[v5.15] KASAN: use-after-free Read in jfs_lazycommit
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syzbot
May 6, 2023, 8:04:01 AM5/6/23
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 8a7f2a5c5aa1 Linux 5.15.110
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=15cde67a280000
kernel config: https://syzkaller.appspot.com/x/.config?x=7e93d602da27af41
dashboard link: https://syzkaller.appspot.com/bug?extid=22c79e795372bfe8b681
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/16bea75b636d/disk-8a7f2a5c.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3b169e33dcf2/vmlinux-8a7f2a5c.xz
kernel image: https://storage.googleapis.com/syzbot-assets/190d08a00950/Image-8a7f2a5c.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+22c79e...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in jfs_lazycommit+0x658/0xa40 fs/jfs/jfs_txnmgr.c:2764
Read of size 4 at addr ffff0000c0b2aa94 by task jfsCommit/238
CPU: 1 PID: 238 Comm: jfsCommit Not tainted 5.15.110-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call trace:
dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x174/0x1e4 mm/kasan/report.c:451
__asan_report_load4_noabort+0x44/0x50 mm/kasan/report_generic.c:308
jfs_lazycommit+0x658/0xa40 fs/jfs/jfs_txnmgr.c:2764
kthread+0x37c/0x45c kernel/kthread.c:319
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
Allocated by task 11271:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc+0xbc/0xfc mm/kasan/common.c:513
__kasan_kmalloc+0x10/0x1c mm/kasan/common.c:522
kasan_kmalloc include/linux/kasan.h:264 [inline]
kmem_cache_alloc_trace+0x27c/0x47c mm/slub.c:3247
kmalloc include/linux/slab.h:591 [inline]
kzalloc include/linux/slab.h:721 [inline]
jfs_fill_super+0x108/0xa08 fs/jfs/super.c:500
mount_bdev+0x26c/0x368 fs/super.c:1378
jfs_do_mount+0x44/0x58 fs/jfs/super.c:675
legacy_get_tree+0xd4/0x16c fs/fs_context.c:610
vfs_get_tree+0x90/0x274 fs/super.c:1508
do_new_mount+0x25c/0x8c8 fs/namespace.c:2994
path_mount+0x590/0x104c fs/namespace.c:3324
do_mount fs/namespace.c:3337 [inline]
__do_sys_mount fs/namespace.c:3545 [inline]
__se_sys_mount fs/namespace.c:3522 [inline]
__arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3522
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Freed by task 3988:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4c/0x84 mm/kasan/common.c:46
kasan_set_free_info+0x28/0x4c mm/kasan/generic.c:360
____kasan_slab_free+0x118/0x164 mm/kasan/common.c:366
__kasan_slab_free+0x18/0x28 mm/kasan/common.c:374
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1705 [inline]
slab_free_freelist_hook+0x128/0x1ec mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kfree+0x178/0x410 mm/slub.c:4559
jfs_put_super+0x144/0x188 fs/jfs/super.c:203
generic_shutdown_super+0x130/0x29c fs/super.c:475
kill_block_super+0x70/0xdc fs/super.c:1405
deactivate_locked_super+0xb8/0x13c fs/super.c:335
deactivate_super+0x108/0x128 fs/super.c:366
cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143
__cleanup_mnt+0x20/0x30 fs/namespace.c:1150
task_work_run+0x130/0x1e4 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:597
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Last potentially related work creation:
kasan_save_stack+0x38/0x68 mm/kasan/common.c:38
kasan_record_aux_stack+0xd4/0x11c mm/kasan/generic.c:348
insert_work+0x64/0x394 kernel/workqueue.c:1362
__queue_work+0xb84/0x114c kernel/workqueue.c:1528
queue_work_on+0xc4/0x17c kernel/workqueue.c:1555
queue_work include/linux/workqueue.h:501 [inline]
loop_queue_work drivers/block/loop.c:1067 [inline]
loop_queue_rq+0x9a8/0xb20 drivers/block/loop.c:2201
__blk_mq_issue_directly block/blk-mq.c:1992 [inline]
__blk_mq_try_issue_directly+0x40c/0x6a0 block/blk-mq.c:2048
blk_mq_try_issue_directly+0x108/0x334 block/blk-mq.c:2079
blk_mq_submit_bio+0xf40/0x1ae0
__submit_bio+0x628/0x664 block/blk-core.c:923
__submit_bio_noacct_mq block/blk-core.c:1003 [inline]
submit_bio_noacct+0x680/0x7dc block/blk-core.c:1033
submit_bio+0x394/0x68c block/blk-core.c:1095
submit_bio_wait+0x108/0x210 block/bio.c:1229
hfsplus_submit_bio+0x334/0x3e8 fs/hfsplus/wrapper.c:89
hfsplus_sync_fs+0x43c/0x6e0 fs/hfsplus/super.c:222
hfsplus_put_super+0x114/0x2ec fs/hfsplus/super.c:295
generic_shutdown_super+0x130/0x29c fs/super.c:475
kill_block_super+0x70/0xdc fs/super.c:1405
deactivate_locked_super+0xb8/0x13c fs/super.c:335
deactivate_super+0x108/0x128 fs/super.c:366
cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143
