================================================================== BUG: KASAN: slab-use-after-free in lbmIODone+0xed4/0x11f0 fs/jfs/jfs_logmgr.c:2184 Read of size 4 at addr ffff888025070668 by task ksoftirqd/1/22 CPU: 1 PID: 22 Comm: ksoftirqd/1 Not tainted 6.8.0-rc2-syzkaller-00397-g56897d51886f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc4/0x620 mm/kasan/report.c:488 kasan_report+0xda/0x110 mm/kasan/report.c:601 lbmIODone+0xed4/0x11f0 fs/jfs/jfs_logmgr.c:2184 bio_endio+0x59c/0x6b0 block/bio.c:1608 req_bio_endio block/blk-mq.c:792 [inline] blk_update_request+0x635/0x1710 block/blk-mq.c:937 blk_mq_end_request+0x4f/0x90 block/blk-mq.c:1060 lo_complete_rq+0x232/0x2f0 drivers/block/loop.c:366 blk_complete_reqs+0xae/0xf0 block/blk-mq.c:1135 __do_softirq+0x21c/0x8e7 kernel/softirq.c:553 run_ksoftirqd kernel/softirq.c:921 [inline] run_ksoftirqd+0x35/0x60 kernel/softirq.c:913 smpboot_thread_fn+0x669/0xa20 kernel/smpboot.c:164 kthread+0x2c6/0x3b0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242 Allocated by task 4880: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:372 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:389 kmalloc include/linux/slab.h:590 [inline] lbmLogInit fs/jfs/jfs_logmgr.c:1822 [inline] lmLogInit+0x3ec/0x1a90 fs/jfs/jfs_logmgr.c:1270 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline] lmLogOpen+0x7ea/0x1410 fs/jfs/jfs_logmgr.c:1069 jfs_mount_rw+0x2ea/0x700 fs/jfs/jfs_mount.c:257 jfs_fill_super+0x9d6/0xd20 fs/jfs/super.c:565 mount_bdev+0x1e3/0x2d0 fs/super.c:1663 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8f/0x380 fs/super.c:1784 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14ea/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __x64_sys_mount+0x297/0x320 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6f/0x77 Freed by task 5099: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:640 poison_slab_object mm/kasan/common.c:241 [inline] __kasan_slab_free+0x121/0x1c0 mm/kasan/common.c:257 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2121 [inline] slab_free mm/slub.c:4299 [inline] kfree+0x124/0x370 mm/slub.c:4409 lbmLogShutdown fs/jfs/jfs_logmgr.c:1865 [inline] lmLogShutdown+0x379/0x780 fs/jfs/jfs_logmgr.c:1684 lmLogClose+0x57b/0x710 fs/jfs/jfs_logmgr.c:1460 jfs_umount+0x2f0/0x440 fs/jfs/jfs_umount.c:114 jfs_put_super+0x88/0x1d0 fs/jfs/super.c:194 generic_shutdown_super+0x159/0x3d0 fs/super.c:646 kill_block_super+0x3b/0x90 fs/super.c:1680 deactivate_locked_super+0xbe/0x1a0 fs/super.c:477 deactivate_super+0xde/0x100 fs/super.c:510 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14f/0x250 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:108 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline] syscall_exit_to_user_mode+0x281/0x2b0 kernel/entry/common.c:212 do_syscall_64+0xe5/0x270 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x6f/0x77 The buggy address belongs to the object at ffff888025070660 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 8 bytes inside of freed 192-byte region [ffff888025070660, ffff888025070720) The buggy address belongs to the physical page: page:ffffea0000941c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x25070 flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000800 ffff888014c41a00 dead000000000100 dead000000000122 raw: 0000000000000000 00000000800f000f 00000001ffffffff 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 4150, tgid 4147 (syz-executor.0), ts 2255083480393, free_ts 2255076925756 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1533 prep_new_page mm/page_alloc.c:1540 [inline] get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3311 __alloc_pages+0x22f/0x2440 mm/page_alloc.c:4567 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2190 [inline] allocate_slab mm/slub.c:2354 [inline] new_slab+0xcc/0x3a0 mm/slub.c:2407 ___slab_alloc+0x4af/0x19a0 mm/slub.c:3540 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3625 __slab_alloc_node mm/slub.c:3678 [inline] slab_alloc_node mm/slub.c:3850 [inline] __do_kmalloc_node mm/slub.c:3980 [inline] __kmalloc_node_track_caller+0x35f/0x460 mm/slub.c:4001 __do_krealloc mm/slab_common.c:1187 [inline] krealloc+0x5d/0x100 mm/slab_common.c:1220 copy_array+0x89/0x110 kernel/bpf/verifier.c:1199 copy_verifier_state+0xa9/0xd50 kernel/bpf/verifier.c:1395 is_state_visited kernel/bpf/verifier.c:17197 [inline] do_check kernel/bpf/verifier.c:17358 [inline] do_check_common+0x4551/0xc590 kernel/bpf/verifier.c:20111 do_check_main kernel/bpf/verifier.c:20202 [inline] bpf_check+0x538c/0xa2a0 kernel/bpf/verifier.c:20850 bpf_prog_load+0x14e0/0x2300 kernel/bpf/syscall.c:2769 __sys_bpf+0xbfb/0x4a30 kernel/bpf/syscall.c:5457 __do_sys_bpf kernel/bpf/syscall.c:5561 [inline] __se_sys_bpf kernel/bpf/syscall.c:5559 [inline] __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5559 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83 page last free pid 4150 tgid 4147 stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1140 [inline] free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2346 free_unref_page+0x33/0x3c0 mm/page_alloc.c:2486 skb_free_frag include/linux/skbuff.h:3270 [inline] skb_free_head+0xa6/0x1b0 net/core/skbuff.c:996 skb_release_data+0x5c0/0x880 net/core/skbuff.c:1028 skb_release_all net/core/skbuff.c:1094 [inline] __kfree_skb+0x51/0x70 net/core/skbuff.c:1108 tcp_rcv_established+0xd72/0x20f0 net/ipv4/tcp_input.c:6080 tcp_v4_do_rcv+0x6ab/0xa50 net/ipv4/tcp_ipv4.c:1906 tcp_v4_rcv+0x388c/0x3b30 net/ipv4/tcp_ipv4.c:2329 ip_protocol_deliver_rcu+0xba/0x4e0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x2e4/0x520 net/ipv4/ip_input.c:233 NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip_local_deliver+0x18e/0x1f0 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:461 [inline] ip_sublist_rcv_finish+0x2c1/0x620 net/ipv4/ip_input.c:580 ip_list_rcv_finish.constprop.0+0x559/0x720 net/ipv4/ip_input.c:631 ip_sublist_rcv net/ipv4/ip_input.c:639 [inline] ip_list_rcv+0x339/0x450 net/ipv4/ip_input.c:674 __netif_receive_skb_list_ptype net/core/dev.c:5577 [inline] __netif_receive_skb_list_core+0x755/0x950 net/core/dev.c:5625 __netif_receive_skb_list net/core/dev.c:5677 [inline] netif_receive_skb_list_internal+0x769/0xe00 net/core/dev.c:5768 Memory state around the buggy address: ffff888025070500: fc fc fc fc fc fc fc fc fc fc fa fb fb fb fb fb ffff888025070580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888025070600: fb fb fc fc fc fc fc fc fc fc fc fc fa fb fb fb ^ ffff888025070680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888025070700: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fa fb ==================================================================