[moderation] [mm?] KASAN: slab-use-after-free Read in isolate_migratepages_block
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syzbot
Aug 13, 2024, 12:47:24 PMAug 13
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: ee9a43b7cfe2 Merge tag 'net-6.11-rc3' of git://git.kernel...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14fb14d5980000
kernel config: https://syzkaller.appspot.com/x/.config?x=e8a2eef9745ade09
dashboard link: https://syzkaller.appspot.com/bug?extid=ffe2a60bcba7ecf8ad66
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
CC: [ak...@linux-foundation.org linux-...@vger.kernel.org linu...@kvack.org]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c1d7fad49ed6/disk-ee9a43b7.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/5ac6d6ec2714/vmlinux-ee9a43b7.xz
kernel image: https://storage.googleapis.com/syzbot-assets/73d9f4a3c06f/bzImage-ee9a43b7.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ffe2a6...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
BUG: KASAN: slab-use-after-free in mapping_inaccessible include/linux/pagemap.h:326 [inline]
BUG: KASAN: slab-use-after-free in isolate_migratepages_block+0x2228/0x64f0 mm/compaction.c:1210
Read of size 8 at addr ffff888020800b50 by task syz.1.774/8272
CPU: 1 UID: 0 PID: 8272 Comm: syz.1.774 Not tainted 6.11.0-rc2-syzkaller-00111-gee9a43b7cfe2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
mapping_inaccessible include/linux/pagemap.h:326 [inline]
isolate_migratepages_block+0x2228/0x64f0 mm/compaction.c:1210
isolate_migratepages mm/compaction.c:2194 [inline]
compact_zone+0x32e6/0x4af0 mm/compaction.c:2641
compact_node mm/compaction.c:2935 [inline]
compact_nodes mm/compaction.c:2957 [inline]
sysctl_compaction_handler+0x496/0x990 mm/compaction.c:3008
proc_sys_call_handler+0x551/0x8b0 fs/proc/proc_sysctl.c:590
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 fs/read_write.c:590
ksys_pwrite64 fs/read_write.c:705 [inline]
__do_sys_pwrite64 fs/read_write.c:715 [inline]
__se_sys_pwrite64 fs/read_write.c:712 [inline]
__x64_sys_pwrite64+0x1aa/0x230 fs/read_write.c:712
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f71719779f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f71727ad038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f7171b05f80 RCX: 00007f71719779f9
RDX: 0000000000000001 RSI: 0000000020000440 RDI: 0000000000000003
RBP: 00007f71719e58ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7171b05f80 R15: 00007f7171c2fa38
</TASK>
Allocated by task 27:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3988 [inline]
slab_alloc_node mm/slub.c:4037 [inline]
kmem_cache_alloc_lru_noprof+0x139/0x2b0 mm/slub.c:4056
shmem_alloc_inode+0x28/0x40 mm/shmem.c:4622
alloc_inode fs/inode.c:263 [inline]
new_inode_pseudo fs/inode.c:1038 [inline]
new_inode+0x6e/0x310 fs/inode.c:1057
__shmem_get_inode mm/shmem.c:2658 [inline]
shmem_get_inode+0x34a/0xd50 mm/shmem.c:2729
shmem_mknod+0x5f/0x1e0 mm/shmem.c:3426
vfs_mknod+0x36d/0x3b0 fs/namei.c:4088
handle_create drivers/base/devtmpfs.c:219 [inline]
handle drivers/base/devtmpfs.c:384 [inline]
devtmpfs_work_loop+0x963/0x1040 drivers/base/devtmpfs.c:399
devtmpfsd+0x4c/0x50 drivers/base/devtmpfs.c:441
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Freed by task 5348:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2252 [inline]
slab_free mm/slub.c:4473 [inline]
kmem_cache_free+0x145/0x350 mm/slub.c:4548
rcu_do_batch kernel/rcu/tree.c:2569 [inline]
rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2843
handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
do_softirq+0x11b/0x1e0 kernel/softirq.c:455
__local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
spin_unlock_bh include/linux/spinlock.h:396 [inline]
ptr_ring_consume_bh include/linux/ptr_ring.h:367 [inline]
wg_packet_encrypt_worker+0x2e8/0x1610 drivers/net/wireguard/send.c:293
process_one_work kernel/workqueue.c:3231 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Last potentially related work creation:
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
__kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541
__call_rcu_common kernel/rcu/tree.c:3106 [inline]
call_rcu+0x167/0xa70 kernel/rcu/tree.c:3210
do_unlinkat+0x512/0x830 fs/namei.c:4493
__do_sys_unlink fs/namei.c:4534 [inline]
__se_sys_unlink fs/namei.c:4532 [inline]
__x64_sys_unlink+0x47/0x50 fs/namei.c:4532
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888020800688
which belongs to the cache shmem_inode_cache of size 1544
The buggy address is located 1224 bytes inside of
freed 1544-byte region [ffff888020800688, ffff888020800c90)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888020807590 pfn:0x20800
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000040 ffff8880172e7140 ffffea0001a21a00 dead000000000002
raw: ffff888020807590 0000000000130001 00000001fdffffff 0000000000000000
