syzkaller login: [ 42.594792] BUG: Bad rss-counter state mm:00000000955ba70d type:MM_FILEPAGES val:33 [ 42.595818] BUG: Bad rss-counter state mm:00000000955ba70d type:MM_ANONPAGES val:22 [ 42.765228] ================================================================== [ 42.766162] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.767105] Read of size 8 at addr ffff88800948a310 by task sshd/220 [ 42.767909] [ 42.768291] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.769235] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.770234] Call Trace: [ 42.770581] [ 42.770866] dump_stack_lvl+0x91/0xf0 [ 42.771384] print_report+0xcc/0x620 [ 42.771864] ? __virt_addr_valid+0x102/0x340 [ 42.772432] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.773064] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.773704] kasan_report+0xbe/0xf0 [ 42.774201] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.774832] vma_interval_tree_remove+0xc75/0xec0 [ 42.775465] vma_prepare+0xc54/0x11a0 [ 42.775952] __split_vma+0x5af/0x950 [ 42.776441] ? __pfx___split_vma+0x10/0x10 [ 42.776981] ? find_held_lock+0x2c/0x110 [ 42.777515] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.778090] ? lock_is_held_type+0x9f/0x120 [ 42.778637] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.779237] ? mtree_range_walk+0x632/0x900 [ 42.779827] ? mas_walk+0x5c7/0x7c0 [ 42.780324] do_vmi_munmap+0x1f1/0x2b0 [ 42.780832] mmap_region+0x1f9/0x2660 [ 42.781328] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.781844] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.782590] ? __pfx_lock_acquire+0x10/0x10 [ 42.783129] ? __pfx_mmap_region+0x10/0x10 [ 42.783693] ? security_mmap_addr+0x7d/0xa0 [ 42.784234] ? get_unmapped_area+0x1f5/0x3f0 [ 42.784793] do_mmap+0x854/0xf00 [ 42.785235] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.785744] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.786343] ksys_mmap_pgoff+0x3af/0x500 [ 42.786850] do_syscall_64+0x3f/0x90 [ 42.787350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.788010] RIP: 0033:0x7f39bb2dad82 [ 42.788480] 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 [ 42.790637] RSP: 002b:00007ffe81b960b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.791583] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f39bb2dad82 [ 42.792444] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f39ba714000 [ 42.793304] RBP: 00007f39ba714000 R08: 0000000000000009 R09: 0000000000001000 [ 42.794171] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556938655ec0 [ 42.795043] R13: 00007ffe81b960d0 R14: 00007ffe81b96100 R15: 00007ffe81b96460 [ 42.795923] [ 42.796214] [ 42.796461] Allocated by task 213: [ 42.796904] kasan_save_stack+0x22/0x50 [ 42.797454] kasan_set_track+0x25/0x30 [ 42.797951] __kasan_slab_alloc+0x59/0x70 [ 42.798504] kmem_cache_alloc+0x16b/0x370 [ 42.799022] vm_area_dup+0x20/0x160 [ 42.799498] __split_vma+0x170/0x950 [ 42.799963] split_vma+0xc6/0x110 [ 42.800431] mprotect_fixup+0x8d2/0xb30 [ 42.800928] do_mprotect_pkey+0x87e/0xd40 [ 42.801467] __x64_sys_mprotect+0x78/0xc0 [ 42.801990] do_syscall_64+0x3f/0x90 [ 42.802498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.803130] [ 42.803363] Freed by task 213: [ 42.803760] kasan_save_stack+0x22/0x50 [ 42.804264] kasan_set_track+0x25/0x30 [ 42.804786] kasan_save_free_info+0x2b/0x50 [ 42.805340] __kasan_slab_free+0x10a/0x190 [ 42.805876] kmem_cache_free+0x10d/0x4d0 [ 42.806425] rcu_core+0x8c8/0x2860 [ 42.806866] __do_softirq+0x1b7/0x7d4 [ 42.807368] [ 42.807586] Last potentially related work creation: [ 42.808172] kasan_save_stack+0x22/0x50 [ 42.808697] __kasan_record_aux_stack+0x8e/0xa0 [ 42.809278] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.810019] remove_vma+0x139/0x170 [ 42.810509] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.811068] do_vmi_munmap+0x1f1/0x2b0 [ 42.811590] __vm_munmap+0x138/0x3a0 [ 42.812068] __x64_sys_munmap+0x59/0x80 [ 42.812592] do_syscall_64+0x3f/0x90 [ 42.813140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.814014] [ 42.814318] Second to last potentially related work creation: [ 42.815266] kasan_save_stack+0x22/0x50 [ 