syzkaller login: [ 31.110549] BUG: Bad rss-counter state mm:000000005fe04d64 type:MM_FILEPAGES val:33 [ 31.111563] BUG: Bad rss-counter state mm:000000005fe04d64 type:MM_ANONPAGES val:22 [ 31.271344] ================================================================== [ 31.272251] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.273202] Read of size 8 at addr ffff888016426228 by task sshd/219 [ 31.273969] [ 31.274189] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.275246] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.276244] Call Trace: [ 31.276582] [ 31.276910] dump_stack_lvl+0x91/0xf0 [ 31.277408] print_report+0xcc/0x620 [ 31.277900] ? __virt_addr_valid+0x102/0x340 [ 31.278454] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.279085] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.279709] kasan_report+0xbe/0xf0 [ 31.280191] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.280836] vma_interval_tree_remove+0xc75/0xec0 [ 31.281444] vma_prepare+0xc54/0x11a0 [ 31.281937] __split_vma+0x5af/0x950 [ 31.282411] ? __pfx___split_vma+0x10/0x10 [ 31.282944] ? find_held_lock+0x2c/0x110 [ 31.283474] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.284050] ? lock_is_held_type+0x9f/0x120 [ 31.284593] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.285212] ? mtree_range_walk+0x632/0x900 [ 31.285769] ? mas_walk+0x5c7/0x7c0 [ 31.286245] do_vmi_munmap+0x1f1/0x2b0 [ 31.286743] mmap_region+0x1f9/0x2660 [ 31.287229] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.287741] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.288462] ? __pfx_lock_acquire+0x10/0x10 [ 31.289051] ? __pfx_mmap_region+0x10/0x10 [ 31.289584] ? security_mmap_addr+0x7d/0xa0 [ 31.290121] ? get_unmapped_area+0x1f5/0x3f0 [ 31.290683] do_mmap+0x854/0xf00 [ 31.291143] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.291646] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.292219] ksys_mmap_pgoff+0x3af/0x500 [ 31.292738] do_syscall_64+0x3f/0x90 [ 31.293220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.293875] RIP: 0033:0x7fc38714ad82 [ 31.294339] 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 [ 31.296526] RSP: 002b:00007ffc5717b3c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.297462] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc38714ad82 [ 31.298319] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc386584000 [ 31.299167] RBP: 00007fc386584000 R08: 0000000000000009 R09: 0000000000001000 [ 31.300016] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a3d2503f60 [ 31.300868] R13: 00007ffc5717b3e0 R14: 00007ffc5717b410 R15: 00007ffc5717b770 [ 31.301727] [ 31.302026] [ 31.302245] Allocated by task 212: [ 31.302673] kasan_save_stack+0x22/0x50 [ 31.303194] kasan_set_track+0x25/0x30 [ 31.303688] __kasan_slab_alloc+0x59/0x70 [ 31.304222] kmem_cache_alloc+0x16b/0x370 [ 31.304746] vm_area_dup+0x20/0x160 [ 31.305201] __split_vma+0x170/0x950 [ 31.305672] split_vma+0xc6/0x110 [ 31.306118] mprotect_fixup+0x8d2/0xb30 [ 31.306621] do_mprotect_pkey+0x87e/0xd40 [ 31.307145] __x64_sys_mprotect+0x78/0xc0 [ 31.307671] do_syscall_64+0x3f/0x90 [ 31.308150] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.308815] [ 31.309039] Freed by task 212: [ 31.309427] kasan_save_stack+0x22/0x50 [ 31.309930] kasan_set_track+0x25/0x30 [ 31.310428] kasan_save_free_info+0x2b/0x50 [ 31.310960] __kasan_slab_free+0x10a/0x190 [ 31.311493] kmem_cache_free+0x10d/0x4d0 [ 31.312000] rcu_core+0x8c8/0x2860 [ 31.312449] __do_softirq+0x1b7/0x7d4 [ 31.312936] [ 31.313153] Last potentially related work creation: [ 31.313767] kasan_save_stack+0x22/0x50 [ 31.314279] __kasan_record_aux_stack+0x8e/0xa0 [ 31.314860] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.315505] remove_vma+0x139/0x170 [ 31.315961] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.316592] do_vmi_munmap+0x1f1/0x2b0 [ 31.317103] __vm_munmap+0x138/0x3a0 [ 31.317580] __x64_sys_munmap+0x59/0x80 [ 31.318080] do_syscall_64+0x3f/0x90 [ 31.318566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.319210] [ 31.319424] The buggy address belongs to the object at ffff8880164261d0 [ 31.319424] which belongs to the cache vm_area_struct of size 168 [ 31.320897] The buggy address is located 88 bytes inside of [ 31.320897] freed 168-byte region [ffff8880164261d0, ffff888016426278) [ 31.322286] [ 31.322500] The buggy address belongs to the physical page: [ 31.323166] page:000000008b2fe636 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16426 [ 31.324249] memcg:ffff888018d32701 [ 31.324699] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.325354] page_type: 0xffffffff() [ 31.325807] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.326732] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018d32701 [ 31.327639] page dumped because: kasan: bad access detected [ 31.328312] [ 31.328527] Memory state around the buggy address: [ 31.329130] ffff888016426100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.329984] ffff888016426180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.330832] >ffff888016426200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.331687] ^ [ 31.332253] ffff888016426280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.333117] ffff888016426300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.333968] ================================================================== [ 31.334882] Disabling lock debugging due to kernel taint [ 34.060159] BUG: Bad rss-counter state mm:00000000b79d0e64 type:MM_FILEPAGES val:33 [ 34.061297] BUG: Bad rss-counter state mm:00000000b79d0e64 type:MM_ANONPAGES val:22 [ 34.436804] BUG: Bad rss-counter state mm:000000008aca5d5a type:MM_FILEPAGES val:33 [ 34.438002] BUG: Bad rss-counter state mm:000000008aca5d5a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56147' (ECDSA) to the list of known hosts. 2023/06/20 21:42:28 fuzzer started 2023/06/20 21:42:28 dialing manager at localhost:36067 2023/06/20 21:42:28 checking machine... 2023/06/20 21:42:28 checking revisions... [ 35.167533] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:42:28 testing simple program... [ 35.212992] cgroup: Unknown subsys name 'net' [ 35.264476] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:42:28 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff815342db RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88806ce09db8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000287 R13=ffff88800c9e6508 R14=ffffffff813782f8 R15=ffff8880167a9e08 RIP=ffffffff8180f173 RFL=00000083 [--S---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 00007faa8f7d7700 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=00007f83223a1618 CR3=000000000ee14000 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=2037323a32343a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a32343a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000003 RDI=ffff88801658ff58 RBP=0000000000000000 RSP=ffff88801658ff58 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8460009a 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 00007f8321dea900 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=00007fff7a2c4000 CR3=00000000166dc000 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