mount fs/namespace.c:4350 [inline] __do_sys_mount fs/namespace.c:4565 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4542 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88806401f800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 336 bytes inside of freed 1024-byte region [ffff88806401f800, ffff88806401fc00) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x64018 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x80000000000040(head|node=0|zone=1) page_type: f5(slab) raw: 0080000000000040 ffff88813ff13dc0 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 head: 0080000000000040 ffff88813ff13dc0 dead000000000100 dead000000000122 head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 head: 0080000000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 48, tgid 48 (kworker/u8:2), ts 103899060895 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1856 prep_new_page mm/page_alloc.c:1864 [inline] get_page_from_freelist+0x258b/0x2600 mm/page_alloc.c:3935 __alloc_frozen_pages_noprof+0x227/0x440 mm/page_alloc.c:5444 alloc_slab_page mm/slub.c:3384 [inline] allocate_slab+0x7d/0x5e0 mm/slub.c:3499 new_slab mm/slub.c:3550 [inline] refill_objects+0x2d8/0x350 mm/slub.c:7539 refill_sheaf mm/slub.c:2917 [inline] __pcs_replace_empty_main+0x339/0x690 mm/slub.c:4811 alloc_from_pcs mm/slub.c:4887 [inline] slab_alloc_node mm/slub.c:5021 [inline] __do_kmalloc_node mm/slub.c:5530 [inline] __kmalloc_noprof+0x546/0x790 mm/slub.c:5556 _kmalloc_noprof include/linux/slab.h:995 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] ieee802_11_parse_elems_full+0x14b/0x2a10 net/mac80211/parse.c:1077 ieee80211_inform_bss+0x1b3/0x1150 net/mac80211/scan.c:91 rdev_inform_bss net/wireless/rdev-ops.h:457 [inline] cfg80211_inform_single_bss_data+0xd98/0x1bf0 net/wireless/scan.c:2447 cfg80211_inform_bss_data+0x25b/0x3be0 net/wireless/scan.c:3303 cfg80211_inform_bss_frame_data+0x51a/0xae0 net/wireless/scan.c:3399 ieee80211_bss_info_update+0x772/0xa30 net/mac80211/scan.c:236 ieee80211_rx_bss_info net/mac80211/ibss.c:1065 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1546 [inline] ieee80211_ibss_rx_queued_mgmt+0x1ce1/0x2c40 net/mac80211/ibss.c:1573 ieee80211_iface_process_skb net/mac80211/iface.c:1805 [inline] ieee80211_iface_work+0x769/0xfa0 net/mac80211/iface.c:1859 cfg80211_wiphy_work+0x29e/0x420 net/wireless/core.c:610 page last free pid 5909 tgid 5909 ts 103661168697 stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] __free_pages_prepare mm/page_alloc.c:1403 [inline] __free_frozen_pages+0xf8a/0x1060 mm/page_alloc.c:2954 __slab_free+0x26e/0x2c0 mm/slub.c:5926 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:361 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4720 [inline] slab_alloc_node mm/slub.c:5033 [inline] kmem_cache_alloc_node_noprof+0x3f7/0x660 mm/slub.c:5105 __alloc_skb+0x1db/0x7a0 net/core/skbuff.c:705 netlink_sendmsg+0x5cd/0xb20 net/netlink/af_netlink.c:1895 sock_sendmsg_nosec+0x14e/0x190 net/socket.c:800 __sock_sendmsg net/socket.c:818 [inline] __sys_sendto+0x41e/0x5d0 net/socket.c:2283 __do_sys_sendto net/socket.c:2290 [inline] __se_sys_sendto net/socket.c:2286 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2286 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88806401f800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88806401f880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88806401f900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88806401f980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88806401fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================