syzkaller login: [ 31.301882] BUG: Bad rss-counter state mm:00000000fe5a4d0f type:MM_FILEPAGES val:33 [ 31.302571] BUG: Bad rss-counter state mm:00000000fe5a4d0f type:MM_ANONPAGES val:22 [ 31.425302] ================================================================== [ 31.425948] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.426582] Read of size 8 at addr ffff88800ebcc058 by task sshd/221 [ 31.427104] [ 31.427252] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.427834] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.428504] Call Trace: [ 31.428729] [ 31.428919] dump_stack_lvl+0x91/0xf0 [ 31.429280] print_report+0xcc/0x620 [ 31.429715] ? __virt_addr_valid+0x102/0x340 [ 31.430107] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.430517] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.430935] kasan_report+0xbe/0xf0 [ 31.431261] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.431680] vma_interval_tree_remove+0xc75/0xec0 [ 31.432097] vma_prepare+0xc54/0x11a0 [ 31.432421] __split_vma+0x5af/0x950 [ 31.432741] ? __pfx___split_vma+0x10/0x10 [ 31.433097] ? find_held_lock+0x2c/0x110 [ 31.433466] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.433849] ? lock_is_held_type+0x9f/0x120 [ 31.434218] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.434632] ? mtree_range_walk+0x632/0x900 [ 31.435012] ? mas_walk+0x5c7/0x7c0 [ 31.435345] do_vmi_munmap+0x1f1/0x2b0 [ 31.435686] mmap_region+0x1f9/0x2660 [ 31.436018] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.436386] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.436887] ? __pfx_lock_acquire+0x10/0x10 [ 31.437300] ? __pfx_mmap_region+0x10/0x10 [ 31.437651] ? security_mmap_addr+0x7d/0xa0 [ 31.438038] ? get_unmapped_area+0x1f5/0x3f0 [ 31.438429] do_mmap+0x854/0xf00 [ 31.438749] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.439100] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.439508] ksys_mmap_pgoff+0x3af/0x500 [ 31.439856] do_syscall_64+0x3f/0x90 [ 31.440216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.440681] RIP: 0033:0x7f3cfc63cd82 [ 31.441011] 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 [ 31.442522] RSP: 002b:00007fffcb850918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.443169] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3cfc63cd82 [ 31.443756] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3cfba76000 [ 31.444342] RBP: 00007f3cfba76000 R08: 0000000000000009 R09: 0000000000001000 [ 31.444963] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b74b35f60 [ 31.445563] R13: 00007fffcb850930 R14: 00007fffcb850960 R15: 00007fffcb850cc0 [ 31.446172] [ 31.446393] [ 31.446545] Allocated by task 214: [ 31.446843] kasan_save_stack+0x22/0x50 [ 31.447195] kasan_set_track+0x25/0x30 [ 31.447564] __kasan_slab_alloc+0x59/0x70 [ 31.447926] kmem_cache_alloc+0x16b/0x370 [ 31.448294] vm_area_dup+0x20/0x160 [ 31.448608] __split_vma+0x170/0x950 [ 31.448931] split_vma+0xc6/0x110 [ 31.449237] mprotect_fixup+0x8d2/0xb30 [ 31.449567] do_mprotect_pkey+0x87e/0xd40 [ 31.449949] __x64_sys_mprotect+0x78/0xc0 [ 31.450314] do_syscall_64+0x3f/0x90 [ 31.450649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.451097] [ 31.451274] Freed by task 19: [ 31.451527] kasan_save_stack+0x22/0x50 [ 31.451861] kasan_set_track+0x25/0x30 [ 31.452196] kasan_save_free_info+0x2b/0x50 [ 31.452550] __kasan_slab_free+0x10a/0x190 [ 31.452910] kmem_cache_free+0x10d/0x4d0 [ 31.453271] rcu_core+0x8c8/0x2860 [ 31.453555] __do_softirq+0x1b7/0x7d4 [ 31.453865] [ 31.454002] Last potentially related work creation: [ 31.454382] kasan_save_stack+0x22/0x50 [ 31.454718] __kasan_record_aux_stack+0x8e/0xa0 [ 31.455099] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.455535] remove_vma+0x139/0x170 [ 31.455853] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.456246] do_vmi_munmap+0x1f1/0x2b0 [ 31.456585] __vm_munmap+0x138/0x3a0 [ 31.456903] __x64_sys_munmap+0x59/0x80 [ 31.457302] do_syscall_64+0x3f/0x90 [ 31.457644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.458091] [ 31.458274] Second to last potentially