syzbot


KASAN: slab-use-after-free Read in jfs_syncpt

Status: upstream: reported C repro on 2024/02/07 09:29
Subsystems: jfs
[Documentation on labels]
Reported-by: syzbot+c244f4a09ca85dd2ebc1@syzkaller.appspotmail.com
First crash: 74d, last: 48m
Discussions (2)
Title Replies (including bot) Last reply
[PATCH] jfs: fix uaf in jfs_syncpt 3 (3) 2024/02/20 06:17
[syzbot] [jfs?] KASAN: slab-use-after-free Read in jfs_syncpt 2 (6) 2024/02/20 03:45
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 KASAN: use-after-free Read in jfs_syncpt 2 62d 63d 0/3 upstream: reported on 2024/02/13 19:07
linux-6.1 KASAN: use-after-free Read in jfs_syncpt 1 4d03h 4d03h 0/3 upstream: reported on 2024/04/12 18:15
Last patch testing requests (3)
Created Duration User Patch Repo Result
2024/03/03 00:08 16m retest repro upstream report log
2024/02/20 03:23 20m eadavis@qq.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master OK log
2024/02/20 02:39 24m eadavis@qq.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log

Sample crash report:
==================================================================
BUG: KASAN: slab-use-after-free in __mutex_waiter_is_first kernel/locking/mutex.c:197 [inline]
BUG: KASAN: slab-use-after-free in __mutex_lock_common kernel/locking/mutex.c:686 [inline]
BUG: KASAN: slab-use-after-free in __mutex_lock+0x8f4/0x9d0 kernel/locking/mutex.c:752
Read of size 8 at addr ffff8880272d2908 by task jfsCommit/131

CPU: 3 PID: 131 Comm: jfsCommit Not tainted 6.8.0-rc4-syzkaller-00388-gced590523156 #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+0xd9/0x1b0 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
 __mutex_waiter_is_first kernel/locking/mutex.c:197 [inline]
 __mutex_lock_common kernel/locking/mutex.c:686 [inline]
 __mutex_lock+0x8f4/0x9d0 kernel/locking/mutex.c:752
 jfs_syncpt+0x2a/0xa0 fs/jfs/jfs_logmgr.c:1039
 txEnd+0x30d/0x5a0 fs/jfs/jfs_txnmgr.c:549
 txLazyCommit fs/jfs/jfs_txnmgr.c:2684 [inline]
 jfs_lazycommit+0x77d/0xb20 fs/jfs/jfs_txnmgr.c:2733
 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
 </TASK>

Allocated by task 5178:
 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]
 kzalloc include/linux/slab.h:711 [inline]
 open_inline_log fs/jfs/jfs_logmgr.c:1159 [inline]
 lmLogOpen+0x571/0x1410 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 5177:
 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
 lmLogClose+0x585/0x710 fs/jfs/jfs_logmgr.c:1461
 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 ffff8880272d2800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 264 bytes inside of
 freed 1024-byte region [ffff8880272d2800, ffff8880272d2c00)

The buggy address belongs to the physical page:
page:ffffea00009cb400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x272d0
head:ffffea00009cb400 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888014c42dc0 dead000000000100 dead000000000122
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4910, tgid 4910 (dhcpcd-run-hook), ts 31763109865, free_ts 31737584223
 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+0x3b8/0x440 mm/slub.c:3994
 kmalloc include/linux/slab.h:594 [inline]
 load_elf_phdrs+0x103/0x210 fs/binfmt_elf.c:526
 load_elf_binary+0x14dc/0x4e40 fs/binfmt_elf.c:955
 search_binary_handler fs/exec.c:1783 [inline]
 exec_binprm fs/exec.c:1825 [inline]
 bprm_execve fs/exec.c:1877 [inline]
 bprm_execve+0x70a/0x1980 fs/exec.c:1853
 do_execveat_common.isra.0+0x5cf/0x750 fs/exec.c:1984
 do_execve fs/exec.c:2058 [inline]
 __do_sys_execve fs/exec.c:2134 [inline]
 __se_sys_execve fs/exec.c:2129 [inline]
 __x64_sys_execve+0x8c/0xb0 fs/exec.c:2129
 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
page last free pid 4909 tgid 4909 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
 qlink_free mm/kasan/quarantine.c:160 [inline]
 qlist_free_all+0x58/0x150 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:324
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3813 [inline]
 slab_alloc_node mm/slub.c:3860 [inline]
 kmem_cache_alloc+0x136/0x320 mm/slub.c:3867
 getname_flags.part.0+0x50/0x4f0 fs/namei.c:140
 getname_flags include/linux/audit.h:322 [inline]
 getname+0x90/0xe0 fs/namei.c:219
 do_sys_openat2+0x104/0x1e0 fs/open.c:1398
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_openat fs/open.c:1435 [inline]
 __se_sys_openat fs/open.c:1430 [inline]
 __x64_sys_openat+0x175/0x210 fs/open.c:1430
 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

Memory state around the buggy address:
 ffff8880272d2800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880272d2880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880272d2900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff8880272d2980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880272d2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Crashes (14):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/02/18 00:05 upstream ced590523156 578f7538 .config console log report syz C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-qemu-upstream KASAN: slab-use-after-free Read in jfs_syncpt
2024/04/13 07:53 upstream fe46a7dd189e c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: slab-use-after-free Read in jfs_syncpt
2024/02/02 15:31 upstream 021533194476 60bf9982 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-use-after-free Read in jfs_syncpt
2024/04/14 21:09 upstream 72374d71c315 c8349e48 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: slab-use-after-free Read in jfs_syncpt
2024/04/13 12:44 upstream 8f2c057754b2 c8349e48 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: slab-use-after-free Read in jfs_syncpt
2024/04/13 05:37 upstream 8f2c057754b2 c8349e48 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: slab-use-after-free Read in jfs_syncpt
2024/04/11 23:03 upstream 00dcf5d862e8 27de0a5c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: slab-use-after-free Read in jfs_syncpt
2024/04/11 11:43 upstream e8c39d0f57f3 3023abf0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: slab-use-after-free Read in jfs_syncpt
2024/04/06 11:38 upstream 6c6e47d69d82 ca620dd8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: slab-use-after-free Read in jfs_syncpt
2024/02/15 03:15 upstream 8d3dea210042 d9b1cdd5 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: slab-use-after-free Read in jfs_syncpt
2024/02/12 03:44 upstream 841c35169323 77b23aa1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: slab-use-after-free Read in jfs_syncpt
2024/04/16 20:51 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci b5d2afe8745b 18f6e127 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: slab-use-after-free Read in jfs_syncpt
2024/04/16 01:44 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci b5d2afe8745b 0d592ce4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: slab-use-after-free Read in jfs_syncpt
2024/04/05 01:03 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 0ee3535e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: slab-use-after-free Read in jfs_syncpt
* Struck through repros no longer work on HEAD.