syzkaller login: [ 31.249857] BUG: Bad rss-counter state mm:000000004a704a2e type:MM_FILEPAGES val:33 [ 31.251655] BUG: Bad rss-counter state mm:000000004a704a2e type:MM_ANONPAGES val:22 [ 31.401198] ================================================================== [ 31.402330] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.403482] Read of size 8 at addr ffff88800fed5310 by task sshd/220 [ 31.404523] [ 31.404836] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.405892] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.407122] Call Trace: [ 31.407513] [ 31.407860] dump_stack_lvl+0x91/0xf0 [ 31.408380] print_report+0xcc/0x620 [ 31.408866] ? __virt_addr_valid+0x102/0x340 [ 31.409417] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.410037] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.410676] kasan_report+0xbe/0xf0 [ 31.411189] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.411840] vma_interval_tree_remove+0xc75/0xec0 [ 31.412467] vma_prepare+0xc54/0x11a0 [ 31.412954] __split_vma+0x5af/0x950 [ 31.413434] ? __pfx___split_vma+0x10/0x10 [ 31.413975] ? find_held_lock+0x2c/0x110 [ 31.414505] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.415117] ? lock_is_held_type+0x9f/0x120 [ 31.415689] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.416316] ? mtree_range_walk+0x632/0x900 [ 31.416893] ? mas_walk+0x5c7/0x7c0 [ 31.417379] do_vmi_munmap+0x1f1/0x2b0 [ 31.417873] mmap_region+0x1f9/0x2660 [ 31.418353] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.418867] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.419615] ? __pfx_lock_acquire+0x10/0x10 [ 31.420147] ? __pfx_mmap_region+0x10/0x10 [ 31.420676] ? security_mmap_addr+0x7d/0xa0 [ 31.421206] ? get_unmapped_area+0x1f5/0x3f0 [ 31.421755] do_mmap+0x854/0xf00 [ 31.422196] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.422695] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.423302] ksys_mmap_pgoff+0x3af/0x500 [ 31.423812] do_syscall_64+0x3f/0x90 [ 31.424294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.424957] RIP: 0033:0x7f52bdbf8d82 [ 31.425417] 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 [ 31.427640] RSP: 002b:00007ffe49addd58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.428566] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f52bdbf8d82 [ 31.429424] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f52bd032000 [ 31.430300] RBP: 00007f52bd032000 R08: 0000000000000009 R09: 0000000000001000 [ 31.431183] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562e020d3b20 [ 31.432080] R13: 00007ffe49addd70 R14: 00007ffe49addda0 R15: 00007ffe49ade100 [ 31.432941] [ 31.433231] [ 31.433445] Allocated by task 213: [ 31.433905] kasan_save_stack+0x22/0x50 [ 31.434413] kasan_set_track+0x25/0x30 [ 31.434917] __kasan_slab_alloc+0x59/0x70 [ 31.435489] kmem_cache_alloc+0x16b/0x370 [ 31.436005] vm_area_dup+0x20/0x160 [ 31.436460] __split_vma+0x170/0x950 [ 31.436935] split_vma+0xc6/0x110 [ 31.437379] mprotect_fixup+0x8d2/0xb30 [ 31.437890] do_mprotect_pkey+0x87e/0xd40 [ 31.438415] __x64_sys_mprotect+0x78/0xc0 [ 31.438933] do_syscall_64+0x3f/0x90 [ 31.439441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.440095] [ 31.440315] Freed by task 203: [ 31.440718] kasan_save_stack+0x22/0x50 [ 31.441224] kasan_set_track+0x25/0x30 [ 31.441719] kasan_save_free_info+0x2b/0x50 [ 31.442265] __kasan_slab_free+0x10a/0x190 [ 31.442801] kmem_cache_free+0x10d/0x4d0 [ 31.443354] rcu_core+0x8c8/0x2860 [ 31.443813] __do_softirq+0x1b7/0x7d4 [ 31.444303] [ 31.444525] Last potentially related work creation: [ 31.445118] kasan_save_stack+0x22/0x50 [ 31.445625] __kasan_record_aux_stack+0x8e/0xa0 [ 31.446260] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.446913] remove_vma+0x139/0x170 [ 31.447399] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.447970] do_vmi_munmap+0x1f1/0x2b0 [ 31.448469] __vm_munmap+0x138/0x3a0 [ 31.448955] __x64_sys_munmap+0x59/0x80 [ 31.449461] do_syscall_64+0x3f/0x90 [ 31.449939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.450600] [ 31.450822] The buggy address belongs to the object at ffff88800fed52b8 [ 31.450822] which belongs to the cache vm_area_struct of size 168 [ 31.452344] The buggy address is located 88 bytes inside of [ 31.452344] freed 168-byte region [ffff88800fed52b8, ffff88800fed5360) [ 31.453785] [ 31.454006] The buggy address belongs to the physical page: [ 31.454694] page:00000000fd30e1e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfed5 [ 31.455841] memcg:ffff888019234901 [ 31.456280] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.456946] page_type: 0xffffffff() [ 31.457405] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.458353] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019234901 [ 31.459312] page dumped because: kasan: bad access detected [ 31.459988] [ 31.460207] Memory state around the buggy address: [ 31.460809] ffff88800fed5200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.461671] ffff88800fed5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.462551] >ffff88800fed5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.463477] ^ [ 31.463953] ffff88800fed5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.464842] ffff88800fed5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.465768] ================================================================== [ 31.466891] Disabling lock debugging due to kernel taint [ 33.491065] BUG: Bad rss-counter state mm:0000000044a34572 type:MM_FILEPAGES val:33 [ 33.492483] BUG: Bad rss-counter state mm:0000000044a34572 type:MM_ANONPAGES val:22 [ 33.963290] BUG: Bad rss-counter state mm:0000000077245119 type:MM_FILEPAGES val:33 [ 33.964286] BUG: Bad rss-counter state mm:0000000077245119 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32346' (ECDSA) to the list of known hosts. 2023/06/20 18:43:50 fuzzer started 2023/06/20 18:43:50 dialing manager at localhost:36067 2023/06/20 18:43:50 checking machine... 2023/06/20 18:43:50 checking revisions... [ 34.627037] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:43:50 testing simple program... [ 34.689822] cgroup: Unknown subsys name 'net' [ 34.728816] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:43:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801002d1c0 RSI=ffffffff8140257f RDI=0000000000000007 RBP=0000000000000000 RSP=ffff88801a067bd0 R8 =0000000000000007 R9 =0000000000000000 R10=000055c90944ce90 R11=0000000000000000 R12=0000000000000e90 R13=0000000000000000 R14=00000000ffffffff R15=00000000ffffffff RIP=ffffffff81402586 RFL=00000293 [--S-A-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 00007eff46e40700 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=00007ffc261d23b8 CR3=000000000da50000 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=33343a3831203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343430 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f9301031650 CR3=000000000d6da000 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=00000000000000000000000000000000 XMM01=ead4ae39d41b4fbee447279bc82674b2 XMM02=2c67c8bc2e329bc300000000001192c8 XMM03=fb795ef6d65770560000000000120a20 XMM04=a57a2ee7e86c463e00000000000ae988 XMM05=19e9129bd510f2350000000000130848 XMM06=5d4b6566a0b00cb5000000000012ef48 XMM07=e042d86d42eb936e0000000000120ca0 XMM08=8de4d74e5c0b1f350000000000119328 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000