syzkaller login: [ 30.153421] BUG: Bad rss-counter state mm:000000004699217a type:MM_FILEPAGES val:33 [ 30.154416] BUG: Bad rss-counter state mm:000000004699217a type:MM_ANONPAGES val:22 [ 30.323168] ================================================================== [ 30.324069] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.324998] Read of size 8 at addr ffff888017f74140 by task sshd/220 [ 30.325761] [ 30.325978] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.326978] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.327944] Call Trace: [ 30.328263] [ 30.328571] dump_stack_lvl+0x91/0xf0 [ 30.329058] print_report+0xcc/0x620 [ 30.329543] ? __virt_addr_valid+0x102/0x340 [ 30.330088] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.330705] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.331326] kasan_report+0xbe/0xf0 [ 30.331811] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.332425] vma_interval_tree_remove+0xc75/0xec0 [ 30.333025] vma_prepare+0xc54/0x11a0 [ 30.333501] __split_vma+0x5af/0x950 [ 30.333966] ? __pfx___split_vma+0x10/0x10 [ 30.334488] ? find_held_lock+0x2c/0x110 [ 30.335005] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.335567] ? lock_is_held_type+0x9f/0x120 [ 30.336104] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.336704] ? mtree_range_walk+0x632/0x900 [ 30.337256] ? mas_walk+0x5c7/0x7c0 [ 30.337730] do_vmi_munmap+0x1f1/0x2b0 [ 30.338217] mmap_region+0x1f9/0x2660 [ 30.338694] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.339232] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.339938] ? __pfx_lock_acquire+0x10/0x10 [ 30.340460] ? __pfx_mmap_region+0x10/0x10 [ 30.340986] ? security_mmap_addr+0x7d/0xa0 [ 30.341519] ? get_unmapped_area+0x1f5/0x3f0 [ 30.342062] do_mmap+0x854/0xf00 [ 30.342511] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.343010] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.343568] ksys_mmap_pgoff+0x3af/0x500 [ 30.344070] do_syscall_64+0x3f/0x90 [ 30.344541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.345198] RIP: 0033:0x7fbc72df4d82 [ 30.345649] 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 [ 30.347775] RSP: 002b:00007ffca55bf3c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.348680] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc72df4d82 [ 30.349515] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc7222e000 [ 30.350357] RBP: 00007fbc7222e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.351212] R10: 0000000000000812 R11: 0000000000000206 R12: 000056006d36cf70 [ 30.352040] R13: 00007ffca55bf3e0 R14: 00007ffca55bf410 R15: 00007ffca55bf770 [ 30.352889] [ 30.353176] [ 30.353392] Allocated by task 213: [ 30.353823] kasan_save_stack+0x22/0x50 [ 30.354318] kasan_set_track+0x25/0x30 [ 30.354808] __kasan_slab_alloc+0x59/0x70 [ 30.355349] kmem_cache_alloc+0x16b/0x370 [ 30.355865] vm_area_dup+0x20/0x160 [ 30.356312] __split_vma+0x170/0x950 [ 30.356778] split_vma+0xc6/0x110 [ 30.357218] mprotect_fixup+0x8d2/0xb30 [ 30.357716] do_mprotect_pkey+0x87e/0xd40 [ 30.358226] __x64_sys_mprotect+0x78/0xc0 [ 30.358738] do_syscall_64+0x3f/0x90 [ 30.359215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.359848] [ 30.360063] Freed by task 213: [ 30.360447] kasan_save_stack+0x22/0x50 [ 30.360948] kasan_set_track+0x25/0x30 [ 30.361433] kasan_save_free_info+0x2b/0x50 [ 30.361960] __kasan_slab_free+0x10a/0x190 [ 30.362489] kmem_cache_free+0x10d/0x4d0 [ 30.362999] rcu_core+0x8c8/0x2860 [ 30.363436] __do_softirq+0x1b7/0x7d4 [ 30.363910] [ 30.364133] Last potentially related work creation: [ 30.364707] kasan_save_stack+0x22/0x50 [ 30.365206] __kasan_record_aux_stack+0x8e/0xa0 [ 30.365771] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.366416] remove_vma+0x139/0x170 [ 30.366876] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.367427] do_vmi_munmap+0x1f1/0x2b0 [ 30.367905] __vm_munmap+0x138/0x3a0 [ 