syzkaller login: [ 29.698278] BUG: Bad rss-counter state mm:00000000ad8b5579 type:MM_FILEPAGES val:33 [ 29.698880] BUG: Bad rss-counter state mm:00000000ad8b5579 type:MM_ANONPAGES val:22 [ 29.859826] ================================================================== [ 29.860809] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.861832] Read of size 8 at addr ffff888009696d08 by task sshd/221 [ 29.862798] [ 29.863034] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.863963] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.865040] Call Trace: [ 29.865388] [ 29.865694] dump_stack_lvl+0x91/0xf0 [ 29.866177] print_report+0xcc/0x620 [ 29.866653] ? __virt_addr_valid+0x102/0x340 [ 29.867199] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.867797] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.868398] kasan_report+0xbe/0xf0 [ 29.868866] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.869474] vma_interval_tree_remove+0xc75/0xec0 [ 29.870072] vma_prepare+0xc54/0x11a0 [ 29.870541] __split_vma+0x5af/0x950 [ 29.871002] ? __pfx___split_vma+0x10/0x10 [ 29.871519] ? find_held_lock+0x2c/0x110 [ 29.872027] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.872580] ? lock_is_held_type+0x9f/0x120 [ 29.873105] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.873693] ? mtree_range_walk+0x632/0x900 [ 29.874232] ? mas_walk+0x5c7/0x7c0 [ 29.874695] do_vmi_munmap+0x1f1/0x2b0 [ 29.875175] mmap_region+0x1f9/0x2660 [ 29.875641] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.876138] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.876825] ? __pfx_lock_acquire+0x10/0x10 [ 29.877338] ? __pfx_mmap_region+0x10/0x10 [ 29.877870] ? security_mmap_addr+0x7d/0xa0 [ 29.878392] ? get_unmapped_area+0x1f5/0x3f0 [ 29.878933] do_mmap+0x854/0xf00 [ 29.879364] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.879852] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.880402] ksys_mmap_pgoff+0x3af/0x500 [ 29.880906] do_syscall_64+0x3f/0x90 [ 29.881375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.882023] RIP: 0033:0x7f2bf5992d82 [ 29.882468] 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 [ 29.884564] RSP: 002b:00007ffc465a4b08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.885446] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2bf5992d82 [ 29.886293] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2bf4dcc000 [ 29.887121] RBP: 00007f2bf4dcc000 R08: 0000000000000009 R09: 0000000000001000 [ 29.887937] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cef4e48ec0 [ 29.888750] R13: 00007ffc465a4b20 R14: 00007ffc465a4b50 R15: 00007ffc465a4eb0 [ 29.889594] [ 29.889889] [ 29.890097] Allocated by task 214: [ 29.890511] kasan_save_stack+0x22/0x50 [ 29.890998] kasan_set_track+0x25/0x30 [ 29.891474] __kasan_slab_alloc+0x59/0x70 [ 29.891986] kmem_cache_alloc+0x16b/0x370 [ 29.892484] vm_area_dup+0x20/0x160 [ 29.892921] __split_vma+0x170/0x950 [ 29.893370] split_vma+0xc6/0x110 [ 29.893809] mprotect_fixup+0x8d2/0xb30 [ 29.894293] do_mprotect_pkey+0x87e/0xd40 [ 29.894796] __x64_sys_mprotect+0x78/0xc0 [ 29.895297] do_syscall_64+0x3f/0x90 [ 29.895887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.896520] [ 29.896732] Freed by task 214: [ 29.897116] kasan_save_stack+0x22/0x50 [ 29.897641] kasan_set_track+0x25/0x30 [ 29.898137] kasan_save_free_info+0x2b/0x50 [ 29.898683] __kasan_slab_free+0x10a/0x190 [ 29.899213] kmem_cache_free+0x10d/0x4d0 [ 29.899737] rcu_core+0x8c8/0x2860 [ 29.900185] __do_softirq+0x1b7/0x7d4 [ 29.900665] [ 29.900878] Last potentially related work creation: [ 29.901464] kasan_save_stack+0x22/0x50 [ 29.901981] __kasan_record_aux_stack+0x8e/0xa0 [ 29.902552] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.903184] remove_vma+0x139/0x170 [ 29.903705] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.904280] do_vmi_munmap+0x1f1/0x2b0 [ 29.904762] __vm_munmap+0x138/0x3a0 [ 29.905220] __x64_sys_munmap+0x59/0x80 [ 29.905729] do_syscall_64+0x3f/0x90 [ 29.906200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.906963] [ 29.907173] The buggy address belongs to the object at ffff888009696cb0 [ 29.907173] which belongs to the cache vm_area_struct of size 168 [ 29.908604] The buggy address is located 88 bytes inside of [ 29.908604] freed 168-byte region [ffff888009696cb0, ffff888009696d58) [ 29.910005] [ 29.910215] The buggy address belongs to the physical page: [ 29.910861] page:000000008a4ce7dd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9696 [ 29.911912] memcg:ffff888013ddf701 [ 29.912339] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.912962] page_type: 0xffffffff() [ 29.913397] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.914294] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013ddf701 [ 29.915162] page dumped because: kasan: bad access detected [ 29.915803] [ 29.916010] Memory state around the buggy address: [ 29.916571] ffff888009696c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 29.917393] ffff888009696c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.918228] >ffff888009696d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.919053] ^ [ 29.919476] ffff888009696d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.920298] ffff888009696e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.921115] ================================================================== [ 29.922003] Disabling lock debugging due to kernel taint [ 31.842100] BUG: Bad rss-counter state mm:000000000f22d048 type:MM_FILEPAGES val:33 [ 31.843217] BUG: Bad rss-counter state mm:000000000f22d048 type:MM_ANONPAGES val:22 [ 32.335349] BUG: Bad rss-counter state mm:00000000920a846b type:MM_FILEPAGES val:33 [ 32.336451] BUG: Bad rss-counter state mm:00000000920a846b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61251' (ECDSA) to the list of known hosts. 2023/06/20 12:01:37 fuzzer started 2023/06/20 12:01:37 dialing manager at localhost:36067 2023/06/20 12:01:37 checking machine... 2023/06/20 12:01:37 checking revisions... [ 33.065522] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:01:38 testing simple program... [ 33.120695] cgroup: Unknown subsys name 'net' [ 33.184129] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:01:37 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffd21f84c28 CR3=0000000005482000 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=00007f1706baa510000055e8ae3e5790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000a RBX=000055c712453f70 RCX=0000000000000005 RDX=0000000000000c50 RSI=000000000000000a RDI=000055c712462800 RBP=00007ffd49f44ec0 RSP=00007ffd49f44e58 R8 =000055c7124627fb R9 =00007f14acd8cbe0 R10=0000000000000100 R11=0000000000000246 R12=00007f14ac7da900 R13=00007ffd49f44ec8 R14=0000000000000cd5 R15=0000000000000000 RIP=00007f14acd29bc4 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f14ac7da900 00000000 00000000 GS =0000 0000000000000000 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=00007ffd49f3f000 CR3=000000000c618000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=0000000000ff00000000000000000000 XMM02=00000000000000000000000000000000 XMM03=62202965737520786f626d20726f6628 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=626d20726f6628202020202020202023 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000