__cleanup_mnt+0x20/0x30 fs/namespace.c:1150
task_work_run+0x130/0x1e4 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:597
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Second to last potentially related work creation:
kasan_save_stack+0x38/0x68 mm/kasan/common.c:38
kasan_record_aux_stack+0xd4/0x11c mm/kasan/generic.c:348
insert_work+0x64/0x394 kernel/workqueue.c:1362
__queue_work+0xb84/0x114c kernel/workqueue.c:1528
queue_work_on+0xc4/0x17c kernel/workqueue.c:1555
queue_work include/linux/workqueue.h:501 [inline]
loop_queue_work drivers/block/loop.c:1067 [inline]
loop_queue_rq+0x9a8/0xb20 drivers/block/loop.c:2201
__blk_mq_issue_directly block/blk-mq.c:1992 [inline]
__blk_mq_try_issue_directly+0x40c/0x6a0 block/blk-mq.c:2048
blk_mq_try_issue_directly+0x108/0x334 block/blk-mq.c:2079
blk_mq_submit_bio+0xf40/0x1ae0
__submit_bio+0x628/0x664 block/blk-core.c:923
__submit_bio_noacct_mq block/blk-core.c:1003 [inline]
submit_bio_noacct+0x680/0x7dc block/blk-core.c:1033
submit_bio+0x394/0x68c block/blk-core.c:1095
submit_bio_wait+0x108/0x210 block/bio.c:1229
hfsplus_submit_bio+0x334/0x3e8 fs/hfsplus/wrapper.c:89
hfsplus_sync_fs+0x43c/0x6e0 fs/hfsplus/super.c:222
sync_filesystem+0x1a0/0x218 fs/sync.c:66
generic_shutdown_super+0x70/0x29c fs/super.c:448
kill_block_super+0x70/0xdc fs/super.c:1405
deactivate_locked_super+0xb8/0x13c fs/super.c:335
deactivate_super+0x108/0x128 fs/super.c:366
cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143
__cleanup_mnt+0x20/0x30 fs/namespace.c:1150
task_work_run+0x130/0x1e4 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:597
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
The buggy address belongs to the object at ffff0000c0b2aa00
which belongs to the cache kmalloc-256 of size 256
The buggy address is located 148 bytes inside of
256-byte region [ffff0000c0b2aa00, ffff0000c0b2ab00)
The buggy address belongs to the page:
page:000000006641e606 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x100b2a
head:000000006641e606 order:1 compound_mapcount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 fffffc000337f900 0000000200000002 ffff0000c0002480
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff0000c0b2a980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff0000c0b2aa00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff0000c0b2aa80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff0000c0b2ab00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff0000c0b2ab80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to change bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 8a7f2a5c5aa1 Linux 5.15.110
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=15cde67a280000
kernel config: https://syzkaller.appspot.com/x/.config?x=7e93d602da27af41
dashboard link: https://syzkaller.appspot.com/bug?extid=22c79e795372bfe8b681
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/16bea75b636d/disk-8a7f2a5c.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3b169e33dcf2/vmlinux-8a7f2a5c.xz
kernel image: https://storage.googleapis.com/syzbot-assets/190d08a00950/Image-8a7f2a5c.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+22c79e...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in jfs_lazycommit+0x658/0xa40 fs/jfs/jfs_txnmgr.c:2764
Read of size 4 at addr ffff0000c0b2aa94 by task jfsCommit/238
CPU: 1 PID: 238 Comm: jfsCommit Not tainted 5.15.110-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call trace:
dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x174/0x1e4 mm/kasan/report.c:451
__asan_report_load4_noabort+0x44/0x50 mm/kasan/report_generic.c:308
jfs_lazycommit+0x658/0xa40 fs/jfs/jfs_txnmgr.c:2764
kthread+0x37c/0x45c kernel/kthread.c:319
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
Allocated by task 11271:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc+0xbc/0xfc mm/kasan/common.c:513
__kasan_kmalloc+0x10/0x1c mm/kasan/common.c:522
kasan_kmalloc include/linux/kasan.h:264 [inline]
kmem_cache_alloc_trace+0x27c/0x47c mm/slub.c:3247
kmalloc include/linux/slab.h:591 [inline]
kzalloc include/linux/slab.h:721 [inline]
jfs_fill_super+0x108/0xa08 fs/jfs/super.c:500
mount_bdev+0x26c/0x368 fs/super.c:1378
jfs_do_mount+0x44/0x58 fs/jfs/super.c:675
legacy_get_tree+0xd4/0x16c fs/fs_context.c:610
vfs_get_tree+0x90/0x274 fs/super.c:1508
do_new_mount+0x25c/0x8c8 fs/namespace.c:2994
path_mount+0x590/0x104c fs/namespace.c:3324
do_mount fs/namespace.c:3337 [inline]
