================================================================== BUG: KASAN: slab-use-after-free in __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] BUG: KASAN: slab-use-after-free in _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162 Read of size 1 at addr ffff88802626de68 by task kworker/u8:6/1126 CPU: 1 UID: 0 PID: 1126 Comm: kworker/u8:6 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026 Workqueue: events_unbound cfg80211_wiphy_work Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xba/0x230 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 __kasan_check_byte+0x2a/0x40 mm/kasan/common.c:574 kasan_check_byte include/linux/kasan.h:402 [inline] lock_acquire+0x84/0x330 kernel/locking/lockdep.c:5842 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162 rtlock_slowlock kernel/locking/rtmutex.c:1894 [inline] rtlock_lock kernel/locking/spinlock_rt.c:43 [inline] __rt_spin_lock kernel/locking/spinlock_rt.c:49 [inline] rt_spin_lock+0x157/0x400 kernel/locking/spinlock_rt.c:57 spin_lock include/linux/spinlock_rt.h:44 [inline] __wake_up_common_lock+0x2f/0x1e0 kernel/sched/wait.c:124 blk_update_request+0x57e/0xe60 block/blk-mq.c:1007 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1169 blk_complete_reqs block/blk-mq.c:1244 [inline] blk_done_softirq+0x10a/0x160 block/blk-mq.c:1249 handle_softirqs+0x1de/0x640 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] __local_bh_enable_ip+0x170/0x2b0 kernel/softirq.c:302 local_bh_enable include/linux/bottom_half.h:33 [inline] spin_unlock_bh include/linux/spinlock_rt.h:111 [inline] cfg80211_inform_single_bss_data+0x1445/0x1b30 net/wireless/scan.c:2389 cfg80211_inform_bss_data+0x23f/0x3c20 net/wireless/scan.c:3228 cfg80211_inform_bss_frame_data+0x3c7/0x710 net/wireless/scan.c:3319 ieee80211_bss_info_update+0x794/0xa40 net/mac80211/scan.c:230 ieee80211_rx_bss_info net/mac80211/ibss.c:1094 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1575 [inline] ieee80211_ibss_rx_queued_mgmt+0x1901/0x2c80 net/mac80211/ibss.c:1602 ieee80211_iface_process_skb net/mac80211/iface.c:1740 [inline] ieee80211_iface_work+0x85e/0x12b0 net/mac80211/iface.c:1794 cfg80211_wiphy_work+0x2ab/0x450 net/wireless/core.c:438 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340 worker_thread+0xda6/0x1360 kernel/workqueue.c:3421 kthread+0x726/0x8b0 kernel/kthread.c:463 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Allocated by task 7028: 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:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x1f2/0x6b0 mm/slub.c:5780 kmalloc_noprof include/linux/slab.h:957 [inline] lbmLogInit fs/jfs/jfs_logmgr.c:1821 [inline] lmLogInit+0x3e5/0x1a00 fs/jfs/jfs_logmgr.c:1269 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline] lmLogOpen+0x4e1/0xfa0 fs/jfs/jfs_logmgr.c:1069 jfs_mount_rw+0xee/0x670 fs/jfs/jfs_mount.c:257 jfs_fill_super+0x754/0xd80 fs/jfs/super.c:532 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1691 vfs_get_tree+0x92/0x2a0 fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount+0x329/0xa50 fs/namespace.c:3712 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 7028: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2540 [inline] slab_free mm/slub.c:6674 [inline] kfree+0x1bb/0x8f0 mm/slub.c:6882 lbmLogShutdown fs/jfs/jfs_logmgr.c:1864 [inline] lmLogShutdown+0x456/0x850 fs/jfs/jfs_logmgr.c:1683 lmLogClose+0x28a/0x520 fs/jfs/jfs_logmgr.c:1459 jfs_umount+0x2ef/0x3c0 fs/jfs/jfs_umount.c:114 jfs_fill_super+0x9c5/0xd80 fs/jfs/super.c:567 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1691 vfs_get_tree+0x92/0x2a0 fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount+0x329/0xa50 fs/namespace.c:3712 