syzkaller login: [ 31.071565] BUG: Bad rss-counter state mm:0000000070b09670 type:MM_FILEPAGES val:33 [ 31.072737] BUG: Bad rss-counter state mm:0000000070b09670 type:MM_ANONPAGES val:22 [ 31.240943] ================================================================== [ 31.242001] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.243249] Read of size 8 at addr ffff88800dd76ed8 by task sshd/219 [ 31.244130] [ 31.244378] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.245371] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.246478] Call Trace: [ 31.246832] [ 31.247164] dump_stack_lvl+0x91/0xf0 [ 31.247723] print_report+0xcc/0x620 [ 31.248288] ? __virt_addr_valid+0x102/0x340 [ 31.248921] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.249614] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.250313] kasan_report+0xbe/0xf0 [ 31.250856] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.251592] vma_interval_tree_remove+0xc75/0xec0 [ 31.252297] vma_prepare+0xc54/0x11a0 [ 31.252854] __split_vma+0x5af/0x950 [ 31.253393] ? __pfx___split_vma+0x10/0x10 [ 31.254023] ? find_held_lock+0x2c/0x110 [ 31.254621] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.255282] ? lock_is_held_type+0x9f/0x120 [ 31.255931] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.256671] ? mtree_range_walk+0x632/0x900 [ 31.257329] ? mas_walk+0x5c7/0x7c0 [ 31.257886] do_vmi_munmap+0x1f1/0x2b0 [ 31.258475] mmap_region+0x1f9/0x2660 [ 31.259047] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.259667] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.260504] ? __pfx_lock_acquire+0x10/0x10 [ 31.261140] ? __pfx_mmap_region+0x10/0x10 [ 31.261759] ? security_mmap_addr+0x7d/0xa0 [ 31.262383] ? get_unmapped_area+0x1f5/0x3f0 [ 31.263035] do_mmap+0x854/0xf00 [ 31.263558] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.264141] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.264793] ksys_mmap_pgoff+0x3af/0x500 [ 31.265379] do_syscall_64+0x3f/0x90 [ 31.265926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.266670] RIP: 0033:0x7fd048e76d82 [ 31.267214] 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 [ 31.269691] RSP: 002b:00007ffea4685898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.270729] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd048e76d82 [ 31.271754] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd0482b0000 [ 31.272733] RBP: 00007fd0482b0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.273715] R10: 0000000000000812 R11: 0000000000000206 R12: 00005558c828dec0 [ 31.274693] R13: 00007ffea46858b0 R14: 00007ffea46858e0 R15: 00007ffea4685c40 [ 31.275698] [ 31.276044] [ 31.276289] Allocated by task 212: [ 31.276777] kasan_save_stack+0x22/0x50 [ 31.277356] kasan_set_track+0x25/0x30 [ 31.277931] __kasan_slab_alloc+0x59/0x70 [ 31.278534] kmem_cache_alloc+0x16b/0x370 [ 31.279124] vm_area_dup+0x20/0x160 [ 31.279668] __split_vma+0x170/0x950 [ 31.280209] split_vma+0xc6/0x110 [ 31.280706] mprotect_fixup+0x8d2/0xb30 [ 31.281283] do_mprotect_pkey+0x87e/0xd40 [ 31.281888] __x64_sys_mprotect+0x78/0xc0 [ 31.282501] do_syscall_64+0x3f/0x90 [ 31.283065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.283815] [ 31.284059] Freed by task 26: [ 31.284495] kasan_save_stack+0x22/0x50 [ 31.285066] kasan_set_track+0x25/0x30 [ 31.285642] kasan_save_free_info+0x2b/0x50 [ 31.286254] __kasan_slab_free+0x10a/0x190 [ 31.286858] kmem_cache_free+0x10d/0x4d0 [ 31.287474] rcu_core+0x8c8/0x2860 [ 31.287979] __do_softirq+0x1b7/0x7d4 [ 31.288545] [ 31.288791] Last potentially related work creation: [ 31.289474] kasan_save_stack+0x22/0x50 [ 31.290045] __kasan_record_aux_stack+0x8e/0xa0 [ 31.290699] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.291463] remove_vma+0x139/0x170 [ 31.291976] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.292600] do_vmi_munmap+0x1f1/0x2b0 [ 31.293152] __vm_munmap+0x138/0x3a0 [ 31.293676] __x64_sys_munmap+0x59/0x80 [ 31.294240] do_syscall_64+0x3f/0x90 [ 31.294780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.295515] [ 31.295757] Second to last potentially related