syzkaller login: [ 38.823780] BUG: Bad rss-counter state mm:000000007f9c5ab4 type:MM_FILEPAGES val:33 [ 38.825020] BUG: Bad rss-counter state mm:000000007f9c5ab4 type:MM_ANONPAGES val:22 [ 38.976344] ================================================================== [ 38.977455] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.978569] Read of size 8 at addr ffff88800eec45c8 by task sshd/218 [ 38.979627] [ 38.979893] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.980932] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.981971] Call Trace: [ 38.982300] [ 38.982589] dump_stack_lvl+0x91/0xf0 [ 38.983085] print_report+0xcc/0x620 [ 38.983585] ? __virt_addr_valid+0x102/0x340 [ 38.984141] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.984777] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.985398] kasan_report+0xbe/0xf0 [ 38.985869] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.986498] vma_interval_tree_remove+0xc75/0xec0 [ 38.987157] vma_prepare+0xc54/0x11a0 [ 38.987642] __split_vma+0x5af/0x950 [ 38.988115] ? __pfx___split_vma+0x10/0x10 [ 38.988661] ? find_held_lock+0x2c/0x110 [ 38.989183] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.989759] ? lock_is_held_type+0x9f/0x120 [ 38.990304] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.990911] ? mtree_range_walk+0x632/0x900 [ 38.991469] ? mas_walk+0x5c7/0x7c0 [ 38.991947] do_vmi_munmap+0x1f1/0x2b0 [ 38.992461] mmap_region+0x1f9/0x2660 [ 38.992946] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.993468] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.994182] ? __pfx_lock_acquire+0x10/0x10 [ 38.994715] ? __pfx_mmap_region+0x10/0x10 [ 38.995247] ? security_mmap_addr+0x7d/0xa0 [ 38.995780] ? get_unmapped_area+0x1f5/0x3f0 [ 38.996330] do_mmap+0x854/0xf00 [ 38.996778] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.997276] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.997842] ksys_mmap_pgoff+0x3af/0x500 [ 38.998351] do_syscall_64+0x3f/0x90 [ 38.998832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.999476] RIP: 0033:0x7f87b8c44d82 [ 38.999933] 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 [ 39.002078] RSP: 002b:00007ffe42b79ba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.002975] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f87b8c44d82 [ 39.003829] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f87b807e000 [ 39.004687] RBP: 00007f87b807e000 R08: 0000000000000009 R09: 0000000000001000 [ 39.005537] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad562ddf70 [ 39.006377] R13: 00007ffe42b79bc0 R14: 00007ffe42b79bf0 R15: 00007ffe42b79f50 [ 39.007235] [ 39.007525] [ 39.007741] Allocated by task 211: [ 39.008164] kasan_save_stack+0x22/0x50 [ 39.008694] kasan_set_track+0x25/0x30 [ 39.009189] __kasan_slab_alloc+0x59/0x70 [ 39.009724] kmem_cache_alloc+0x16b/0x370 [ 39.010240] vm_area_dup+0x20/0x160 [ 39.010700] __split_vma+0x170/0x950 [ 39.011167] split_vma+0xc6/0x110 [ 39.011612] mprotect_fixup+0x8d2/0xb30 [ 39.012111] do_mprotect_pkey+0x87e/0xd40 [ 39.012637] __x64_sys_mprotect+0x78/0xc0 [ 39.013160] do_syscall_64+0x3f/0x90 [ 39.013641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.014283] [ 39.014496] Freed by task 19: [ 39.014889] kasan_save_stack+0x22/0x50 [ 39.015394] kasan_set_track+0x25/0x30 [ 39.015893] kasan_save_free_info+0x2b/0x50 [ 39.016445] __kasan_slab_free+0x10a/0x190 [ 39.016980] kmem_cache_free+0x10d/0x4d0 [ 39.017495] rcu_core+0x8c8/0x2860 [ 39.017945] __do_softirq+0x1b7/0x7d4 [ 39.018423] [ 39.018638] Last potentially related work creation: [ 39.019249] kasan_save_stack+0x22/0x50 [ 39.019751] __kasan_record_aux_stack+0x8e/0xa0 [ 39.020386] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.021042] remove_vma+0x139/0x170 [ 39.021493] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.022060] do_vmi_munmap+0x1f1/0x2b0 [ 39.022549] __vm_munmap+0x138/0x3a0 [ 39.023014] __x64_sys_munmap+0x59/0x80 [ 39.023512] do_syscall_64+0x3f/0x90 [ 39.023987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.024650] [ 