syzkaller login: [ 32.267493] BUG: Bad rss-counter state mm:000000006f5a567c type:MM_FILEPAGES val:33 [ 32.268684] BUG: Bad rss-counter state mm:000000006f5a567c type:MM_ANONPAGES val:22 [ 32.312735] ================================================================== [ 32.313697] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.314714] Read of size 8 at addr ffff888019ce6798 by task sshd/220 [ 32.315534] [ 32.315768] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.316683] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.317723] Call Trace: [ 32.318084] [ 32.318388] dump_stack_lvl+0x91/0xf0 [ 32.318915] print_report+0xcc/0x620 [ 32.319435] ? __virt_addr_valid+0x102/0x340 [ 32.320030] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.320697] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.321363] kasan_report+0xbe/0xf0 [ 32.321890] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.322569] vma_interval_tree_remove+0xc75/0xec0 [ 32.323219] vma_prepare+0xc54/0x11a0 [ 32.323735] __split_vma+0x5af/0x950 [ 32.324251] ? __pfx___split_vma+0x10/0x10 [ 32.324824] ? find_held_lock+0x2c/0x110 [ 32.325394] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.326019] ? lock_is_held_type+0x9f/0x120 [ 32.326610] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.327267] ? mtree_range_walk+0x632/0x900 [ 32.327866] ? mas_walk+0x5c7/0x7c0 [ 32.328379] do_vmi_munmap+0x1f1/0x2b0 [ 32.328910] mmap_region+0x1f9/0x2660 [ 32.329441] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.330024] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.330802] ? __pfx_lock_acquire+0x10/0x10 [ 32.331383] ? __pfx_mmap_region+0x10/0x10 [ 32.331964] ? security_mmap_addr+0x7d/0xa0 [ 32.332541] ? get_unmapped_area+0x1f5/0x3f0 [ 32.333136] do_mmap+0x854/0xf00 [ 32.333614] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.334159] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.334764] ksys_mmap_pgoff+0x3af/0x500 [ 32.335316] do_syscall_64+0x3f/0x90 [ 32.335837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.336538] RIP: 0033:0x7f1bc9c48d82 [ 32.337032] 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 [ 32.339522] RSP: 002b:00007fffe63eb178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.340567] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1bc9c48d82 [ 32.341486] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1bc9082000 [ 32.342410] RBP: 00007f1bc9082000 R08: 0000000000000009 R09: 0000000000001000 [ 32.343324] R10: 0000000000000812 R11: 0000000000000206 R12: 000056356218e980 [ 32.344218] R13: 00007fffe63eb190 R14: 00007fffe63eb1c0 R15: 00007fffe63eb520 [ 32.345115] [ 32.345424] [ 32.345651] Allocated by task 213: [ 32.346110] kasan_save_stack+0x22/0x50 [ 32.346654] kasan_set_track+0x25/0x30 [ 32.347183] __kasan_slab_alloc+0x59/0x70 [ 32.347744] kmem_cache_alloc+0x16b/0x370 [ 32.348289] vm_area_dup+0x20/0x160 [ 32.348770] __split_vma+0x170/0x950 [ 32.349267] split_vma+0xc6/0x110 [ 32.349734] mprotect_fixup+0x8d2/0xb30 [ 32.350284] do_mprotect_pkey+0x87e/0xd40 [ 32.350852] __x64_sys_mprotect+0x78/0xc0 [ 32.351418] do_syscall_64+0x3f/0x90 [ 32.351937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.352612] [ 32.352841] Freed by task 213: [ 32.353258] kasan_save_stack+0x22/0x50 [ 32.353787] kasan_set_track+0x25/0x30 [ 32.354317] kasan_save_free_info+0x2b/0x50 [ 32.354889] __kasan_slab_free+0x10a/0x190 [ 32.355464] kmem_cache_free+0x10d/0x4d0 [ 32.356006] rcu_core+0x8c8/0x2860 [ 32.356478] __do_softirq+0x1b7/0x7d4 [ 32.356983] [ 32.357214] Last potentially related work creation: [ 32.357837] kasan_save_stack+0x22/0x50 [ 32.358402] __kasan_record_aux_stack+0x8e/0xa0 [ 32.359016] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.359705] remove_vma+0x139/0x170 [ 32.360191] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.360788] do_vmi_munmap+0x1f1/0x2b0 [ 32.361308] __vm_munmap+0x138/0x3a0 [ 32.361804] __x64_sys_munmap+0x59/0x80 [ 32.362339] do_syscall_64+0x3f/0x90 [ 32.362841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.363529] [ 32.363759] The buggy address belongs to the object at ffff888019ce6740 [ 32.363759] which belongs to the cache vm_area_struct of size 168 [ 32.365341] The buggy address is located 88 bytes inside of [ 32.365341] freed 168-byte region [ffff888019ce6740, ffff888019ce67e8) [ 32.366844] [ 32.367074] The buggy address belongs to the physical page: [ 32.367780] page:00000000d33d6000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ce6 [ 32.368946] memcg:ffff8880174e2b01 [ 32.369403] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.370109] page_type: 0xffffffff() [ 32.370594] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.371572] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880174e2b01 [ 32.372534] page dumped because: kasan: bad access detected [ 32.373243] [ 32.373473] Memory state around the buggy address: [ 32.374106] ffff888019ce6680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.375016] ffff888019ce6700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.375936] >ffff888019ce6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.376847] ^ [ 32.377384] ffff888019ce6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.378310] ffff888019ce6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.379208] ================================================================== [ 32.380351] Disabling lock debugging due to kernel taint [ 34.354267] BUG: Bad rss-counter state mm:000000006c469c9f type:MM_FILEPAGES val:33 [ 34.355380] BUG: Bad rss-counter state mm:000000006c469c9f type:MM_ANONPAGES val:22 [ 34.805341] BUG: Bad rss-counter state mm:000000004482f6d6 type:MM_FILEPAGES val:33 [ 34.806759] BUG: Bad rss-counter state mm:000000004482f6d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28745' (ECDSA) to the list of known hosts. 2023/06/20 08:46:09 fuzzer started 2023/06/20 08:46:09 dialing manager at localhost:44161 2023/06/20 08:46:09 checking machine... 2023/06/20 08:46:09 checking revisions... [ 35.543206] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:46:09 testing simple program... [ 35.602786] cgroup: Unknown subsys name 'net' [ 35.661305] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:46:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11000d02f24 RSI=ffffffff81370a3a RDI=ffff8880068178c8 RBP=ffff888006817920 RSP=ffff888006817858 R8 =0000000000000001 R9 =ffff888006817908 R10=0000000000038001 R11=0000000000020ed0 R12=ffff888006817990 R13=0000000000000000 R14=ffff88801584d1c0 R15=ffff8880068178c8 RIP=ffffffff8113062c 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 00007f972c1aa900 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=00007fff1eb95000 CR3=000000000d12e000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f74dc943d00 CR3=000000000da16000 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=2038303a36343a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a36343a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000