BUG: scheduling while atomic: syz.2.17/384/0x00000002
Modules linked in:
CPU: 1 UID: 0 PID: 384 Comm: syz.2.17 Not tainted syzkaller #0 c4896d72d1fb51cdc6291d08376a37fd8080d7bb
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 __schedule_bug+0x12b/0x200 kernel/sched/core.c:6626
 schedule_debug kernel/sched/core.c:6653 [inline]
 __schedule+0xb85/0x20b0 kernel/sched/core.c:7697
 __schedule_loop kernel/sched/core.c:7957 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7972
 schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:8029
 rwsem_down_write_slowpath+0x5c9/0x1b60 kernel/locking/rwsem.c:1239
 __down_write_common kernel/locking/rwsem.c:1383 [inline]
 __down_write kernel/locking/rwsem.c:1392 [inline]
 down_write+0x163/0x2b0 kernel/locking/rwsem.c:1659
 kernfs_remove_by_name_ns+0x8c/0x180 fs/kernfs/dir.c:1737
 kernfs_remove_by_name include/linux/kernfs.h:637 [inline]
 sysfs_unmerge_group+0xd7/0x130 fs/sysfs/group.c:399
 dpm_sysfs_remove+0x8a/0xd0 drivers/base/power/sysfs.c:836
 device_del+0x241/0xcf0 drivers/base/core.c:3856
 device_unregister drivers/base/core.c:3922 [inline]
 device_destroy+0xb0/0x100 drivers/base/core.c:4521
 android_device_destroy+0x118/0x180 drivers/usb/gadget/android_configfs_uevent.c:223
 gadgets_drop+0x1d/0x30 drivers/usb/gadget/configfs.c:2075
 client_drop_item fs/configfs/dir.c:943 [inline]
 configfs_rmdir+0x8b7/0x9b0 fs/configfs/dir.c:1546
 vfs_rmdir+0x3de/0x560 fs/namei.c:4348
 do_rmdir+0x29a/0x590 fs/namei.c:4407
 __do_sys_rmdir fs/namei.c:4426 [inline]
 __se_sys_rmdir fs/namei.c:4424 [inline]
 __x64_sys_rmdir+0x4b/0x60 fs/namei.c:4424
 x64_sys_call+0xaf7/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:85
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7faa38d9e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffd2fe93d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00007faa39025fa0 RCX: 00007faa38d9e0d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000900
RBP: 00007faa38e35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faa39025fac R14: 00007faa39025fa0 R15: 00007faa39025fa0
 </TASK>
------------[ cut here ]------------
WARNING: CPU: 0 PID: 384 at lib/stackdepot.c:635 stack_depot_save_flags+0x266/0x800 lib/stackdepot.c:633
Modules linked in:
CPU: 0 UID: 0 PID: 384 Comm: syz.2.17 Tainted: G        W          syzkaller #0 c4896d72d1fb51cdc6291d08376a37fd8080d7bb
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:stack_depot_save_flags+0x266/0x800 lib/stackdepot.c:635
Code: 48 83 3d 74 22 dc 05 00 0f 84 00 04 00 00 48 c7 45 c0 00 00 00 00 48 89 d3 65 8b 05 8c a3 1e 7d 4d 89 d7 a9 00 00 f0 00 74 2d <0f> 0b 48 c7 45 c8 00 00 00 00 9c 8f 45 c8 4c 8b 6d c8 fa 48 c7 c7
RSP: 0018:ffffc90001b0f980 EFLAGS: 00010206
RAX: 000000007fffffff RBX: ffff8881f5b1bb20 RCX: 000000000091bb20
RDX: ffff8881f5b1bb20 RSI: 0000000000000001 RDI: 00000000cf4c43ef
RBP: ffffc90001b0f9e0 R08: 000000002db18559 R09: 000000005a9c8e38
R10: 000000000000000d R11: ffffffff81759ed0 R12: 00000000afd91bb2
R13: 0000000000000000 R14: ffffc90001b0f9f0 R15: 000000000000000d
FS:  000055555bd24500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005592f8d42200 CR3: 0000000115cb4000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 kasan_save_stack mm/kasan/common.c:50 [inline]
 kasan_save_track+0x4f/0x80 mm/kasan/common.c:70
 kasan_save_free_info+0x44/0x50 mm/kasan/generic.c:579
 poison_slab_object mm/kasan/common.c:249 [inline]
 __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:266
 kasan_slab_free include/linux/kasan.h:234 [inline]
 slab_free_hook mm/slub.c:2445 [inline]
 slab_free mm/slub.c:4714 [inline]
 kfree+0x158/0x440 mm/slub.c:4875
