================================================================== BUG: KASAN: slab-use-after-free in lbmLogShutdown fs/jfs/jfs_logmgr.c:1862 [inline] BUG: KASAN: slab-use-after-free in lmLogInit+0x1105/0x19d0 fs/jfs/jfs_logmgr.c:1415 Read of size 8 at addr ffff88802805d518 by task syz.1.552/8157 CPU: 0 UID: 0 PID: 8157 Comm: syz.1.552 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 lbmLogShutdown fs/jfs/jfs_logmgr.c:1862 [inline] lmLogInit+0x1105/0x19d0 fs/jfs/jfs_logmgr.c:1415 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline] lmLogOpen+0x4e1/0xf90 fs/jfs/jfs_logmgr.c:1069 jfs_mount_rw+0xe9/0x670 fs/jfs/jfs_mount.c:257 jfs_reconfigure+0x5f9/0xa00 fs/jfs/super.c:409 reconfigure_super+0x227/0x880 fs/super.c:1076 do_remount fs/namespace.c:3279 [inline] path_mount+0xd1a/0xfe0 fs/namespace.c:4029 do_mount fs/namespace.c:4050 [inline] __do_sys_mount fs/namespace.c:4238 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4215 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x8a/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f423178efc9 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f42325ed038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f42319e5fa0 RCX: 00007f423178efc9 RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000000 RBP: 00007f4231811f91 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000001c0030 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f42319e6038 R14: 00007f42319e5fa0 R15: 00007ffe5b46df48 Allocated by task 8157: kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 poison_kmalloc_redzone mm/kasan/common.c:400 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:417 kasan_kmalloc include/linux/kasan.h:262 [inline] __kmalloc_cache_noprof+0x3d5/0x6f0 mm/slub.c:5763 kmalloc_noprof include/linux/slab.h:957 [inline] lbmLogInit fs/jfs/jfs_logmgr.c:1821 [inline] lmLogInit+0x3c0/0x19d0 fs/jfs/jfs_logmgr.c:1269 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline] lmLogOpen+0x4e1/0xf90 fs/jfs/jfs_logmgr.c:1069 jfs_mount_rw+0xe9/0x670 fs/jfs/jfs_mount.c:257 jfs_reconfigure+0x5f9/0xa00 fs/jfs/super.c:409 reconfigure_super+0x227/0x880 fs/super.c:1076 do_remount fs/namespace.c:3279 [inline] path_mount+0xd1a/0xfe0 fs/namespace.c:4029 do_mount fs/namespace.c:4050 [inline] __do_sys_mount fs/namespace.c:4238 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4215 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x8a/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e Freed by task 8157: kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2539 [inline] slab_free mm/slub.c:6630 [inline] kfree+0x19a/0x6d0 mm/slub.c:6837 lbmLogShutdown fs/jfs/jfs_logmgr.c:1864 [inline] lmLogInit+0x1133/0x19d0 fs/jfs/jfs_logmgr.c:1415 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline] lmLogOpen+0x4e1/0xf90 fs/jfs/jfs_logmgr.c:1069 jfs_mount_rw+0xe9/0x670 fs/jfs/jfs_mount.c:257 jfs_reconfigure+0x5f9/0xa00 fs/jfs/super.c:409 reconfigure_super+0x227/0x880 fs/super.c:1076 do_remount fs/namespace.c:3279 [inline] path_mount+0xd1a/0xfe0 fs/namespace.c:4029 do_mount fs/namespace.c:4050 [inline] __do_sys_mount fs/namespace.c:4238 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4215 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x8a/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e The buggy address belongs to the object at ffff88802805d500 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 24 bytes inside of freed 192-byte region [ffff88802805d500, ffff88802805d5c0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2805d anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88813fe263c0 ffffea0000a1eb40 dead000000000005 raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52c00(GFP_NOIO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (swapper/0), ts 17093631687, free_ts 16337006100 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850 prep_new_page mm/page_alloc.c:1858 [inline] get_page_from_freelist+0x2cf4/0x2ea0 mm/page_alloc.c:3884 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:3055 [inline] allocate_slab+0x96/0x340 mm/slub.c:3228 new_slab mm/slub.c:3282 [inline] ___slab_alloc+0xecf/0x18d0 mm/slub.c:4651 __slab_alloc+0x65/0x100 mm/slub.c:4770 __slab_alloc_node mm/slub.c:4846 [inline] slab_alloc_node mm/slub.c:5268 [inline] __do_kmalloc_node mm/slub.c:5641 [inline] __kmalloc_noprof+0x471/0x7f0 mm/slub.c:5654 kmalloc_noprof include/linux/slab.h:961 [inline] usb_alloc_urb+0x46/0x150 drivers/usb/core/urb.c:75 usb_internal_control_msg drivers/usb/core/message.c:96 [inline] usb_control_msg+0x118/0x3e0 drivers/usb/core/message.c:154 usb_get_descriptor+0xb1/0x3e0 drivers/usb/core/message.c:794 usb_get_device_descriptor+0x6d/0xd0 drivers/usb/core/message.c:1065 register_root_hub+0x111/0x590 drivers/usb/core/hcd.c:971 usb_add_hcd+0xba1/0x1050 drivers/usb/core/hcd.c:2993 vhci_hcd_probe+0x144/0x380 drivers/usb/usbip/vhci_hcd.c:1385 platform_probe+0xf9/0x190 drivers/base/platform.c:1405 page last free pid 44 tgid 44 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1394 [inline] __free_frozen_pages+0xbc2/0xd30 mm/page_alloc.c:2906 vfree+0x25a/0x400 mm/vmalloc.c:3440 delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3359 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x1790 kernel/workqueue.c:3346 worker_thread+0xa57/0xfc0 kernel/workqueue.c:3427 kthread+0x711/0x890 kernel/kthread.c:463 ret_from_fork+0x4b8/0x860 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffff88802805d400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802805d480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff88802805d500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802805d580: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88802805d600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================