[syzbot] [fs?] [mm?] WARNING: bad unlock balance in hugetlb_vmdelete_list

[syzbot] [fs?] [mm?] WARNING: bad unlock balance in hugetlb_vmdelete_list

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    846bd2225ec3 Add linux-next specific files for 20250919
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=13263534580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=135377594f35b576
dashboard link: https://syzkaller.appspot.com/bug?extid=62edf7e27b2e8f754525
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14a118e2580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17e204e2580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c53d48022f8a/disk-846bd222.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/483534e784c8/vmlinux-846bd222.xz
kernel image: https://storage.googleapis.com/syzbot-assets/721b36eec9b3/bzImage-846bd222.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+62edf7e27b2e8f754525@syzkaller.appspotmail.com

=====================================
WARNING: bad unlock balance detected!
syzkaller #0 Not tainted
-------------------------------------
syz.0.8060/30977 is trying to release lock (&vma_lock->rw_sema) at:
[<ffffffff82903959>] hugetlb_vmdelete_list+0x179/0x1c0 fs/hugetlbfs/inode.c:501
but there are no more locks to release!

other info that might help us debug this:
3 locks held by syz.0.8060/30977:
 #0: ffff88807d8da420 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:508
 #1: ffff888034404648 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: inode_lock_killable include/linux/fs.h:985 [inline]
 #1: ffff888034404648 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: do_truncate+0x171/0x220 fs/open.c:63
 #2: ffff888034404918 (&hugetlbfs_i_mmap_rwsem_key){+.+.}-{4:4}, at: i_mmap_lock_write include/linux/fs.h:548 [inline]
 #2: ffff888034404918 (&hugetlbfs_i_mmap_rwsem_key){+.+.}-{4:4}, at: hugetlb_vmtruncate fs/hugetlbfs/inode.c:639 [inline]
 #2: ffff888034404918 (&hugetlbfs_i_mmap_rwsem_key){+.+.}-{4:4}, at: hugetlbfs_setattr+0x489/0x6d0 fs/hugetlbfs/inode.c:879

