[v5.15] KASAN: use-after-free Read in kernfs_next_descendant_post
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syzbot
Oct 20, 2023, 9:26:14 AM10/20/23
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 00c03985402e Linux 5.15.136
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=17ece1d5680000
kernel config: https://syzkaller.appspot.com/x/.config?x=79895f3f9bd63186
dashboard link: https://syzkaller.appspot.com/bug?extid=7be0e893a355dad86be9
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/878303cc21ca/disk-00c03985.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/78f166268559/vmlinux-00c03985.xz
kernel image: https://storage.googleapis.com/syzbot-assets/509e05cddc3e/bzImage-00c03985.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7be0e8...@syzkaller.appspotmail.com
usb 4-1: Direct firmware load for ueagle-atm/eagleI.fw failed with error -2
usb 4-1: Falling back to sysfs fallback for: ueagle-atm/eagleI.fw
==================================================================
BUG: KASAN: use-after-free in kernfs_type include/linux/kernfs.h:294 [inline]
BUG: KASAN: use-after-free in kernfs_leftmost_descendant fs/kernfs/dir.c:1239 [inline]
BUG: KASAN: use-after-free in kernfs_next_descendant_post+0x184/0x200 fs/kernfs/dir.c:1270
Read of size 2 at addr ffff888083c4ec60 by task kworker/0:8/3598
CPU: 0 PID: 3598 Comm: kworker/0:8 Not tainted 5.15.136-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: events request_firmware_work_func
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
print_address_description+0x63/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
kernfs_type include/linux/kernfs.h:294 [inline]
kernfs_leftmost_descendant fs/kernfs/dir.c:1239 [inline]
kernfs_next_descendant_post+0x184/0x200 fs/kernfs/dir.c:1270
kernfs_activate+0x28/0x200 fs/kernfs/dir.c:1305
kernfs_add_one+0x4f3/0x640 fs/kernfs/dir.c:776
kernfs_create_dir_ns+0x1c0/0x230 fs/kernfs/dir.c:1003
sysfs_create_dir_ns+0x185/0x390 fs/sysfs/dir.c:59
create_dir lib/kobject.c:89 [inline]
kobject_add_internal+0x6e0/0xe00 lib/kobject.c:263
kobject_add_varg lib/kobject.c:398 [inline]
kobject_add+0x14e/0x210 lib/kobject.c:450
class_dir_create_and_add drivers/base/core.c:2948 [inline]
get_device_parent+0x391/0x400 drivers/base/core.c:3003
device_add+0x336/0xfd0 drivers/base/core.c:3315
fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:507 [inline]
fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:583 [inline]
firmware_fallback_sysfs+0x3f0/0xc90 drivers/base/firmware_loader/fallback.c:659
_request_firmware+0xbb1/0x1200 drivers/base/firmware_loader/main.c:848
request_firmware_work_func+0x126/0x270 drivers/base/firmware_loader/main.c:1097
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
Allocated by task 3598:
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_slab_alloc+0x8e/0xc0 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3220 [inline]
slab_alloc mm/slub.c:3228 [inline]
kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233
kmem_cache_zalloc include/linux/slab.h:711 [inline]
__kernfs_new_node+0xdb/0x750 fs/kernfs/dir.c:593
kernfs_new_node fs/kernfs/dir.c:657 [inline]
kernfs_create_dir_ns+0x90/0x230 fs/kernfs/dir.c:993
sysfs_create_dir_ns+0x185/0x390 fs/sysfs/dir.c:59
create_dir lib/kobject.c:89 [inline]
kobject_add_internal+0x6e0/0xe00 lib/kobject.c:263
kobject_add_varg lib/kobject.c:398 [inline]
kobject_add+0x14e/0x210 lib/kobject.c:450
class_dir_create_and_add drivers/base/core.c:2948 [inline]
get_device_parent+0x391/0x400 drivers/base/core.c:3003
device_add+0x336/0xfd0 drivers/base/core.c:3315
fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:507 [inline]
fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:583 [inline]
firmware_fallback_sysfs+0x3f0/0xc90 drivers/base/firmware_loader/fallback.c:659
_request_firmware+0xbb1/0x1200 drivers/base/firmware_loader/main.c:848
request_firmware_work_func+0x126/0x270 drivers/base/firmware_loader/main.c:1097
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Freed by task 6603:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1705 [inline]
slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kmem_cache_free+0x91/0x1f0 mm/slub.c:3515
kernfs_put+0x325/0x4a0 fs/kernfs/dir.c:547
__kernfs_remove+0x99e/0xc80 fs/kernfs/dir.c:1381
kernfs_remove+0x1d/0x30 fs/kernfs/dir.c:1394
__kobject_del+0xe2/0x310 lib/kobject.c:628
kobject_del+0x41/0x60 lib/kobject.c:651
device_del+0x9fe/0xbd0 drivers/base/core.c:3594
usb_disconnect+0x58f/0x8c0 drivers/usb/core/hub.c:2265
hub_port_connect drivers/usb/core/hub.c:5281 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5577 [inline]
port_event drivers/usb/core/hub.c:5723 [inline]
hub_event+0x1d58/0x54c0 drivers/usb/core/hub.c:5805
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
process_scheduled_works kernel/workqueue.c:2373 [inline]
worker_thread+0xdcf/0x1280 kernel/workqueue.c:2459
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
The buggy address belongs to the object at ffff888083c4ebc8
which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 152 bytes inside of
168-byte region [ffff888083c4ebc8, ffff888083c4ec70)
The buggy address belongs to the page:
page:ffffea00020f1380 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x83c4e
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 0000000000000000 0000000800000001 ffff888011dddb40
raw: 0000000000000000 0000000080110011 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 29530, ts 1218291826976, free_ts 1218290189090
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159
__alloc_pages+0x272/0x700 mm/page_alloc.c:5421
alloc_slab_page mm/slub.c:1775 [inline]
allocate_slab mm/slub.c:1912 [inline]
new_slab+0xbb/0x4b0 mm/slub.c:1975
___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
__slab_alloc mm/slub.c:3095 [inline]
slab_alloc_node mm/slub.c:3186 [inline]
slab_alloc mm/slub.c:3228 [inline]
kmem_cache_alloc+0x18e/0x280 mm/slub.c:3233
kmem_cache_zalloc include/linux/slab.h:711 [inline]
__kernfs_new_node+0xdb/0x750 fs/kernfs/dir.c:593
kernfs_new_node+0x95/0x160 fs/kernfs/dir.c:657
__kernfs_create_file+0x45/0x2e0 fs/kernfs/file.c:985
sysfs_add_file_mode_ns+0x308/0x3e0 fs/sysfs/file.c:317
create_files fs/sysfs/group.c:64 [inline]
internal_create_group+0x573/0xf00 fs/sysfs/group.c:149
loop_sysfs_init drivers/block/loop.c:909 [inline]
loop_configure+0xdd9/0x1470 drivers/block/loop.c:1304
lo_ioctl+0x933/0x23b0
blkdev_ioctl+0x333/0x6b0 block/ioctl.c:603
block_ioctl+0xb1/0xf0 block/fops.c:493
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396
tlb_batch_list_free mm/mmu_gather.c:61 [inline]
tlb_finish_mmu+0x249/0x320 mm/mmu_gather.c:341
unmap_region+0x304/0x350 mm/mmap.c:2668
__do_munmap+0x12db/0x1740 mm/mmap.c:2899
__vm_munmap+0x134/0x230 mm/mmap.c:2922
__do_sys_munmap mm/mmap.c:2948 [inline]
__se_sys_munmap mm/mmap.c:2944 [inline]
__x64_sys_munmap+0x67/0x70 mm/mmap.c:2944
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+0x61/0xcb
Memory state around the buggy address:
ffff888083c4eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888083c4eb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb
>ffff888083c4ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
^
ffff888083c4ec80: fc fc fc fc fc fc fb fb fb fb fb fb fb fb fb fb
ffff888083c4ed00: fb fb fb fb fb fb fb fb fb fb fb 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.
