syzkaller login: [ 30.625978] BUG: Bad rss-counter state mm:000000006c62b2d3 type:MM_FILEPAGES val:33 [ 30.627236] BUG: Bad rss-counter state mm:000000006c62b2d3 type:MM_ANONPAGES val:22 [ 30.800375] ================================================================== [ 30.801347] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.802405] Read of size 8 at addr ffff888019797798 by task sshd/219 [ 30.803235] [ 30.803472] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.804399] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.805440] Call Trace: [ 30.805775] [ 30.806076] dump_stack_lvl+0x91/0xf0 [ 30.806592] print_report+0xcc/0x620 [ 30.807121] ? __virt_addr_valid+0x102/0x340 [ 30.807746] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.808437] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.809115] kasan_report+0xbe/0xf0 [ 30.809637] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.810314] vma_interval_tree_remove+0xc75/0xec0 [ 30.810971] vma_prepare+0xc54/0x11a0 [ 30.811493] __split_vma+0x5af/0x950 [ 30.812016] ? __pfx___split_vma+0x10/0x10 [ 30.812599] ? find_held_lock+0x2c/0x110 [ 30.813170] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.813787] ? lock_is_held_type+0x9f/0x120 [ 30.814390] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.815060] ? mtree_range_walk+0x632/0x900 [ 30.815677] ? mas_walk+0x5c7/0x7c0 [ 30.816203] do_vmi_munmap+0x1f1/0x2b0 [ 30.816732] mmap_region+0x1f9/0x2660 [ 30.817247] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.817789] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.818542] ? __pfx_lock_acquire+0x10/0x10 [ 30.819104] ? __pfx_mmap_region+0x10/0x10 [ 30.819748] ? security_mmap_addr+0x7d/0xa0 [ 30.820336] ? get_unmapped_area+0x1f5/0x3f0 [ 30.820920] do_mmap+0x854/0xf00 [ 30.821390] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.821919] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.822521] ksys_mmap_pgoff+0x3af/0x500 [ 30.823059] do_syscall_64+0x3f/0x90 [ 30.823581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.824294] RIP: 0033:0x7fc9e7d43d82 [ 30.824782] 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 [ 30.827039] RSP: 002b:00007fffb74b6658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.828015] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc9e7d43d82 [ 30.828912] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc9e717d000 [ 30.829806] RBP: 00007fc9e717d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.830704] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560fa6fcbf70 [ 30.831596] R13: 00007fffb74b6670 R14: 00007fffb74b66a0 R15: 00007fffb74b6a00 [ 30.832521] [ 30.832833] [ 30.833063] Allocated by task 212: [ 30.833516] kasan_save_stack+0x22/0x50 [ 30.834059] kasan_set_track+0x25/0x30 [ 30.834582] __kasan_slab_alloc+0x59/0x70 [ 30.835136] kmem_cache_alloc+0x16b/0x370 [ 30.835706] vm_area_dup+0x20/0x160 [ 30.836193] __split_vma+0x170/0x950 [ 30.836690] split_vma+0xc6/0x110 [ 30.837156] mprotect_fixup+0x8d2/0xb30 [ 30.837687] do_mprotect_pkey+0x87e/0xd40 [ 30.838234] __x64_sys_mprotect+0x78/0xc0 [ 30.838790] do_syscall_64+0x3f/0x90 [ 30.839294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.839976] [ 30.840206] Freed by task 212: [ 30.840624] kasan_save_stack+0x22/0x50 [ 30.841156] kasan_set_track+0x25/0x30 [ 30.841682] kasan_save_free_info+0x2b/0x50 [ 30.842244] __kasan_slab_free+0x10a/0x190 [ 30.842808] kmem_cache_free+0x10d/0x4d0 [ 30.843346] rcu_core+0x8c8/0x2860 [ 30.843828] __do_softirq+0x1b7/0x7d4 [ 30.844338] [ 30.844567] Last potentially related work creation: [ 30.845191] kasan_save_stack+0x22/0x50 [ 30.845723] __kasan_record_aux_stack+0x8e/0xa0 [ 30.846330] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.847010] remove_vma+0x139/0x170 [ 30.847488] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.848092] do_vmi_munmap+0x1f1/0x2b0 [ 30.848613] __vm_munmap+0x138/0x3a0 [ 30.849110] __x64_sys_munmap+0x59/0x80 [ 30.849635] do_syscall_64+0x3f/0x90 [ 30.850141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.850822] [ 30.851051] The buggy address belongs to the object at ffff888019797740 [ 30.851051] which belongs to the cache vm_area_struct of size 168 [ 30.852627] The buggy address is located 88 bytes inside of [ 30.852627] freed 168-byte region [ffff888019797740, ffff8880197977e8) [ 30.854143] [ 30.854372] The buggy address belongs to the physical page: [ 30.855079] page:00000000fecb7274 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19797 [ 30.856268] memcg:ffff888017c78001 [ 30.856719] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.857408] page_type: 0xffffffff() [ 30.857882] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.858863] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017c78001 [ 30.859834] page dumped because: kasan: bad access detected [ 30.860534] [ 30.860759] Memory state around the buggy address: [ 30.861374] ffff888019797680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.862281] ffff888019797700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.863192] >ffff888019797780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.864315] ^ [ 30.864953] ffff888019797800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.866049] ffff888019797880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.867155] ================================================================== [ 30.868477] Disabling lock debugging due to kernel taint [ 32.961965] BUG: Bad rss-counter state mm:000000008ddec9f6 type:MM_FILEPAGES val:33 [ 32.963295] BUG: Bad rss-counter state mm:000000008ddec9f6 type:MM_ANONPAGES val:22 [ 33.393135] BUG: Bad rss-counter state mm:0000000046b22c4c type:MM_FILEPAGES val:33 [ 33.394274] BUG: Bad rss-counter state mm:0000000046b22c4c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36139' (ECDSA) to the list of known hosts. 2023/06/20 16:37:18 fuzzer started 2023/06/20 16:37:18 dialing manager at localhost:36067 2023/06/20 16:37:18 checking machine... 2023/06/20 16:37:18 checking revisions... [ 34.122931] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:37:18 testing simple program... [ 34.170337] cgroup: Unknown subsys name 'net' [ 34.207688] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:37:18 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=ffff888008c04000 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=00007fd14dd248b0 CR3=000000000c804000 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=7d75d63381bf2f803c4051c7a852639a XMM02=0000000000119a50ec2efd57dc4c00df XMM03=00000000001213d09a93374c8d076af9 XMM04=e210f7a537754a3800000000000ae988 XMM05=dfcdbad4f1609c370000000000131230 XMM06=185e8e4226723c760000000000130098 XMM07=e042d86d42eb936e0000000000121650 XMM08=9a93374c8d076af90000000000119ab0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110019ef059 RBX=dffffc0000000000 RCX=ffffffff812e0135 RDX=1ffff110019ef05a RSI=ffffffff87b89f80 RDI=ffff88800cf782d8 RBP=ffff88800dc18658 RSP=ffff88801651fd08 R8 =0000000000000001 R9 =ffffed1002ca3f99 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800cf782c8 R13=fffffbfff0f713f0 R14=0000000000000000 R15=ffffffff87b89f80 RIP=ffffffff844d25ff RFL=00000046 [---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 00007f851af2a900 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=00007ffc4e0da000 CR3=000000000ea42000 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=6720646572637465733a4d41503d706f 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