syzkaller login: [ 59.114925] BUG: Bad rss-counter state mm:0000000066c3ba3c type:MM_FILEPAGES val:33 [ 59.115676] BUG: Bad rss-counter state mm:0000000066c3ba3c type:MM_ANONPAGES val:22 [ 59.247719] ================================================================== [ 59.248348] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.248981] Read of size 8 at addr ffff88801a225968 by task sshd/219 [ 59.249498] [ 59.249637] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 59.250207] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.250873] Call Trace: [ 59.251103] [ 59.251281] dump_stack_lvl+0x91/0xf0 [ 59.251595] print_report+0xcc/0x620 [ 59.251904] ? __virt_addr_valid+0x102/0x340 [ 59.252492] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.252921] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.253355] kasan_report+0xbe/0xf0 [ 59.253731] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.254147] vma_interval_tree_remove+0xc75/0xec0 [ 59.254632] vma_prepare+0xc54/0x11a0 [ 59.254957] __split_vma+0x5af/0x950 [ 59.255308] ? __pfx___split_vma+0x10/0x10 [ 59.255679] ? find_held_lock+0x2c/0x110 [ 59.256030] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.256441] ? lock_is_held_type+0x9f/0x120 [ 59.256822] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.257245] ? mtree_range_walk+0x632/0x900 [ 59.257641] ? mas_walk+0x5c7/0x7c0 [ 59.257977] do_vmi_munmap+0x1f1/0x2b0 [ 59.258390] mmap_region+0x1f9/0x2660 [ 59.258722] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.259107] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.259608] ? __pfx_lock_acquire+0x10/0x10 [ 59.259981] ? __pfx_mmap_region+0x10/0x10 [ 59.260368] ? security_mmap_addr+0x7d/0xa0 [ 59.260778] ? get_unmapped_area+0x1f5/0x3f0 [ 59.261146] do_mmap+0x854/0xf00 [ 59.261439] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.261818] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.262207] ksys_mmap_pgoff+0x3af/0x500 [ 59.262563] do_syscall_64+0x3f/0x90 [ 59.262889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.263420] RIP: 0033:0x7fb144117d82 [ 59.263752] 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 [ 59.265211] RSP: 002b:00007ffca5b70008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.265876] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb144117d82 [ 59.266451] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb143551000 [ 59.267066] RBP: 00007fb143551000 R08: 0000000000000009 R09: 0000000000001000 [ 59.267677] R10: 0000000000000812 R11: 0000000000000206 R12: 00005609ae95aec0 [ 59.268250] R13: 00007ffca5b70020 R14: 00007ffca5b70050 R15: 00007ffca5b703b0 [ 59.268847] [ 59.269079] [ 59.269228] Allocated by task 212: [ 59.269516] kasan_save_stack+0x22/0x50 [ 59.269870] kasan_set_track+0x25/0x30 [ 59.270202] __kasan_slab_alloc+0x59/0x70 [ 59.270572] kmem_cache_alloc+0x16b/0x370 [ 59.270944] vm_area_dup+0x20/0x160 [ 59.271279] __split_vma+0x170/0x950 [ 59.271615] split_vma+0xc6/0x110 [ 59.271930] mprotect_fixup+0x8d2/0xb30 [ 59.272284] do_mprotect_pkey+0x87e/0xd40 [ 59.272677] __x64_sys_mprotect+0x78/0xc0 [ 59.273046] do_syscall_64+0x3f/0x90 [ 59.273374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.273810] [ 59.273969] Freed by task 202: [ 59.274254] kasan_save_stack+0x22/0x50 [ 59.274626] kasan_set_track+0x25/0x30 [ 59.274964] kasan_save_free_info+0x2b/0x50 [ 59.275392] __kasan_slab_free+0x10a/0x190 [ 59.275760] kmem_cache_free+0x10d/0x4d0 [ 59.276098] rcu_core+0x8c8/0x2860 [ 59.276403] __do_softirq+0x1b7/0x7d4 [ 59.276744] [ 59.276903] Last potentially related work creation: [ 59.277296] kasan_save_stack+0x22/0x50 [ 59.277641] __kasan_record_aux_stack+0x8e/0xa0 [ 59.278028] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.278476] remove_vma+0x139/0x170 [ 59.278803] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.279199] do_vmi_munmap+0x1f1/0x2b0 [ 59.279528] __vm_munmap+0x138/0x3a0 [ 59.279838] __x64_sys_munmap+0x59/0x80 [ 59.280157] do_syscall_64+0x3f/0x90 [ 59.280459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.280954] [ 59.281111] The buggy address belongs to the object at ffff88801a225910 [ 59.281111] which belongs to the cache vm_area_struct of size 168 [ 59.282095] The buggy address is located 88 bytes inside of [ 59.282095] freed 168-byte region [ffff88801a225910, ffff88801a2259b8) [ 59.283082] [ 59.283244] The buggy address belongs to the physical page: [ 59.283728] page:00000000b489a31c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a225 [ 59.284530] memcg:ffff88800d7e1601 [ 59.284817] flags: 0x100000000000200(slab|node=0|zone=1) [ 59.285249] page_type: 0xffffffff() [ 59.285558] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 59.286165] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7e1601 [ 59.286780] page dumped because: kasan: bad access detected [ 59.287312] [ 59.287476] Memory state around the buggy address: [ 59.287923] ffff88801a225800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 59.288517] ffff88801a225880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 59.289142] >ffff88801a225900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.289783] ^ [ 59.290301] ffff88801a225980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 59.290879] ffff88801a225a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.291493] ================================================================== [ 59.292294] Disabling lock debugging due to kernel taint [ 61.161127] BUG: Bad rss-counter state mm:00000000da173b1f type:MM_FILEPAGES val:33 [ 61.161793] BUG: Bad rss-counter state mm:00000000da173b1f type:MM_ANONPAGES val:22 [ 61.528611] BUG: Bad rss-counter state mm:0000000095526dee type:MM_FILEPAGES val:33 [ 61.529750] BUG: Bad rss-counter state mm:0000000095526dee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26104' (ECDSA) to the list of known hosts. 2023/06/20 08:58:04 fuzzer started 2023/06/20 08:58:05 dialing manager at localhost:44161 2023/06/20 08:58:05 checking machine... 2023/06/20 08:58:05 checking revisions... [ 62.116457] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:58:05 testing simple program... [ 62.159262] cgroup: Unknown subsys name 'net' [ 62.215668] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:57:36 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff812d8ec3 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88806ce09d78 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180f009 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 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=00007fc746484a50 CR3=000000000d838000 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=637547feb14fdcaaa54b69b512bbe5b5 XMM02=000000000011c948ec2efd57dc4c00df XMM03=0000000000123e88f70728e41359790b XMM04=e227c924327c568e00000000000ae988 XMM05=dfcdbad4f1609c370000000000133990 XMM06=c9dd54cc2ad44c1100000000001327f8 XMM07=e042d86d42eb936e0000000000124108 XMM08=f70728e41359790b000000000011c9a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffea000069cbc0 RCX=ffffffff8170c2be RDX=ffff8880162f9b40 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff88800e7f7790 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00000000ffffffff R13=00007fc4d4f89000 R14=ffff88801a18dc40 R15=dffffc0000000000 RIP=ffffffff814c07e0 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 00007fc4d4fb8900 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=00007fc4d4f97020 CR3=000000000f14c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000