syzkaller login: [ 30.072794] BUG: Bad rss-counter state mm:0000000063ec34d0 type:MM_FILEPAGES val:33 [ 30.074648] BUG: Bad rss-counter state mm:0000000063ec34d0 type:MM_ANONPAGES val:22 [ 30.241157] ================================================================== [ 30.242265] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.243511] Read of size 8 at addr ffff888018096058 by task sshd/220 [ 30.244465] [ 30.244728] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.245778] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.246790] Call Trace: [ 30.247109] [ 30.247401] dump_stack_lvl+0x91/0xf0 [ 30.247891] print_report+0xcc/0x620 [ 30.248388] ? __virt_addr_valid+0x102/0x340 [ 30.248946] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.249563] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.250188] kasan_report+0xbe/0xf0 [ 30.250661] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.251312] vma_interval_tree_remove+0xc75/0xec0 [ 30.251924] vma_prepare+0xc54/0x11a0 [ 30.252401] __split_vma+0x5af/0x950 [ 30.252872] ? __pfx___split_vma+0x10/0x10 [ 30.253403] ? find_held_lock+0x2c/0x110 [ 30.253925] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.254499] ? lock_is_held_type+0x9f/0x120 [ 30.255038] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.255676] ? mtree_range_walk+0x632/0x900 [ 30.256228] ? mas_walk+0x5c7/0x7c0 [ 30.256730] do_vmi_munmap+0x1f1/0x2b0 [ 30.257228] mmap_region+0x1f9/0x2660 [ 30.257709] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 30.258357] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 30.259020] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 30.259703] ? __pfx_mmap_region+0x10/0x10 [ 30.260237] ? __sanitizer_cov_trace_switch+0x16/0x90 [ 30.260882] do_mmap+0x854/0xf00 [ 30.261327] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.261827] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.262389] ksys_mmap_pgoff+0x3af/0x500 [ 30.262896] do_syscall_64+0x3f/0x90 [ 30.263391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.264049] RIP: 0033:0x7f83ca787d82 [ 30.264511] 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 [ 30.266659] RSP: 002b:00007ffc81ca32c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.267579] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f83ca787d82 [ 30.268425] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f83c9bc1000 [ 30.269284] RBP: 00007f83c9bc1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.270144] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c3da6baec0 [ 30.271001] R13: 00007ffc81ca32e0 R14: 00007ffc81ca3310 R15: 00007ffc81ca3670 [ 30.271875] [ 30.272172] [ 30.272386] Allocated by task 213: [ 30.272826] kasan_save_stack+0x22/0x50 [ 30.273330] kasan_set_track+0x25/0x30 [ 30.273818] __kasan_slab_alloc+0x59/0x70 [ 30.274344] kmem_cache_alloc+0x16b/0x370 [ 30.274857] vm_area_dup+0x20/0x160 [ 30.275331] __split_vma+0x170/0x950 [ 30.275804] split_vma+0xc6/0x110 [ 30.276243] mprotect_fixup+0x8d2/0xb30 [ 30.276744] do_mprotect_pkey+0x87e/0xd40 [ 30.277263] __x64_sys_mprotect+0x78/0xc0 [ 30.277791] do_syscall_64+0x3f/0x90 [ 30.278291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.278937] [ 30.279165] Freed by task 213: [ 30.279564] kasan_save_stack+0x22/0x50 [ 30.280075] kasan_set_track+0x25/0x30 [ 30.280574] kasan_save_free_info+0x2b/0x50 [ 30.281113] __kasan_slab_free+0x10a/0x190 [ 30.281643] kmem_cache_free+0x10d/0x4d0 [ 30.282157] rcu_core+0x8c8/0x2860 [ 30.282599] __do_softirq+0x1b7/0x7d4 [ 30.283081] [ 30.283315] Last potentially related work creation: [ 30.283903] kasan_save_stack+0x22/0x50 [ 30.284493] __kasan_record_aux_stack+0x8e/0xa0 [ 30.285075] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.285721] remove_vma+0x139/0x170 [ 30.286173] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.286731] do_vmi_munmap+0x1f1/0x2b0 [ 30.287234] __vm_munmap+0x138/0x3a0 [ 30.287704] __x64_sys_munmap+0x59/0x80 [ 30.288198] do_syscall_64+0x3f/0x90 [ 30.288674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.289325] [ 30.289542] The buggy address belongs to the object at ffff888018096000 [ 30.289542] which belongs to the cache vm_area_struct of size 168 [ 30.291015] The buggy address is located 88 bytes inside of [ 30.291015] freed 168-byte region [ffff888018096000, ffff8880180960a8) [ 30.292436] [ 30.292651] The buggy address belongs to the physical page: [ 30.293312] page:00000000be8480fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18096 [ 30.294408] memcg:ffff888016fb9301 [ 30.294837] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.295499] page_type: 0xffffffff() [ 30.295956] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.296877] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016fb9301 [ 30.297793] page dumped because: kasan: bad access detected [ 30.298456] [ 30.298670] Memory state around the buggy address: [ 30.299258] ffff888018095f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.300114] ffff888018095f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.300976] >ffff888018096000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.301826] ^ [ 30.302564] ffff888018096080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.303450] ffff888018096100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.304301] ================================================================== [ 30.305320] Disabling lock debugging due to kernel taint [ 32.608736] BUG: Bad rss-counter state mm:0000000076b0d0fc type:MM_FILEPAGES val:33 [ 32.609753] BUG: Bad rss-counter state mm:0000000076b0d0fc type:MM_ANONPAGES val:22 [ 33.179842] BUG: Bad rss-counter state mm:0000000045f02bc3 type:MM_FILEPAGES val:33 [ 33.180790] BUG: Bad rss-counter state mm:0000000045f02bc3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46896' (ECDSA) to the list of known hosts. 2023/06/20 21:49:43 fuzzer started 2023/06/20 21:49:43 dialing manager at localhost:36067 2023/06/20 21:49:43 checking machine... 2023/06/20 21:49:43 checking revisions... [ 33.836062] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:49:43 testing simple program... [ 33.892759] cgroup: Unknown subsys name 'net' [ 33.939389] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:49:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000452 RCX=0000000000000060 RDX=00007ffd002971d0 RSI=0000000000000452 RDI=00007ffd00297280 RBP=00007ffd002971d0 RSP=00007ffd002970b8 R8 =00000000ffffffff R9 =00007ffd00296f60 R10=00007fb12f241a57 R11=0000000000000000 R12=00007ffd002971d0 R13=0000000000000008 R14=0000000000000000 R15=0000000000000000 RIP=00007fb12ec44b8e RFL=00000202 [-------] 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 00007fb12e6f1900 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=00007fb12eca8618 CR3=000000001615c000 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=313d7264646120322e322e302e30313d XMM02=737365636375733d736572206873733d XMM03=61fb1463981aa36d7c27f1a250a9e6a5 XMM04=6962732f7273752f223d657865202274 XMM05=00000000000000000000000000000000 XMM06=695f6d2f702c752f223d65616520226e XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=00007fb3980e3030 CR3=000000000cad0000 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=2032343a39343a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a39343a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000