syzbot


KASAN: invalid-free in diUnmount

Status: upstream: reported C repro on 2022/11/29 14:55
Reported-by: syzbot+90a11e6b1e810785c6ff@syzkaller.appspotmail.com
First crash: 67d, last: 23h48m

Cause bisection: failed (bisect log)

Sample crash report:
==================================================================
BUG: KASAN: double-free in slab_free mm/slub.c:3787 [inline]
BUG: KASAN: double-free in __kmem_cache_free+0x71/0x110 mm/slub.c:3800
Free of addr ffff88807bbb0000 by task syz-executor495/5078

CPU: 0 PID: 5078 Comm: syz-executor495 Not tainted 6.2.0-rc2-syzkaller-00313-g9b43a525db12 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106
 print_address_description+0x74/0x340 mm/kasan/report.c:306
 print_report+0x107/0x1f0 mm/kasan/report.c:417
 kasan_report_invalid_free+0xac/0xd0 mm/kasan/report.c:482
 ____kasan_slab_free+0xfb/0x120
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1781 [inline]
 slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1807
 slab_free mm/slub.c:3787 [inline]
 __kmem_cache_free+0x71/0x110 mm/slub.c:3800
 diUnmount+0xef/0x100 fs/jfs/jfs_imap.c:195
 jfs_umount+0x17c/0x3b0 fs/jfs/jfs_umount.c:63
 jfs_put_super+0x86/0x190 fs/jfs/super.c:194
 generic_shutdown_super+0x130/0x310 fs/super.c:492
 kill_block_super+0x79/0xd0 fs/super.c:1386
 deactivate_locked_super+0xa7/0xf0 fs/super.c:332
 cleanup_mnt+0x494/0x520 fs/namespace.c:1291
 task_work_run+0x243/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5c51c21387
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff68dcff18 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f5c51c21387
RDX: 00007fff68dcffd9 RSI: 000000000000000a RDI: 00007fff68dcffd0
RBP: 00007fff68dcffd0 R08: 00000000ffffffff R09: 00007fff68dcfdb0
R10: 0000555556046693 R11: 0000000000000206 R12: 00007fff68dd1090
R13: 00005555560465f0 R14: 00007fff68dcff40 R15: 00007fff68dd10d0
 </TASK>

Allocated by task 4432:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x3d/0x60 mm/kasan/common.c:52
 __kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:325
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slab.h:761 [inline]
 slab_alloc_node mm/slub.c:3452 [inline]
 slab_alloc mm/slub.c:3460 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3467 [inline]
 kmem_cache_alloc+0x1b3/0x350 mm/slub.c:3476
 getname_flags+0xb8/0x4e0 fs/namei.c:139
 do_sys_openat2+0xba/0x4e0 fs/open.c:1304
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_openat fs/open.c:1342 [inline]
 __se_sys_openat fs/open.c:1337 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1337
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 4432:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x3d/0x60 mm/kasan/common.c:52
 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:518
 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1781 [inline]
 slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1807
 slab_free mm/slub.c:3787 [inline]
 kmem_cache_free+0x94/0x1d0 mm/slub.c:3809
 do_sys_openat2+0x417/0x4e0 fs/open.c:1319
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_openat fs/open.c:1342 [inline]
 __se_sys_openat fs/open.c:1337 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1337
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff88807bbb0000
 which belongs to the cache names_cache of size 4096
The buggy address is located 0 bytes inside of
 4096-byte region [ffff88807bbb0000, ffff88807bbb1000)

