Message-ID: <0000000000008e20f7060050cab9@google.com>
Date:   Wed, 12 Jul 2023 14:20:55 -0700
From:   syzbot <syzbot+aca408372ef0b470a3d2@...kaller.appspotmail.com>
To:     axboe@...nel.dk, jfs-discussion@...ts.sourceforge.net,
        kch@...dia.com, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, shaggy@...nel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [jfs?] KASAN: use-after-free Read in lbmIODone (2)

syzbot has found a reproducer for the following issue on:

HEAD commit:    3f01e9fed845 Merge tag 'linux-watchdog-6.5-rc2' of git://w..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=100b43f2a80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=e75667d82b529c4f
dashboard link: https://syzkaller.appspot.com/bug?extid=aca408372ef0b470a3d2
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1102ca04a80000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-3f01e9fe.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0f8bd445f5c8/vmlinux-3f01e9fe.xz
kernel image: https://storage.googleapis.com/syzbot-assets/1af93256322d/bzImage-3f01e9fe.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/871b973dd9f9/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+aca408372ef0b470a3d2@...kaller.appspotmail.com

==================================================================
BUG: KASAN: slab-use-after-free in lbmIODone+0xeb7/0x11d0 fs/jfs/jfs_logmgr.c:2179
Read of size 4 at addr ffff888021c28708 by task ksoftirqd/1/27

CPU: 1 PID: 27 Comm: ksoftirqd/1 Not tainted 6.5.0-rc1-syzkaller-00006-g3f01e9fed845 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:364
 print_report mm/kasan/report.c:475 [inline]
 kasan_report+0x11d/0x130 mm/kasan/report.c:588
 lbmIODone+0xeb7/0x11d0 fs/jfs/jfs_logmgr.c:2179
 bio_endio+0x589/0x690 block/bio.c:1617
 req_bio_endio block/blk-mq.c:757 [inline]
 blk_update_request+0x5c5/0x1620 block/blk-mq.c:902
 blk_mq_end_request+0x59/0x680 block/blk-mq.c:1023
 lo_complete_rq+0x1c6/0x280 drivers/block/loop.c:370
 blk_complete_reqs+0xb3/0xf0 block/blk-mq.c:1101
 __do_softirq+0x1d4/0x905 kernel/softirq.c:553
 run_ksoftirqd kernel/softirq.c:921 [inline]
 run_ksoftirqd+0x31/0x60 kernel/softirq.c:913
 smpboot_thread_fn+0x659/0x9e0 kernel/smpboot.c:164
 kthread+0x344/0x440 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>

Allocated by task 8754:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 ____kasan_kmalloc mm/kasan/common.c:333 [inline]
 __kasan_kmalloc+0xa3/0xb0 mm/kasan/common.c:383
 kmalloc include/linux/slab.h:582 [inline]
 lbmLogInit fs/jfs/jfs_logmgr.c:1822 [inline]
 lmLogInit+0x3b3/0x1a50 fs/jfs/jfs_logmgr.c:1270
 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline]
 lmLogOpen+0x7db/0x1430 fs/jfs/jfs_logmgr.c:1069
 jfs_mount_rw+0x2ed/0x6d0 fs/jfs/jfs_mount.c:257
 jfs_fill_super+0xa00/0xd40 fs/jfs/super.c:565
 mount_bdev+0x315/0x3e0 fs/super.c:1391
 legacy_get_tree+0x109/0x220 fs/fs_context.c:611
 vfs_get_tree+0x8d/0x350 fs/super.c:1519
 do_new_mount fs/namespace.c:3335 [inline]
 path_mount+0x136e/0x1e70 fs/namespace.c:3662
 do_mount fs/namespace.c:3675 [inline]
 __do_sys_mount fs/namespace.c:3884 [inline]
 __se_sys_mount fs/namespace.c:3861 [inline]
 __x64_sys_mount+0x283/0x300 fs/namespace.c:3861
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 5245:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522
 ____kasan_slab_free mm/kasan/common.c:236 [inline]
 ____kasan_slab_free+0x13b/0x1a0 mm/kasan/common.c:200
 kasan_slab_free include/linux/kasan.h:162 [inline]
 __cache_free mm/slab.c:3370 [inline]
 __do_kmem_cache_free mm/slab.c:3557 [inline]
 __kmem_cache_free+0xcd/0x2c0 mm/slab.c:3564
 lbmLogShutdown fs/jfs/jfs_logmgr.c:1865 [inline]
 lmLogShutdown+0x349/0x6e0 fs/jfs/jfs_logmgr.c:1684
 lmLogClose+0x588/0x720 fs/jfs/jfs_logmgr.c:1460
 jfs_umount+0x2ef/0x430 fs/jfs/jfs_umount.c:114
 jfs_put_super+0x85/0x1d0 fs/jfs/super.c:194
 generic_shutdown_super+0x158/0x480 fs/super.c:499
 kill_block_super+0x64/0xb0 fs/super.c:1417
 deactivate_locked_super+0x98/0x160 fs/super.c:330
 deactivate_super+0xb1/0xd0 fs/super.c:361
 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1254
 task_work_run+0x16f/0x270 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Last potentially related work creation:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 __kasan_record_aux_stack+0x78/0x80 mm/kasan/generic.c:492
 insert_work+0x48/0x360 kernel/workqueue.c:1553
 __queue_work+0x625/0x1120 kernel/workqueue.c:1714
 queue_work_on+0xf2/0x110 kernel/workqueue.c:1744
 queue_work include/linux/workqueue.h:506 [inline]
 netdevice_queue_work drivers/infiniband/core/roce_gid_mgmt.c:659 [inline]
 netdevice_event+0x6dd/0x9c0 drivers/infiniband/core/roce_gid_mgmt.c:802
 notifier_call_chain+0xb6/0x3c0 kernel/notifier.c:93
 call_netdevice_notifiers_info+0xb9/0x130 net/core/dev.c:1962
 call_netdevice_notifiers_extack net/core/dev.c:2000 [inline]
 call_netdevice_notifiers net/core/dev.c:2014 [inline]
 dev_set_mac_address+0x355/0x480 net/core/dev.c:8793
 dev_set_mac_address_user+0x31/0x50 net/core/dev.c:8807
 do_setlink+0x1871/0x3ae0 net/core/rtnetlink.c:2815
 __rtnl_newlink+0xd85/0x1860 net/core/rtnetlink.c:3655
 rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3702
 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6424
 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2549
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1914
 sock_sendmsg_nosec net/socket.c:725 [inline]
 sock_sendmsg+0xde/0x190 net/socket.c:748
 __sys_sendto+0x254/0x350 net/socket.c:2134
 __do_sys_sendto net/socket.c:2146 [inline]
 __se_sys_sendto net/socket.c:2142 [inline]
 __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2142
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Second to last potentially related work creation:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 __kasan_record_aux_stack+0x78/0x80 mm/kasan/generic.c:492
 insert_work+0x48/0x360 kernel/workqueue.c:1553
 __queue_work+0x625/0x1120 kernel/workqueue.c:1714
 queue_work_on+0xf2/0x110 kernel/workqueue.c:1744
 queue_work include/linux/workqueue.h:506 [inline]
 call_usermodehelper_exec+0x1d2/0x4c0 kernel/umh.c:434
 kobject_uevent_env+0xefc/0x16c0 lib/kobject_uevent.c:618
 netdev_queue_add_kobject net/core/net-sysfs.c:1705 [inline]
 netdev_queue_update_kobjects+0x3d5/0x4f0 net/core/net-sysfs.c:1746
 register_queue_kobjects net/core/net-sysfs.c:1807 [inline]
 netdev_register_kobject+0x334/0x400 net/core/net-sysfs.c:2047
 register_netdevice+0xd77/0x1640 net/core/dev.c:10051
 bond_create+0xb8/0x120 drivers/net/bonding/bond_main.c:6399
 bonding_init+0xda/0x130 drivers/net/bonding/bond_main.c:6483
 do_one_initcall+0x105/0x630 init/main.c:1232
 do_initcall_level init/main.c:1294 [inline]
 do_initcalls init/main.c:1310 [inline]
 do_basic_setup init/main.c:1329 [inline]
 kernel_init_freeable+0x64e/0xba0 init/main.c:1546
 kernel_init+0x1e/0x2c0 init/main.c:1437
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