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If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite bug's subsystems, reply with:
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(See the list of subsystem names on the web dashboard)
If the bug is a duplicate of another bug, reply with:
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If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 00c03985402e Linux 5.15.136
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=17ece1d5680000
kernel config: https://syzkaller.appspot.com/x/.config?x=79895f3f9bd63186
dashboard link: https://syzkaller.appspot.com/bug?extid=7be0e893a355dad86be9
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/878303cc21ca/disk-00c03985.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/78f166268559/vmlinux-00c03985.xz
kernel image: https://storage.googleapis.com/syzbot-assets/509e05cddc3e/bzImage-00c03985.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7be0e8...@syzkaller.appspotmail.com
usb 4-1: Direct firmware load for ueagle-atm/eagleI.fw failed with error -2
usb 4-1: Falling back to sysfs fallback for: ueagle-atm/eagleI.fw
==================================================================
BUG: KASAN: use-after-free in kernfs_type include/linux/kernfs.h:294 [inline]
BUG: KASAN: use-after-free in kernfs_leftmost_descendant fs/kernfs/dir.c:1239 [inline]
BUG: KASAN: use-after-free in kernfs_next_descendant_post+0x184/0x200 fs/kernfs/dir.c:1270
Read of size 2 at addr ffff888083c4ec60 by task kworker/0:8/3598
CPU: 0 PID: 3598 Comm: kworker/0:8 Not tainted 5.15.136-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: events request_firmware_work_func
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
print_address_description+0x63/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
kernfs_type include/linux/kernfs.h:294 [inline]
kernfs_leftmost_descendant fs/kernfs/dir.c:1239 [inline]
kernfs_next_descendant_post+0x184/0x200 fs/kernfs/dir.c:1270
kernfs_activate+0x28/0x200 fs/kernfs/dir.c:1305
kernfs_add_one+0x4f3/0x640 fs/kernfs/dir.c:776
kernfs_create_dir_ns+0x1c0/0x230 fs/kernfs/dir.c:1003
sysfs_create_dir_ns+0x185/0x390 fs/sysfs/dir.c:59
create_dir lib/kobject.c:89 [inline]
kobject_add_internal+0x6e0/0xe00 lib/kobject.c:263
kobject_add_varg lib/kobject.c:398 [inline]
kobject_add+0x14e/0x210 lib/kobject.c:450
class_dir_create_and_add drivers/base/core.c:2948 [inline]
get_device_parent+0x391/0x400 drivers/base/core.c:3003
device_add+0x336/0xfd0 drivers/base/core.c:3315
fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:507 [inline]
fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:583 [inline]
firmware_fallback_sysfs+0x3f0/0xc90 drivers/base/firmware_loader/fallback.c:659
_request_firmware+0xbb1/0x1200 drivers/base/firmware_loader/main.c:848
request_firmware_work_func+0x126/0x270 drivers/base/firmware_loader/main.c:1097
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
Allocated by task 3598:
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_slab_alloc+0x8e/0xc0 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3220 [inline]
slab_alloc mm/slub.c:3228 [inline]
kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233
kmem_cache_zalloc include/linux/slab.h:711 [inline]
__kernfs_new_node+0xdb/0x750 fs/kernfs/dir.c:593
kernfs_new_node fs/kernfs/dir.c:657 [inline]
kernfs_create_dir_ns+0x90/0x230 fs/kernfs/dir.c:993
sysfs_create_dir_ns+0x185/0x390 fs/sysfs/dir.c:59
create_dir lib/kobject.c:89 [inline]
kobject_add_internal+0x6e0/0xe00 lib/kobject.c:263
kobject_add_varg lib/kobject.c:398 [inline]
kobject_add+0x14e/0x210 lib/kobject.c:450
class_dir_create_and_add drivers/base/core.c:2948 [inline]
get_device_parent+0x391/0x400 drivers/base/core.c:3003
device_add+0x336/0xfd0 drivers/base/core.c:3315
fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:507 [inline]
fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:583 [inline]