39.024867] Second to last potentially related work creation: [ 39.025554] kasan_save_stack+0x22/0x50 [ 39.026057] __kasan_record_aux_stack+0x8e/0xa0 [ 39.026627] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.027272] remove_vma+0x139/0x170 [ 39.027719] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.028274] do_vmi_munmap+0x1f1/0x2b0 [ 39.028778] mmap_region+0x1f9/0x2660 [ 39.029258] do_mmap+0x854/0xf00 [ 39.029687] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.030173] ksys_mmap_pgoff+0x3af/0x500 [ 39.030674] do_syscall_64+0x3f/0x90 [ 39.031148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.031791] [ 39.032007] The buggy address belongs to the object at ffff88800eec4570 [ 39.032007] which belongs to the cache vm_area_struct of size 168 [ 39.033491] The buggy address is located 88 bytes inside of [ 39.033491] freed 168-byte region [ffff88800eec4570, ffff88800eec4618) [ 39.034901] [ 39.035115] The buggy address belongs to the physical page: [ 39.035774] page:00000000246d7d40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeec4 [ 39.036859] memcg:ffff88800e575001 [ 39.037282] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.037981] page_type: 0xffffffff() [ 39.038433] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 39.039351] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e575001 [ 39.040253] page dumped because: kasan: bad access detected [ 39.040932] [ 39.041147] Memory state around the buggy address: [ 39.041736] ffff88800eec4480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.042587] ffff88800eec4500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 39.043437] >ffff88800eec4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.044297] ^ [ 39.044976] ffff88800eec4600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 39.045834] ffff88800eec4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.046691] ================================================================== [ 39.047789] Disabling lock debugging due to kernel taint [ 41.582406] BUG: Bad rss-counter state mm:0000000060d9b73f type:MM_FILEPAGES val:33 [ 41.583009] BUG: Bad rss-counter state mm:0000000060d9b73f type:MM_ANONPAGES val:22 [ 41.964522] BUG: Bad rss-counter state mm:000000002a19427b type:MM_FILEPAGES val:33 [ 41.965795] BUG: Bad rss-counter state mm:000000002a19427b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5095' (ECDSA) to the list of known hosts. 2023/06/20 18:53:15 fuzzer started 2023/06/20 18:53:15 dialing manager at localhost:36067 2023/06/20 18:53:15 checking machine... 2023/06/20 18:53:15 checking revisions... [ 42.604096] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:53:15 testing simple program... [ 42.656954] cgroup: Unknown subsys name 'net' [ 42.714898] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:53:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016353e20 RCX=ffffffff8165612a RDX=ffff888016b051c0 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffea0000626300 RSP=ffff8880094f79c8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=0000000000000293 R13=ffff888016354050 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff814c027c RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fba19a0f900 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=00007fba18e07c50 CR3=000000000c626000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7c536031575a4c9300000000000ae988 XMM05=b7b4f620f1291d510000000000133530 XMM06=bdf2e299e47b49d50000000000132260 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88800ed176d0 RSI=ffffffff836827d9 RDI=ffff88800ed176d0 RBP=ffff88800ed17768 RSP=ffff88800ed176b8 R8 =0000000000000001 R9 =ffff88800ed17710 R10=0000000000038001 R11=000000000008b7d7 R12=ffff88800ed17798 R13=0000000000000000 R14=ffff888019dcd1c0 R15=ffff88800ed176d0 RIP=ffffffff811305e8 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 00007f8693cae900 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=00007fff722bb000 CR3=000000001a228000 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