[ 23.711873] BUG: Bad rss-counter state mm:00000000f31597cd type:MM_FILEPAGES val:33 [ 23.713080] BUG: Bad rss-counter state mm:00000000f31597cd type:MM_ANONPAGES val:22 [ 23.855715] ================================================================== [ 23.856620] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.857583] Read of size 8 at addr ffff8880159cb4e0 by task sshd/219 [ 23.858344] [ 23.858565] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.859609] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.860594] Call Trace: [ 23.860936] [ 23.861250] dump_stack_lvl+0x91/0xf0 [ 23.861753] print_report+0xcc/0x620 [ 23.862250] ? __virt_addr_valid+0x102/0x340 [ 23.862802] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.863420] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.864048] kasan_report+0xbe/0xf0 [ 23.864532] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.865158] vma_interval_tree_remove+0xc75/0xec0 [ 23.865767] vma_prepare+0xc54/0x11a0 [ 23.866243] __split_vma+0x5af/0x950 [ 23.866717] ? __pfx___split_vma+0x10/0x10 [ 23.867251] ? find_held_lock+0x2c/0x110 [ 23.867774] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.868345] ? lock_is_held_type+0x9f/0x120 [ 23.868909] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.869519] ? mtree_range_walk+0x632/0x900 [ 23.870078] ? mas_walk+0x5c7/0x7c0 [ 23.870566] do_vmi_munmap+0x1f1/0x2b0 [ 23.871060] mmap_region+0x1f9/0x2660 [ 23.871551] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.872073] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.872796] ? __pfx_lock_acquire+0x10/0x10 [ 23.873331] ? __pfx_mmap_region+0x10/0x10 [ 23.873863] ? security_mmap_addr+0x7d/0xa0 [ 23.874391] ? get_unmapped_area+0x1f5/0x3f0 [ 23.874945] do_mmap+0x854/0xf00 [ 23.875385] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.875887] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.876449] ksys_mmap_pgoff+0x3af/0x500 [ 23.876966] do_syscall_64+0x3f/0x90 [ 23.877445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.878097] RIP: 0033:0x7faf39b7bd82 [ 23.878556] 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 [ 23.880693] RSP: 002b:00007ffff2ac6c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.881619] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faf39b7bd82 [ 23.882460] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faf38fb5000 [ 23.883306] RBP: 00007faf38fb5000 R08: 0000000000000009 R09: 0000000000001000 [ 23.884152] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e6049ff70 [ 23.885000] R13: 00007ffff2ac6c60 R14: 00007ffff2ac6c90 R15: 00007ffff2ac6ff0 [ 23.885847] [ 23.886140] [ 23.886352] Allocated by task 212: [ 23.886780] kasan_save_stack+0x22/0x50 [ 23.887290] kasan_set_track+0x25/0x30 [ 23.887789] __kasan_slab_alloc+0x59/0x70 [ 23.888310] kmem_cache_alloc+0x16b/0x370 [ 23.888843] vm_area_dup+0x20/0x160 [ 23.889297] __split_vma+0x170/0x950 [ 23.889765] split_vma+0xc6/0x110 [ 23.890204] mprotect_fixup+0x8d2/0xb30 [ 23.890705] do_mprotect_pkey+0x87e/0xd40 [ 23.891223] __x64_sys_mprotect+0x78/0xc0 [ 23.891741] do_syscall_64+0x3f/0x90 [ 23.892222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.892895] [ 23.893111] Freed by task 19: [ 23.893497] kasan_save_stack+0x22/0x50 [ 23.893999] kasan_set_track+0x25/0x30 [ 23.894490] kasan_save_free_info+0x2b/0x50 [ 23.895023] __kasan_slab_free+0x10a/0x190 [ 23.895551] kmem_cache_free+0x10d/0x4d0 [ 23.896056] rcu_core+0x8c8/0x2860 [ 23.896507] __do_softirq+0x1b7/0x7d4 [ 23.896994] [ 23.897212] Last potentially related work creation: [ 23.897794] kasan_save_stack+0x22/0x50 [ 23.898304] __kasan_record_aux_stack+0x8e/0xa0 [ 23.898876] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.899519] remove_vma+0x139/0x170 [ 23.900028] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.900605] do_vmi_munmap+0x1f1/0x2b0 [ 23.901107] __vm_munmap+0x138/0x3a0 [ 23.901573] __x64_sys_munmap+0x59/0x80 [ 23.902067] do_syscall_64+0x3f/0x90 [ 23.902547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.903191] [ 23.903406] The buggy address belongs to the object at ffff8880159cb488 [ 23.903406] which belongs to the cache vm_area_struct of size 168 [ 23.904881] The buggy address is located 88 bytes inside of [ 23.904881] freed 168-byte region [ffff8880159cb488, ffff8880159cb530) [ 23.906276] [ 23.906497] The buggy address belongs to the physical page: [ 23.907190] page:00000000dbf78b0f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159cb [ 23.908301] memcg:ffff88800f2f8401 [ 23.908739] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.909390] page_type: 0xffffffff() [ 23.909842] raw: 0100000000000200 ffff8880087a0c80 ffffea0000574240 0000000000000002 [ 23.910767] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2f8401 [ 23.911691] page dumped because: kasan: bad access detected [ 23.912353] [ 23.912571] Memory state around the buggy address: [ 23.913167] ffff8880159cb380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.914039] ffff8880159cb400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.914904] >ffff8880159cb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.915757] ^ [ 23.916505] ffff8880159cb500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 23.917378] ffff8880159cb580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.918221] ================================================================== [ 23.919173] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.900509] BUG: Bad rss-counter state mm:00000000446df00c type:MM_FILEPAGES val:33 [ 25.901544] BUG: Bad rss-counter state mm:00000000446df00c type:MM_ANONPAGES val:22 [ 26.376149] BUG: Bad rss-counter state mm:00000000ba86920c type:MM_FILEPAGES val:33 [ 26.377783] BUG: Bad rss-counter state mm:00000000ba86920c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17562' (ECDSA) to the list of known hosts. 2023/06/20 16:40:32 fuzzer started 2023/06/20 16:40:33 dialing manager at localhost:36067 2023/06/20 16:40:33 checking machine... 2023/06/20 16:40:33 checking revisions... [ 27.113463] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:40:33 testing simple program... [ 27.161251] cgroup: Unknown subsys name 'net' [ 27.218693] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:40:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86098092 RDX=1ffff1100d9c135f RSI=1ffff1100d9c135e RDI=1ffff1100d9c135e RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =ffffffff86098096 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09a98 R15=ffff88806ce09a98 RIP=ffffffff811310ce 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 0000000000000000 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=00007f45822b89c0 CR3=000000000da9e000 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=2032333a30343a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a30343a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff85830480 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000001 RDI=ffff88800f2daf84 RBP=0000000000000001 RSP=ffff88800fbefc50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88800f2d9b40 R14=ffff88800fbefe10 R15=00007ffcc3d6e03c RIP=ffffffff8224481c 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 00007f9ea6851900 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=00007ffcc3d6f000 CR3=000000000cf00000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000