================================================================== BUG: KASAN: slab-use-after-free in lbmLogShutdown fs/jfs/jfs_logmgr.c:1863 [inline] BUG: KASAN: slab-use-after-free in lmLogInit+0xd17/0x1c90 fs/jfs/jfs_logmgr.c:1416 Read of size 8 at addr ffff8880513ad118 by task syz.0.15/5992 CPU: 0 UID: 0 PID: 5992 Comm: syz.0.15 Not tainted 6.14.0-rc7-syzkaller-gb3ee1e460951 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0x16e/0x5b0 mm/kasan/report.c:521 kasan_report+0x143/0x180 mm/kasan/report.c:634 lbmLogShutdown fs/jfs/jfs_logmgr.c:1863 [inline] lmLogInit+0xd17/0x1c90 fs/jfs/jfs_logmgr.c:1416 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline] lmLogOpen+0x55e/0x1040 fs/jfs/jfs_logmgr.c:1069 jfs_mount_rw+0xf1/0x6a0 fs/jfs/jfs_mount.c:257 jfs_reconfigure+0x632/0x9d0 fs/jfs/super.c:409 reconfigure_super+0x43a/0x870 fs/super.c:1083 do_remount fs/namespace.c:3100 [inline] path_mount+0xc22/0xfa0 fs/namespace.c:3879 do_mount fs/namespace.c:3900 [inline] __do_sys_mount fs/namespace.c:4111 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7efee177e719 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:00007efee24d4038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007efee1935f80 RCX: 00007efee177e719 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000000 RBP: 00007efee17f132e R08: 0000000000000000 R09: 0000000000000000 R10: 00000000001c0030 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007efee1935f80 R15: 00007ffe9dd34c78 Allocated by task 5992: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __kmalloc_cache_noprof+0x243/0x390 mm/slub.c:4325 kmalloc_noprof include/linux/slab.h:901 [inline] lbmLogInit fs/jfs/jfs_logmgr.c:1822 [inline] lmLogInit+0x3b4/0x1c90 fs/jfs/jfs_logmgr.c:1270 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline] lmLogOpen+0x55e/0x1040 fs/jfs/jfs_logmgr.c:1069 jfs_mount_rw+0xf1/0x6a0 fs/jfs/jfs_mount.c:257 jfs_reconfigure+0x632/0x9d0 fs/jfs/super.c:409 reconfigure_super+0x43a/0x870 fs/super.c:1083 do_remount fs/namespace.c:3100 [inline] path_mount+0xc22/0xfa0 fs/namespace.c:3879 do_mount fs/namespace.c:3900 [inline] __do_sys_mount fs/namespace.c:4111 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5992: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4609 [inline] kfree+0x196/0x430 mm/slub.c:4757 lbmLogShutdown fs/jfs/jfs_logmgr.c:1865 [inline] lmLogInit+0xd45/0x1c90 fs/jfs/jfs_logmgr.c:1416 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline] lmLogOpen+0x55e/0x1040 fs/jfs/jfs_logmgr.c:1069 jfs_mount_rw+0xf1/0x6a0 fs/jfs/jfs_mount.c:257 jfs_reconfigure+0x632/0x9d0 fs/jfs/super.c:409 reconfigure_super+0x43a/0x870 fs/super.c:1083 do_remount fs/namespace.c:3100 [inline] path_mount+0xc22/0xfa0 fs/namespace.c:3879 do_mount fs/namespace.c:3900 [inline] __do_sys_mount fs/namespace.c:4111 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8880513ad100 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 24 bytes inside of freed 192-byte region [ffff8880513ad100, ffff8880513ad1c0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x513ad flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000000 ffff88801b0413c0 ffffea0000db7d80 dead000000000002 raw: 0000000000000000 0000000000100010 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 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5329, tgid 5329 (syz-executor), ts 79528866787, free_ts 79395308138 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551 prep_new_page mm/page_alloc.c:1559 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477 __alloc_pages_slowpath+0x434/0x10b0 mm/page_alloc.c:4289 __alloc_frozen_pages_noprof+0x49b/0x710 mm/page_alloc.c:4753 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab+0x8f/0x3a0 mm/slub.c:2587 new_slab mm/slub.c:2640 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826 __slab_alloc+0x58/0xa0 mm/slub.c:3916 __slab_alloc_node mm/slub.c:3991 [inline] slab_alloc_node mm/slub.c:4152 [inline] __do_kmalloc_node mm/slub.c:4293 [inline] __kmalloc_noprof+0x2e6/0x4c0 mm/slub.c:4306 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] new_dir fs/proc/proc_sysctl.c:963 [inline] get_subdir fs/proc/proc_sysctl.c:1007 [inline] sysctl_mkdir_p fs/proc/proc_sysctl.c:1317 [inline] __register_sysctl_table+0xddc/0x1620 fs/proc/proc_sysctl.c:1392 __devinet_sysctl_register+0x1dc/0x2a0 net/ipv4/devinet.c:2631 devinet_sysctl_register+0x17e/0x1f0 net/ipv4/devinet.c:2671 inetdev_init+0x2b4/0x4e0 net/ipv4/devinet.c:299 inetdev_event+0x310/0x1620 net/ipv4/devinet.c:1599 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2244 [inline] call_netdevice_notifiers net/core/dev.c:2258 [inline] register_netdevice+0x16b5/0x1b60 net/core/dev.c:10981 page last free pid 82 tgid 82 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_folios+0xe40/0x18b0 mm/page_alloc.c:2707 shrink_folio_list+0x41a7/0x5ac0 mm/vmscan.c:1518 evict_folios+0x45fd/0x56a0 mm/vmscan.c:4660 try_to_shrink_lruvec+0x713/0x9b0 mm/vmscan.c:4821 shrink_one+0x3b9/0x850 mm/vmscan.c:4866 shrink_many mm/vmscan.c:4929 [inline] lru_gen_shrink_node mm/vmscan.c:5007 [inline] shrink_node+0x379b/0x3e20 mm/vmscan.c:5978 kswapd_shrink_node mm/vmscan.c:6807 [inline] balance_pgdat mm/vmscan.c:6999 [inline] kswapd+0x20f3/0x3b10 mm/vmscan.c:7264 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff8880513ad000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880513ad080: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880513ad100: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880513ad180: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8880513ad200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================