syzkaller login: [ 30.742471] BUG: Bad rss-counter state mm:000000001dbd0346 type:MM_FILEPAGES val:33 [ 30.743258] BUG: Bad rss-counter state mm:000000001dbd0346 type:MM_ANONPAGES val:22 [ 30.908185] ================================================================== [ 30.909432] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.910683] Read of size 8 at addr ffff88801a2ad4e0 by task sshd/219 [ 30.911550] [ 30.911800] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.912782] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.913886] Call Trace: [ 30.914264] [ 30.914590] dump_stack_lvl+0x91/0xf0 [ 30.915154] print_report+0xcc/0x620 [ 30.915724] ? __virt_addr_valid+0x102/0x340 [ 30.916373] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.917125] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.917838] kasan_report+0xbe/0xf0 [ 30.918426] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.919169] vma_interval_tree_remove+0xc75/0xec0 [ 30.919861] vma_prepare+0xc54/0x11a0 [ 30.920416] __split_vma+0x5af/0x950 [ 30.920957] ? __pfx___split_vma+0x10/0x10 [ 30.921564] ? find_held_lock+0x2c/0x110 [ 30.922171] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.922884] ? lock_is_held_type+0x9f/0x120 [ 30.923694] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.924525] ? mtree_range_walk+0x632/0x900 [ 30.925194] ? mas_walk+0x5c7/0x7c0 [ 30.925748] do_vmi_munmap+0x1f1/0x2b0 [ 30.926337] mmap_region+0x1f9/0x2660 [ 30.926910] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.927521] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.928371] ? __pfx_lock_acquire+0x10/0x10 [ 30.929019] ? __pfx_mmap_region+0x10/0x10 [ 30.929625] ? security_mmap_addr+0x7d/0xa0 [ 30.930239] ? get_unmapped_area+0x1f5/0x3f0 [ 30.930895] do_mmap+0x854/0xf00 [ 30.931417] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.932005] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.932672] ksys_mmap_pgoff+0x3af/0x500 [ 30.933260] do_syscall_64+0x3f/0x90 [ 30.933818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.934657] RIP: 0033:0x7f9d2ae3bd82 [ 30.935196] 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 [ 30.937694] RSP: 002b:00007ffd90c68b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.938762] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d2ae3bd82 [ 30.939761] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d2a275000 [ 30.940756] RBP: 00007f9d2a275000 R08: 0000000000000009 R09: 0000000000001000 [ 30.941750] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d2f740d90 [ 30.942767] R13: 00007ffd90c68b30 R14: 00007ffd90c68b60 R15: 00007ffd90c68ec0 [ 30.943792] [ 30.944133] [ 30.944391] Allocated by task 212: [ 30.944879] kasan_save_stack+0x22/0x50 [ 30.945470] kasan_set_track+0x25/0x30 [ 30.946037] __kasan_slab_alloc+0x59/0x70 [ 30.946672] kmem_cache_alloc+0x16b/0x370 [ 30.947261] vm_area_dup+0x20/0x160 [ 30.947792] __split_vma+0x170/0x950 [ 30.948349] split_vma+0xc6/0x110 [ 30.948864] mprotect_fixup+0x8d2/0xb30 [ 30.949442] do_mprotect_pkey+0x87e/0xd40 [ 30.950042] __x64_sys_mprotect+0x78/0xc0 [ 30.950643] do_syscall_64+0x3f/0x90 [ 30.951180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.951901] [ 30.952159] Freed by task 212: [ 30.952630] kasan_save_stack+0x22/0x50 [ 30.953224] kasan_set_track+0x25/0x30 [ 30.953801] kasan_save_free_info+0x2b/0x50 [ 30.954437] __kasan_slab_free+0x10a/0x190 [ 30.955056] kmem_cache_free+0x10d/0x4d0 [ 30.955652] rcu_core+0x8c8/0x2860 [ 30.956179] __do_softirq+0x1b7/0x7d4 [ 30.956743] [ 30.956996] Last potentially related work creation: [ 30.957678] kasan_save_stack+0x22/0x50 [ 30.958307] __kasan_record_aux_stack+0x8e/0xa0 [ 30.958950] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.959701] remove_vma+0x139/0x170 [ 30.960234] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.960866] do_vmi_munmap+0x1f1/0x2b0 [ 30.961425] __vm_munmap+0x138/0x3a0 [ 30.961948] __x64_sys_munmap+0x59/0x80 [ 30.962531] do_syscall_64+0x3f/0x90 [ 30.963093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.963832] [ 30.964080] The buggy address belongs to the object at ffff88801a2ad488 [ 30.964080] which belongs to the cache vm_area_struct of size 168 [ 30.965791] The buggy address is located 88 bytes inside of [ 30.965791] freed 168-byte region [ffff88801a2ad488, ffff88801a2ad530) [ 30.967469] [ 30.967723] The buggy address belongs to the physical page: [ 30.968492] page:00000000f0bc060d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2ad [ 30.969741] memcg:ffff888016d89201 [ 30.970259] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.971015] page_type: 0xffffffff() [ 30.971522] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.972589] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d89201 [ 30.973669] page dumped because: kasan: bad access detected [ 30.974484] [ 30.974740] Memory state around the buggy address: [ 30.975436] ffff88801a2ad380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.976423] ffff88801a2ad400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.977413] >ffff88801a2ad480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.978404] ^ [ 30.979270] ffff88801a2ad500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.980258] ffff88801a2ad580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.981244] ================================================================== [ 30.982483] Disabling lock debugging due to kernel taint [ 32.862122] BUG: Bad rss-counter state mm:00000000346ade82 type:MM_FILEPAGES val:33 [ 32.863398] BUG: Bad rss-counter state mm:00000000346ade82 type:MM_ANONPAGES val:22 [ 33.426665] BUG: Bad rss-counter state mm:000000006b2eadab type:MM_FILEPAGES val:33 [ 33.427834] BUG: Bad rss-counter state mm:000000006b2eadab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21644' (ECDSA) to the list of known hosts. 2023/06/21 08:48:34 fuzzer started 2023/06/21 08:48:34 dialing manager at localhost:36067 2023/06/21 08:48:34 checking machine... 2023/06/21 08:48:34 checking revisions... [ 34.024007] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:48:34 testing simple program... [ 34.057866] cgroup: Unknown subsys name 'net' [ 34.095389] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:48:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007ff0a4337000 RCX=ffffffff81007b82 RDX=ffff88800ef81b40 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff88800c5377d0 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007ff0a4337000 R11=00000000000b6a61 R12=ffff88800c537918 R13=0000000000000000 R14=ffff88800ef81b40 R15=ffff888010159ab0 RIP=ffffffff814c027c RFL=00000246 [---Z-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 00007ff0a3e44900 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=00007ffcaed5c000 CR3=000000000dcd2000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff1100d9e1391 RCX=ffffffff812d8f13 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806cf09c70 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806cf09ff8 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000056 [---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 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=00007fc0a7e24290 CR3=000000000b890000 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=2034333a38343a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a38343a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000