The buggy address belongs to the object at ffff888021c28700
 which belongs to the cache kmalloc-192 of size 192
The buggy address is located 8 bytes inside of
 freed 192-byte region [ffff888021c28700, ffff888021c287c0)

The buggy address belongs to the physical page:
page:ffffea0000870a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x21c28
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0x10()
raw: 00fff00000000200 ffff888012840000 ffffea000057b110 ffffea0000791b90
raw: 0000000000000000 ffff888021c28000 0000000100000010 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 0x2420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_THISNODE), pid 1, tgid 1 (swapper/0), ts 7886758406, free_ts 7883285032
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1570
 prep_new_page mm/page_alloc.c:1577 [inline]
 get_page_from_freelist+0xfed/0x2d30 mm/page_alloc.c:3221
 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4477
 __alloc_pages_node include/linux/gfp.h:237 [inline]
 kmem_getpages mm/slab.c:1356 [inline]
 cache_grow_begin+0x9b/0x3b0 mm/slab.c:2550
 cache_alloc_refill+0x289/0x3a0 mm/slab.c:2923
 ____cache_alloc mm/slab.c:2999 [inline]
 ____cache_alloc mm/slab.c:2982 [inline]
 __do_cache_alloc mm/slab.c:3182 [inline]
 slab_alloc_node mm/slab.c:3230 [inline]
 __kmem_cache_alloc_node+0x392/0x410 mm/slab.c:3521
 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1076
 kmalloc include/linux/slab.h:582 [inline]
 kzalloc include/linux/slab.h:703 [inline]
 call_usermodehelper_setup+0x9c/0x340 kernel/umh.c:363
 kobject_uevent_env+0xedd/0x16c0 lib/kobject_uevent.c:614
 rx_queue_add_kobject net/core/net-sysfs.c:1102 [inline]
 net_rx_queue_update_kobjects+0x1b0/0x640 net/core/net-sysfs.c:1142
 register_queue_kobjects net/core/net-sysfs.c:1802 [inline]
 netdev_register_kobject+0x279/0x400 net/core/net-sysfs.c:2047
 register_netdevice+0xd77/0x1640 net/core/dev.c:10051
 bond_create+0xb8/0x120 drivers/net/bonding/bond_main.c:6399
 bonding_init+0xda/0x130 drivers/net/bonding/bond_main.c:6483
 do_one_initcall+0x105/0x630 init/main.c:1232
 do_initcall_level init/main.c:1294 [inline]
 do_initcalls init/main.c:1310 [inline]
 do_basic_setup init/main.c:1329 [inline]
 kernel_init_freeable+0x64e/0xba0 init/main.c:1546
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1161 [inline]
 free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2348
 free_unref_page+0x33/0x370 mm/page_alloc.c:2443
 rcu_do_batch kernel/rcu/tree.c:2135 [inline]
 rcu_core+0x802/0x1c10 kernel/rcu/tree.c:2399
 __do_softirq+0x1d4/0x905 kernel/softirq.c:553

Memory state around the buggy address:
 ffff888021c28600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888021c28680: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888021c28700: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff888021c28780: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888021c28800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================


---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

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