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88802626de00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 104 bytes inside of freed 256-byte region [ffff88802626de00, ffff88802626df00) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2626c head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x80000000000040(head|node=0|zone=1) page_type: f5(slab) raw: 0080000000000040 ffff88813fe26b40 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 head: 0080000000000040 ffff88813fe26b40 0000000000000000 dead000000000001 head: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 head: 0080000000000001 ffffea0000989b01 00000000ffffffff 00000000ffffffff head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000002 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 13, tgid 13 (kworker/u8:1), ts 8970503986, free_ts 8797964337 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x228/0x280 mm/page_alloc.c:1884 prep_new_page mm/page_alloc.c:1892 [inline] get_page_from_freelist+0x28bb/0x2950 mm/page_alloc.c:3945 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5240 alloc_slab_page mm/slub.c:3077 [inline] allocate_slab+0x7a/0x3a0 mm/slub.c:3248 new_slab mm/slub.c:3302 [inline] ___slab_alloc+0xaf8/0x13d0 mm/slub.c:4656 __slab_alloc+0xc5/0x1f0 mm/slub.c:4779 __slab_alloc_node mm/slub.c:4855 [inline] slab_alloc_node mm/slub.c:5251 [inline] __kmalloc_cache_node_noprof+0x1aa/0x6e0 mm/slub.c:5788 kmalloc_node_noprof include/linux/slab.h:983 [inline] blk_alloc_flush_queue+0x7f/0x240 block/blk-flush.c:483 blk_mq_init_hctx block/blk-mq.c:3988 [inline] blk_mq_alloc_and_init_hctx+0x7bd/0xc70 block/blk-mq.c:4523 __blk_mq_realloc_hw_ctxs+0x2bd/0x670 block/blk-mq.c:4570 blk_mq_realloc_hw_ctxs block/blk-mq.c:4607 [inline] blk_mq_init_allocated_queue+0x35c/0x13a0 block/blk-mq.c:4637 blk_mq_alloc_queue+0x1ba/0x2e0 block/blk-mq.c:4419 scsi_alloc_sdev+0x7b0/0xc20 drivers/scsi/scsi_scan.c:339 scsi_probe_and_add_lun+0x200/0x4830 drivers/scsi/scsi_scan.c:1218 __scsi_scan_target+0x1f0/0xe10 drivers/scsi/scsi_scan.c:1789 scsi_scan_channel drivers/scsi/scsi_scan.c:1877 [inline] scsi_scan_host_selected+0x375/0x690 drivers/scsi/scsi_scan.c:1906 page last free pid 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1433 [inline] __free_pages_ok+0xa61/0xbd0 mm/page_alloc.c:1609 make_alloc_exact+0xf0/0x1a0 mm/page_alloc.c:5407 vring_alloc_queue drivers/virtio/virtio_ring.c:321 [inline] vring_alloc_queue_split+0x223/0x600 drivers/virtio/virtio_ring.c:1101 vring_create_virtqueue_split drivers/virtio/virtio_ring.c:1209 [inline] vring_create_virtqueue+0xde/0x3b0 drivers/virtio/virtio_ring.c:2743 setup_vq+0xf2/0x2e0 drivers/virtio/virtio_pci_legacy.c:131 vp_setup_vq+0xc4/0x3f0 drivers/virtio/virtio_pci_common.c:222 vp_find_one_vq_msix+0xc4/0x490 drivers/virtio/virtio_pci_common.c:352 vp_find_vqs_msix+0x9df/0xd40 drivers/virtio/virtio_pci_common.c:429 vp_find_vqs+0x9c/0x790 drivers/virtio/virtio_pci_common.c:525 virtio_find_vqs include/linux/virtio_config.h:298 [inline] virtscsi_init+0x7f9/0xb80 drivers/scsi/virtio_scsi.c:881 virtscsi_probe+0x39c/0xd70 drivers/scsi/virtio_scsi.c:939 virtio_dev_probe+0xd93/0x1050 drivers/virtio/virtio.c:347 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x267/0xaf0 drivers/base/dd.c:661 __driver_probe_device+0x18c/0x320 drivers/base/dd.c:803 driver_probe_device+0x4f/0x240 drivers/base/dd.c:833 __driver_attach+0x349/0x640 drivers/base/dd.c:1227 Memory state around the buggy address: ffff88802626dd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88802626dd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88802626de00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802626de80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802626df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================