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BUG: KASAN: slab-out-of-bounds in __trace_probe_log_err+0x2ad/0x2b0 kernel/trace/trace_probe.c:199
Write of size 1 at addr ffff88810ae033ff by task syz-executor124/323

CPU: 0 PID: 323 Comm: syz-executor124 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x100/0x140 mm/kasan/report.c:452
 __asan_report_store1_noabort+0x17/0x20 mm/kasan/report_generic.c:311
 __trace_probe_log_err+0x2ad/0x2b0 kernel/trace/trace_probe.c:199
 trace_uprobe_create+0x355/0xb90 kernel/trace/trace_uprobe.c:588
 create_or_delete_trace_uprobe+0x89/0xc0 kernel/trace/trace_uprobe.c:731
 trace_run_command kernel/trace/trace.c:9575 [inline]
 trace_parse_run_command+0x296/0x450 kernel/trace/trace.c:9634
 probes_write+0x34/0x40 kernel/trace/trace_uprobe.c:800
 vfs_write+0x344/0xd70 fs/read_write.c:603
 ksys_write+0x14a/0x260 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:667
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fe84081cda9
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 0f 1f 44 00 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 d8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffd9286128 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 6e69636172742f2e RCX: 00007fe84081cda9
RDX: 000000000000000f RSI: 0000200000000180 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000007
R10: 0000000000000007 R11: 0000000000000246 R12: 00007fffd928614c
R13: 00007fffd9286180 R14: 00007fffd9286160 R15: 0000000000000003

Allocated by task 0:
(stack is not available)

Freed by task 22:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1600 [inline]
 slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1626
 slab_free mm/slub.c:3208 [inline]
 kfree+0xc0/0x270 mm/slub.c:4196
 create_path drivers/base/devtmpfs.c:203 [inline]
 handle_create drivers/base/devtmpfs.c:216 [inline]
 handle drivers/base/devtmpfs.c:384 [inline]
 devtmpfs_work_loop+0x883/0xdf0 drivers/base/devtmpfs.c:399
 devtmpfsd+0x49/0x50 drivers/base/devtmpfs.c:441
 kthread+0x324/0x3b0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

The buggy address belongs to the object at ffff88810ae033e0
 which belongs to the cache kmalloc-16 of size 16
The buggy address is located 15 bytes to the right of
 16-byte region [ffff88810ae033e0, ffff88810ae033f0)
The buggy address belongs to the page:
page:ffffea00042b80c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10ae03
flags: 0x4000000000000200(slab)
raw: 4000000000000200 ffffea000426a100 0000000f0000000f ffff888100043b00
raw: 0000000000000000 0000000080800080 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, ts 1815024094, free_ts 0
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x176/0x190 mm/page_alloc.c:2462
 get_page_from_freelist+0x225f/0x23f0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x29a/0x640 mm/page_alloc.c:5384
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1813 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1874
 new_slab_objects mm/slub.c:2632 [inline]
 ___slab_alloc+0x2f8/0x4c0 mm/slub.c:2796
 __slab_alloc+0x63/0xa0 mm/slub.c:2836
 slab_alloc_node mm/slub.c:2918 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 __kmalloc_track_caller+0x1e4/0x310 mm/slub.c:4541
 kvasprintf+0xe3/0x1a0 lib/kasprintf.c:25
 kvasprintf_const+0xf2/0x240 lib/kasprintf.c:49
 kobject_set_name_vargs+0x61/0x110 lib/kobject.c:297
 dev_set_name+0xdf/0x130 drivers/base/core.c:3059
 scsi_alloc_target+0x205/0xbd0 drivers/scsi/scsi_scan.c:446
 __scsi_scan_target+0x150/0xbf0 drivers/scsi/scsi_scan.c:1564
 scsi_scan_channel drivers/scsi/scsi_scan.c:1669 [inline]
 scsi_scan_host_selected+0x34e/0x600 drivers/scsi/scsi_scan.c:1698
 do_scsi_scan_host drivers/scsi/scsi_scan.c:1837 [inline]
 scsi_scan_host+0x39e/0x670 drivers/scsi/scsi_scan.c:1867
 virtscsi_probe+0x8f6/0xab0 drivers/scsi/virtio_scsi.c:915
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88810ae03280: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc
 ffff88810ae03300: 00 00 fc fc fb fb fc fc fb fb fc fc fa fb fc fc
>ffff88810ae03380: 00 00 fc fc fb fb fc fc fb fb fc fc fa fb fc fc
                                                                ^
 ffff88810ae03400: 00 00 fc fc 00 00 fc fc 00 00 fc fc fa fb fc fc
 ffff88810ae03480: 00 00 fc fc fb fb fc fc fb fb fc fc fb fb fc fc
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