syzkaller login: [ 31.192195] BUG: Bad rss-counter state mm:000000001046ee07 type:MM_FILEPAGES val:33 [ 31.193360] BUG: Bad rss-counter state mm:000000001046ee07 type:MM_ANONPAGES val:22 [ 31.357817] ================================================================== [ 31.358714] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.359644] Read of size 8 at addr ffff88800d746b38 by task sshd/221 [ 31.360485] [ 31.360744] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.361603] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.362564] Call Trace: [ 31.362885] [ 31.363170] dump_stack_lvl+0x91/0xf0 [ 31.363669] print_report+0xcc/0x620 [ 31.364156] ? __virt_addr_valid+0x102/0x340 [ 31.364714] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.365326] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.365960] kasan_report+0xbe/0xf0 [ 31.366442] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.367069] vma_interval_tree_remove+0xc75/0xec0 [ 31.367683] vma_prepare+0xc54/0x11a0 [ 31.368163] __split_vma+0x5af/0x950 [ 31.368636] ? __pfx___split_vma+0x10/0x10 [ 31.369187] ? find_held_lock+0x2c/0x110 [ 31.369717] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.370283] ? lock_is_held_type+0x9f/0x120 [ 31.370819] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.371421] ? mtree_range_walk+0x632/0x900 [ 31.371977] ? mas_walk+0x5c7/0x7c0 [ 31.372452] do_vmi_munmap+0x1f1/0x2b0 [ 31.372950] mmap_region+0x1f9/0x2660 [ 31.373433] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.373948] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.374661] ? __pfx_lock_acquire+0x10/0x10 [ 31.375192] ? __pfx_mmap_region+0x10/0x10 [ 31.375721] ? security_mmap_addr+0x7d/0xa0 [ 31.376249] ? get_unmapped_area+0x1f5/0x3f0 [ 31.376832] do_mmap+0x854/0xf00 [ 31.377269] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.377763] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.378329] ksys_mmap_pgoff+0x3af/0x500 [ 31.378832] do_syscall_64+0x3f/0x90 [ 31.379312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.379950] RIP: 0033:0x7fc0fa959d82 [ 31.380407] 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 [ 31.382524] RSP: 002b:00007ffeeed4d558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.383425] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc0fa959d82 [ 31.384275] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc0f9d93000 [ 31.385121] RBP: 00007fc0f9d93000 R08: 0000000000000009 R09: 0000000000001000 [ 31.385964] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f6ec177d90 [ 31.386810] R13: 00007ffeeed4d570 R14: 00007ffeeed4d5a0 R15: 00007ffeeed4d900 [ 31.387664] [ 31.387957] [ 31.388170] Allocated by task 214: [ 31.388595] kasan_save_stack+0x22/0x50 [ 31.389118] kasan_set_track+0x25/0x30 [ 31.389610] __kasan_slab_alloc+0x59/0x70 [ 31.390129] kmem_cache_alloc+0x16b/0x370 [ 31.390646] vm_area_dup+0x20/0x160 [ 31.391098] __split_vma+0x170/0x950 [ 31.391562] split_vma+0xc6/0x110 [ 31.392016] mprotect_fixup+0x8d2/0xb30 [ 31.392523] do_mprotect_pkey+0x87e/0xd40 [ 31.393065] __x64_sys_mprotect+0x78/0xc0 [ 31.393597] do_syscall_64+0x3f/0x90 [ 31.394072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.394716] [ 31.394935] Freed by task 13: [ 31.395320] kasan_save_stack+0x22/0x50 [ 31.395824] kasan_set_track+0x25/0x30 [ 31.396332] kasan_save_free_info+0x2b/0x50 [ 31.396883] __kasan_slab_free+0x10a/0x190 [ 31.397422] kmem_cache_free+0x10d/0x4d0 [ 31.397933] rcu_core+0x8c8/0x2860 [ 31.398383] __do_softirq+0x1b7/0x7d4 [ 31.398857] [ 31.399076] Last potentially related work creation: [ 31.399663] kasan_save_stack+0x22/0x50 [ 31.400182] __kasan_record_aux_stack+0x8e/0xa0 [ 31.400761] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.401402] remove_vma+0x139/0x170 [ 31.401858] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.402421] do_vmi_munmap+0x1f1/0x2b0 [ 31.402910] __vm_munmap+0x138/0x3a0 [ 31.403378] __x64_sys_munmap+0x59/0x80 [ 31.403876] do_syscall_64+0x3f/0x90 [ 31.404350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.404999] [ 31.405214] The buggy address belongs to the object at ffff88800d746ae0 [ 31.405214] which belongs to the cache vm_area_struct of size 168 [ 31.406698] The buggy address is located 88 bytes inside of [ 31.406698] freed 168-byte region [ffff88800d746ae0, ffff88800d746b88) [ 31.408105] [ 31.408323] The buggy address belongs to the physical page: [ 31.408997] page:000000007f87688d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd746 [ 31.410078] memcg:ffff8880164ebc01 [ 31.410510] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.411159] page_type: 0xffffffff() [ 31.411615] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.412531] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164ebc01 [ 31.413440] page dumped because: kasan: bad access detected [ 31.414105] [ 31.414322] Memory state around the buggy address: [ 31.414904] ffff88800d746a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.415755] ffff88800d746a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.416607] >ffff88800d746b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.417473] ^ [ 31.418087] ffff88800d746b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.418958] ffff88800d746c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.419809] ================================================================== [ 31.420867] Disabling lock debugging due to kernel taint [ 33.397367] BUG: Bad rss-counter state mm:0000000041a32420 type:MM_FILEPAGES val:33 [ 33.398549] BUG: Bad rss-counter state mm:0000000041a32420 type:MM_ANONPAGES val:22 [ 33.778892] BUG: Bad rss-counter state mm:00000000cc623e7b type:MM_FILEPAGES val:33 [ 33.779953] BUG: Bad rss-counter state mm:00000000cc623e7b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39913' (ECDSA) to the list of known hosts. 2023/06/20 03:48:56 fuzzer started 2023/06/20 03:48:56 dialing manager at localhost:44161 2023/06/20 03:48:56 checking machine... 2023/06/20 03:48:56 checking revisions... [ 34.478191] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:48:56 testing simple program... [ 34.534994] cgroup: Unknown subsys name 'net' [ 34.576061] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:48:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015c1f480 RCX=0000000000000001 RDX=1ffff11002b83eaa RSI=ffffffff83644344 RDI=ffff888015c1f48c RBP=ffff888015c1f550 RSP=ffff888015c1f398 R8 =0000000000000001 R9 =ffff888015c1f3f8 R10=0000000000038001 R11=000000000008ab54 R12=ffff888015c1f480 R13=0000000000000000 R14=ffff8880161cd1c0 R15=ffff888013104600 RIP=ffffffff813ad4f7 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 00007f0b46706900 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=00007ffd1442f000 CR3=000000000eab8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f14121e4060 CR3=000000001a0f4000 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=2035353a38343a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a38343a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000