===================================== WARNING: bad unlock balance detected! 6.9.0-rc2-next-20240403-syzkaller #0 Not tainted ------------------------------------- syz-executor.0/9053 is trying to release lock (ptlock_ptr(ptdesc)) at: [] spin_unlock include/linux/spinlock.h:391 [inline] [] madvise_cold_or_pageout_pte_range+0x170f/0x3990 mm/madvise.c:480 but there are no more locks to release! other info that might help us debug this: 1 lock held by syz-executor.0/9053: #0: ffff888052c17398 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:144 [inline] #0: ffff888052c17398 (&mm->mmap_lock){++++}-{3:3}, at: do_madvise+0x481/0x44a0 mm/madvise.c:1429 stack backtrace: CPU: 0 PID: 9053 Comm: syz-executor.0 Not tainted 6.9.0-rc2-next-20240403-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_unlock_imbalance_bug+0x256/0x2c0 kernel/locking/lockdep.c:5194 __lock_release kernel/locking/lockdep.c:5431 [inline] lock_release+0x599/0x9f0 kernel/locking/lockdep.c:5774 __raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline] _raw_spin_unlock+0x16/0x50 kernel/locking/spinlock.c:186 spin_unlock include/linux/spinlock.h:391 [inline] madvise_cold_or_pageout_pte_range+0x170f/0x3990 mm/madvise.c:480 walk_pmd_range mm/pagewalk.c:143 [inline] walk_pud_range mm/pagewalk.c:221 [inline] walk_p4d_range mm/pagewalk.c:256 [inline] walk_pgd_range+0xba1/0x1810 mm/pagewalk.c:293 __walk_page_range+0x132/0x720 mm/pagewalk.c:395 walk_page_range+0x58f/0x7c0 mm/pagewalk.c:521 madvise_pageout_page_range mm/madvise.c:600 [inline] madvise_pageout mm/madvise.c:627 [inline] madvise_vma_behavior mm/madvise.c:1030 [inline] madvise_walk_vmas mm/madvise.c:1256 [inline] do_madvise+0x317e/0x44a0 mm/madvise.c:1442 __do_sys_madvise mm/madvise.c:1457 [inline] __se_sys_madvise mm/madvise.c:1455 [inline] __x64_sys_madvise+0xa6/0xc0 mm/madvise.c:1455 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x72/0x7a RIP: 0033:0x7fdd72a7dde9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fdd737d20c8 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007fdd72babf80 RCX: 00007fdd72a7dde9 RDX: 0000000000000015 RSI: 0000000000600000 RDI: 0000000020000000 RBP: 00007fdd72aca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fdd72babf80 R15: 00007ffe2ad9cb38 ------------[ cut here ]------------ pvqspinlock: lock 0xffff888052bfe240 has corrupted value 0x0! WARNING: CPU: 1 PID: 9053 at kernel/locking/qspinlock_paravirt.h:510 __pv_queued_spin_unlock_slowpath+0x241/0x2f0 kernel/locking/qspinlock_paravirt.h:508 Modules linked in: CPU: 1 PID: 9053 Comm: syz-executor.0 Not tainted 6.9.0-rc2-next-20240403-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:__pv_queued_spin_unlock_slowpath+0x241/0x2f0 kernel/locking/qspinlock_paravirt.h:508 Code: 85 0a 6e f6 4c 89 f0 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 9f 00 00 00 41 8b 16 48 c7 c7 c0 26 cb 8b 4c 89 f6 e8 40 b3 cb f5 90 <0f> 0b 90 90 eb 8d 44 89 f1 80 e1 07 38 c1 0f 8c 26 ff ff ff 4c 89 RSP: 0018:ffffc90011d3f238 EFLAGS: 00010246 RAX: f369686a57051700 RBX: dffffc0000000000 RCX: 0000000000040000 RDX: ffffc900045e1000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: dffffc0000000000 R08: ffffffff81580152 R09: 1ffff920023a7de8 R10: dffffc0000000000 R11: fffff520023a7de9 R12: 1ffff1100a57fc4a R13: ffff888052bfe250 R14: ffff888052bfe240 R15: ffff888052bfe240 FS: 00007fdd737d26c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2b0f637003 CR3: 00000000793ae000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_callee_save___pv_queued_spin_unlock_slowpath+0x15/0x30 .slowpath+0x9/0x16 pv_queued_spin_unlock arch/x86/include/asm/paravirt.h:589 [inline] queued_spin_unlock arch/x86/include/asm/qspinlock.h:57 [inline] do_raw_spin_unlock+0x13c/0x8b0 kernel/locking/spinlock_debug.c:142 __raw_spin_unlock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_unlock+0x1e/0x50 kernel/locking/spinlock.c:186 spin_unlock include/linux/spinlock.h:391 [inline] madvise_cold_or_pageout_pte_range+0x170f/0x3990 mm/madvise.c:480 walk_pmd_range mm/pagewalk.c:143 [inline] walk_pud_range mm/pagewalk.c:221 [inline] walk_p4d_range mm/pagewalk.c:256 [inline] walk_pgd_range+0xba1/0x1810 mm/pagewalk.c:293 __walk_page_range+0x132/0x720 mm/pagewalk.c:395 walk_page_range+0x58f/0x7c0 mm/pagewalk.c:521 madvise_pageout_page_range mm/madvise.c:600 [inline] madvise_pageout mm/madvise.c:627 [inline] madvise_vma_behavior mm/madvise.c:1030 [inline] madvise_walk_vmas mm/madvise.c:1256 [inline] do_madvise+0x317e/0x44a0 mm/madvise.c:1442 __do_sys_madvise mm/madvise.c:1457 [inline] __se_sys_madvise mm/madvise.c:1455 [inline] __x64_sys_madvise+0xa6/0xc0 mm/madvise.c:1455 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x72/0x7a RIP: 0033:0x7fdd72a7dde9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fdd737d20c8 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007fdd72babf80 RCX: 00007fdd72a7dde9 RDX: 0000000000000015 RSI: 0000000000600000 RDI: 0000000020000000 RBP: 00007fdd72aca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fdd72babf80 R15: 00007ffe2ad9cb38