syzkaller login: [ 118.702732] BUG: Bad rss-counter state mm:000000006be67acd type:MM_FILEPAGES val:33 [ 118.703973] BUG: Bad rss-counter state mm:000000006be67acd type:MM_ANONPAGES val:22 [ 118.881344] ================================================================== [ 118.882419] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 118.883427] Read of size 8 at addr ffff88800983e5c8 by task sshd/221 [ 118.884312] [ 118.884487] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 118.885234] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 118.885861] Call Trace: [ 118.886264] [ 118.886621] dump_stack_lvl+0x91/0xf0 [ 118.887208] print_report+0xcc/0x620 [ 118.887836] ? __virt_addr_valid+0x102/0x340 [ 118.888508] ? vma_interval_tree_remove+0xc75/0xec0 [ 118.889282] ? vma_interval_tree_remove+0xc75/0xec0 [ 118.890049] kasan_report+0xbe/0xf0 [ 118.890645] ? vma_interval_tree_remove+0xc75/0xec0 [ 118.891425] vma_interval_tree_remove+0xc75/0xec0 [ 118.892150] vma_prepare+0xc54/0x11a0 [ 118.892735] __split_vma+0x5af/0x950 [ 118.893347] ? __pfx___split_vma+0x10/0x10 [ 118.894001] ? find_held_lock+0x2c/0x110 [ 118.894658] do_vmi_align_munmap+0x2ba/0x11f0 [ 118.895360] ? lock_is_held_type+0x9f/0x120 [ 118.896005] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 118.896749] ? mtree_range_walk+0x632/0x900 [ 118.897458] ? mas_walk+0x5c7/0x7c0 [ 118.897924] do_vmi_munmap+0x1f1/0x2b0 [ 118.898195] mmap_region+0x1f9/0x2660 [ 118.898469] ? vm_mmap_pgoff+0x15c/0x3a0 [ 118.898747] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 118.899169] ? __pfx_lock_acquire+0x10/0x10 [ 118.899491] ? __pfx_mmap_region+0x10/0x10 [ 118.899800] ? security_mmap_addr+0x7d/0xa0 [ 118.900114] ? get_unmapped_area+0x1f5/0x3f0 [ 118.900446] do_mmap+0x854/0xf00 [ 118.900708] vm_mmap_pgoff+0x1a6/0x3a0 [ 118.901014] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 118.901356] ksys_mmap_pgoff+0x3af/0x500 [ 118.901646] do_syscall_64+0x3f/0x90 [ 118.901926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 118.902313] RIP: 0033:0x7fbb45d8cd82 [ 118.902574] 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 [ 118.903838] RSP: 002b:00007ffd5bb5e598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 118.904389] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb45d8cd82 [ 118.904899] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb451c6000 [ 118.905417] RBP: 00007fbb451c6000 R08: 0000000000000009 R09: 0000000000001000 [ 118.905922] R10: 0000000000000812 R11: 0000000000000206 R12: 00005634b451cec0 [ 118.906428] R13: 00007ffd5bb5e5b0 R14: 00007ffd5bb5e5e0 R15: 00007ffd5bb5e940 [ 118.906938] [ 118.907106] [ 118.907233] Allocated by task 214: [ 118.907499] kasan_save_stack+0x22/0x50 [ 118.907793] kasan_set_track+0x25/0x30 [ 118.908074] __kasan_slab_alloc+0x59/0x70 [ 118.908386] kmem_cache_alloc+0x16b/0x370 [ 118.908692] vm_area_dup+0x20/0x160 [ 118.908958] __split_vma+0x170/0x950 [ 118.909249] split_vma+0xc6/0x110 [ 118.909507] mprotect_fixup+0x8d2/0xb30 [ 118.909807] do_mprotect_pkey+0x87e/0xd40 [ 118.910116] __x64_sys_mprotect+0x78/0xc0 [ 118.910434] do_syscall_64+0x3f/0x90 [ 118.910709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 118.911091] [ 118.911222] Freed by task 32: [ 118.911458] kasan_save_stack+0x22/0x50 [ 118.911751] kasan_set_track+0x25/0x30 [ 118.912047] kasan_save_free_info+0x2b/0x50 [ 118.912368] __kasan_slab_free+0x10a/0x190 [ 118.912683] kmem_cache_free+0x10d/0x4d0 [ 118.912977] rcu_core+0x8c8/0x2860 [ 118.913259] __do_softirq+0x1b7/0x7d4 [ 118.913543] [ 118.913673] Last potentially related work creation: [ 118.914020] kasan_save_stack+0x22/0x50 [ 118.914318] __kasan_record_aux_stack+0x8e/0xa0 [ 118.914660] __call_rcu_common.constprop.0+0x6a/0xb90 [ 118.915034] remove_vma+0x139/0x170 [ 118.915309] do_vmi_align_munmap+0xd4a/0x11f0 [ 