head: 00fff00000000040 ffff8880172e7140 ffffea0001a21a00 dead000000000002
head: ffff888020807590 0000000000130001 00000001fdffffff 0000000000000000
head: 00fff00000000003 ffffea0000820001 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 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 1, tgid 1 (swapper/0), ts 8876656818, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493
prep_new_page mm/page_alloc.c:1501 [inline]
get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3442
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4700
__alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
alloc_slab_page+0x5f/0x120 mm/slub.c:2321
allocate_slab+0x5a/0x2f0 mm/slub.c:2484
new_slab mm/slub.c:2537 [inline]
___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723
__slab_alloc+0x58/0xa0 mm/slub.c:3813
__slab_alloc_node mm/slub.c:3866 [inline]
slab_alloc_node mm/slub.c:4025 [inline]
kmem_cache_alloc_lru_noprof+0x1c5/0x2b0 mm/slub.c:4056
shmem_alloc_inode+0x28/0x40 mm/shmem.c:4622
alloc_inode fs/inode.c:263 [inline]
new_inode_pseudo fs/inode.c:1038 [inline]
new_inode+0x6e/0x310 fs/inode.c:1057
__shmem_get_inode mm/shmem.c:2658 [inline]
shmem_get_inode+0x34a/0xd50 mm/shmem.c:2729
__shmem_file_setup+0x171/0x2c0 mm/shmem.c:5091
drm_gem_object_init+0x39/0x90 drivers/gpu/drm/drm_gem.c:132
__drm_gem_shmem_create+0x178/0x2e0 drivers/gpu/drm/drm_gem_shmem_helper.c:79
drm_gem_shmem_create drivers/gpu/drm/drm_gem_shmem_helper.c:126 [inline]
drm_gem_shmem_create_with_handle drivers/gpu/drm/drm_gem_shmem_helper.c:412 [inline]
drm_gem_shmem_dumb_create+0x252/0x400 drivers/gpu/drm/drm_gem_shmem_helper.c:508
drm_client_buffer_create drivers/gpu/drm/drm_client.c:298 [inline]
drm_client_framebuffer_create+0x1ff/0x8c0 drivers/gpu/drm/drm_client.c:517
page_owner free stack trace missing
Memory state around the buggy address:
ffff888020800a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888020800a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888020800b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888020800b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888020800c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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 report is already addressed, let syzbot know by replying with:
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If you want to overwrite report's subsystems, reply with:
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If the report is a duplicate of another one, reply with:
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If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: ee9a43b7cfe2 Merge tag 'net-6.11-rc3' of git://git.kernel...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14fb14d5980000
kernel config: https://syzkaller.appspot.com/x/.config?x=e8a2eef9745ade09
dashboard link: https://syzkaller.appspot.com/bug?extid=ffe2a60bcba7ecf8ad66
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
CC: [ak...@linux-foundation.org linux-...@vger.kernel.org linu...@kvack.org]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c1d7fad49ed6/disk-ee9a43b7.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/5ac6d6ec2714/vmlinux-ee9a43b7.xz
kernel image: https://storage.googleapis.com/syzbot-assets/73d9f4a3c06f/bzImage-ee9a43b7.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ffe2a6...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
BUG: KASAN: slab-use-after-free in mapping_inaccessible include/linux/pagemap.h:326 [inline]
BUG: KASAN: slab-use-after-free in isolate_migratepages_block+0x2228/0x64f0 mm/compaction.c:1210
Read of size 8 at addr ffff888020800b50 by task syz.1.774/8272
CPU: 1 UID: 0 PID: 8272 Comm: syz.1.774 Not tainted 6.11.0-rc2-syzkaller-00111-gee9a43b7cfe2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
mapping_inaccessible include/linux/pagemap.h:326 [inline]
isolate_migratepages_block+0x2228/0x64f0 mm/compaction.c:1210
isolate_migratepages mm/compaction.c:2194 [inline]
compact_zone+0x32e6/0x4af0 mm/compaction.c:2641
compact_node mm/compaction.c:2935 [inline]
compact_nodes mm/compaction.c:2957 [inline]
sysctl_compaction_handler+0x496/0x990 mm/compaction.c:3008
proc_sys_call_handler+0x551/0x8b0 fs/proc/proc_sysctl.c:590
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 fs/read_write.c:590
ksys_pwrite64 fs/read_write.c:705 [inline]
__do_sys_pwrite64 fs/read_write.c:715 [inline]
__se_sys_pwrite64 fs/read_write.c:712 [inline]
__x64_sys_pwrite64+0x1aa/0x230 fs/read_write.c:712
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f71719779f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f71727ad038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f7171b05f80 RCX: 00007f71719779f9
RDX: 0000000000000001 RSI: 0000000020000440 RDI: 0000000000000003
