syzkaller login: [ 28.736812] BUG: Bad rss-counter state mm:00000000a08416f0 type:MM_FILEPAGES val:33 [ 28.738024] BUG: Bad rss-counter state mm:00000000a08416f0 type:MM_ANONPAGES val:22 [ 28.886055] ================================================================== [ 28.887123] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.888332] Read of size 8 at addr ffff88800d98b140 by task sshd/219 [ 28.889222] [ 28.889444] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.890314] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.891331] Call Trace: [ 28.891649] [ 28.891945] dump_stack_lvl+0x91/0xf0 [ 28.892457] print_report+0xcc/0x620 [ 28.892946] ? __virt_addr_valid+0x102/0x340 [ 28.893499] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.894118] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.894736] kasan_report+0xbe/0xf0 [ 28.895218] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.895855] vma_interval_tree_remove+0xc75/0xec0 [ 28.896486] vma_prepare+0xc54/0x11a0 [ 28.896987] __split_vma+0x5af/0x950 [ 28.897455] ? __pfx___split_vma+0x10/0x10 [ 28.897981] ? find_held_lock+0x2c/0x110 [ 28.898496] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.899065] ? lock_is_held_type+0x9f/0x120 [ 28.899599] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.900201] ? mtree_range_walk+0x632/0x900 [ 28.900765] ? mas_walk+0x5c7/0x7c0 [ 28.901240] do_vmi_munmap+0x1f1/0x2b0 [ 28.901730] mmap_region+0x1f9/0x2660 [ 28.902210] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.902718] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.903420] ? __pfx_lock_acquire+0x10/0x10 [ 28.903950] ? __pfx_mmap_region+0x10/0x10 [ 28.904511] ? security_mmap_addr+0x7d/0xa0 [ 28.905039] ? get_unmapped_area+0x1f5/0x3f0 [ 28.905593] do_mmap+0x854/0xf00 [ 28.906031] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.906525] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.907084] ksys_mmap_pgoff+0x3af/0x500 [ 28.907586] do_syscall_64+0x3f/0x90 [ 28.908073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.908726] RIP: 0033:0x7fa64d508d82 [ 28.909183] 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 [ 28.911315] RSP: 002b:00007ffc40c37758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.912217] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa64d508d82 [ 28.913072] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa64c942000 [ 28.913914] RBP: 00007fa64c942000 R08: 0000000000000009 R09: 0000000000001000 [ 28.914760] R10: 0000000000000812 R11: 0000000000000206 R12: 000055865041ff60 [ 28.915605] R13: 00007ffc40c37770 R14: 00007ffc40c377a0 R15: 00007ffc40c37b00 [ 28.916472] [ 28.916767] [ 28.916988] Allocated by task 212: [ 28.917417] kasan_save_stack+0x22/0x50 [ 28.917920] kasan_set_track+0x25/0x30 [ 28.918413] __kasan_slab_alloc+0x59/0x70 [ 28.918941] kmem_cache_alloc+0x16b/0x370 [ 28.919453] vm_area_dup+0x20/0x160 [ 28.919918] __split_vma+0x170/0x950 [ 28.920405] split_vma+0xc6/0x110 [ 28.920851] mprotect_fixup+0x8d2/0xb30 [ 28.921355] do_mprotect_pkey+0x87e/0xd40 [ 28.921885] __x64_sys_mprotect+0x78/0xc0 [ 28.922418] do_syscall_64+0x3f/0x90 [ 28.922902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.923560] [ 28.923781] Freed by task 212: [ 28.924173] kasan_save_stack+0x22/0x50 [ 28.924727] kasan_set_track+0x25/0x30 [ 28.925232] kasan_save_free_info+0x2b/0x50 [ 28.925776] __kasan_slab_free+0x10a/0x190 [ 28.926330] kmem_cache_free+0x10d/0x4d0 [ 28.926844] rcu_core+0x8c8/0x2860 [ 28.927292] __do_softirq+0x1b7/0x7d4 [ 28.927778] [ 28.927998] Last potentially related work creation: [ 28.928612] kasan_save_stack+0x22/0x50 [ 28.929124] __kasan_record_aux_stack+0x8e/0xa0 [ 28.929705] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.930350] remove_vma+0x139/0x170 [ 28.930801] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.931360] do_vmi_munmap+0x1f1/0x2b0 [ 28.931851] __vm_munmap+0x138/0x3a0 [ 28.932321] __x64_sys_munmap+0x59/0x80 [ 28.932840] do_syscall_64+0x3f/0x90 [ 28.933323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.933976] [ 