syzkaller login: [ 30.572100] BUG: Bad rss-counter state mm:00000000b47c020e type:MM_FILEPAGES val:33 [ 30.573393] BUG: Bad rss-counter state mm:00000000b47c020e type:MM_ANONPAGES val:22 [ 30.725210] ================================================================== [ 30.726322] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.727294] Read of size 8 at addr ffff88800c5143f8 by task sshd/221 [ 30.728186] [ 30.728410] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.729296] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.730308] Call Trace: [ 30.730636] [ 30.730925] dump_stack_lvl+0x91/0xf0 [ 30.731427] print_report+0xcc/0x620 [ 30.731923] ? __virt_addr_valid+0x102/0x340 [ 30.732478] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.733102] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.733722] kasan_report+0xbe/0xf0 [ 30.734219] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.734842] vma_interval_tree_remove+0xc75/0xec0 [ 30.735453] vma_prepare+0xc54/0x11a0 [ 30.735934] __split_vma+0x5af/0x950 [ 30.736417] ? __pfx___split_vma+0x10/0x10 [ 30.736962] ? find_held_lock+0x2c/0x110 [ 30.737488] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.738054] ? lock_is_held_type+0x9f/0x120 [ 30.738628] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.739248] ? mtree_range_walk+0x632/0x900 [ 30.739817] ? mas_walk+0x5c7/0x7c0 [ 30.740296] do_vmi_munmap+0x1f1/0x2b0 [ 30.740803] mmap_region+0x1f9/0x2660 [ 30.741298] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.741810] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.742538] ? __pfx_lock_acquire+0x10/0x10 [ 30.743076] ? __pfx_mmap_region+0x10/0x10 [ 30.743606] ? security_mmap_addr+0x7d/0xa0 [ 30.744138] ? get_unmapped_area+0x1f5/0x3f0 [ 30.744688] do_mmap+0x854/0xf00 [ 30.745131] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.745630] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.746206] ksys_mmap_pgoff+0x3af/0x500 [ 30.746717] do_syscall_64+0x3f/0x90 [ 30.747202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.747850] RIP: 0033:0x7f4f5659fd82 [ 30.748310] 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 [ 30.750463] RSP: 002b:00007fffbc7d2aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.751370] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f5659fd82 [ 30.752238] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f559d9000 [ 30.753091] RBP: 00007f4f559d9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.753952] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d243b62f70 [ 30.754810] R13: 00007fffbc7d2ac0 R14: 00007fffbc7d2af0 R15: 00007fffbc7d2e50 [ 30.755675] [ 30.755970] [ 30.756189] Allocated by task 214: [ 30.756613] kasan_save_stack+0x22/0x50 [ 30.757124] kasan_set_track+0x25/0x30 [ 30.757626] __kasan_slab_alloc+0x59/0x70 [ 30.758163] kmem_cache_alloc+0x16b/0x370 [ 30.758697] vm_area_dup+0x20/0x160 [ 30.759159] __split_vma+0x170/0x950 [ 30.759644] split_vma+0xc6/0x110 [ 30.760090] mprotect_fixup+0x8d2/0xb30 [ 30.760593] do_mprotect_pkey+0x87e/0xd40 [ 30.761115] __x64_sys_mprotect+0x78/0xc0 [ 30.761644] do_syscall_64+0x3f/0x90 [ 30.762126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.762788] [ 30.763002] Freed by task 214: [ 30.763397] kasan_save_stack+0x22/0x50 [ 30.763911] kasan_set_track+0x25/0x30 [ 30.764408] kasan_save_free_info+0x2b/0x50 [ 30.764952] __kasan_slab_free+0x10a/0x190 [ 30.765491] kmem_cache_free+0x10d/0x4d0 [ 30.766005] rcu_core+0x8c8/0x2860 [ 30.766459] __do_softirq+0x1b7/0x7d4 [ 30.766941] [ 30.767158] Last potentially related work creation: [ 30.767752] kasan_save_stack+0x22/0x50 [ 30.768257] __kasan_record_aux_stack+0x8e/0xa0 [ 30.768837] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.769484] remove_vma+0x139/0x170 [ 30.769941] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.770522] do_vmi_munmap+0x1f1/0x2b0 [ 30.771015] __vm_munmap+0x138/0x3a0 [ 30.771487] __x64_sys_munmap+0x59/0x80 [ 30.771984] do_syscall_64+0x3f/0x90 [ 30.772469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.773110] [ 30.773324] The buggy address belongs to the object at ffff88800c5143a0 [ 30.773324] which belongs to the cache vm_area_struct of size 168 [ 30.774796] The buggy address is located 88 bytes inside of [ 30.774796] freed 168-byte region [ffff88800c5143a0, ffff88800c514448) [ 30.776201] [ 30.776420] The buggy address belongs to the physical page: [ 30.777081] page:000000005263465b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc514 [ 30.778163] memcg:ffff888016635b01 [ 30.778611] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.779255] page_type: 0xffffffff() [ 30.779719] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.780651] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016635b01 [ 30.781570] page dumped because: kasan: bad access detected [ 30.782254] [ 30.782472] Memory state around the buggy address: [ 30.783065] ffff88800c514280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.783946] ffff88800c514300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.784832] >ffff88800c514380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.785700] ^ [ 30.786598] ffff88800c514400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.787475] ffff88800c514480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.788353] ================================================================== [ 30.789347] Disabling lock debugging due to kernel taint [ 32.551448] BUG: Bad rss-counter state mm:0000000063767f7d type:MM_FILEPAGES val:33 [ 32.552253] BUG: Bad rss-counter state mm:0000000063767f7d type:MM_ANONPAGES val:22 [ 32.997116] BUG: Bad rss-counter state mm:000000000c8e9b29 type:MM_FILEPAGES val:33 [ 32.998317] BUG: Bad rss-counter state mm:000000000c8e9b29 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32620' (ECDSA) to the list of known hosts. 2023/06/20 23:35:18 fuzzer started 2023/06/20 23:35:18 dialing manager at localhost:36067 2023/06/20 23:35:18 checking machine... 2023/06/20 23:35:18 checking revisions... [ 33.706245] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:35:18 testing simple program... [ 33.749719] cgroup: Unknown subsys name 'net' [ 33.785919] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:35:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f1cfe6210e0 RCX=0000000000000100 RDX=ffff888015da1b40 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f1cfe6210e0 RSP=ffff88801cdcf958 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f1cfe621000 R11=00000000000b6d7d R12=ffff88801cdcfa78 R13=0000000000000000 R14=ffff888015da1b40 R15=ffff88801aad6730 RIP=ffffffff811fc714 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1cfe1ac900 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=00007ffde6fcc000 CR3=000000001ab50000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f0996d0c000 CR3=000000000c696000 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=64d44d1ea16488b9c04b1e2940c183de XMM02=ec2efd57dc4c00df000000000011d850 XMM03=08c5d5b527c0c093000000000011d920 XMM04=a1d84e7a9549e75300000000000ae988 XMM05=e4cb8bb95a7664b60000000000131d38 XMM06=978b7773add891db0000000000130ba0 XMM07=e042d86d42eb936e00000000001221d0 XMM08=08c5d5b527c0c093000000000011d920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000