RBP: 00007f71719e58ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7171b05f80 R15: 00007f7171c2fa38
</TASK>
Allocated by task 27:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3988 [inline]
slab_alloc_node mm/slub.c:4037 [inline]
kmem_cache_alloc_lru_noprof+0x139/0x2b0 mm/slub.c:4056
shmem_alloc_inode+0x28/0x40 mm/shmem.c:4622
alloc_inode fs/inode.c:263 [inline]
new_inode_pseudo fs/inode.c:1038 [inline]
new_inode+0x6e/0x310 fs/inode.c:1057
__shmem_get_inode mm/shmem.c:2658 [inline]
shmem_get_inode+0x34a/0xd50 mm/shmem.c:2729
shmem_mknod+0x5f/0x1e0 mm/shmem.c:3426
vfs_mknod+0x36d/0x3b0 fs/namei.c:4088
handle_create drivers/base/devtmpfs.c:219 [inline]
handle drivers/base/devtmpfs.c:384 [inline]
devtmpfs_work_loop+0x963/0x1040 drivers/base/devtmpfs.c:399
devtmpfsd+0x4c/0x50 drivers/base/devtmpfs.c:441
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Freed by task 5348:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2252 [inline]
slab_free mm/slub.c:4473 [inline]
kmem_cache_free+0x145/0x350 mm/slub.c:4548
rcu_do_batch kernel/rcu/tree.c:2569 [inline]
rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2843
handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
do_softirq+0x11b/0x1e0 kernel/softirq.c:455
__local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
spin_unlock_bh include/linux/spinlock.h:396 [inline]
ptr_ring_consume_bh include/linux/ptr_ring.h:367 [inline]
wg_packet_encrypt_worker+0x2e8/0x1610 drivers/net/wireguard/send.c:293
process_one_work kernel/workqueue.c:3231 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Last potentially related work creation:
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
__kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541
__call_rcu_common kernel/rcu/tree.c:3106 [inline]
call_rcu+0x167/0xa70 kernel/rcu/tree.c:3210
do_unlinkat+0x512/0x830 fs/namei.c:4493
__do_sys_unlink fs/namei.c:4534 [inline]
__se_sys_unlink fs/namei.c:4532 [inline]
__x64_sys_unlink+0x47/0x50 fs/namei.c:4532
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888020800688
which belongs to the cache shmem_inode_cache of size 1544
The buggy address is located 1224 bytes inside of
freed 1544-byte region [ffff888020800688, ffff888020800c90)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888020807590 pfn:0x20800
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000040 ffff8880172e7140 ffffea0001a21a00 dead000000000002
raw: ffff888020807590 0000000000130001 00000001fdffffff 0000000000000000
head: 00fff00000000040 ffff8880172e7140 ffffea0001a21a00 dead000000000002
head: ffff888020807590 0000000000130001 00000001fdffffff 0000000000000000
head: 00fff00000000003 ffffea0000820001 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 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 1, tgid 1 (swapper/0), ts 8876656818, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493
prep_new_page mm/page_alloc.c:1501 [inline]
get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3442
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4700
__alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
alloc_slab_page+0x5f/0x120 mm/slub.c:2321
allocate_slab+0x5a/0x2f0 mm/slub.c:2484
new_slab mm/slub.c:2537 [inline]
___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723
__slab_alloc+0x58/0xa0 mm/slub.c:3813
__slab_alloc_node mm/slub.c:3866 [inline]
slab_alloc_node mm/slub.c:4025 [inline]
kmem_cache_alloc_lru_noprof+0x1c5/0x2b0 mm/slub.c:4056
shmem_alloc_inode+0x28/0x40 mm/shmem.c:4622
alloc_inode fs/inode.c:263 [inline]
new_inode_pseudo fs/inode.c:1038 [inline]
new_inode+0x6e/0x310 fs/inode.c:1057
__shmem_get_inode mm/shmem.c:2658 [inline]
shmem_get_inode+0x34a/0xd50 mm/shmem.c:2729
__shmem_file_setup+0x171/0x2c0 mm/shmem.c:5091
drm_gem_object_init+0x39/0x90 drivers/gpu/drm/drm_gem.c:132
__drm_gem_shmem_create+0x178/0x2e0 drivers/gpu/drm/drm_gem_shmem_helper.c:79
drm_gem_shmem_create drivers/gpu/drm/drm_gem_shmem_helper.c:126 [inline]
drm_gem_shmem_create_with_handle drivers/gpu/drm/drm_gem_shmem_helper.c:412 [inline]
drm_gem_shmem_dumb_create+0x252/0x400 drivers/gpu/drm/drm_gem_shmem_helper.c:508
drm_client_buffer_create drivers/gpu/drm/drm_client.c:298 [inline]
drm_client_framebuffer_create+0x1ff/0x8c0 drivers/gpu/drm/drm_client.c:517
page_owner free stack trace missing
Memory state around the buggy address:
ffff888020800a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888020800a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888020800b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888020800b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888020800c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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Dmitry Vyukov
Aug 23, 2024, 11:20:52 AMAug 23
to syzbot, syzkaller-upst...@googlegroups.com
#syz upstream
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