118.915641] do_vmi_munmap+0x1f1/0x2b0 [ 118.915920] __vm_munmap+0x138/0x3a0 [ 118.916188] __x64_sys_munmap+0x59/0x80 [ 118.916486] do_syscall_64+0x3f/0x90 [ 118.916763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 118.917147] [ 118.917281] Second to last potentially related work creation: [ 118.917698] kasan_save_stack+0x22/0x50 [ 118.917984] __kasan_record_aux_stack+0x8e/0xa0 [ 118.918326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 118.918710] remove_vma+0x139/0x170 [ 118.918968] do_vmi_align_munmap+0xd4a/0x11f0 [ 118.919305] do_vmi_munmap+0x1f1/0x2b0 [ 118.919586] mmap_region+0x1f9/0x2660 [ 118.919863] do_mmap+0x854/0xf00 [ 118.920120] vm_mmap_pgoff+0x1a6/0x3a0 [ 118.920420] ksys_mmap_pgoff+0x3af/0x500 [ 118.920719] do_syscall_64+0x3f/0x90 [ 118.921004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 118.921385] [ 118.921507] The buggy address belongs to the object at ffff88800983e570 [ 118.921507] which belongs to the cache vm_area_struct of size 168 [ 118.922381] The buggy address is located 88 bytes inside of [ 118.922381] freed 168-byte region [ffff88800983e570, ffff88800983e618) [ 118.923207] [ 118.923337] The buggy address belongs to the physical page: [ 118.923736] page:000000004103fd94 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x983e [ 118.924382] memcg:ffff88800ea71001 [ 118.924633] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 118.925057] page_type: 0xffffffff() [ 118.925323] raw: 0100000000000200 ffff88800879fc80 ffffea00003f1e00 dead000000000005 [ 118.925870] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea71001 [ 118.926417] page dumped because: kasan: bad access detected [ 118.926803] [ 118.926927] Memory state around the buggy address: [ 118.927281] ffff88800983e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 118.927783] ffff88800983e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 118.928303] >ffff88800983e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 118.928814] ^ [ 118.929239] ffff88800983e600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 118.929742] ffff88800983e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 118.930253] ================================================================== [ 118.930975] Disabling lock debugging due to kernel taint [ 120.244252] BUG: Bad rss-counter state mm:000000008e0e65ef type:MM_FILEPAGES val:33 [ 120.245246] BUG: Bad rss-counter state mm:000000008e0e65ef type:MM_ANONPAGES val:22 [ 120.731145] BUG: Bad rss-counter state mm:00000000767a1bce type:MM_FILEPAGES val:33 [ 120.732147] BUG: Bad rss-counter state mm:00000000767a1bce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55285' (ECDSA) to the list of known hosts. 2023/06/19 11:13:25 fuzzer started 2023/06/19 11:13:25 dialing manager at localhost:44161 2023/06/19 11:13:25 checking machine... 2023/06/19 11:13:25 checking revisions... [ 121.447180] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:13:25 testing simple program... [ 121.503884] cgroup: Unknown subsys name 'net' [ 121.545553] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:11:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fbe45d01000 CR3=000000000cb44000 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=ffa45bc1fd3a4f926846d6923365badb XMM02=00000000001257a0ec2efd57dc4c00df XMM03=000000000012cce86b100fcc25a72753 XMM04=abe7f3df88812a0f00000000000ae988 XMM05=ca1c4248fa7bcbee000000000013df00 XMM06=c291bd5c70af25b9000000000013d8f8 XMM07=e042d86d42eb936e000000000012cf68 XMM08=6b100fcc25a727530000000000125800 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=00007f0dfaa7e618 CR3=000000000e4e8000 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=2035323a33313a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a33313a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000