syzkaller login: [ 32.059971] BUG: Bad rss-counter state mm:000000007931fae8 type:MM_FILEPAGES val:33 [ 32.061188] BUG: Bad rss-counter state mm:000000007931fae8 type:MM_ANONPAGES val:22 [ 32.198995] ================================================================== [ 32.200071] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.201194] Read of size 8 at addr ffff88800e530880 by task sshd/221 [ 32.202250] [ 32.202478] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.203336] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.204313] Call Trace: [ 32.204631] [ 32.204918] dump_stack_lvl+0x91/0xf0 [ 32.205409] print_report+0xcc/0x620 [ 32.205910] ? __virt_addr_valid+0x102/0x340 [ 32.206466] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.207088] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.207720] kasan_report+0xbe/0xf0 [ 32.208203] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.208820] vma_interval_tree_remove+0xc75/0xec0 [ 32.209434] vma_prepare+0xc54/0x11a0 [ 32.209920] __split_vma+0x5af/0x950 [ 32.210387] ? __pfx___split_vma+0x10/0x10 [ 32.210911] ? find_held_lock+0x2c/0x110 [ 32.211427] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.211994] ? lock_is_held_type+0x9f/0x120 [ 32.212534] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.213140] ? mtree_range_walk+0x632/0x900 [ 32.213718] ? mas_walk+0x5c7/0x7c0 [ 32.214196] do_vmi_munmap+0x1f1/0x2b0 [ 32.214689] mmap_region+0x1f9/0x2660 [ 32.215171] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.215682] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.216396] ? __pfx_lock_acquire+0x10/0x10 [ 32.216931] ? __pfx_mmap_region+0x10/0x10 [ 32.217472] ? security_mmap_addr+0x7d/0xa0 [ 32.218005] ? get_unmapped_area+0x1f5/0x3f0 [ 32.218552] do_mmap+0x854/0xf00 [ 32.218993] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.219498] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.220067] ksys_mmap_pgoff+0x3af/0x500 [ 32.220576] do_syscall_64+0x3f/0x90 [ 32.221055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.221730] RIP: 0033:0x7f61ab944d82 [ 32.222194] 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 [ 32.224324] RSP: 002b:00007ffcdea705c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.225239] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f61ab944d82 [ 32.226114] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f61aad7e000 [ 32.226958] RBP: 00007f61aad7e000 R08: 0000000000000009 R09: 0000000000001000 [ 32.227804] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563460590f70 [ 32.228654] R13: 00007ffcdea705e0 R14: 00007ffcdea70610 R15: 00007ffcdea70970 [ 32.229529] [ 32.229818] [ 32.230042] Allocated by task 214: [ 32.230483] kasan_save_stack+0x22/0x50 [ 32.230999] kasan_set_track+0x25/0x30 [ 32.231491] __kasan_slab_alloc+0x59/0x70 [ 32.232026] kmem_cache_alloc+0x16b/0x370 [ 32.232553] vm_area_dup+0x20/0x160 [ 32.233015] __split_vma+0x170/0x950 [ 32.233506] split_vma+0xc6/0x110 [ 32.233948] mprotect_fixup+0x8d2/0xb30 [ 32.234459] do_mprotect_pkey+0x87e/0xd40 [ 32.234983] __x64_sys_mprotect+0x78/0xc0 [ 32.235511] do_syscall_64+0x3f/0x90 [ 32.235979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.236618] [ 32.236835] Freed by task 214: [ 32.237226] kasan_save_stack+0x22/0x50 [ 32.237736] kasan_set_track+0x25/0x30 [ 32.238229] kasan_save_free_info+0x2b/0x50 [ 32.238766] __kasan_slab_free+0x10a/0x190 [ 32.239297] kmem_cache_free+0x10d/0x4d0 [ 32.239809] rcu_core+0x8c8/0x2860 [ 32.240256] __do_softirq+0x1b7/0x7d4 [ 32.240726] [ 32.240974] Last potentially related work creation: [ 32.241594] kasan_save_stack+0x22/0x50 [ 32.242099] __kasan_record_aux_stack+0x8e/0xa0 [ 32.242676] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.243323] remove_vma+0x139/0x170 [ 32.243776] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.244334] do_vmi_munmap+0x1f1/0x2b0 [ 32.244818] __vm_munmap+0x138/0x3a0 [ 32.245286] __x64_sys_munmap+0x59/0x80 [ 32.245805] do_syscall_64+0x3f/0x90 [ 32.246284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.246924] [ 32.247139] The buggy address belongs to the object at ffff88800e530828 [ 32.247139] which belongs to the cache vm_area_struct of size 168 [ 32.248613] The buggy address is located 88 bytes inside of [ 32.248613] freed 168-byte region [ffff88800e530828, ffff88800e5308d0) [ 32.250017] [ 32.250233] The buggy address belongs to the physical page: [ 32.250894] page:000000004b685194 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe530 [ 32.251990] memcg:ffff88801466a501 [ 32.252416] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.253060] page_type: 0xffffffff() [ 32.253528] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.254447] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801466a501 [ 32.255358] page dumped because: kasan: bad access detected [ 32.256023] [ 32.256238] Memory state around the buggy address: [ 32.256823] ffff88800e530780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.257691] ffff88800e530800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.258549] >ffff88800e530880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.259407] ^ [ 32.259822] ffff88800e530900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.260677] ffff88800e530980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.261539] ================================================================== [ 32.262511] Disabling lock debugging due to kernel taint [ 34.986519] BUG: Bad rss-counter state mm:00000000f6075fd1 type:MM_FILEPAGES val:33 [ 34.987519] BUG: Bad rss-counter state mm:00000000f6075fd1 type:MM_ANONPAGES val:22 [ 35.479942] BUG: Bad rss-counter state mm:00000000197760e3 type:MM_FILEPAGES val:33 [ 35.480999] BUG: Bad rss-counter state mm:00000000197760e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51377' (ECDSA) to the list of known hosts. 2023/06/19 22:44:16 fuzzer started 2023/06/19 22:44:17 dialing manager at localhost:44161 2023/06/19 22:44:17 checking machine... 2023/06/19 22:44:17 checking revisions... [ 36.238893] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:44:17 testing simple program... [ 36.291529] cgroup: Unknown subsys name 'net' [ 36.338396] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:44:15 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f164cd1fc50 CR3=000000000da28000 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=2036313a34343a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a34343a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801ca78000 RBX=ffff88800ee29b40 RCX=ffff88801ca80000 RDX=ffff88801ca7f8f8 RSI=ffff88800ee29b40 RDI=ffff88801ca7f8a8 RBP=ffff88801ca7f8f8 RSP=ffff88801ca7f860 R8 =0000000000000006 R9 =0000000000000000 R10=ffff88801ca7f8f8 R11=00000000000b6996 R12=ffff88801ca7f8a8 R13=ffff88801ca7f920 R14=ffff88801ca7f940 R15=ffff88801ca7f8f8 RIP=ffffffff84508197 RFL=00000212 [----A--] 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 00007fd2d6035900 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=00007ffd400f5000 CR3=0000000019ee8000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000