related work creation: [ 31.458761] kasan_save_stack+0x22/0x50 [ 31.459110] __kasan_record_aux_stack+0x8e/0xa0 [ 31.459507] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.459974] remove_vma+0x139/0x170 [ 31.460301] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.460690] do_vmi_munmap+0x1f1/0x2b0 [ 31.461029] mmap_region+0x1f9/0x2660 [ 31.461393] do_mmap+0x854/0xf00 [ 31.461698] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.462048] ksys_mmap_pgoff+0x3af/0x500 [ 31.462403] do_syscall_64+0x3f/0x90 [ 31.462739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.463192] [ 31.463346] The buggy address belongs to the object at ffff88800ebcc000 [ 31.463346] which belongs to the cache vm_area_struct of size 168 [ 31.464369] The buggy address is located 88 bytes inside of [ 31.464369] freed 168-byte region [ffff88800ebcc000, ffff88800ebcc0a8) [ 31.465373] [ 31.465527] The buggy address belongs to the physical page: [ 31.466006] page:00000000608d69eb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebcc [ 31.466775] memcg:ffff88800ebc3101 [ 31.467073] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.467561] page_type: 0xffffffff() [ 31.467884] raw: 0100000000000200 ffff8880087a0c80 ffffea0000671c00 0000000000000003 [ 31.468527] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebc3101 [ 31.469155] page dumped because: kasan: bad access detected [ 31.469655] [ 31.469808] Memory state around the buggy address: [ 31.470221] ffff88800ebcbf00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 31.470807] ffff88800ebcbf80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 31.471414] >ffff88800ebcc000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.472014] ^ [ 31.472523] ffff88800ebcc080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.473129] ffff88800ebcc100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.473745] ================================================================== [ 31.474436] Disabling lock debugging due to kernel taint [ 33.472642] BUG: Bad rss-counter state mm:0000000093c9c49d type:MM_FILEPAGES val:33 [ 33.474012] BUG: Bad rss-counter state mm:0000000093c9c49d type:MM_ANONPAGES val:22 [ 33.845921] BUG: Bad rss-counter state mm:00000000dac2d61b type:MM_FILEPAGES val:33 [ 33.846603] BUG: Bad rss-counter state mm:00000000dac2d61b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17807' (ECDSA) to the list of known hosts. 2023/06/21 08:49:17 fuzzer started 2023/06/21 08:49:17 dialing manager at localhost:36067 2023/06/21 08:49:17 checking machine... 2023/06/21 08:49:17 checking revisions... [ 34.386448] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:49:18 testing simple program... [ 34.435912] cgroup: Unknown subsys name 'net' [ 34.470969] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:49:17 Registers: info registers vcpu 0 RAX=ffffffff83c20963 RBX=ffffffff85fe50d0 RCX=ffffffff83c20cef RDX=0000000000000000 RSI=ffffffff8641379a RDI=ffffffff85fe50d0 RBP=ffffffff85fe50d0 RSP=ffff88806ce099e0 R8 =ffffffff8641379a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000009a9c3 R12=ffffffff85fe50d0 R13=ffffffff85fe50d0 R14=ffffffff85fe50d0 R15=dffffc0000000000 RIP=ffffffff8112fc96 RFL=00000287 [--S--PC] 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 00007f328f022700 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=00007f54246d2c50 CR3=00000000167b6000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a32393735342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323937 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=ffffffff846000aa RBX=000000000000000d RCX=0000000000000001 RDX=0000000000000000 RSI=000000000000000d RDI=ffff888014317878 RBP=dffffc0000000000 RSP=ffff888014317780 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000d R13=0000000000000000 R14=ffff888014317810 R15=0000000000000000 RIP=ffffffff813ad65d 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 00007f6b933cf900 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=00007f6b933ae020 CR3=0000000018c7e000 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