firmware_fallback_sysfs+0x3f0/0xc90 drivers/base/firmware_loader/fallback.c:659
_request_firmware+0xbb1/0x1200 drivers/base/firmware_loader/main.c:848
request_firmware_work_func+0x126/0x270 drivers/base/firmware_loader/main.c:1097
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Freed by task 6603:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1705 [inline]
slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kmem_cache_free+0x91/0x1f0 mm/slub.c:3515
kernfs_put+0x325/0x4a0 fs/kernfs/dir.c:547
__kernfs_remove+0x99e/0xc80 fs/kernfs/dir.c:1381
kernfs_remove+0x1d/0x30 fs/kernfs/dir.c:1394
__kobject_del+0xe2/0x310 lib/kobject.c:628
kobject_del+0x41/0x60 lib/kobject.c:651
device_del+0x9fe/0xbd0 drivers/base/core.c:3594
usb_disconnect+0x58f/0x8c0 drivers/usb/core/hub.c:2265
hub_port_connect drivers/usb/core/hub.c:5281 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5577 [inline]
port_event drivers/usb/core/hub.c:5723 [inline]
hub_event+0x1d58/0x54c0 drivers/usb/core/hub.c:5805
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
process_scheduled_works kernel/workqueue.c:2373 [inline]
worker_thread+0xdcf/0x1280 kernel/workqueue.c:2459
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
The buggy address belongs to the object at ffff888083c4ebc8
which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 152 bytes inside of
168-byte region [ffff888083c4ebc8, ffff888083c4ec70)
The buggy address belongs to the page:
page:ffffea00020f1380 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x83c4e
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 0000000000000000 0000000800000001 ffff888011dddb40
raw: 0000000000000000 0000000080110011 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 29530, ts 1218291826976, free_ts 1218290189090
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159
__alloc_pages+0x272/0x700 mm/page_alloc.c:5421
alloc_slab_page mm/slub.c:1775 [inline]
allocate_slab mm/slub.c:1912 [inline]
new_slab+0xbb/0x4b0 mm/slub.c:1975
___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
__slab_alloc mm/slub.c:3095 [inline]
slab_alloc_node mm/slub.c:3186 [inline]
slab_alloc mm/slub.c:3228 [inline]
kmem_cache_alloc+0x18e/0x280 mm/slub.c:3233
kmem_cache_zalloc include/linux/slab.h:711 [inline]
__kernfs_new_node+0xdb/0x750 fs/kernfs/dir.c:593
kernfs_new_node+0x95/0x160 fs/kernfs/dir.c:657
__kernfs_create_file+0x45/0x2e0 fs/kernfs/file.c:985
sysfs_add_file_mode_ns+0x308/0x3e0 fs/sysfs/file.c:317
create_files fs/sysfs/group.c:64 [inline]
internal_create_group+0x573/0xf00 fs/sysfs/group.c:149
loop_sysfs_init drivers/block/loop.c:909 [inline]
loop_configure+0xdd9/0x1470 drivers/block/loop.c:1304
lo_ioctl+0x933/0x23b0
blkdev_ioctl+0x333/0x6b0 block/ioctl.c:603
block_ioctl+0xb1/0xf0 block/fops.c:493
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396
tlb_batch_list_free mm/mmu_gather.c:61 [inline]
tlb_finish_mmu+0x249/0x320 mm/mmu_gather.c:341
unmap_region+0x304/0x350 mm/mmap.c:2668
__do_munmap+0x12db/0x1740 mm/mmap.c:2899
__vm_munmap+0x134/0x230 mm/mmap.c:2922
__do_sys_munmap mm/mmap.c:2948 [inline]
__se_sys_munmap mm/mmap.c:2944 [inline]
__x64_sys_munmap+0x67/0x70 mm/mmap.c:2944
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+0x61/0xcb
Memory state around the buggy address:
ffff888083c4eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888083c4eb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb
>ffff888083c4ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
^
ffff888083c4ec80: fc fc fc fc fc fc fb fb fb fb fb fb fb fb fb fb
ffff888083c4ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
==================================================================
---
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syzbot
Jan 28, 2024, 8:25:15 AMJan 28
to syzkaller...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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