__do_sys_mount fs/namespace.c:3545 [inline]
__se_sys_mount fs/namespace.c:3522 [inline]
__arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3522
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Freed by task 3988:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4c/0x84 mm/kasan/common.c:46
kasan_set_free_info+0x28/0x4c mm/kasan/generic.c:360
____kasan_slab_free+0x118/0x164 mm/kasan/common.c:366
__kasan_slab_free+0x18/0x28 mm/kasan/common.c:374
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1705 [inline]
slab_free_freelist_hook+0x128/0x1ec mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kfree+0x178/0x410 mm/slub.c:4559
jfs_put_super+0x144/0x188 fs/jfs/super.c:203
generic_shutdown_super+0x130/0x29c fs/super.c:475
kill_block_super+0x70/0xdc fs/super.c:1405
deactivate_locked_super+0xb8/0x13c fs/super.c:335
deactivate_super+0x108/0x128 fs/super.c:366
cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143
__cleanup_mnt+0x20/0x30 fs/namespace.c:1150
task_work_run+0x130/0x1e4 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:597
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Last potentially related work creation:
kasan_save_stack+0x38/0x68 mm/kasan/common.c:38
kasan_record_aux_stack+0xd4/0x11c mm/kasan/generic.c:348
insert_work+0x64/0x394 kernel/workqueue.c:1362
__queue_work+0xb84/0x114c kernel/workqueue.c:1528
queue_work_on+0xc4/0x17c kernel/workqueue.c:1555
queue_work include/linux/workqueue.h:501 [inline]
loop_queue_work drivers/block/loop.c:1067 [inline]
loop_queue_rq+0x9a8/0xb20 drivers/block/loop.c:2201
__blk_mq_issue_directly block/blk-mq.c:1992 [inline]
__blk_mq_try_issue_directly+0x40c/0x6a0 block/blk-mq.c:2048
blk_mq_try_issue_directly+0x108/0x334 block/blk-mq.c:2079
blk_mq_submit_bio+0xf40/0x1ae0
__submit_bio+0x628/0x664 block/blk-core.c:923
__submit_bio_noacct_mq block/blk-core.c:1003 [inline]
submit_bio_noacct+0x680/0x7dc block/blk-core.c:1033
submit_bio+0x394/0x68c block/blk-core.c:1095
submit_bio_wait+0x108/0x210 block/bio.c:1229
hfsplus_submit_bio+0x334/0x3e8 fs/hfsplus/wrapper.c:89
hfsplus_sync_fs+0x43c/0x6e0 fs/hfsplus/super.c:222
hfsplus_put_super+0x114/0x2ec fs/hfsplus/super.c:295
generic_shutdown_super+0x130/0x29c fs/super.c:475
kill_block_super+0x70/0xdc fs/super.c:1405
deactivate_locked_super+0xb8/0x13c fs/super.c:335
deactivate_super+0x108/0x128 fs/super.c:366
cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143
__cleanup_mnt+0x20/0x30 fs/namespace.c:1150
task_work_run+0x130/0x1e4 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:597
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Second to last potentially related work creation:
kasan_save_stack+0x38/0x68 mm/kasan/common.c:38
kasan_record_aux_stack+0xd4/0x11c mm/kasan/generic.c:348
insert_work+0x64/0x394 kernel/workqueue.c:1362
__queue_work+0xb84/0x114c kernel/workqueue.c:1528
queue_work_on+0xc4/0x17c kernel/workqueue.c:1555
queue_work include/linux/workqueue.h:501 [inline]
loop_queue_work drivers/block/loop.c:1067 [inline]
loop_queue_rq+0x9a8/0xb20 drivers/block/loop.c:2201
__blk_mq_issue_directly block/blk-mq.c:1992 [inline]
__blk_mq_try_issue_directly+0x40c/0x6a0 block/blk-mq.c:2048
blk_mq_try_issue_directly+0x108/0x334 block/blk-mq.c:2079
blk_mq_submit_bio+0xf40/0x1ae0
__submit_bio+0x628/0x664 block/blk-core.c:923
__submit_bio_noacct_mq block/blk-core.c:1003 [inline]
submit_bio_noacct+0x680/0x7dc block/blk-core.c:1033
submit_bio+0x394/0x68c block/blk-core.c:1095
submit_bio_wait+0x108/0x210 block/bio.c:1229
hfsplus_submit_bio+0x334/0x3e8 fs/hfsplus/wrapper.c:89
hfsplus_sync_fs+0x43c/0x6e0 fs/hfsplus/super.c:222
sync_filesystem+0x1a0/0x218 fs/sync.c:66
generic_shutdown_super+0x70/0x29c fs/super.c:448
kill_block_super+0x70/0xdc fs/super.c:1405
deactivate_locked_super+0xb8/0x13c fs/super.c:335
deactivate_super+0x108/0x128 fs/super.c:366
cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143
__cleanup_mnt+0x20/0x30 fs/namespace.c:1150
task_work_run+0x130/0x1e4 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:597
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
The buggy address belongs to the object at ffff0000c0b2aa00
which belongs to the cache kmalloc-256 of size 256
The buggy address is located 148 bytes inside of
256-byte region [ffff0000c0b2aa00, ffff0000c0b2ab00)
The buggy address belongs to the page:
page:000000006641e606 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x100b2a
