syzkaller login: [ 29.108011] BUG: Bad rss-counter state mm:00000000f394935a type:MM_FILEPAGES val:33 [ 29.109496] BUG: Bad rss-counter state mm:00000000f394935a type:MM_ANONPAGES val:22 [ 29.269256] ================================================================== [ 29.270194] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.271151] Read of size 8 at addr ffff888016cf2d08 by task sshd/220 [ 29.271947] [ 29.272171] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.273166] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.274175] Call Trace: [ 29.274510] [ 29.274816] dump_stack_lvl+0x91/0xf0 [ 29.275324] print_report+0xcc/0x620 [ 29.275825] ? __virt_addr_valid+0x102/0x340 [ 29.276395] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.277054] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.277679] kasan_report+0xbe/0xf0 [ 29.278158] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.278784] vma_interval_tree_remove+0xc75/0xec0 [ 29.279389] vma_prepare+0xc54/0x11a0 [ 29.279873] __split_vma+0x5af/0x950 [ 29.280349] ? __pfx___split_vma+0x10/0x10 [ 29.280899] ? find_held_lock+0x2c/0x110 [ 29.281425] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.281998] ? lock_is_held_type+0x9f/0x120 [ 29.282550] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.283172] ? mtree_range_walk+0x632/0x900 [ 29.283731] ? mas_walk+0x5c7/0x7c0 [ 29.284221] do_vmi_munmap+0x1f1/0x2b0 [ 29.284735] mmap_region+0x1f9/0x2660 [ 29.285221] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.285737] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.286481] ? __pfx_lock_acquire+0x10/0x10 [ 29.287028] ? __pfx_mmap_region+0x10/0x10 [ 29.287566] ? security_mmap_addr+0x7d/0xa0 [ 29.288107] ? get_unmapped_area+0x1f5/0x3f0 [ 29.288692] do_mmap+0x854/0xf00 [ 29.289140] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.289653] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.290230] ksys_mmap_pgoff+0x3af/0x500 [ 29.290754] do_syscall_64+0x3f/0x90 [ 29.291251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.291915] RIP: 0033:0x7f06b337ed82 [ 29.292383] 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 [ 29.294564] RSP: 002b:00007ffe85616ba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.295455] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06b337ed82 [ 29.296326] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06b27b8000 [ 29.297210] RBP: 00007f06b27b8000 R08: 0000000000000009 R09: 0000000000001000 [ 29.298066] R10: 0000000000000812 R11: 0000000000000206 R12: 00005562080bcec0 [ 29.298911] R13: 00007ffe85616bc0 R14: 00007ffe85616bf0 R15: 00007ffe85616f50 [ 29.299786] [ 29.300092] [ 29.300304] Allocated by task 213: [ 29.300760] kasan_save_stack+0x22/0x50 [ 29.301267] kasan_set_track+0x25/0x30 [ 29.301765] __kasan_slab_alloc+0x59/0x70 [ 29.302284] kmem_cache_alloc+0x16b/0x370 [ 29.302797] vm_area_dup+0x20/0x160 [ 29.303251] __split_vma+0x170/0x950 [ 29.303715] split_vma+0xc6/0x110 [ 29.304148] mprotect_fixup+0x8d2/0xb30 [ 29.304648] do_mprotect_pkey+0x87e/0xd40 [ 29.305170] __x64_sys_mprotect+0x78/0xc0 [ 29.305682] do_syscall_64+0x3f/0x90 [ 29.306156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.306788] [ 29.307006] Freed by task 203: [ 29.307391] kasan_save_stack+0x22/0x50 [ 29.307889] kasan_set_track+0x25/0x30 [ 29.308378] kasan_save_free_info+0x2b/0x50 [ 29.308931] __kasan_slab_free+0x10a/0x190 [ 29.309457] kmem_cache_free+0x10d/0x4d0 [ 29.309961] rcu_core+0x8c8/0x2860 [ 29.310396] __do_softirq+0x1b7/0x7d4 [ 29.310872] [ 29.311089] Last potentially related work creation: [ 29.311669] kasan_save_stack+0x22/0x50 [ 29.312162] __kasan_record_aux_stack+0x8e/0xa0 [ 29.312758] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.313402] remove_vma+0x139/0x170 [ 29.313858] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.314414] do_vmi_munmap+0x1f1/0x2b0 [ 29.314909] __vm_munmap+0x138/0x3a0 [ 