syzkaller login: [ 43.291734] BUG: Bad rss-counter state mm:000000000c849ee3 type:MM_FILEPAGES val:33 [ 43.293017] BUG: Bad rss-counter state mm:000000000c849ee3 type:MM_ANONPAGES val:22 [ 43.457926] ================================================================== [ 43.458921] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.460065] Read of size 8 at addr ffff888016a38880 by task sshd/218 [ 43.460900] [ 43.461137] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.462084] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.463129] Call Trace: [ 43.463478] [ 43.463782] dump_stack_lvl+0x91/0xf0 [ 43.464304] print_report+0xcc/0x620 [ 43.464865] ? __virt_addr_valid+0x102/0x340 [ 43.465468] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.466132] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.466798] kasan_report+0xbe/0xf0 [ 43.467317] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.468003] vma_interval_tree_remove+0xc75/0xec0 [ 43.468657] vma_prepare+0xc54/0x11a0 [ 43.469176] __split_vma+0x5af/0x950 [ 43.469682] ? __pfx___split_vma+0x10/0x10 [ 43.470248] ? find_held_lock+0x2c/0x110 [ 43.470804] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.471419] ? lock_is_held_type+0x9f/0x120 [ 43.471992] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.472655] ? mtree_range_walk+0x632/0x900 [ 43.473246] ? mas_walk+0x5c7/0x7c0 [ 43.473753] do_vmi_munmap+0x1f1/0x2b0 [ 43.474279] mmap_region+0x1f9/0x2660 [ 43.474807] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.475377] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.476169] ? __pfx_lock_acquire+0x10/0x10 [ 43.476772] ? __pfx_mmap_region+0x10/0x10 [ 43.477337] ? security_mmap_addr+0x7d/0xa0 [ 43.477908] ? get_unmapped_area+0x1f5/0x3f0 [ 43.478497] do_mmap+0x854/0xf00 [ 43.478971] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.479503] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.480108] ksys_mmap_pgoff+0x3af/0x500 [ 43.480662] do_syscall_64+0x3f/0x90 [ 43.481172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.481866] RIP: 0033:0x7f357ea77d82 [ 43.482362] 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 [ 43.484716] RSP: 002b:00007fff55e98a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.485693] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f357ea77d82 [ 43.486608] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f357deb1000 [ 43.487522] RBP: 00007f357deb1000 R08: 0000000000000009 R09: 0000000000001000 [ 43.488461] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a9c08bb20 [ 43.489373] R13: 00007fff55e98a80 R14: 00007fff55e98ab0 R15: 00007fff55e98e10 [ 43.490295] [ 43.490609] [ 43.490841] Allocated by task 211: [ 43.491306] kasan_save_stack+0x22/0x50 [ 43.491852] kasan_set_track+0x25/0x30 [ 43.492390] __kasan_slab_alloc+0x59/0x70 [ 43.492961] kmem_cache_alloc+0x16b/0x370 [ 43.493515] vm_area_dup+0x20/0x160 [ 43.494000] __split_vma+0x170/0x950 [ 43.494502] split_vma+0xc6/0x110 [ 43.494980] mprotect_fixup+0x8d2/0xb30 [ 43.495520] do_mprotect_pkey+0x87e/0xd40 [ 43.496092] __x64_sys_mprotect+0x78/0xc0 [ 43.496652] do_syscall_64+0x3f/0x90 [ 43.497163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.497844] [ 43.498073] Freed by task 211: [ 43.498497] kasan_save_stack+0x22/0x50 [ 43.499031] kasan_set_track+0x25/0x30 [ 43.499554] kasan_save_free_info+0x2b/0x50 [ 43.500121] __kasan_slab_free+0x10a/0x190 [ 43.500701] kmem_cache_free+0x10d/0x4d0 [ 43.501241] rcu_core+0x8c8/0x2860 [ 43.501716] __do_softirq+0x1b7/0x7d4 [ 43.502228] [ 43.502460] Last potentially related work creation: [ 43.503086] kasan_save_stack+0x22/0x50 [ 43.503625] __kasan_record_aux_stack+0x8e/0xa0 [ 43.504237] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.504930] remove_vma+0x139/0x170 [ 43.505411] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.506004] do_vmi_munmap+0x1f1/0x2b0 [ 43.506520] __vm_munmap+0x138/0x3a0 [ 43.507026] __x64_sys_munmap+0x59/0x80 [ 43.507554] do_syscall_64+0x3f/0x90 [ 43.508057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.508759] [ 43.508988] The buggy address belongs to the object at ffff888016a38828 [ 43.508988] which belongs to the cache vm_area_struct of size 168 [ 43.510567] The buggy address is located 88 bytes inside of [ 43.510567] freed 168-byte region [ffff888016a38828, ffff888016a388d0) [ 43.512067] [ 43.512297] The buggy address belongs to the physical page: [ 43.513017] page:00000000464ee86d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a38 [ 43.514192] memcg:ffff888016450401 [ 43.514646] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.515392] page_type: 0xffffffff() [ 43.515882] raw: 0100000000000200 ffff88800879fc80 ffffea00005a6ac0 dead000000000005 [ 43.516877] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016450401 [ 43.517855] page dumped because: kasan: bad access detected [ 43.518562] [ 43.518792] Memory state around the buggy address: [ 43.519413] ffff888016a38780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 43.520343] ffff888016a38800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 43.521271] >ffff888016a38880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 43.522185] ^ [ 43.522625] ffff888016a38900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.523551] ffff888016a38980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 43.524472] ================================================================== [ 43.525526] Disabling lock debugging due to kernel taint [ 45.469850] BUG: Bad rss-counter state mm:00000000c9019809 type:MM_FILEPAGES val:33 [ 45.471404] BUG: Bad rss-counter state mm:00000000c9019809 type:MM_ANONPAGES val:22 [ 46.092479] BUG: Bad rss-counter state mm:00000000105cbad2 type:MM_FILEPAGES val:33 [ 46.093699] BUG: Bad rss-counter state mm:00000000105cbad2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53612' (ECDSA) to the list of known hosts. 2023/06/19 22:07:53 fuzzer started 2023/06/19 22:07:53 dialing manager at localhost:44161 2023/06/19 22:07:53 checking machine... 2023/06/19 22:07:53 checking revisions... [ 46.861649] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:07:54 testing simple program... [ 46.909811] cgroup: Unknown subsys name 'net' [ 46.968695] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:07:48 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=00007f48e148019d RDX=0000000040000040 RSI=00007ffe6ffee450 RDI=0000000000000000 RBP=00007ffe6ffee450 RSP=00007ffe6ffee3c8 R8 =0000000000000000 R9 =00007ffe6fff7080 R10=00007ffe6fff70f0 R11=0000000000000293 R12=00007ffe6ffee7d8 R13=000056095e387360 R14=0000000000000100 R15=0000000000000006 RIP=00007f48e1405df0 RFL=00000246 [---Z-P-] 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 00007f48e0bb6900 00000000 00000000 GS =0000 0000000000000000 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=00007f48dffd8000 CR3=0000000009734000 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=d27c5860f83a148b27434b9bf85cd8ed XMM02=eff9b2d0a8fce9cb000000000011e0c8 XMM03=2c67c8bc2e329bc3000000000011e1f0 XMM04=5ea81f581f63e13d00000000000ae988 XMM05=2f126eefc96efb8b0000000000135148 XMM06=19e9129bd510f2350000000000133c38 XMM07=fb795ef6d65770560000000000124418 XMM08=2c67c8bc2e329bc3000000000011e1f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000555e26e39f18 RCX=00007f5d3d7b56c3 RDX=0000000000000006 RSI=0000000000000007 RDI=0000000000000008 RBP=0000000000000000 RSP=00007ffdcfd27298 R8 =0000555e26e4b630 R9 =00007ffdcfd20678 R10=0000555e26e39eb0 R11=0000000000000246 R12=0000000000000008 R13=0000555e26e3a350 R14=0000000000000069 R15=0000000000000000 RIP=ffffffff84600000 RFL=00000002 [-------] 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 00007f5d3d2d2900 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=00007ffdcfd21000 CR3=00000000139fa000 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