head:000000006641e606 order:1 compound_mapcount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 fffffc000337f900 0000000200000002 ffff0000c0002480
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff0000c0b2a980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff0000c0b2aa00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff0000c0b2aa80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff0000c0b2ab00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff0000c0b2ab80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to change bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot
May 7, 2023, 10:33:49 AM5/7/23
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 8a7f2a5c5aa1 Linux 5.15.110
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=16b1e070280000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1348c522280000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/16bea75b636d/disk-8a7f2a5c.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3b169e33dcf2/vmlinux-8a7f2a5c.xz
kernel image: https://storage.googleapis.com/syzbot-assets/190d08a00950/Image-8a7f2a5c.gz.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/197150b6329b/mount_0.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+22c79e...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in jfs_lazycommit+0x658/0xa40 fs/jfs/jfs_txnmgr.c:2764
Read of size 4 at addr ffff0000c085e294 by task jfsCommit/240
CPU: 0 PID: 240 Comm: jfsCommit Not tainted 5.15.110-syzkaller #0
Freed by task 4009:
The buggy address belongs to the object at ffff0000c085e200
head:0000000055e36d24 order:1 compound_mapcount:0
ffff0000c085e200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff0000c085e280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff0000c085e300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff0000c085e380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
---
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.
HEAD commit: 8a7f2a5c5aa1 Linux 5.15.110
git tree: linux-5.15.y
kernel config: https://syzkaller.appspot.com/x/.config?x=7e93d602da27af41
dashboard link: https://syzkaller.appspot.com/bug?extid=22c79e795372bfe8b681
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15d7a990280000
dashboard link: https://syzkaller.appspot.com/bug?extid=22c79e795372bfe8b681
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1348c522280000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/16bea75b636d/disk-8a7f2a5c.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3b169e33dcf2/vmlinux-8a7f2a5c.xz
kernel image: https://storage.googleapis.com/syzbot-assets/190d08a00950/Image-8a7f2a5c.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+22c79e...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in jfs_lazycommit+0x658/0xa40 fs/jfs/jfs_txnmgr.c:2764
CPU: 0 PID: 240 Comm: jfsCommit Not tainted 5.15.110-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call trace:
dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x174/0x1e4 mm/kasan/report.c:451
__asan_report_load4_noabort+0x44/0x50 mm/kasan/report_generic.c:308
jfs_lazycommit+0x658/0xa40 fs/jfs/jfs_txnmgr.c:2764
kthread+0x37c/0x45c kernel/kthread.c:319
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
Allocated by task 4016:
Call trace:
dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x174/0x1e4 mm/kasan/report.c:451
__asan_report_load4_noabort+0x44/0x50 mm/kasan/report_generic.c:308
jfs_lazycommit+0x658/0xa40 fs/jfs/jfs_txnmgr.c:2764
kthread+0x37c/0x45c kernel/kthread.c:319
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
which belongs to the cache kmalloc-256 of size 256
The buggy address is located 148 bytes inside of
256-byte region [ffff0000c085e200, ffff0000c085e300)
The buggy address is located 148 bytes inside of
The buggy address belongs to the page:
page:0000000055e36d24 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10085e
head:0000000055e36d24 order:1 compound_mapcount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 dead000000000100 dead000000000122 ffff0000c0002480
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff0000c085e180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff0000c085e200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff0000c085e280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff0000c085e300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff0000c085e380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
---
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.
