syzkaller login: [ 38.730604] BUG: Bad rss-counter state mm:000000003c28bdd8 type:MM_FILEPAGES val:33 [ 38.731607] BUG: Bad rss-counter state mm:000000003c28bdd8 type:MM_ANONPAGES val:22 [ 38.891439] ================================================================== [ 38.892367] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.893315] Read of size 8 at addr ffff8880094b53f8 by task sshd/219 [ 38.894097] [ 38.894313] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.895291] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.896294] Call Trace: [ 38.896632] [ 38.896927] dump_stack_lvl+0x91/0xf0 [ 38.897425] print_report+0xcc/0x620 [ 38.897920] ? __virt_addr_valid+0x102/0x340 [ 38.898480] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.899101] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.899725] kasan_report+0xbe/0xf0 [ 38.900207] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.900829] vma_interval_tree_remove+0xc75/0xec0 [ 38.901445] vma_prepare+0xc54/0x11a0 [ 38.901928] __split_vma+0x5af/0x950 [ 38.902401] ? __pfx___split_vma+0x10/0x10 [ 38.902935] ? find_held_lock+0x2c/0x110 [ 38.903461] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.904036] ? lock_is_held_type+0x9f/0x120 [ 38.904598] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.905221] ? mtree_range_walk+0x632/0x900 [ 38.905773] ? mas_walk+0x5c7/0x7c0 [ 38.906253] do_vmi_munmap+0x1f1/0x2b0 [ 38.906757] mmap_region+0x1f9/0x2660 [ 38.907248] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.907768] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.908499] ? __pfx_lock_acquire+0x10/0x10 [ 38.909038] ? __pfx_mmap_region+0x10/0x10 [ 38.909578] ? security_mmap_addr+0x7d/0xa0 [ 38.910114] ? get_unmapped_area+0x1f5/0x3f0 [ 38.910671] do_mmap+0x854/0xf00 [ 38.911107] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.911613] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.912192] ksys_mmap_pgoff+0x3af/0x500 [ 38.912709] do_syscall_64+0x3f/0x90 [ 38.913191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913853] RIP: 0033:0x7f6938a65d82 [ 38.914317] 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 [ 38.916460] RSP: 002b:00007ffc4deb1448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.917377] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6938a65d82 [ 38.918249] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6937e9f000 [ 38.919101] RBP: 00007f6937e9f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.919954] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555eb61a8b20 [ 38.920818] R13: 00007ffc4deb1460 R14: 00007ffc4deb1490 R15: 00007ffc4deb17f0 [ 38.921688] [ 38.921985] [ 38.922207] Allocated by task 212: [ 38.922681] kasan_save_stack+0x22/0x50 [ 38.923185] kasan_set_track+0x25/0x30 [ 38.923681] __kasan_slab_alloc+0x59/0x70 [ 38.924221] kmem_cache_alloc+0x16b/0x370 [ 38.924735] vm_area_dup+0x20/0x160 [ 38.925191] __split_vma+0x170/0x950 [ 38.925667] split_vma+0xc6/0x110 [ 38.926110] mprotect_fixup+0x8d2/0xb30 [ 38.926633] do_mprotect_pkey+0x87e/0xd40 [ 38.927163] __x64_sys_mprotect+0x78/0xc0 [ 38.927697] do_syscall_64+0x3f/0x90 [ 38.928186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.928844] [ 38.929066] Freed by task 212: [ 38.929463] kasan_save_stack+0x22/0x50 [ 38.929967] kasan_set_track+0x25/0x30 [ 38.930469] kasan_save_free_info+0x2b/0x50 [ 38.931014] __kasan_slab_free+0x10a/0x190 [ 38.931551] kmem_cache_free+0x10d/0x4d0 [ 38.932062] rcu_core+0x8c8/0x2860 [ 38.932545] __do_softirq+0x1b7/0x7d4 [ 38.933028] [ 38.933250] Last potentially related work creation: [ 38.933843] kasan_save_stack+0x22/0x50 [ 38.934356] __kasan_record_aux_stack+0x8e/0xa0 [ 38.934940] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.935645] remove_vma+0x139/0x170 [ 38.936126] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.936716] do_vmi_munmap+0x1f1/0x2b0 [ 38.937229] __vm_munmap+0x138/0x3a0 [ 38.937730] __x64_sys_munmap+0x59/0x80 [ 38.938254] do_syscall_64+0x3f/0x90 [ 38.938756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.939437] [ 38.939663] The buggy address belongs to the object at ffff8880094b53a0 [ 38.939663] which belongs to the cache vm_area_struct of size 168 [ 38.941238] The buggy address is located 88 bytes inside of [ 38.941238] freed 168-byte region [ffff8880094b53a0, ffff8880094b5448) [ 38.942720] [ 38.942945] The buggy address belongs to the physical page: [ 38.943649] page:00000000db3b58e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880094b52b8 pfn:0x94b5 [ 38.944972] memcg:ffff88800ef49d01 [ 38.945433] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.946114] page_type: 0xffffffff() [ 38.946585] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c7580 dead000000000008 [ 38.947554] raw: ffff8880094b52b8 0000000080110010 00000001ffffffff ffff88800ef49d01 [ 38.948522] page dumped because: kasan: bad access detected [ 38.949223] [ 38.949450] Memory state around the buggy address: [ 38.950065] ffff8880094b5280: fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb fb [ 38.950965] ffff8880094b5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.951871] >ffff8880094b5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.952796] ^ [ 38.953688] ffff8880094b5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.954601] ffff8880094b5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.955496] ================================================================== [ 38.956528] Disabling lock debugging due to kernel taint [ 40.741959] BUG: Bad rss-counter state mm:00000000d522dcbb type:MM_FILEPAGES val:33 [ 40.743240] BUG: Bad rss-counter state mm:00000000d522dcbb type:MM_ANONPAGES val:22 [ 41.178696] BUG: Bad rss-counter state mm:0000000013996a2d type:MM_FILEPAGES val:33 [ 41.179433] BUG: Bad rss-counter state mm:0000000013996a2d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35090' (ECDSA) to the list of known hosts. 2023/06/21 06:27:14 fuzzer started 2023/06/21 06:27:14 dialing manager at localhost:36067 2023/06/21 06:27:14 checking machine... 2023/06/21 06:27:14 checking revisions... [ 41.817544] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:27:14 testing simple program... [ 41.870321] cgroup: Unknown subsys name 'net' [ 41.925953] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:27:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=ffffffff8542a6c0 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9c132e RSP=ffff88806ce09958 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=ffff88801a6cb080 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] 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 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=00007fae080a1af0 CR3=0000000016a50000 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=2034313a37323a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a37323a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002fc4f4b RSI=ffffffff8185af33 RDI=ffff888017e278d8 RBP=ffff888017e27970 RSP=ffff888017e278d8 R8 =0000000000000001 R9 =ffff888017e27918 R10=0000000000038001 R11=00000000000223eb R12=ffff888017e279a0 R13=0000000000000000 R14=ffff888019839b40 R15=0000000000092cc0 RIP=ffffffff810bd052 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 00007fb1226ee900 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=00007ffd947a1000 CR3=0000000017f58000 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