syzkaller login: [ 31.841889] BUG: Bad rss-counter state mm:00000000e15472e8 type:MM_FILEPAGES val:33 [ 31.843615] BUG: Bad rss-counter state mm:00000000e15472e8 type:MM_ANONPAGES val:22 [ 32.011125] ================================================================== [ 32.012045] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.012979] Read of size 8 at addr ffff888009ddad08 by task sshd/221 [ 32.013742] [ 32.014059] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.014915] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.015891] Call Trace: [ 32.016229] [ 32.016524] dump_stack_lvl+0x91/0xf0 [ 32.017029] print_report+0xcc/0x620 [ 32.017504] ? __virt_addr_valid+0x102/0x340 [ 32.018056] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.018669] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.019287] kasan_report+0xbe/0xf0 [ 32.019757] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.020388] vma_interval_tree_remove+0xc75/0xec0 [ 32.020986] vma_prepare+0xc54/0x11a0 [ 32.021471] __split_vma+0x5af/0x950 [ 32.021942] ? __pfx___split_vma+0x10/0x10 [ 32.022466] ? find_held_lock+0x2c/0x110 [ 32.022995] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.023550] ? lock_is_held_type+0x9f/0x120 [ 32.024082] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.024696] ? mtree_range_walk+0x632/0x900 [ 32.025260] ? mas_walk+0x5c7/0x7c0 [ 32.025742] do_vmi_munmap+0x1f1/0x2b0 [ 32.026237] mmap_region+0x1f9/0x2660 [ 32.026717] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.027223] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.027939] ? __pfx_lock_acquire+0x10/0x10 [ 32.028487] ? __pfx_mmap_region+0x10/0x10 [ 32.029020] ? security_mmap_addr+0x7d/0xa0 [ 32.029546] ? get_unmapped_area+0x1f5/0x3f0 [ 32.030096] do_mmap+0x854/0xf00 [ 32.030527] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.031019] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.031575] ksys_mmap_pgoff+0x3af/0x500 [ 32.032072] do_syscall_64+0x3f/0x90 [ 32.032556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.033203] RIP: 0033:0x7fd5321e7d82 [ 32.033666] 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 [ 32.035795] RSP: 002b:00007fffce735da8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.036713] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd5321e7d82 [ 32.037570] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd531621000 [ 32.038417] RBP: 00007fd531621000 R08: 0000000000000009 R09: 0000000000001000 [ 32.039274] R10: 0000000000000812 R11: 0000000000000206 R12: 00005562d6724f70 [ 32.040115] R13: 00007fffce735dc0 R14: 00007fffce735df0 R15: 00007fffce736150 [ 32.040989] [ 32.041279] [ 32.041494] Allocated by task 213: [ 32.041929] kasan_save_stack+0x22/0x50 [ 32.042431] kasan_set_track+0x25/0x30 [ 32.042921] __kasan_slab_alloc+0x59/0x70 [ 32.043447] kmem_cache_alloc+0x16b/0x370 [ 32.043954] vm_area_dup+0x20/0x160 [ 32.044418] __split_vma+0x170/0x950 [ 32.044888] split_vma+0xc6/0x110 [ 32.045326] mprotect_fixup+0x8d2/0xb30 [ 32.045834] do_mprotect_pkey+0x87e/0xd40 [ 32.046356] __x64_sys_mprotect+0x78/0xc0 [ 32.046879] do_syscall_64+0x3f/0x90 [ 32.047360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.048004] [ 32.048215] Freed by task 213: [ 32.048616] kasan_save_stack+0x22/0x50 [ 32.049115] kasan_set_track+0x25/0x30 [ 32.049603] kasan_save_free_info+0x2b/0x50 [ 32.050126] __kasan_slab_free+0x10a/0x190 [ 32.050667] kmem_cache_free+0x10d/0x4d0 [ 32.051174] rcu_core+0x8c8/0x2860 [ 32.051619] __do_softirq+0x1b7/0x7d4 [ 32.052102] [ 32.052330] Last potentially related work creation: [ 32.052918] kasan_save_stack+0x22/0x50 [ 32.053420] __kasan_record_aux_stack+0x8e/0xa0 [ 32.054005] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.054642] remove_vma+0x139/0x170 [ 32.055095] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.055655] do_vmi_munmap+0x1f1/0x2b0 [ 32.056145] __vm_munmap+0x138/0x3a0 [ 32.056624] __x64_sys_munmap+0x59/0x80 [ 32.057125] do_syscall_64+0x3f/0x90 [ 32.057608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.058253] [ 32.058468] The buggy address belongs to the object at ffff888009ddacb0 [ 32.058468] which belongs to the cache vm_area_struct of size 168 [ 32.059967] The buggy address is located 88 bytes inside of [ 32.059967] freed 168-byte region [ffff888009ddacb0, ffff888009ddad58) [ 32.061422] [ 32.061643] The buggy address belongs to the physical page: [ 32.062325] page:0000000080d6b814 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9dda [ 32.063405] memcg:ffff88800d2a0601 [ 32.063829] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.064491] page_type: 0xffffffff() [ 32.064948] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.065874] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2a0601 [ 32.066794] page dumped because: kasan: bad access detected [ 32.067462] [ 32.067677] Memory state around the buggy address: [ 32.068280] ffff888009ddac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.069161] ffff888009ddac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.070024] >ffff888009ddad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.070881] ^ [ 32.071325] ffff888009ddad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.072181] ffff888009ddae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.073037] ================================================================== [ 32.074155] Disabling lock debugging due to kernel taint [ 34.225853] BUG: Bad rss-counter state mm:00000000fea0c810 type:MM_FILEPAGES val:33 [ 34.226872] BUG: Bad rss-counter state mm:00000000fea0c810 type:MM_ANONPAGES val:22 [ 34.817263] BUG: Bad rss-counter state mm:000000005b8a601d type:MM_FILEPAGES val:33 [ 34.818463] BUG: Bad rss-counter state mm:000000005b8a601d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21141' (ECDSA) to the list of known hosts. 2023/06/20 20:52:32 fuzzer started 2023/06/20 20:52:33 dialing manager at localhost:36067 2023/06/20 20:52:33 checking machine... 2023/06/20 20:52:33 checking revisions... [ 35.510908] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:52:33 testing simple program... [ 35.564407] cgroup: Unknown subsys name 'net' [ 35.627288] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:52:32 Registers: info registers vcpu 0 RAX=ffffffff815a52ef RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a29d4 RDI=ffffffff852bf968 RBP=ffff888014697d28 RSP=ffff888014697c60 R8 =0000000000000006 R9 =00000000c000003e R10=00000000c000003e R11=0000000000000000 R12=00000000000000a5 R13=ffff888014697d60 R14=00000000000000a5 R15=ffffc90000648080 RIP=ffffffff815a52f3 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 00007f4552c0c900 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=00007f85144d4650 CR3=000000000ca7a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8379ff72cb197b9b00000000000ae988 XMM05=64cd620ace8579a100000000001326c8 XMM06=28fb76f50877845e0000000000131468 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000058 RBX=0000000000000000 RCX=0000000000000000 RDX=00000000000103f6 RSI=ffffffff8219168b RDI=0000000000000007 RBP=00000000000103f6 RSP=ffff88800a2177c8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000103f6 R11=0000000000000128 R12=00000000000103f6 R13=ffff88800f3101a0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8219168f RFL=00000093 [--S-A-C] 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=00007f8513e1f000 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=ffffffff000000000000000000000000 XMM02=ffffffff000000000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007ff3bac54c71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000726f7475636578652d7a7973 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000