29.315371] __x64_sys_munmap+0x59/0x80 [ 29.315864] do_syscall_64+0x3f/0x90 [ 29.316339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.317005] [ 29.317228] The buggy address belongs to the object at ffff888016cf2cb0 [ 29.317228] which belongs to the cache vm_area_struct of size 168 [ 29.318700] The buggy address is located 88 bytes inside of [ 29.318700] freed 168-byte region [ffff888016cf2cb0, ffff888016cf2d58) [ 29.320080] [ 29.320292] The buggy address belongs to the physical page: [ 29.320952] page:0000000065794511 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cf2 [ 29.322042] memcg:ffff88801982df01 [ 29.322467] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.323108] page_type: 0xffffffff() [ 29.323556] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.324466] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801982df01 [ 29.325372] page dumped because: kasan: bad access detected [ 29.326020] [ 29.326233] Memory state around the buggy address: [ 29.326809] ffff888016cf2c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 29.327652] ffff888016cf2c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.328516] >ffff888016cf2d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.329360] ^ [ 29.329792] ffff888016cf2d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.330643] ffff888016cf2e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.331499] ================================================================== [ 29.332496] Disabling lock debugging due to kernel taint [ 31.209533] BUG: Bad rss-counter state mm:000000003d5fa084 type:MM_FILEPAGES val:33 [ 31.211234] BUG: Bad rss-counter state mm:000000003d5fa084 type:MM_ANONPAGES val:22 [ 31.701417] BUG: Bad rss-counter state mm:000000002c3b059e type:MM_FILEPAGES val:33 [ 31.702448] BUG: Bad rss-counter state mm:000000002c3b059e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6004' (ECDSA) to the list of known hosts. 2023/06/21 01:51:37 fuzzer started 2023/06/21 01:51:37 dialing manager at localhost:36067 2023/06/21 01:51:37 checking machine... 2023/06/21 01:51:37 checking revisions... [ 32.444804] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:51:37 testing simple program... [ 32.494118] cgroup: Unknown subsys name 'net' [ 32.548951] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:51:37 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff85e08c8c RCX=ffffffff818acd17 RDX=0000000000000000 RSI=ffffffff86149134 RDI=ffffffff85e08c8c RBP=ffffffff85e08c8c RSP=ffff88806ce099e0 R8 =ffffffff86149134 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000238b2 R12=ffffffff85e08c90 R13=ffffffff85e08c8c R14=ffffffff85e08c8c R15=dffffc0000000000 RIP=ffffffff8112fc8c 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 00007fc27d013900 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=00007fc27c410c30 CR3=000000000cbb8000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=33439727a2cf074600000000000ae988 XMM05=3aca03fc8a5e47f400000000001333a8 XMM06=4fda316b135da52b0000000000132198 XMM07=fb795ef6d657705600000000001224f0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880160a8001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880160a7c01 RSI=ffff8880160a7c80 RDI=ffff88806cf09a88 RBP=ffff88806cf09ad0 RSP=ffff88806cf099f0 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=000000000008a84f R12=ffff88806cf09ad8 R13=ffff8880160a0000 R14=ffff8880160a7c80 R15=ffff88806cf09a78 RIP=ffffffff811304d1 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 00007f7f98c76700 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=00007ffc3fef2000 CR3=0000000009e4a000 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=00000000000000000000000000000000 XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732036333a3135 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343830 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000