syzkaller login: [ 31.249998] BUG: Bad rss-counter state mm:0000000090e1ff18 type:MM_FILEPAGES val:33 [ 31.251213] BUG: Bad rss-counter state mm:0000000090e1ff18 type:MM_ANONPAGES val:22 [ 31.292602] ================================================================== [ 31.293597] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.294476] Read of size 8 at addr ffff8880090a7ed8 by task sshd/219 [ 31.295195] [ 31.295402] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.296217] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.297133] Call Trace: [ 31.297431] [ 31.297697] dump_stack_lvl+0x91/0xf0 [ 31.298157] print_report+0xcc/0x620 [ 31.298617] ? __virt_addr_valid+0x102/0x340 [ 31.299135] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.299727] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.300305] kasan_report+0xbe/0xf0 [ 31.300766] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.301378] vma_interval_tree_remove+0xc75/0xec0 [ 31.301970] vma_prepare+0xc54/0x11a0 [ 31.302439] __split_vma+0x5af/0x950 [ 31.302894] ? __pfx___split_vma+0x10/0x10 [ 31.303411] ? find_held_lock+0x2c/0x110 [ 31.303932] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.304502] ? lock_is_held_type+0x9f/0x120 [ 31.305045] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.305648] ? mtree_range_walk+0x632/0x900 [ 31.306201] ? mas_walk+0x5c7/0x7c0 [ 31.306665] do_vmi_munmap+0x1f1/0x2b0 [ 31.307150] mmap_region+0x1f9/0x2660 [ 31.307636] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.308138] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.308851] ? __pfx_lock_acquire+0x10/0x10 [ 31.309388] ? __pfx_mmap_region+0x10/0x10 [ 31.309913] ? security_mmap_addr+0x7d/0xa0 [ 31.310437] ? get_unmapped_area+0x1f5/0x3f0 [ 31.310973] do_mmap+0x854/0xf00 [ 31.311398] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.311885] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.312448] ksys_mmap_pgoff+0x3af/0x500 [ 31.312956] do_syscall_64+0x3f/0x90 [ 31.313429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.314067] RIP: 0033:0x7fe6e8081d82 [ 31.314517] 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 [ 31.316817] RSP: 002b:00007ffc945f0f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.317717] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe6e8081d82 [ 31.318553] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe6e74bb000 [ 31.319407] RBP: 00007fe6e74bb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.320243] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b2b7f6f70 [ 31.321110] R13: 00007ffc945f0fb0 R14: 00007ffc945f0fe0 R15: 00007ffc945f1340 [ 31.321963] [ 31.322245] [ 31.322459] Allocated by task 212: [ 31.322891] kasan_save_stack+0x22/0x50 [ 31.323385] kasan_set_track+0x25/0x30 [ 31.323872] __kasan_slab_alloc+0x59/0x70 [ 31.324398] kmem_cache_alloc+0x16b/0x370 [ 31.324906] vm_area_dup+0x20/0x160 [ 31.325348] __split_vma+0x170/0x950 [ 31.325804] split_vma+0xc6/0x110 [ 31.326241] mprotect_fixup+0x8d2/0xb30 [ 31.326731] do_mprotect_pkey+0x87e/0xd40 [ 31.327253] __x64_sys_mprotect+0x78/0xc0 [ 31.327773] do_syscall_64+0x3f/0x90 [ 31.328254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.328895] [ 31.329107] Freed by task 212: [ 31.329492] kasan_save_stack+0x22/0x50 [ 31.329994] kasan_set_track+0x25/0x30 [ 31.330477] kasan_save_free_info+0x2b/0x50 [ 31.331007] __kasan_slab_free+0x10a/0x190 [ 31.331542] kmem_cache_free+0x10d/0x4d0 [ 31.332035] rcu_core+0x8c8/0x2860 [ 31.332498] __do_softirq+0x1b7/0x7d4 [ 31.332966] [ 31.333175] Last potentially related work creation: [ 31.333750] kasan_save_stack+0x22/0x50 [ 31.334242] __kasan_record_aux_stack+0x8e/0xa0 [ 31.334799] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.335443] remove_vma+0x139/0x170 [ 31.335888] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.336453] do_vmi_munmap+0x1f1/0x2b0 [ 31.336940] __vm_munmap+0x138/0x3a0 [ 31.337398] __x64_sys_munmap+0x59/0x80 [ 31.337882] do_syscall_64+0x3f/0x90 [ 31.338343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.338974] [ 31.339179] The buggy address belongs to the object at ffff8880090a7e80 [ 31.339179] which belongs to the cache vm_area_struct of size 168 [ 31.340628] The buggy address is located 88 bytes inside of [ 31.340628] freed 168-byte region [ffff8880090a7e80, ffff8880090a7f28) [ 31.342023] [ 31.342232] The buggy address belongs to the physical page: [ 31.342877] page:000000004b509c4b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x90a7 [ 31.343957] memcg:ffff888019dad601 [ 31.344389] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.345039] page_type: 0xffffffff() [ 31.345487] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.346381] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019dad601 [ 31.347278] page dumped because: kasan: bad access detected [ 31.347935] [ 31.348149] Memory state around the buggy address: [ 31.348736] ffff8880090a7d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.349585] ffff8880090a7e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.350423] >ffff8880090a7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.351265] ^ [ 31.351993] ffff8880090a7f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.352842] ffff8880090a7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.353677] ================================================================== [ 31.354772] Disabling lock debugging due to kernel taint [ 34.002160] BUG: Bad rss-counter state mm:00000000d336f169 type:MM_FILEPAGES val:33 [ 34.003345] BUG: Bad rss-counter state mm:00000000d336f169 type:MM_ANONPAGES val:22 [ 34.384795] BUG: Bad rss-counter state mm:00000000b20a5551 type:MM_FILEPAGES val:33 [ 34.386464] BUG: Bad rss-counter state mm:00000000b20a5551 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35066' (ECDSA) to the list of known hosts. 2023/06/20 13:40:03 fuzzer started 2023/06/20 13:40:04 dialing manager at localhost:36067 2023/06/20 13:40:04 checking machine... 2023/06/20 13:40:04 checking revisions... [ 35.050495] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:40:04 testing simple program... [ 35.096586] cgroup: Unknown subsys name 'net' [ 35.130099] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:40:03 Registers: info registers vcpu 0 RAX=00007f1838c43010 RBX=00007fffd8c5f4d0 RCX=000000000000acf8 RDX=0000000000000000 RSI=00007fffd8c5f4d0 RDI=00007f1838cf1ea8 RBP=00005588eaceb5e0 RSP=00007fffd8c5ef90 R8 =0000000000133e68 R9 =0000000000133e68 R10=0000000000000002 R11=000000000000ea86 R12=000000000000002b R13=0000000000083a20 R14=0000000000000000 R15=00007fffd8c5efb0 RIP=00007f183a357ace RFL=00010246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f18397d3900 00000000 00000000 GS =0000 0000000000000000 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=00007f1838c43010 CR3=000000000970c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=04b4e7ae7c44294500000000000ae988 XMM05=f7cb237cdba14d610000000000133b20 XMM06=0ae1bc7ccf025d4100000000001328c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880087a63a0 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e37e01 RSI=ffff888008e37e98 RDI=ffff888008e37e98 RBP=ffff888008e379d0 RSP=ffff888008e37908 R8 =0000000000000001 R9 =ffff888008e379b8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff888008e379d8 R13=ffff888008e379c0 R14=ffff888008e37e98 R15=ffff888008e37978 RIP=ffffffff81131236 RFL=00000202 [-------] 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 0000000000000000 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=00007ffd81e90000 CR3=000000000c6b6000 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