28.934197] Second to last potentially related work creation: [ 28.934887] kasan_save_stack+0x22/0x50 [ 28.935395] __kasan_record_aux_stack+0x8e/0xa0 [ 28.935982] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.936638] remove_vma+0x139/0x170 [ 28.937091] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.937662] do_vmi_munmap+0x1f1/0x2b0 [ 28.938153] mmap_region+0x1f9/0x2660 [ 28.938626] do_mmap+0x854/0xf00 [ 28.939064] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.939556] ksys_mmap_pgoff+0x3af/0x500 [ 28.940066] do_syscall_64+0x3f/0x90 [ 28.940564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.941218] [ 28.941444] The buggy address belongs to the object at ffff88800d98b0e8 [ 28.941444] which belongs to the cache vm_area_struct of size 168 [ 28.942943] The buggy address is located 88 bytes inside of [ 28.942943] freed 168-byte region [ffff88800d98b0e8, ffff88800d98b190) [ 28.944367] [ 28.944592] The buggy address belongs to the physical page: [ 28.945270] page:00000000a065c98a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd98b [ 28.946366] memcg:ffff88800e497f01 [ 28.946795] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.947515] page_type: 0xffffffff() [ 28.947984] raw: 0100000000000200 ffff8880087a0c80 ffffea0000327ec0 dead000000000005 [ 28.948918] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e497f01 [ 28.949842] page dumped because: kasan: bad access detected [ 28.950519] [ 28.950735] Memory state around the buggy address: [ 28.951325] ffff88800d98b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.952191] ffff88800d98b080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 28.953074] >ffff88800d98b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.953934] ^ [ 28.954585] ffff88800d98b180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 28.955453] ffff88800d98b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.956322] ================================================================== [ 28.957335] Disabling lock debugging due to kernel taint [ 30.699932] BUG: Bad rss-counter state mm:00000000b70a05fd type:MM_FILEPAGES val:33 [ 30.700577] BUG: Bad rss-counter state mm:00000000b70a05fd type:MM_ANONPAGES val:22 [ 31.198178] BUG: Bad rss-counter state mm:00000000a09e3203 type:MM_FILEPAGES val:33 [ 31.199403] BUG: Bad rss-counter state mm:00000000a09e3203 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63981' (ECDSA) to the list of known hosts. 2023/06/20 19:56:45 fuzzer started 2023/06/20 19:56:45 dialing manager at localhost:36067 2023/06/20 19:56:45 checking machine... 2023/06/20 19:56:45 checking revisions... [ 31.925083] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:56:45 testing simple program... [ 31.975138] cgroup: Unknown subsys name 'net' [ 32.024811] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:56:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b40 RCX=0000000000000001 RDX=1ffff1100d9c1383 RSI=ffffffff813ad720 RDI=ffff88806ce09b4c RBP=ffff88806ce09c18 RSP=ffff88806ce09a58 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff8880168651c0 R15=ffff888019d73600 RIP=ffffffff813ad547 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 00007f221dd60700 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=00007f16c2d76618 CR3=00000000096ee000 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=3a5d3932325b646873732035343a3635 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323530 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=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=00007fd019906670 CR3=000000000cbf4000 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=96110a50089f1595634ee48ff81da7ab XMM02=000000000011a608ec2efd57dc4c00df XMM03=0000000000121760fe922f4f64073cd8 XMM04=19c2a8687fccb4a100000000000ae988 XMM05=a742db86c78d43310000000000133f00 XMM06=4fda316b135da52b0000000000132fa0 XMM07=e042d86d42eb936e00000000001219e0 XMM08=fe922f4f64073cd8000000000011a668 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000