stack backtrace:
CPU: 1 UID: 0 PID: 30977 Comm: syz.0.8060 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_unlock_imbalance_bug+0xdc/0xf0 kernel/locking/lockdep.c:5298
 __lock_release kernel/locking/lockdep.c:5537 [inline]
 lock_release+0x269/0x3e0 kernel/locking/lockdep.c:5889
 up_write+0x2d/0x420 kernel/locking/rwsem.c:1642
 hugetlb_vmdelete_list+0x179/0x1c0 fs/hugetlbfs/inode.c:501
 hugetlb_vmtruncate fs/hugetlbfs/inode.c:641 [inline]
 hugetlbfs_setattr+0x4d1/0x6d0 fs/hugetlbfs/inode.c:879
 notify_change+0xc1a/0xf40 fs/attr.c:546
 do_truncate+0x1a4/0x220 fs/open.c:68
 handle_truncate fs/namei.c:3516 [inline]
 do_open fs/namei.c:3899 [inline]
 path_openat+0x306c/0x3830 fs/namei.c:4054
 do_filp_open+0x1fa/0x410 fs/namei.c:4081
 do_sys_openat2+0x121/0x1c0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_open fs/open.c:1458 [inline]
 __se_sys_open fs/open.c:1454 [inline]
 __x64_sys_open+0x11e/0x150 fs/open.c:1454
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdea5b8eec9
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:00007fdea6945038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fdea5de5fa0 RCX: 00007fdea5b8eec9
RDX: 0000000000000100 RSI: 000000000014927e RDI: 0000200000000340
RBP: 00007fdea5c11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdea5de6038 R14: 00007fdea5de5fa0 R15: 00007ffe42e704f8
 </TASK>
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff8880295a5408, owner = 0x1, curr 0xffff8880260d9e40, list empty
WARNING: kernel/locking/rwsem.c:1381 at __up_write kernel/locking/rwsem.c:1380 [inline], CPU#1: syz.0.8060/30977
WARNING: kernel/locking/rwsem.c:1381 at up_write+0x3a2/0x420 kernel/locking/rwsem.c:1643, CPU#1: syz.0.8060/30977
Modules linked in:
CPU: 1 UID: 0 PID: 30977 Comm: syz.0.8060 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__up_write kernel/locking/rwsem.c:1380 [inline]
RIP: 0010:up_write+0x3a2/0x420 kernel/locking/rwsem.c:1643
Code: d0 48 c7 c7 00 f0 aa 8b 48 c7 c6 20 f2 aa 8b 48 8b 14 24 4c 89 f1 4d 89 e0 4c 8b 4c 24 08 41 52 e8 b3 39 e6 ff 48 83 c4 08 90 <0f> 0b 90 90 e9 6d fd ff ff 48 c7 c1 74 0b e5 8f 80 e1 07 80 c1 03
RSP: 0018:ffffc900051076c8 EFLAGS: 00010282
RAX: b37f99c54516e500 RBX: ffff8880295a5408 RCX: ffff8880260d9e40
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: dffffc0000000000 R08: ffffc900051073e7 R09: 1ffff92000a20e7c
R10: dffffc0000000000 R11: fffff52000a20e7d R12: 0000000000000001
R13: ffff8880295a5460 R14: ffff8880295a5408 R15: 1ffff110052b4a82
FS:  00007fdea69456c0(0000) GS:ffff8881258a2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdea51fed58 CR3: 00000000779ba000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 hugetlb_vmdelete_list+0x179/0x1c0 fs/hugetlbfs/inode.c:501
 hugetlb_vmtruncate fs/hugetlbfs/inode.c:641 [inline]
 hugetlbfs_setattr+0x4d1/0x6d0 fs/hugetlbfs/inode.c:879
 notify_change+0xc1a/0xf40 fs/attr.c:546
 do_truncate+0x1a4/0x220 fs/open.c:68
 handle_truncate fs/namei.c:3516 [inline]
 do_open fs/namei.c:3899 [inline]
 path_openat+0x306c/0x3830 fs/namei.c:4054
 do_filp_open+0x1fa/0x410 fs/namei.c:4081
 do_sys_openat2+0x121/0x1c0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_open fs/open.c:1458 [inline]
 __se_sys_open fs/open.c:1454 [inline]
 __x64_sys_open+0x11e/0x150 fs/open.c:1454
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdea5b8eec9
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:00007fdea6945038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fdea5de5fa0 RCX: 00007fdea5b8eec9
RDX: 0000000000000100 RSI: 000000000014927e RDI: 0000200000000340
RBP: 00007fdea5c11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdea5de6038 R14: 00007fdea5de5fa0 R15: 00007ffe42e704f8
 </TASK>


---
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If the report is already addressed, let syzbot know by replying with:
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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.

If you want to overwrite report's subsystems, reply with:
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(See the list of subsystem names on the web dashboard)

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

Re: [syzbot] [fs?] [mm?] WARNING: bad unlock balance in hugetlb_vmdelete_list

[syzbot]

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
WARNING in hugetlb_vma_assert_locked