30.368368] __x64_sys_munmap+0x59/0x80 [ 30.368860] do_syscall_64+0x3f/0x90 [ 30.369329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.369966] [ 30.370182] The buggy address belongs to the object at ffff888017f740e8 [ 30.370182] which belongs to the cache vm_area_struct of size 168 [ 30.371631] The buggy address is located 88 bytes inside of [ 30.371631] freed 168-byte region [ffff888017f740e8, ffff888017f74190) [ 30.373021] [ 30.373233] The buggy address belongs to the physical page: [ 30.373879] page:0000000001091a7d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f74 [ 30.374974] memcg:ffff888014754201 [ 30.375396] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.376028] page_type: 0xffffffff() [ 30.376566] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.377561] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014754201 [ 30.378461] page dumped because: kasan: bad access detected [ 30.379140] [ 30.379357] Memory state around the buggy address: [ 30.379930] ffff888017f74000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.380781] ffff888017f74080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.381616] >ffff888017f74100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.382463] ^ [ 30.383106] ffff888017f74180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.383959] ffff888017f74200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.384799] ================================================================== [ 30.386124] Disabling lock debugging due to kernel taint [ 32.418015] BUG: Bad rss-counter state mm:000000008fbe00f3 type:MM_FILEPAGES val:33 [ 32.418784] BUG: Bad rss-counter state mm:000000008fbe00f3 type:MM_ANONPAGES val:22 [ 32.908899] BUG: Bad rss-counter state mm:00000000fc2cd69e type:MM_FILEPAGES val:33 [ 32.910091] BUG: Bad rss-counter state mm:00000000fc2cd69e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26676' (ECDSA) to the list of known hosts. 2023/06/21 05:21:17 fuzzer started 2023/06/21 05:21:18 dialing manager at localhost:36067 2023/06/21 05:21:18 checking machine... 2023/06/21 05:21:18 checking revisions... [ 33.527325] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:21:18 testing simple program... [ 33.582448] cgroup: Unknown subsys name 'net' [ 33.626117] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:21:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000040000040 RCX=ffffffff83636228 RDX=ffff8880145a8000 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff8880145a7e60 RSP=ffff8880145a7b48 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000053 R11=00000000000b6a61 R12=0000000000000053 R13=0000000000000000 R14=0000000040000040 R15=ffff8880145a7ea4 RIP=ffffffff814c0860 RFL=00000206 [-----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 00007f14283f2900 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=00007f78382dd650 CR3=000000000d8a4000 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=00000000000000000000000000000000 XMM01=ba5b24e0793b9e9b4942a16160ee517f XMM02=eff9b2d0a8fce9cb000000000011a978 XMM03=2c67c8bc2e329bc3000000000011aaa0 XMM04=1ce563e87debfcdc00000000000ae988 XMM05=d79dcabd3d214da00000000000132f88 XMM06=4fda316b135da52b0000000000131d78 XMM07=fb795ef6d65770560000000000121d48 XMM08=2c67c8bc2e329bc3000000000011aaa0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffff888018d27798 RDX=1ffff110031a4ee7 RSI=1ffff110031a4ee1 RDI=ffff888018d276f8 RBP=ffff888018d27750 RSP=ffff888018d27638 R8 =0000000000000000 R9 =0000000000000000 R10=ffff888018d276f8 R11=00000000000b6a61 R12=ffff888018d27758 R13=ffff888018d27740 R14=ffff888018d27739 R15=ffff888018d276f8 RIP=ffffffff811306da RFL=00000216 [----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 00007f7837d28900 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=00007ffe82fd3000 CR3=000000000964e000 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