The buggy address belongs to the physical page:
page:ffffea0001eeec00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7bbb0
head:ffffea0001eeec00 order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffff8880129eb640 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000070007 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 4432, tgid 4432 (udevd), ts 53913147594, free_ts 53900967707
 prep_new_page mm/page_alloc.c:2531 [inline]
 get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4283
 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549
 alloc_slab_page+0xbd/0x190 mm/slub.c:1851
 allocate_slab+0x5e/0x3c0 mm/slub.c:1998
 new_slab mm/slub.c:2051 [inline]
 ___slab_alloc+0x782/0xe20 mm/slub.c:3193
 __slab_alloc mm/slub.c:3292 [inline]
 __slab_alloc_node mm/slub.c:3345 [inline]
 slab_alloc_node mm/slub.c:3442 [inline]
 slab_alloc mm/slub.c:3460 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3467 [inline]
 kmem_cache_alloc+0x268/0x350 mm/slub.c:3476
 getname_flags+0xb8/0x4e0 fs/namei.c:139
 do_sys_openat2+0xba/0x4e0 fs/open.c:1304
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_openat fs/open.c:1342 [inline]
 __se_sys_openat fs/open.c:1337 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1337
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1446 [inline]
 free_pcp_prepare+0x751/0x780 mm/page_alloc.c:1496
 free_unref_page_prepare mm/page_alloc.c:3369 [inline]
 free_unref_page+0x19/0x4c0 mm/page_alloc.c:3464
 free_large_kmalloc+0xfb/0x190 mm/slab_common.c:945
 diMount+0x654/0x870 fs/jfs/jfs_imap.c:115
 jfs_mount_rw+0x33e/0x740 fs/jfs/jfs_mount.c:240
 jfs_remount+0x3db/0x710 fs/jfs/super.c:454
 reconfigure_super+0x3bc/0x7b0 fs/super.c:935
 vfs_fsconfig_locked fs/fsopen.c:254 [inline]
 __do_sys_fsconfig fs/fsopen.c:439 [inline]
 __se_sys_fsconfig+0xad5/0x1060 fs/fsopen.c:314
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffff88807bbaff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88807bbaff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88807bbb0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88807bbb0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807bbb0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Crashes (14):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci2-upstream-fs 2023/01/08 21:16 upstream 9b43a525db12 1dac8c7a .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] KASAN: invalid-free in diUnmount
ci2-upstream-fs 2023/01/08 19:17 upstream 9b43a525db12 1dac8c7a .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] KASAN: invalid-free in diUnmount
ci-upstream-kasan-gce-root 2023/01/01 14:24 upstream e4cf7c25bae5 ab32d508 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] KASAN: invalid-free in diUnmount
ci-upstream-kasan-gce-root 2022/12/17 07:02 upstream 77856d911a8c 05494336 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] KASAN: invalid-free in diUnmount
ci2-upstream-fs 2022/12/05 18:00 upstream 76dcd734eca2 045cbb84 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] KASAN: invalid-free in diUnmount
ci2-upstream-fs 2022/11/29 11:44 upstream ca57f02295f1 ca9683b8 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] KASAN: invalid-free in diUnmount
ci2-upstream-fs 2023/02/04 11:53 upstream 0136d86b7852 1b2f701a .config console log report info [disk image] [vmlinux] [kernel image] KASAN: invalid-free in diUnmount
ci-upstream-kasan-gce-root 2023/01/31 20:28 upstream 22b8077d0fce 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] KASAN: invalid-free in diUnmount
ci2-upstream-fs 2023/01/20 06:25 upstream 081edded9b38 71197f3a .config console log report info [disk image] [vmlinux] [kernel image] KASAN: invalid-free in diUnmount
ci2-upstream-fs 2023/01/11 18:54 upstream 7dd4b804e080 96166539 .config console log report info [disk image] [vmlinux] [kernel image] KASAN: invalid-free in diUnmount
ci2-upstream-fs 2022/12/19 00:01 upstream f9ff5644bcc0 05494336 .config console log report info [disk image] [vmlinux] [kernel image] KASAN: invalid-free in diUnmount
ci2-upstream-fs 2022/12/15 20:25 upstream 041fae9c105a 6f9c033e .config console log report info [disk image] [vmlinux] [kernel image] KASAN: invalid-free in diUnmount
ci2-upstream-fs 2022/12/05 13:07 upstream 0ba09b173387 e080de16 .config console log report info [disk image] [vmlinux] [kernel image] KASAN: invalid-free in diUnmount
ci-upstream-linux-next-kasan-gce-root 2022/12/18 05:09 linux-next ca39c4daa6f7 05494336 .config console log report info [disk image] [vmlinux] [kernel image] KASAN: invalid-free in diUnmount
* Struck through repros no longer work on HEAD.