------------[ cut here ]------------
WARNING: mm/hugetlb.c:368 at hugetlb_vma_assert_locked+0x1dd/0x250 mm/hugetlb.c:368, CPU#1: syz.0.28/6594
Modules linked in:
CPU: 1 UID: 0 PID: 6594 Comm: syz.0.28 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:hugetlb_vma_assert_locked+0x1dd/0x250 mm/hugetlb.c:368
Code: 2e e8 97 6e a1 ff eb 0c e8 90 6e a1 ff eb 05 e8 89 6e a1 ff 5b 41 5c 41 5d 41 5e 41 5f 5d e9 da 41 6a 09 cc e8 74 6e a1 ff 90 <0f> 0b 90 eb e5 e8 69 6e a1 ff 90 0f 0b 90 eb da 48 c7 c1 70 7c e4
RSP: 0018:ffffc90003637368 EFLAGS: 00010293
RAX: ffffffff821f22cc RBX: 0000000000000000 RCX: ffff888030330000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520006c6e70 R12: ffff888026856500
R13: 1ffff1100bd744fc R14: dffffc0000000000 R15: 0000000000000080
FS:  00007fb2310906c0(0000) GS:ffff8881258c5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb23108ff98 CR3: 0000000075cce000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 huge_pmd_unshare+0x2c8/0x540 mm/hugetlb.c:7622
 __unmap_hugepage_range+0x6e3/0x1aa0 mm/hugetlb.c:5901
 unmap_hugepage_range+0x32e/0x410 mm/hugetlb.c:6089
 hugetlb_vmdelete_list+0x189/0x1f0 fs/hugetlbfs/inode.c:495
 hugetlb_vmtruncate fs/hugetlbfs/inode.c:643 [inline]
 hugetlbfs_setattr+0x4d1/0x6d0 fs/hugetlbfs/inode.c:881
 notify_change+0xc1a/0xf40 fs/attr.c:546
 do_truncate+0x1a4/0x220 fs/open.c:68
 handle_truncate fs/namei.c:3516 [inline]
 do_open fs/namei.c:3899 [inline]
 path_openat+0x306c/0x3830 fs/namei.c:4054
 do_filp_open+0x1fa/0x410 fs/namei.c:4081
 do_sys_openat2+0x121/0x1c0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_open fs/open.c:1460 [inline]
 __se_sys_open fs/open.c:1456 [inline]
 __x64_sys_open+0x11e/0x150 fs/open.c:1456
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb23018eec9
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:00007fb231090038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fb2303e5fa0 RCX: 00007fb23018eec9
RDX: 0000000000000100 RSI: 000000000014927e RDI: 0000200000000340
RBP: 00007fb230211f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb2303e6038 R14: 00007fb2303e5fa0 R15: 00007fff95fa5748
 </TASK>


Tested on:

commit:         ce7f1a98 Add linux-next specific files for 20250923
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=129a4d34580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=1be6fa3d47bce66e
dashboard link: https://syzkaller.appspot.com/bug?extid=62edf7e27b2e8f754525
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=17b2cce2580000

Re: [syzbot] [fs?] [mm?] WARNING: bad unlock balance in hugetlb_vmdelete_list

[syzbot]

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
WARNING in hugetlb_vma_assert_locked

------------[ cut here ]------------
WARNING: mm/hugetlb.c:368 at hugetlb_vma_assert_locked+0x1dd/0x250 mm/hugetlb.c:368, CPU#0: syz.0.2369/13821
Modules linked in:
CPU: 0 UID: 0 PID: 13821 Comm: syz.0.2369 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:hugetlb_vma_assert_locked+0x1dd/0x250 mm/hugetlb.c:368
Code: 2e e8 e7 42 a1 ff eb 0c e8 e0 42 a1 ff eb 05 e8 d9 42 a1 ff 5b 41 5c 41 5d 41 5e 41 5f 5d e9 9a a0 6a 09 cc e8 c4 42 a1 ff 90 <0f> 0b 90 eb e5 e8 b9 42 a1 ff 90 0f 0b 90 eb da 48 c7 c1 70 b5 e4
RSP: 0018:ffffc9000c487368 EFLAGS: 00010293
RAX: ffffffff821f540c RBX: 0000000000000000 RCX: ffff88805edc1e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001890e70 R12: ffff88814d805d00
R13: 1ffff1100d65a80c R14: dffffc0000000000 R15: 0000000000000080
FS:  00007f73df6f86c0(0000) GS:ffff8881257be000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31963fff CR3: 000000002f73a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 huge_pmd_unshare+0x2c8/0x540 mm/hugetlb.c:7622
 __unmap_hugepage_range+0x6e3/0x1aa0 mm/hugetlb.c:5901
 unmap_hugepage_range+0x32e/0x410 mm/hugetlb.c:6089
 hugetlb_vmdelete_list+0x264/0x310 fs/hugetlbfs/inode.c:517
 hugetlb_vmtruncate fs/hugetlbfs/inode.c:667 [inline]
 hugetlbfs_setattr+0x4d1/0x6d0 fs/hugetlbfs/inode.c:905
 notify_change+0xc1a/0xf40 fs/attr.c:546
 do_truncate+0x1a4/0x220 fs/open.c:68
 handle_truncate fs/namei.c:3596 [inline]
 do_open fs/namei.c:3979 [inline]
 path_openat+0x306c/0x3830 fs/namei.c:4134
 do_filp_open+0x1fa/0x410 fs/namei.c:4161
 do_sys_openat2+0x121/0x1c0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_open fs/open.c:1460 [inline]
 __se_sys_open fs/open.c:1456 [inline]
 __x64_sys_open+0x11e/0x150 fs/open.c:1456
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f73de78eec9
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:00007f73df6f8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f73de9e5fa0 RCX: 00007f73de78eec9
RDX: 0000000000000100 RSI: 000000000014927e RDI: 0000200000000340
RBP: 00007f73de811f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f73de9e6038 R14: 00007f73de9e5fa0 R15: 00007ffe0f23a218
 </TASK>


