syzkaller login: [ 38.699423] BUG: Bad rss-counter state mm:000000003629ce4e type:MM_FILEPAGES val:33 [ 38.700756] BUG: Bad rss-counter state mm:000000003629ce4e type:MM_ANONPAGES val:22 [ 38.877183] ================================================================== [ 38.878160] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.879150] Read of size 8 at addr ffff88800e141798 by task sshd/219 [ 38.880105] [ 38.880339] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.881252] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.882312] Call Trace: [ 38.882650] [ 38.882952] dump_stack_lvl+0x91/0xf0 [ 38.883476] print_report+0xcc/0x620 [ 38.884013] ? __virt_addr_valid+0x102/0x340 [ 38.884599] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.885252] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.885903] kasan_report+0xbe/0xf0 [ 38.886408] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887064] vma_interval_tree_remove+0xc75/0xec0 [ 38.887716] vma_prepare+0xc54/0x11a0 [ 38.888225] __split_vma+0x5af/0x950 [ 38.888722] ? __pfx___split_vma+0x10/0x10 [ 38.889287] ? find_held_lock+0x2c/0x110 [ 38.889840] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.890444] ? lock_is_held_type+0x9f/0x120 [ 38.891017] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.891667] ? mtree_range_walk+0x632/0x900 [ 38.892256] ? mas_walk+0x5c7/0x7c0 [ 38.892767] do_vmi_munmap+0x1f1/0x2b0 [ 38.893291] mmap_region+0x1f9/0x2660 [ 38.893805] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.894349] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.895105] ? __pfx_lock_acquire+0x10/0x10 [ 38.895686] ? __pfx_mmap_region+0x10/0x10 [ 38.896249] ? security_mmap_addr+0x7d/0xa0 [ 38.896811] ? get_unmapped_area+0x1f5/0x3f0 [ 38.897399] do_mmap+0x854/0xf00 [ 38.897865] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.898394] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.899000] ksys_mmap_pgoff+0x3af/0x500 [ 38.899541] do_syscall_64+0x3f/0x90 [ 38.900061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.900752] RIP: 0033:0x7f53d23aed82 [ 38.901236] 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 [ 38.903492] RSP: 002b:00007fff73301be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.904474] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f53d23aed82 [ 38.905408] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f53d17e8000 [ 38.906352] RBP: 00007f53d17e8000 R08: 0000000000000009 R09: 0000000000001000 [ 38.907306] R10: 0000000000000812 R11: 0000000000000206 R12: 00005566547f2f70 [ 38.908265] R13: 00007fff73301c00 R14: 00007fff73301c30 R15: 00007fff73301f90 [ 38.909221] [ 38.909544] [ 38.909780] Allocated by task 212: [ 38.910258] kasan_save_stack+0x22/0x50 [ 38.910817] kasan_set_track+0x25/0x30 [ 38.911360] __kasan_slab_alloc+0x59/0x70 [ 38.911944] kmem_cache_alloc+0x16b/0x370 [ 38.912516] vm_area_dup+0x20/0x160 [ 38.913016] __split_vma+0x170/0x950 [ 38.913529] split_vma+0xc6/0x110 [ 38.914016] mprotect_fixup+0x8d2/0xb30 [ 38.914569] do_mprotect_pkey+0x87e/0xd40 [ 38.915147] __x64_sys_mprotect+0x78/0xc0 [ 38.915742] do_syscall_64+0x3f/0x90 [ 38.916265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.916975] [ 38.917211] Freed by task 212: [ 38.917645] kasan_save_stack+0x22/0x50 [ 38.918201] kasan_set_track+0x25/0x30 [ 38.918747] kasan_save_free_info+0x2b/0x50 [ 38.919335] __kasan_slab_free+0x10a/0x190 [ 38.919932] kmem_cache_free+0x10d/0x4d0 [ 38.920500] rcu_core+0x8c8/0x2860 [ 38.920992] __do_softirq+0x1b7/0x7d4 [ 38.921584] [ 38.921824] Last potentially related work creation: [ 38.922472] kasan_save_stack+0x22/0x50 [ 38.923029] __kasan_record_aux_stack+0x8e/0xa0 [ 38.923678] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.924386] remove_vma+0x139/0x170 [ 38.924879] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.925495] do_vmi_munmap+0x1f1/0x2b0 [ 38.926028] __vm_munmap+0x138/0x3a0 [ 38.926547] __x64_sys_munmap+0x59/0x80 [ 38.927090] do_syscall_64+0x3f/0x90 [ 38.927621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.928333] [ 38.928566] Second to