 gadget_info_attr_release+0xcb/0x130 drivers/usb/gadget/configfs.c:412
 config_item_cleanup fs/configfs/item.c:128 [inline]
 config_item_release fs/configfs/item.c:137 [inline]
 kref_put include/linux/kref.h:65 [inline]
 config_item_put+0x178/0x240 fs/configfs/item.c:149
 configfs_rmdir+0x8e8/0x9b0 fs/configfs/dir.c:1550
 vfs_rmdir+0x3de/0x560 fs/namei.c:4348
 do_rmdir+0x29a/0x590 fs/namei.c:4407
 __do_sys_rmdir fs/namei.c:4426 [inline]
 __se_sys_rmdir fs/namei.c:4424 [inline]
 __x64_sys_rmdir+0x4b/0x60 fs/namei.c:4424
 x64_sys_call+0xaf7/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:85
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7faa38d9e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffd2fe93d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00007faa39025fa0 RCX: 00007faa38d9e0d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000900
RBP: 00007faa38e35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faa39025fac R14: 00007faa39025fa0 R15: 00007faa39025fa0
 </TASK>
---[ end trace 0000000000000000 ]---
BUG: scheduling while atomic: syz.2.17/384/0x00000000
Modules linked in:
CPU: 1 UID: 0 PID: 384 Comm: syz.2.17 Tainted: G        W          syzkaller #0 c4896d72d1fb51cdc6291d08376a37fd8080d7bb
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 UID: 0 PID: 384 Comm: syz.2.17 Tainted: G        W          syzkaller #0 c4896d72d1fb51cdc6291d08376a37fd8080d7bb
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:schedule_debug kernel/sched/core.c:6636 [inline]
RIP: 0010:__schedule+0x14e/0x20b0 kernel/sched/core.c:7697
Code: 00 00 48 89 04 24 4c 8d 70 20 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 ac 52 3b fc 4d 8b 36 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 93 52 3b fc 49 81 3e 9d 6e ac 57
RSP: 0018:ffffc90001b0f680 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8881f6f4fa40 RCX: ffff88810d30cc00
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc90001b0f850 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff92000361ee8
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff1103edea0c9
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faa38c70000 CR3: 00000000074aa000 CR4: 00000000003526b0
Call Trace:
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:schedule_debug kernel/sched/core.c:6636 [inline]
RIP: 0010:__schedule+0x14e/0x20b0 kernel/sched/core.c:7697
Code: 00 00 48 89 04 24 4c 8d 70 20 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 ac 52 3b fc 4d 8b 36 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 93 52 3b fc 49 81 3e 9d 6e ac 57
RSP: 0018:ffffc90001b0f680 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8881f6f4fa40 RCX: ffff88810d30cc00
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc90001b0f850 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff92000361ee8
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff1103edea0c9
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faa38c70000 CR3: 00000000074aa000 CR4: 00000000003526b0
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	48 89 04 24          	mov    %rax,(%rsp)
   6:	4c 8d 70 20          	lea    0x20(%rax),%r14
   a:	4c 89 f0             	mov    %r14,%rax
   d:	48 c1 e8 03          	shr    $0x3,%rax
  11:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
  16:	74 08                	je     0x20
  18:	4c 89 f7             	mov    %r14,%rdi
  1b:	e8 ac 52 3b fc       	call   0xfc3b52cc
  20:	4d 8b 36             	mov    (%r14),%r14
  23:	4c 89 f0             	mov    %r14,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 f7             	mov    %r14,%rdi
  34:	e8 93 52 3b fc       	call   0xfc3b52cc
  39:	49 81 3e 9d 6e ac 57 	cmpq   $0x57ac6e9d,(%r14)