syzbot
May 7, 2023, 7:35:47 PM5/7/23
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: ca48fc16c493 Linux 6.1.27
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=166b3522280000
kernel config: https://syzkaller.appspot.com/x/.config?x=aea4bb7802570997
dashboard link: https://syzkaller.appspot.com/bug?extid=46e6acbe2a7c2c6facf8
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1137c75c280000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ec11c1903c52/disk-ca48fc16.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/8ce41c1ad391/vmlinux-ca48fc16.xz
kernel image: https://storage.googleapis.com/syzbot-assets/affba5631cad/Image-ca48fc16.gz.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/1fabc40e84bd/mount_0.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+46e6ac...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in jfs_lazycommit+0x644/0x988 fs/jfs/jfs_txnmgr.c:2730
Read of size 4 at addr ffff0000c40e2894 by task jfsCommit/90
CPU: 0 PID: 90 Comm: jfsCommit Not tainted 6.1.27-syzkaller #0
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
print_report+0x174/0x4c0 mm/kasan/report.c:395
kasan_report+0xd4/0x130 mm/kasan/report.c:495
__asan_report_load4_noabort+0x2c/0x38 mm/kasan/report_generic.c:350
jfs_lazycommit+0x644/0x988 fs/jfs/jfs_txnmgr.c:2730
kthread+0x250/0x2d8 kernel/kthread.c:376
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
Allocated by task 5452:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:211 [inline]
kmalloc_trace+0x7c/0x94 mm/slab_common.c:1050
kmalloc include/linux/slab.h:553 [inline]
kzalloc include/linux/slab.h:689 [inline]
jfs_fill_super+0x108/0x9f0 fs/jfs/super.c:495
mount_bdev+0x26c/0x368 fs/super.c:1423
jfs_do_mount+0x44/0x58 fs/jfs/super.c:670
legacy_get_tree+0xd4/0x16c fs/fs_context.c:610
vfs_get_tree+0x90/0x274 fs/super.c:1553
do_new_mount+0x25c/0x8c8 fs/namespace.c:3040
path_mount+0x590/0xe58 fs/namespace.c:3370
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount fs/namespace.c:3568 [inline]
__arm64_sys_mount+0x45c/0x594 fs/namespace.c:3568
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
Freed by task 4259:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:516
____kasan_slab_free+0x144/0x1c0 mm/kasan/common.c:236
__kasan_slab_free+0x18/0x28 mm/kasan/common.c:244
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook mm/slub.c:1750 [inline]
slab_free mm/slub.c:3661 [inline]
__kmem_cache_free+0x2c0/0x4b4 mm/slub.c:3674
kfree+0xcc/0x1b8 mm/slab_common.c:1007
jfs_put_super+0x144/0x188 fs/jfs/super.c:203
generic_shutdown_super+0x130/0x328 fs/super.c:501
kill_block_super+0x70/0xdc fs/super.c:1450
deactivate_locked_super+0xac/0x124 fs/super.c:332
deactivate_super+0xf0/0x110 fs/super.c:363
cleanup_mnt+0x394/0x41c fs/namespace.c:1186
__cleanup_mnt+0x20/0x30 fs/namespace.c:1193
task_work_run+0x240/0x2f0 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
do_notify_resume+0x2144/0x3470 arch/arm64/kernel/signal.c:1132
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
The buggy address belongs to the object at ffff0000c40e2800
The buggy address belongs to the physical page:
page:00000000f97a2f77 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1040e2
head:00000000f97a2f77 order:1 compound_mapcount:0 compound_pincount:0
ffff0000c40e2800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff0000c40e2880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff0000c40e2900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff0000c40e2980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
---
syzbot found the following issue on:
HEAD commit: ca48fc16c493 Linux 6.1.27
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=166b3522280000
kernel config: https://syzkaller.appspot.com/x/.config?x=aea4bb7802570997
dashboard link: https://syzkaller.appspot.com/bug?extid=46e6acbe2a7c2c6facf8
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=102d28ea280000
userspace arch: arm64
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1137c75c280000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ec11c1903c52/disk-ca48fc16.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/8ce41c1ad391/vmlinux-ca48fc16.xz