last potentially related work creation: [ 38.929323] kasan_save_stack+0x22/0x50 [ 38.929876] __kasan_record_aux_stack+0x8e/0xa0 [ 38.930505] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.931209] remove_vma+0x139/0x170 [ 38.931723] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.932331] do_vmi_munmap+0x1f1/0x2b0 [ 38.932840] mmap_region+0x1f9/0x2660 [ 38.933354] do_mmap+0x854/0xf00 [ 38.933828] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.934347] ksys_mmap_pgoff+0x3af/0x500 [ 38.934881] do_syscall_64+0x3f/0x90 [ 38.935388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.936072] [ 38.936297] The buggy address belongs to the object at ffff88800e141740 [ 38.936297] which belongs to the cache vm_area_struct of size 168 [ 38.937839] The buggy address is located 88 bytes inside of [ 38.937839] freed 168-byte region [ffff88800e141740, ffff88800e1417e8) [ 38.939315] [ 38.939542] The buggy address belongs to the physical page: [ 38.940253] page:000000001ca6fe4b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe141 [ 38.941405] memcg:ffff8880097b5201 [ 38.941866] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.942550] page_type: 0xffffffff() [ 38.943032] raw: 0100000000000200 ffff8880087a0c80 ffffea00005951c0 dead000000000004 [ 38.944018] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097b5201 [ 38.944977] page dumped because: kasan: bad access detected [ 38.945675] [ 38.945903] Memory state around the buggy address: [ 38.946519] ffff88800e141680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.947417] ffff88800e141700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.948339] >ffff88800e141780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.949234] ^ [ 38.949786] ffff88800e141800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.950703] ffff88800e141880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.951599] ================================================================== [ 38.952645] Disabling lock debugging due to kernel taint [ 40.954681] BUG: Bad rss-counter state mm:0000000003df3fdd type:MM_FILEPAGES val:33 [ 40.956210] BUG: Bad rss-counter state mm:0000000003df3fdd type:MM_ANONPAGES val:22 [ 41.534398] BUG: Bad rss-counter state mm:000000001bd3568b type:MM_FILEPAGES val:33 [ 41.535541] BUG: Bad rss-counter state mm:000000001bd3568b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59474' (ECDSA) to the list of known hosts. 2023/06/21 00:30:03 fuzzer started 2023/06/21 00:30:03 dialing manager at localhost:36067 2023/06/21 00:30:03 checking machine... 2023/06/21 00:30:03 checking revisions... [ 42.200041] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:30:03 testing simple program... [ 42.247369] cgroup: Unknown subsys name 'net' [ 42.299896] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:30:03 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000053 RCX=ffffffff8184cf7e RDX=ffff88800c991b40 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff888015a68c53 RSP=ffff888016607870 R8 =0000000000000006 R9 =ffff888015a68c00 R10=ffff888095a68c00 R11=00676f6c2d766564 R12=ffff888015a68c00 R13=0000000000000001 R14=ffff888095a68c00 R15=0000000000000000 RIP=ffffffff814c086b 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 00007fb3c980c700 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=00007f5004ae20b0 CR3=000000000e0be000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732032303a3033 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323931 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=ffff888008c04400 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=00007f4e548a6000 CR3=000000000ca4a000 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=6067c142e0831b81fe4a735f7388644b XMM02=000000000011b888ec2efd57dc4c00df XMM03=0000000000122630d3d7b01f34900e47 XMM04=31498aabd2c0656e00000000000ae988 XMM05=19e9129bd510f2350000000000133e90 XMM06=ba3289192cb1025e00000000001326f0 XMM07=e042d86d42eb936e0000000000122908 XMM08=d3d7b01f34900e47000000000011b8e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000