42.815949] __kasan_record_aux_stack+0x8e/0xa0 [ 42.816740] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.817620] remove_vma+0x139/0x170 [ 42.818248] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.818847] do_vmi_munmap+0x1f1/0x2b0 [ 42.819365] mmap_region+0x1f9/0x2660 [ 42.819839] do_mmap+0x854/0xf00 [ 42.820284] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.820774] ksys_mmap_pgoff+0x3af/0x500 [ 42.821293] do_syscall_64+0x3f/0x90 [ 42.821771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.822472] [ 42.822687] The buggy address belongs to the object at ffff88800948a2b8 [ 42.822687] which belongs to the cache vm_area_struct of size 168 [ 42.824164] The buggy address is located 88 bytes inside of [ 42.824164] freed 168-byte region [ffff88800948a2b8, ffff88800948a360) [ 42.825596] [ 42.825812] The buggy address belongs to the physical page: [ 42.826516] page:0000000016db4714 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x948a [ 42.827615] memcg:ffff88800948b001 [ 42.828041] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.828754] page_type: 0xffffffff() [ 42.829209] raw: 0100000000000200 ffff88800879fc80 ffffea0000409280 dead000000000003 [ 42.830137] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800948b001 [ 42.831074] page dumped because: kasan: bad access detected [ 42.831750] [ 42.831970] Memory state around the buggy address: [ 42.832571] ffff88800948a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 42.833436] ffff88800948a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 42.834335] >ffff88800948a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 42.835186] ^ [ 42.835661] ffff88800948a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.836535] ffff88800948a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 42.837409] ================================================================== [ 42.838738] Disabling lock debugging due to kernel taint [ 45.105159] BUG: Bad rss-counter state mm:0000000092b16752 type:MM_FILEPAGES val:33 [ 45.106178] BUG: Bad rss-counter state mm:0000000092b16752 type:MM_ANONPAGES val:22 [ 45.601376] BUG: Bad rss-counter state mm:00000000fc02fb22 type:MM_FILEPAGES val:33 [ 45.602679] BUG: Bad rss-counter state mm:00000000fc02fb22 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4373' (ECDSA) to the list of known hosts. 2023/06/19 22:41:10 fuzzer started 2023/06/19 22:41:10 dialing manager at localhost:44161 2023/06/19 22:41:10 checking machine... 2023/06/19 22:41:10 checking revisions... [ 46.383229] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:41:10 testing simple program... [ 46.433883] cgroup: Unknown subsys name 'net' [ 46.502567] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:41:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=0000000000000003 RSI=ffffffff82244a69 RDI=ffffffff852c5908 RBP=dffffc0000000000 RSP=ffff88800d06fcd0 R8 =0000000000000005 R9 =000000000000003f R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=0000000000000003 R14=0000607f92e12a00 R15=ffffe8ffffd12a00 RIP=ffffffff82244ab9 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 00007f85ff554900 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=00007ffdbf140778 CR3=000000000ed68000 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=00007ff7ca57f510000055749c878790 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=0000000080000000 RBX=0000000000000073 RCX=0000000000000000 RDX=ffff8880103eb680 RSI=ffffffff818a35ab RDI=0000000000000001 RBP=0000000734b28d81 RSP=ffff8880103875b8 R8 =0000000000000001 R9 =000000000000002f R10=0000000000000073 R11=0000000000000001 R12=ffff88801038778c R13=eee88cadefc2844e R14=ffff888010387750 R15=ffff8880143d5535 RIP=ffffffff814c0800 RFL=00000246 [---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 00007facab304900 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=00007facaa78c170 CR3=000000000d8f6000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=08561afc23820e9300000000000ae988 XMM05=f2f9f16d8f3a72320000000000136740 XMM06=4fda316b135da52b00000000001351c0 XMM07=fb795ef6d657705600000000001246b8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000