kernel image: https://storage.googleapis.com/syzbot-assets/affba5631cad/Image-ca48fc16.gz.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/1fabc40e84bd/mount_0.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
==================================================================
BUG: KASAN: use-after-free in jfs_lazycommit+0x644/0x988 fs/jfs/jfs_txnmgr.c:2730
Read of size 4 at addr ffff0000c40e2894 by task jfsCommit/90
CPU: 0 PID: 90 Comm: jfsCommit Not tainted 6.1.27-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call trace:
dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
Call trace:
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:284 [inline]
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
print_report+0x174/0x4c0 mm/kasan/report.c:395
kasan_report+0xd4/0x130 mm/kasan/report.c:495
__asan_report_load4_noabort+0x2c/0x38 mm/kasan/report_generic.c:350
jfs_lazycommit+0x644/0x988 fs/jfs/jfs_txnmgr.c:2730
kthread+0x250/0x2d8 kernel/kthread.c:376
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
Allocated by task 5452:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:211 [inline]
kmalloc_trace+0x7c/0x94 mm/slab_common.c:1050
kmalloc include/linux/slab.h:553 [inline]
kzalloc include/linux/slab.h:689 [inline]
jfs_fill_super+0x108/0x9f0 fs/jfs/super.c:495
mount_bdev+0x26c/0x368 fs/super.c:1423
jfs_do_mount+0x44/0x58 fs/jfs/super.c:670
legacy_get_tree+0xd4/0x16c fs/fs_context.c:610
vfs_get_tree+0x90/0x274 fs/super.c:1553
do_new_mount+0x25c/0x8c8 fs/namespace.c:3040
path_mount+0x590/0xe58 fs/namespace.c:3370
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount fs/namespace.c:3568 [inline]
__arm64_sys_mount+0x45c/0x594 fs/namespace.c:3568
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
Freed by task 4259:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:516
____kasan_slab_free+0x144/0x1c0 mm/kasan/common.c:236
__kasan_slab_free+0x18/0x28 mm/kasan/common.c:244
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook mm/slub.c:1750 [inline]
slab_free mm/slub.c:3661 [inline]
__kmem_cache_free+0x2c0/0x4b4 mm/slub.c:3674
kfree+0xcc/0x1b8 mm/slab_common.c:1007
jfs_put_super+0x144/0x188 fs/jfs/super.c:203
generic_shutdown_super+0x130/0x328 fs/super.c:501
kill_block_super+0x70/0xdc fs/super.c:1450
deactivate_locked_super+0xac/0x124 fs/super.c:332
deactivate_super+0xf0/0x110 fs/super.c:363
cleanup_mnt+0x394/0x41c fs/namespace.c:1186
__cleanup_mnt+0x20/0x30 fs/namespace.c:1193
task_work_run+0x240/0x2f0 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
do_notify_resume+0x2144/0x3470 arch/arm64/kernel/signal.c:1132
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
The buggy address belongs to the object at ffff0000c40e2800
which belongs to the cache kmalloc-256 of size 256
The buggy address is located 148 bytes inside of
256-byte region [ffff0000c40e2800, ffff0000c40e2900)
The buggy address is located 148 bytes inside of
The buggy address belongs to the physical page:
page:00000000f97a2f77 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1040e2
head:00000000f97a2f77 order:1 compound_mapcount:0 compound_pincount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 fffffc000325f700 dead000000000003 ffff0000c0002480
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff0000c40e2780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff0000c40e2800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff0000c40e2880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff0000c40e2900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff0000c40e2980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
---
This report is generated by a bot. It may contain errors.
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If the bug is already fixed, let syzbot know by replying with:
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If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title
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