Tested on:

commit:         b5a4da2c Add linux-next specific files for 20250924
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=156434e2580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=841973c5ab4f4157
dashboard link: https://syzkaller.appspot.com/bug?extid=62edf7e27b2e8f754525
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=114ced34580000

Re: [syzbot] [fs?] [mm?] WARNING: bad unlock balance in hugetlb_vmdelete_list

[syzbot]

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
WARNING in hugetlb_vma_assert_locked

------------[ cut here ]------------
WARNING: mm/hugetlb.c:368 at hugetlb_vma_assert_locked+0x1dd/0x250 mm/hugetlb.c:368, CPU#0: syz.0.41/6582
Modules linked in:
CPU: 0 UID: 0 PID: 6582 Comm: syz.0.41 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:hugetlb_vma_assert_locked+0x1dd/0x250 mm/hugetlb.c:368
Code: 2e e8 e7 42 a1 ff eb 0c e8 e0 42 a1 ff eb 05 e8 d9 42 a1 ff 5b 41 5c 41 5d 41 5e 41 5f 5d e9 9a a0 6a 09 cc e8 c4 42 a1 ff 90 <0f> 0b 90 eb e5 e8 b9 42 a1 ff 90 0f 0b 90 eb da 48 c7 c1 70 b5 e4
RSP: 0018:ffffc9000217f388 EFLAGS: 00010293
RAX: ffffffff821f540c RBX: 0000000000000000 RCX: ffff88807af68000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200042fe74 R12: ffff88805df6aa00
R13: 1ffff110064fdfc4 R14: dffffc0000000000 R15: 0000000000000080
FS:  00007fc7b46136c0(0000) GS:ffff8881257be000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc7b45f2d58 CR3: 0000000077790000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 huge_pmd_unshare+0x2c8/0x540 mm/hugetlb.c:7622
 __unmap_hugepage_range+0x6e3/0x1aa0 mm/hugetlb.c:5901
 unmap_hugepage_range+0x32e/0x410 mm/hugetlb.c:6089
 hugetlb_vmdelete_list+0x171/0x1c0 fs/hugetlbfs/inode.c:494
 hugetlb_vmtruncate fs/hugetlbfs/inode.c:641 [inline]
 hugetlbfs_setattr+0x4d1/0x6d0 fs/hugetlbfs/inode.c:879
 notify_change+0xc1a/0xf40 fs/attr.c:546
 do_truncate+0x1a4/0x220 fs/open.c:68
 handle_truncate fs/namei.c:3596 [inline]
 do_open fs/namei.c:3979 [inline]
 path_openat+0x306c/0x3830 fs/namei.c:4134
 do_filp_open+0x1fa/0x410 fs/namei.c:4161
 do_sys_openat2+0x121/0x1c0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_open fs/open.c:1460 [inline]
 __se_sys_open fs/open.c:1456 [inline]
 __x64_sys_open+0x11e/0x150 fs/open.c:1456
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc7b378eec9
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:00007fc7b4613038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fc7b39e5fa0 RCX: 00007fc7b378eec9
RDX: 0000000000000100 RSI: 000000000014927e RDI: 0000200000000340
RBP: 00007fc7b3811f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc7b39e6038 R14: 00007fc7b39e5fa0 R15: 00007ffc872255b8
 </TASK>


Tested on:

commit:         b5a4da2c Add linux-next specific files for 20250924
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=10f02f12580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=841973c5ab4f4157
dashboard link: https://syzkaller.appspot.com/bug?extid=62edf7e27b2e8f754525
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=1581ed34580000