syzkaller login: [ 31.121026] BUG: Bad rss-counter state mm:00000000ac0b0228 type:MM_FILEPAGES val:33 [ 31.122026] BUG: Bad rss-counter state mm:00000000ac0b0228 type:MM_ANONPAGES val:22 [ 31.249437] ================================================================== [ 31.250147] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.250877] Read of size 8 at addr ffff888019ed5ed8 by task sshd/220 [ 31.251487] [ 31.251662] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.252348] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.253211] Call Trace: [ 31.253509] [ 31.253744] dump_stack_lvl+0x91/0xf0 [ 31.254136] print_report+0xcc/0x620 [ 31.254516] ? __virt_addr_valid+0x102/0x340 [ 31.254956] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.255456] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.255952] kasan_report+0xbe/0xf0 [ 31.256331] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.256862] vma_interval_tree_remove+0xc75/0xec0 [ 31.257336] vma_prepare+0xc54/0x11a0 [ 31.257697] __split_vma+0x5af/0x950 [ 31.258008] ? __pfx___split_vma+0x10/0x10 [ 31.258355] ? find_held_lock+0x2c/0x110 [ 31.258699] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.259070] ? lock_is_held_type+0x9f/0x120 [ 31.259424] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.259825] ? mtree_range_walk+0x632/0x900 [ 31.260190] ? mas_walk+0x5c7/0x7c0 [ 31.260516] do_vmi_munmap+0x1f1/0x2b0 [ 31.260877] mmap_region+0x1f9/0x2660 [ 31.261235] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.261589] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.262090] ? __pfx_lock_acquire+0x10/0x10 [ 31.262458] ? __pfx_mmap_region+0x10/0x10 [ 31.262824] ? security_mmap_addr+0x7d/0xa0 [ 31.263190] ? get_unmapped_area+0x1f5/0x3f0 [ 31.263566] do_mmap+0x854/0xf00 [ 31.263861] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.264191] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.264584] ksys_mmap_pgoff+0x3af/0x500 [ 31.264928] do_syscall_64+0x3f/0x90 [ 31.265251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.265695] RIP: 0033:0x7f3eebf2ed82 [ 31.266009] 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 [ 31.267575] RSP: 002b:00007ffe4872d988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.268190] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3eebf2ed82 [ 31.268765] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3eeb368000 [ 31.269323] RBP: 00007f3eeb368000 R08: 0000000000000009 R09: 0000000000001000 [ 31.269881] R10: 0000000000000812 R11: 0000000000000206 R12: 00005598ef34cec0 [ 31.270431] R13: 00007ffe4872d9a0 R14: 00007ffe4872d9d0 R15: 00007ffe4872dd30 [ 31.270996] [ 31.271186] [ 31.271326] Allocated by task 213: [ 31.271607] kasan_save_stack+0x22/0x50 [ 31.271937] kasan_set_track+0x25/0x30 [ 31.272257] __kasan_slab_alloc+0x59/0x70 [ 31.272602] kmem_cache_alloc+0x16b/0x370 [ 31.273007] vm_area_dup+0x20/0x160 [ 31.273331] __split_vma+0x170/0x950 [ 31.273660] split_vma+0xc6/0x110 [ 31.273974] mprotect_fixup+0x8d2/0xb30 [ 31.274325] do_mprotect_pkey+0x87e/0xd40 [ 31.274692] __x64_sys_mprotect+0x78/0xc0 [ 31.275066] do_syscall_64+0x3f/0x90 [ 31.275399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.275837] [ 31.275989] Freed by task 19: [ 31.276256] kasan_save_stack+0x22/0x50 [ 31.276602] kasan_set_track+0x25/0x30 [ 31.276946] kasan_save_free_info+0x2b/0x50 [ 31.277316] __kasan_slab_free+0x10a/0x190 [ 31.277679] kmem_cache_free+0x10d/0x4d0 [ 31.278026] rcu_core+0x8c8/0x2860 [ 31.278342] __do_softirq+0x1b7/0x7d4 [ 31.278665] [ 31.278816] Last potentially related work creation: [ 31.279228] kasan_save_stack+0x22/0x50 [ 31.279574] __kasan_record_aux_stack+0x8e/0xa0 [ 31.279972] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.280414] remove_vma+0x139/0x170 [ 31.280733] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.281130] do_vmi_munmap+0x1f1/0x2b0 [ 31.281468] __vm_munmap+0x138/0x3a0 [ 31.281807] __x64_sys_munmap+0x59/0x80 [ 31.282164] do_syscall_64+0x3f/0x90 [ 31.282500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.282954] [ 31.283105] Second to last potentially related work creation: [ 31.283586] kasan_save_stack+0x22/0x50 [ 31.283937] __kasan_record_aux_stack+0x8e/0xa0 [ 31.284330] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.284738] remove_vma+0x139/0x170 [ 31.285020] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.285363] do_vmi_munmap+0x1f1/0x2b0 [ 31.285663] mmap_region+0x1f9/0x2660 [ 31.285963] do_mmap+0x854/0xf00 [ 31.286234] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.286539] ksys_mmap_pgoff+0x3af/0x500 [ 31.286848] do_syscall_64+0x3f/0x90 [ 31.287146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.287545] [ 31.287681] The buggy address belongs to the object at ffff888019ed5e80 [ 31.287681] which belongs to the cache vm_area_struct of size 168 [ 31.288581] The buggy address is located 88 bytes inside of [ 31.288581] freed 168-byte region [ffff888019ed5e80, ffff888019ed5f28) [ 31.289441] [ 31.289574] The buggy address belongs to the physical page: [ 31.289977] page:00000000657d911e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ed5 [ 31.290642] memcg:ffff888019d5fb01 [ 31.290904] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.291300] page_type: 0xffffffff() [ 31.291574] raw: 0100000000000200 ffff88800879fc80 ffffea000038a040 dead000000000002 [ 31.292134] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d5fb01 [ 31.292702] page dumped because: kasan: bad access detected [ 31.293100] [ 31.293233] Memory state around the buggy address: [ 31.293586] ffff888019ed5d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.294108] ffff888019ed5e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.294626] >ffff888019ed5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.295145] ^ [ 31.295589] ffff888019ed5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.296108] ffff888019ed5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.296630] ================================================================== [ 31.297350] Disabling lock debugging due to kernel taint [ 33.912849] BUG: Bad rss-counter state mm:00000000fab4bd6c type:MM_FILEPAGES val:33 [ 33.914005] BUG: Bad rss-counter state mm:00000000fab4bd6c type:MM_ANONPAGES val:22 [ 34.370952] BUG: Bad rss-counter state mm:0000000090cc2d1f type:MM_FILEPAGES val:33 [ 34.372131] BUG: Bad rss-counter state mm:0000000090cc2d1f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22315' (ECDSA) to the list of known hosts. 2023/06/20 02:56:32 fuzzer started 2023/06/20 02:56:32 dialing manager at localhost:44161 2023/06/20 02:56:32 checking machine... 2023/06/20 02:56:32 checking revisions... [ 35.012983] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:56:32 testing simple program... [ 35.059463] cgroup: Unknown subsys name 'net' [ 35.099045] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:56:31 Registers: info registers vcpu 0 RAX=ffffffff85e02694 RBX=ffffffff85e02690 RCX=ffffffff8185b992 RDX=0000000000000000 RSI=ffffffff8613ffb0 RDI=ffffffff85e0266c RBP=ffffffff85e02694 RSP=ffff88800eff79e8 R8 =ffffffff8613ffb0 R9 =ffff88800eff7ae0 R10=0000000000038001 R11=00000000000224a6 R12=ffffffff85e02694 R13=ffffffff85e0266c R14=ffffffff85e02690 R15=dffffc0000000000 RIP=ffffffff8112fc5a 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 00007ff10506b900 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=00007ff105622618 CR3=000000000d712000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=ffff888008c58400 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=00007fc1e33daf00 CR3=000000000f1d2000 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=2031333a36353a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a36353a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000