work creation: [ 31.296533] kasan_save_stack+0x22/0x50 [ 31.297119] __kasan_record_aux_stack+0x8e/0xa0 [ 31.297774] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.298496] remove_vma+0x139/0x170 [ 31.299011] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.299659] do_vmi_munmap+0x1f1/0x2b0 [ 31.300233] mmap_region+0x1f9/0x2660 [ 31.300786] do_mmap+0x854/0xf00 [ 31.301287] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.301838] ksys_mmap_pgoff+0x3af/0x500 [ 31.302405] do_syscall_64+0x3f/0x90 [ 31.302939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.303672] [ 31.303915] The buggy address belongs to the object at ffff88800dd76e80 [ 31.303915] which belongs to the cache vm_area_struct of size 168 [ 31.305608] The buggy address is located 88 bytes inside of [ 31.305608] freed 168-byte region [ffff88800dd76e80, ffff88800dd76f28) [ 31.307202] [ 31.307465] The buggy address belongs to the physical page: [ 31.308233] page:0000000091aac30d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd76 [ 31.309469] memcg:ffff888010336801 [ 31.309952] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.310757] page_type: 0xffffffff() [ 31.311276] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 31.312378] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010336801 [ 31.313419] page dumped because: kasan: bad access detected [ 31.314190] [ 31.314436] Memory state around the buggy address: [ 31.315120] ffff88800dd76d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.316130] ffff88800dd76e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.317126] >ffff88800dd76e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.318100] ^ [ 31.318936] ffff88800dd76f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.319938] ffff88800dd76f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.320935] ================================================================== [ 31.322372] Disabling lock debugging due to kernel taint [ 33.925801] BUG: Bad rss-counter state mm:000000008025e942 type:MM_FILEPAGES val:33 [ 33.926773] BUG: Bad rss-counter state mm:000000008025e942 type:MM_ANONPAGES val:22 [ 34.314582] BUG: Bad rss-counter state mm:0000000004e5faec type:MM_FILEPAGES val:33 [ 34.315896] BUG: Bad rss-counter state mm:0000000004e5faec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33579' (ECDSA) to the list of known hosts. 2023/06/20 19:42:48 fuzzer started 2023/06/20 19:42:48 dialing manager at localhost:36067 2023/06/20 19:42:48 checking machine... 2023/06/20 19:42:48 checking revisions... [ 34.911187] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:42:49 testing simple program... [ 34.965136] cgroup: Unknown subsys name 'net' [ 35.022738] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:42:48 Registers: info registers vcpu 0 RAX=1ffff11001d4ed80 RBX=ffff88800ea76c00 RCX=dffffc0000000000 RDX=ffff88800de3b680 RSI=ffffffff844a4e59 RDI=ffff88800ea76cf0 RBP=ffff88800ea76c08 RSP=ffff888016ab7ce8 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000003 R11=0000000000000000 R12=ffff88800ea76c00 R13=0000000000000002 R14=ffff88800ea76c1c R15=ffff888016ab7e59 RIP=ffffffff844a4e6f 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efe2d120900 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=00007fffb40f8d3c CR3=000000000ef54000 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=00000000000000000000000000000000 XMM02=54579323e95f4b414e74be14ff3f14be XMM03=e58ceb4111912237e14d66e78f59fe3e XMM04=dc6d7b767ccb10598e855cd6f89e55e2 XMM05=00000000000000000000000000000000 XMM06=dc6d7b41119110378e4d5cd68f59553e XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f5d5bf846a0 CR3=000000000d6c4000 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=2bf051ab823628b0fe48a8a25df230a1 XMM02=000000000011ac78eff9b2d0a8fce9cb XMM03=000000000011ad482c67c8bc2e329bc3 XMM04=f8fc35d3075fcf2f00000000000ae988 XMM05=dfcdbad4f1609c370000000000133388 XMM06=806171799158d9670000000000133210 XMM07=e042d86d42eb936e00000000001223d0 XMM08=ca2e433a5147e8e4000000000011ad48 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000