syzkaller login: [ 33.895250] BUG: Bad rss-counter state mm:000000001266c58e type:MM_FILEPAGES val:33 [ 33.896485] BUG: Bad rss-counter state mm:000000001266c58e type:MM_ANONPAGES val:22 [ 33.939563] ================================================================== [ 33.940457] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.941410] Read of size 8 at addr ffff88800ee29b38 by task sshd/220 [ 33.942179] [ 33.942394] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.943259] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.944241] Call Trace: [ 33.944556] [ 33.944842] dump_stack_lvl+0x91/0xf0 [ 33.945335] print_report+0xcc/0x620 [ 33.945815] ? __virt_addr_valid+0x102/0x340 [ 33.946367] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.947006] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.947618] kasan_report+0xbe/0xf0 [ 33.948088] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.948725] vma_interval_tree_remove+0xc75/0xec0 [ 33.949328] vma_prepare+0xc54/0x11a0 [ 33.949806] __split_vma+0x5af/0x950 [ 33.950272] ? __pfx___split_vma+0x10/0x10 [ 33.950822] ? find_held_lock+0x2c/0x110 [ 33.951346] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.951912] ? lock_is_held_type+0x9f/0x120 [ 33.952450] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.953054] ? mtree_range_walk+0x632/0x900 [ 33.953603] ? mas_walk+0x5c7/0x7c0 [ 33.954075] do_vmi_munmap+0x1f1/0x2b0 [ 33.954577] mmap_region+0x1f9/0x2660 [ 33.955057] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.955565] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.956276] ? __pfx_lock_acquire+0x10/0x10 [ 33.956815] ? __pfx_mmap_region+0x10/0x10 [ 33.957344] ? security_mmap_addr+0x7d/0xa0 [ 33.957878] ? get_unmapped_area+0x1f5/0x3f0 [ 33.958430] do_mmap+0x854/0xf00 [ 33.958866] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.959358] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.959917] ksys_mmap_pgoff+0x3af/0x500 [ 33.960428] do_syscall_64+0x3f/0x90 [ 33.960903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.961548] RIP: 0033:0x7fed92402d82 [ 33.962002] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 33.964143] RSP: 002b:00007fff639fb378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.965045] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed92402d82 [ 33.965889] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed9183c000 [ 33.966749] RBP: 00007fed9183c000 R08: 0000000000000009 R09: 0000000000001000 [ 33.967598] R10: 0000000000000812 R11: 0000000000000206 R12: 000056439dd19d90 [ 33.968440] R13: 00007fff639fb390 R14: 00007fff639fb3c0 R15: 00007fff639fb720 [ 33.969289] [ 33.969584] [ 33.969798] Allocated by task 213: [ 33.970221] kasan_save_stack+0x22/0x50 [ 33.970743] kasan_set_track+0x25/0x30 [ 33.971233] __kasan_slab_alloc+0x59/0x70 [ 33.971759] kmem_cache_alloc+0x16b/0x370 [ 33.972273] vm_area_dup+0x20/0x160 [ 33.972732] __split_vma+0x170/0x950 [ 33.973197] split_vma+0xc6/0x110 [ 33.973634] mprotect_fixup+0x8d2/0xb30 [ 33.974136] do_mprotect_pkey+0x87e/0xd40 [ 33.974658] __x64_sys_mprotect+0x78/0xc0 [ 33.975182] do_syscall_64+0x3f/0x90 [ 33.975652] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.976294] [ 33.976507] Freed by task 213: [ 33.976896] kasan_save_stack+0x22/0x50 [ 33.977399] kasan_set_track+0x25/0x30 [ 33.977892] kasan_save_free_info+0x2b/0x50 [ 33.978437] __kasan_slab_free+0x10a/0x190 [ 33.978972] kmem_cache_free+0x10d/0x4d0 [ 33.979475] rcu_core+0x8c8/0x2860 [ 33.979915] __do_softirq+0x1b7/0x7d4 [ 33.980391] [ 33.980606] Last potentially related work creation: [ 33.981186] kasan_save_stack+0x22/0x50 [ 33.981697] __kasan_record_aux_stack+0x8e/0xa0 [ 33.982266] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.982915] remove_vma+0x139/0x170 [ 33.983364] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.983925] do_vmi_munmap+0x1f1/0x2b0 [ 33.984415] __vm_munmap+0x138/0x3a0 [ 33.984881] __x64_sys_munmap+0x59/0x80 [ 33.985388] do_syscall_64+0x3f/0x90 [ 33.985863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.986512] [ 33.986725] The buggy address belongs to the object at ffff88800ee29ae0 [ 33.986725] which belongs to the cache vm_area_struct of size 168 [ 33.988185] The buggy address is located 88 bytes inside of [ 33.988185] freed 168-byte region [ffff88800ee29ae0, ffff88800ee29b88) [ 33.989617] [ 33.989834] The buggy address belongs to the physical page: [ 33.990516] page:0000000020749b07 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee29 [ 33.991612] memcg:ffff88801a210e01 [ 33.992042] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.992695] page_type: 0xffffffff() [ 33.993144] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.994063] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a210e01 [ 33.994980] page dumped because: kasan: bad access detected [ 33.995636] [ 33.995850] Memory state around the buggy address: [ 33.996424] ffff88800ee29a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.997275] ffff88800ee29a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 33.998130] >ffff88800ee29b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.998989] ^ [ 33.999596] ffff88800ee29b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.000461] ffff88800ee29c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.001314] ================================================================== [ 34.002624] Disabling lock debugging due to kernel taint [ 36.918212] BUG: Bad rss-counter state mm:000000008089609b type:MM_FILEPAGES val:33 [ 36.919300] BUG: Bad rss-counter state mm:000000008089609b type:MM_ANONPAGES val:22 [ 37.425698] BUG: Bad rss-counter state mm:00000000036b0f1f type:MM_FILEPAGES val:33 [ 37.427013] BUG: Bad rss-counter state mm:00000000036b0f1f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53762' (ECDSA) to the list of known hosts. 2023/06/20 01:52:39 fuzzer started 2023/06/20 01:52:40 dialing manager at localhost:44161 2023/06/20 01:52:40 checking machine... 2023/06/20 01:52:40 checking revisions... [ 38.169397] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:52:40 testing simple program... [ 38.220302] cgroup: Unknown subsys name 'net' [ 38.259808] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:52:36 Registers: info registers vcpu 0 RAX=0000000000000008 RBX=ffff88800ff1c000 RCX=0000000000000001 RDX=000000000000171f RSI=ffff88800ff1c000 RDI=ffff888019bbbe20 RBP=ffff888019bbbe20 RSP=ffff8880167d7a58 R8 =0000000000000002 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=0000000000000001 R15=000000000000171f RIP=ffffffff814c07e4 RFL=00000286 [--S--P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4c73fff700 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f6ee2fa59d0 CR3=000000000d042000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2039333a32353a3130203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a363431373320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a32353a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800a3af9c0 RCX=ffffffff8613751a RDX=1ffff11001475f38 RSI=ffff88800a3afd08 RDI=ffff88800a3af9c0 RBP=ffff88800a3afd08 RSP=ffff88800a3af918 R8 =ffffffff8613751e R9 =ffff88800a3afa00 R10=0000000000038001 R11=0000000000020d8a R12=0000000000000008 R13=ffff88800a3afa08 R14=ffff88800a3afd10 R15=ffff88800a3af9c0 RIP=ffffffff81130416 RFL=00000296 [--S-AP-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe143beb900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffcffe5f000 CR3=00000000147c6000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000