loop0: detected capacity change from 0 to 32768 lbmIODone: I/O error in JFS log ================================================================== BUG: KASAN: slab-use-after-free in lbmLogShutdown fs/jfs/jfs_logmgr.c:1860 [inline] BUG: KASAN: slab-use-after-free in lmLogInit+0x111a/0x1a00 fs/jfs/jfs_logmgr.c:1413 Read of size 8 at addr ffff88801f742718 by task syz.0.0/5325 CPU: 0 UID: 0 PID: 5325 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 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 lbmLogShutdown fs/jfs/jfs_logmgr.c:1860 [inline] lmLogInit+0x111a/0x1a00 fs/jfs/jfs_logmgr.c:1413 open_inline_log fs/jfs/jfs_logmgr.c:1173 [inline] lmLogOpen+0x4e1/0xfa0 fs/jfs/jfs_logmgr.c:1067 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:1694 vfs_get_tree+0x92/0x2a0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3758 [inline] do_new_mount+0x341/0xd30 fs/namespace.c:3834 do_mount fs/namespace.c:4167 [inline] __do_sys_mount fs/namespace.c:4383 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4360 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f27b479e0ca Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f27b5644e18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f27b5644ea0 RCX: 00007f27b479e0ca RDX: 0000200000000380 RSI: 00002000000006c0 RDI: 00007f27b5644e60 RBP: 0000200000000380 R08: 00007f27b5644ea0 R09: 000000000220c880 R10: 000000000220c880 R11: 0000000000000246 R12: 00002000000006c0 R13: 00007f27b5644e60 R14: 0000000000005ed2 R15: 00002000000011c0 Allocated by task 5325: 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+0x31c/0x660 mm/slub.c:5419 kmalloc_noprof include/linux/slab.h:950 [inline] lbmLogInit fs/jfs/jfs_logmgr.c:1819 [inline] lmLogInit+0x3d5/0x1a00 fs/jfs/jfs_logmgr.c:1267 open_inline_log fs/jfs/jfs_logmgr.c:1173 [inline] lmLogOpen+0x4e1/0xfa0 fs/jfs/jfs_logmgr.c:1067 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:1694 vfs_get_tree+0x92/0x2a0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3758 [inline] do_new_mount+0x341/0xd30 fs/namespace.c:3834 do_mount fs/namespace.c:4167 [inline] __do_sys_mount fs/namespace.c:4383 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4360 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5325: 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:2689 [inline] slab_free mm/slub.c:6250 [inline] kfree+0x1c5/0x640 mm/slub.c:6565 lbmLogShutdown fs/jfs/jfs_logmgr.c:1862 [inline] lmLogInit+0x1148/0x1a00 fs/jfs/jfs_logmgr.c:1413 open_inline_log fs/jfs/jfs_logmgr.c:1173 [inline] lmLogOpen+0x4e1/0xfa0 fs/jfs/jfs_logmgr.c:1067 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:1694 vfs_get_tree+0x92/0x2a0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3758 [inline] do_new_mount+0x341/0xd30 fs/namespace.c:3834 do_mount fs/namespace.c:4167 [inline] __do_sys_mount fs/namespace.c:4383 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4360 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88801f742700 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 24 bytes inside of freed 192-byte region [ffff88801f742700, ffff88801f7427c0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1f742 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801ac413c0 dead000000000100 dead000000000122 raw: 0000000000000000 0000000800100010 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 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5287, tgid 5287 (syz-executor), ts 102248451780, free_ts 101855679757 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858 prep_new_page mm/page_alloc.c:1866 [inline] get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 alloc_slab_page mm/slub.c:3278 [inline] allocate_slab+0x77/0x660 mm/slub.c:3467 new_slab mm/slub.c:3525 [inline] ___slab_alloc+0x154/0x6c0 mm/slub.c:4444 __slab_alloc_node mm/slub.c:4510 [inline] slab_alloc_node mm/slub.c:4886 [inline] __do_kmalloc_node mm/slub.c:5294 [inline] __kmalloc_node_noprof+0x309/0x7c0 mm/slub.c:5301 kmalloc_node_noprof include/linux/slab.h:1081 [inline] alloc_slab_obj_exts+0xbf/0x250 mm/slub.c:2171 __memcg_slab_post_alloc_hook+0x5c4/0xe80 mm/memcontrol.c:3475 memcg_slab_post_alloc_hook mm/slub.c:2461 [inline] slab_post_alloc_hook mm/slub.c:4580 [inline] slab_alloc_node mm/slub.c:4898 [inline] kmem_cache_alloc_lru_noprof+0x346/0x640 mm/slub.c:4917 __d_alloc+0x37/0x6f0 fs/dcache.c:1807 d_alloc_pseudo+0x21/0xc0 fs/dcache.c:1938 alloc_path_pseudo fs/file_table.c:405 [inline] alloc_file_pseudo+0xdd/0x240 fs/file_table.c:421 sock_alloc_file+0xb8/0x2e0 net/socket.c:543 sock_map_fd net/socket.c:573 [inline] __sys_socket+0x13c/0x1b0 net/socket.c:1815 __do_sys_socket net/socket.c:1820 [inline] __se_sys_socket net/socket.c:1818 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1818 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 page last free pid 75 tgid 75 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] free_unref_folios+0xcec/0x1480 mm/page_alloc.c:3004 shrink_folio_list+0x4a88/0x52a0 mm/vmscan.c:1585 evict_folios+0x4998/0x5ac0 mm/vmscan.c:4854 try_to_shrink_lruvec+0xbca/0x1050 mm/vmscan.c:5009 shrink_one+0x25c/0x710 mm/vmscan.c:5069 shrink_many mm/vmscan.c:5132 [inline] lru_gen_shrink_node mm/vmscan.c:5210 [inline] shrink_node+0x31bf/0x3ae0 mm/vmscan.c:6198 kswapd_shrink_node mm/vmscan.c:7052 [inline] balance_pgdat mm/vmscan.c:7228 [inline] kswapd+0x1736/0x2de0 mm/vmscan.c:7501 kthread+0x389/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 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: ffff88801f742600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88801f742680: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc >ffff88801f742700: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801f742780: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88801f742800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================