syzkaller login: [ 28.749444] BUG: Bad rss-counter state mm:00000000e994cda3 type:MM_FILEPAGES val:33 [ 28.751574] BUG: Bad rss-counter state mm:00000000e994cda3 type:MM_ANONPAGES val:22 [ 28.916417] ================================================================== [ 28.917321] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.918275] Read of size 8 at addr ffff888019d715c8 by task sshd/220 [ 28.919052] [ 28.919272] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.920225] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.921213] Call Trace: [ 28.921530] <TASK> [ 28.921838] dump_stack_lvl+0x91/0xf0 [ 28.922333] print_report+0xcc/0x620 [ 28.922833] ? __virt_addr_valid+0x102/0x340 [ 28.923394] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.924019] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.924642] kasan_report+0xbe/0xf0 [ 28.925120] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.925763] vma_interval_tree_remove+0xc75/0xec0 [ 28.926369] vma_prepare+0xc54/0x11a0 [ 28.926873] __split_vma+0x5af/0x950 [ 28.927351] ? __pfx___split_vma+0x10/0x10 [ 28.927882] ? find_held_lock+0x2c/0x110 [ 28.928402] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.928980] ? lock_is_held_type+0x9f/0x120 [ 28.929525] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.930147] ? mtree_range_walk+0x632/0x900 [ 28.930730] ? mas_walk+0x5c7/0x7c0 [ 28.931208] do_vmi_munmap+0x1f1/0x2b0 [ 28.931708] mmap_region+0x1f9/0x2660 [ 28.932204] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.932713] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.933431] ? __pfx_lock_acquire+0x10/0x10 [ 28.933966] ? __pfx_mmap_region+0x10/0x10 [ 28.934516] ? security_mmap_addr+0x7d/0xa0 [ 28.935050] ? get_unmapped_area+0x1f5/0x3f0 [ 28.935608] do_mmap+0x854/0xf00 [ 28.936064] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.936574] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.937141] ksys_mmap_pgoff+0x3af/0x500 [ 28.937660] do_syscall_64+0x3f/0x90 [ 28.938147] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.938804] RIP: 0033:0x7f63a198ed82 [ 28.939268] 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 [ 28.941403] RSP: 002b:00007fffa82ad458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.942317] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f63a198ed82 [ 28.943197] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f63a0dc8000 [ 28.944049] RBP: 00007f63a0dc8000 R08: 0000000000000009 R09: 0000000000001000 [ 28.944901] R10: 0000000000000812 R11: 0000000000000206 R12: 00005573f83d4ec0 [ 28.945747] R13: 00007fffa82ad470 R14: 00007fffa82ad4a0 R15: 00007fffa82ad800 [ 28.946619] </TASK> [ 28.946923] [ 28.947144] Allocated by task 213: [ 28.947568] kasan_save_stack+0x22/0x50 [ 28.948077] kasan_set_track+0x25/0x30 [ 28.948576] __kasan_slab_alloc+0x59/0x70 [ 28.949106] kmem_cache_alloc+0x16b/0x370 [ 28.949625] vm_area_dup+0x20/0x160 [ 28.950089] __split_vma+0x170/0x950 [ 28.950567] split_vma+0xc6/0x110 [ 28.951007] mprotect_fixup+0x8d2/0xb30 [ 28.951508] do_mprotect_pkey+0x87e/0xd40 [ 28.952028] __x64_sys_mprotect+0x78/0xc0 [ 28.952556] do_syscall_64+0x3f/0x90 [ 28.953034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.953680] [ 28.953892] Freed by task 213: [ 28.954292] kasan_save_stack+0x22/0x50 [ 28.954804] kasan_set_track+0x25/0x30 [ 28.955303] kasan_save_free_info+0x2b/0x50 [ 28.955842] __kasan_slab_free+0x10a/0x190 [ 28.956386] kmem_cache_free+0x10d/0x4d0 [ 28.956901] rcu_core+0x8c8/0x2860 [ 28.957343] __do_softirq+0x1b7/0x7d4 [ 28.957830] [ 28.958047] Last potentially related work creation: [ 28.958646] kasan_save_stack+0x22/0x50 [ 28.959148] __kasan_record_aux_stack+0x8e/0xa0 [ 28.959725] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.960371] remove_vma+0x139/0x170 [ 28.960829] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.961394] do_vmi_munmap+0x1f1/0x2b0 [ 28.961883] __vm_munmap+0x138/0x3a0 [ 28.962354] __x64_sys_munmap+0x59/0x80 [ 28.962872] do_syscall_64+0x3f/0x90 [ 28.963351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.964003] [ 28.964217] The buggy address belongs to the object at ffff888019d71570 [ 28.964217] which belongs to the cache vm_area_struct of size 168 [ 28.965708] The buggy address is located 88 bytes inside of [ 28.965708] freed 168-byte region [ffff888019d71570, ffff888019d71618) [ 28.967127] [ 28.967352] The buggy address belongs to the physical page: [ 28.968013] page:0000000090ea299d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d71 [ 28.969108] memcg:ffff8880191e5301 [ 28.969542] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.970193] page_type: 0xffffffff() [ 28.970662] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.971588] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880191e5301 [ 28.972568] page dumped because: kasan: bad access detected [ 28.973229] [ 28.973446] Memory state around the buggy address: [ 28.974032] ffff888019d71480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.974931] ffff888019d71500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 28.975817] >ffff888019d71580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.976678] ^ [ 28.977347] ffff888019d71600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.978207] ffff888019d71680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.979070] ================================================================== [ 28.980034] Disabling lock debugging due to kernel taint [ 30.622595] BUG: Bad rss-counter state mm:00000000f4d22380 type:MM_FILEPAGES val:33 [ 30.623801] BUG: Bad rss-counter state mm:00000000f4d22380 type:MM_ANONPAGES val:22 [ 31.165616] BUG: Bad rss-counter state mm:00000000871660f5 type:MM_FILEPAGES val:33 [ 31.166791] BUG: Bad rss-counter state mm:00000000871660f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4746' (ECDSA) to the list of known hosts. 2023/06/21 05:02:12 fuzzer started 2023/06/21 05:02:12 dialing manager at localhost:36067 2023/06/21 05:02:12 checking machine... 2023/06/21 05:02:12 checking revisions... [ 31.806523] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:02:12 testing simple program... [ 31.863713] cgroup: Unknown subsys name 'net' [ 31.913637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:02:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81390b6c RDX=000000000000390b RSI=000000000000390b RDI=ffffffff864f7e1c RBP=ffff8880187f7920 RSP=ffff8880187f7858 R8 =0000000000000000 R9 =ffff8880187f7908 R10=0000000000038001 R11=0000000000009789 R12=ffff8880187f7928 R13=ffff8880187f7910 R14=ffff8880187f7909 R15=ffff8880187f78c8 RIP=ffffffff8113077a RFL=00000217 [----APC] 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 00007f3d8475e900 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=00007ffdd8ab7000 CR3=000000000e37e000 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=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 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=00007f915a7f4b70 CR3=000000000d826000 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=8434c6804692788dfc4088c3ff3b9926 XMM02=2c67c8bc2e329bc30000000000119ec0 XMM03=fb795ef6d65770560000000000120c10 XMM04=7b9968072acdf7be00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131208 XMM06=911e8710a2b949e50000000000130070 XMM07=e042d86d42eb936e0000000000120e90 XMM08=32ecbdbfaf0c853b0000000000119f20 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000