syzkaller login: [ 32.640154] BUG: Bad rss-counter state mm:0000000017a2eee3 type:MM_FILEPAGES val:33 [ 32.641132] BUG: Bad rss-counter state mm:0000000017a2eee3 type:MM_ANONPAGES val:22 [ 32.818249] ================================================================== [ 32.819238] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.820265] Read of size 8 at addr ffff8880163d0df0 by task sshd/219 [ 32.821210] [ 32.821462] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.822366] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.823433] Call Trace: [ 32.823764] [ 32.824063] dump_stack_lvl+0x91/0xf0 [ 32.824590] print_report+0xcc/0x620 [ 32.825076] ? __virt_addr_valid+0x102/0x340 [ 32.825650] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.826305] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.827054] kasan_report+0xbe/0xf0 [ 32.827663] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.828469] vma_interval_tree_remove+0xc75/0xec0 [ 32.829265] vma_prepare+0xc54/0x11a0 [ 32.829883] __split_vma+0x5af/0x950 [ 32.830507] ? __pfx___split_vma+0x10/0x10 [ 32.831230] ? find_held_lock+0x2c/0x110 [ 32.831908] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.832500] ? lock_is_held_type+0x9f/0x120 [ 32.833050] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.833692] ? mtree_range_walk+0x632/0x900 [ 32.834262] ? mas_walk+0x5c7/0x7c0 [ 32.834765] do_vmi_munmap+0x1f1/0x2b0 [ 32.835302] mmap_region+0x1f9/0x2660 [ 32.835792] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.836356] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.837083] ? __pfx_lock_acquire+0x10/0x10 [ 32.837653] ? __pfx_mmap_region+0x10/0x10 [ 32.838189] ? security_mmap_addr+0x7d/0xa0 [ 32.838744] ? get_unmapped_area+0x1f5/0x3f0 [ 32.839330] do_mmap+0x854/0xf00 [ 32.839781] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.840301] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.840885] ksys_mmap_pgoff+0x3af/0x500 [ 32.841422] do_syscall_64+0x3f/0x90 [ 32.841917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.842599] RIP: 0033:0x7f905df18d82 [ 32.843097] 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 [ 32.845341] RSP: 002b:00007ffe5cd15138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.846276] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f905df18d82 [ 32.847147] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f905d352000 [ 32.848030] RBP: 00007f905d352000 R08: 0000000000000009 R09: 0000000000001000 [ 32.848893] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c145ff8f70 [ 32.849806] R13: 00007ffe5cd15150 R14: 00007ffe5cd15180 R15: 00007ffe5cd154e0 [ 32.850713] [ 32.851012] [ 32.851253] Allocated by task 212: [ 32.851699] kasan_save_stack+0x22/0x50 [ 32.852211] kasan_set_track+0x25/0x30 [ 32.852738] __kasan_slab_alloc+0x59/0x70 [ 32.853304] kmem_cache_alloc+0x16b/0x370 [ 32.853829] vm_area_dup+0x20/0x160 [ 32.854310] __split_vma+0x170/0x950 [ 32.854790] split_vma+0xc6/0x110 [ 32.855250] mprotect_fixup+0x8d2/0xb30 [ 32.855778] do_mprotect_pkey+0x87e/0xd40 [ 32.856330] __x64_sys_mprotect+0x78/0xc0 [ 32.856856] do_syscall_64+0x3f/0x90 [ 32.857365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.858025] [ 32.858243] Freed by task 202: [ 32.858676] kasan_save_stack+0x22/0x50 [ 32.859218] kasan_set_track+0x25/0x30 [ 32.859883] kasan_save_free_info+0x2b/0x50 [ 32.860489] __kasan_slab_free+0x10a/0x190 [ 32.861031] kmem_cache_free+0x10d/0x4d0 [ 32.861563] rcu_core+0x8c8/0x2860 [ 32.862100] __do_softirq+0x1b7/0x7d4 [ 32.862606] [ 32.862825] Last potentially related work creation: [ 32.863446] kasan_save_stack+0x22/0x50 [ 32.863973] __kasan_record_aux_stack+0x8e/0xa0 [ 32.864573] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.865229] remove_vma+0x139/0x170 [ 32.865709] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.866285] do_vmi_munmap+0x1f1/0x2b0 [ 32.866791] __vm_munmap+0x138/0x3a0 [ 32.867301] __x64_sys_munmap+0x59/0x80 [ 32.867804] do_syscall_64+0x3f/0x90 [ 32.868293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.868943] [ 32.869157] The buggy address belongs to the object at ffff8880163d0d98 [ 32.869157] which belongs to the cache vm_area_struct of size 168 [ 32.870680] The buggy address is located 88 bytes inside of [ 32.870680] freed 168-byte region [ffff8880163d0d98, ffff8880163d0e40) [ 32.872131] [ 32.872368] The buggy address belongs to the physical page: [ 32.873028] page:00000000dac16ae6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x163d0 [ 32.874141] memcg:ffff888016072e01 [ 32.874597] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.875273] page_type: 0xffffffff() [ 32.875732] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.876696] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016072e01 [ 32.877629] page dumped because: kasan: bad access detected [ 32.878327] [ 32.878552] Memory state around the buggy address: [ 32.879160] ffff8880163d0c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.880043] ffff8880163d0d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.880925] >ffff8880163d0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.881808] ^ [ 32.882666] ffff8880163d0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.883566] ffff8880163d0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.884443] ================================================================== [ 32.885491] Disabling lock debugging due to kernel taint [ 35.102353] BUG: Bad rss-counter state mm:00000000437c316d type:MM_FILEPAGES val:33 [ 35.103511] BUG: Bad rss-counter state mm:00000000437c316d type:MM_ANONPAGES val:22 [ 35.576495] BUG: Bad rss-counter state mm:00000000d3724eb9 type:MM_FILEPAGES val:33 [ 35.578079] BUG: Bad rss-counter state mm:00000000d3724eb9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3673' (ECDSA) to the list of known hosts. 2023/06/20 04:16:35 fuzzer started 2023/06/20 04:16:35 dialing manager at localhost:44161 2023/06/20 04:16:35 checking machine... 2023/06/20 04:16:35 checking revisions... [ 36.239966] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:16:35 testing simple program... [ 36.289382] cgroup: Unknown subsys name 'net' [ 36.338065] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:16:34 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=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=00007f2fe1551fe0 CR3=0000000014730000 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=2034333a36313a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a36313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81496309 RDX=0000000000004963 RSI=0000000000004963 RDI=ffffffff864fa14c RBP=ffff88800eddf4f0 RSP=ffff88800eddf428 R8 =0000000000000000 R9 =ffff88800eddf4d8 R10=0000000000038001 R11=0000000000091beb R12=ffff88800eddf4f8 R13=ffff88800eddf4e0 R14=ffff88800eddf4d9 R15=ffff88800eddf498 RIP=ffffffff8113077a RFL=00000213 [----A-C] 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 00007fa255cba900 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=00007ffcce4cc000 CR3=000000000ecdc000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000