[ 61.265643] BUG: Bad rss-counter state mm:000000004a2fd7aa type:MM_FILEPAGES val:33 [ 61.266825] BUG: Bad rss-counter state mm:000000004a2fd7aa type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 61.422981] ================================================================== [ 61.423949] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.424933] Read of size 8 at addr ffff88801991fdf0 by task sshd/227 [ 61.425855] [ 61.426088] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.427006] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.428051] Call Trace: [ 61.428390] [ 61.428687] dump_stack_lvl+0x91/0xf0 [ 61.429230] print_report+0xcc/0x620 [ 61.429744] ? __virt_addr_valid+0x102/0x340 [ 61.430323] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.430973] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.431611] kasan_report+0xbe/0xf0 [ 61.432113] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.432765] vma_interval_tree_remove+0xc75/0xec0 [ 61.433422] vma_prepare+0xc54/0x11a0 [ 61.433932] __split_vma+0x5af/0x950 [ 61.434444] ? __pfx___split_vma+0x10/0x10 [ 61.435013] ? find_held_lock+0x2c/0x110 [ 61.435579] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.436176] ? lock_is_held_type+0x9f/0x120 [ 61.436747] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.437407] ? mtree_range_walk+0x632/0x900 [ 61.438012] ? mas_walk+0x5c7/0x7c0 [ 61.438529] do_vmi_munmap+0x1f1/0x2b0 [ 61.439054] mmap_region+0x1f9/0x2660 [ 61.439578] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.440126] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.440898] ? __pfx_lock_acquire+0x10/0x10 [ 61.441478] ? __pfx_mmap_region+0x10/0x10 [ 61.442039] ? security_mmap_addr+0x7d/0xa0 [ 61.442602] ? get_unmapped_area+0x1f5/0x3f0 [ 61.443186] do_mmap+0x854/0xf00 [ 61.443656] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.444183] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.444786] ksys_mmap_pgoff+0x3af/0x500 [ 61.445336] do_syscall_64+0x3f/0x90 [ 61.445846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.446531] RIP: 0033:0x7ffb46aa8d82 [ 61.447026] 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 [ 61.449316] RSP: 002b:00007ffca0d540e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.450264] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb46aa8d82 [ 61.451166] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb45ee2000 [ 61.452072] RBP: 00007ffb45ee2000 R08: 0000000000000009 R09: 0000000000001000 [ 61.452970] R10: 0000000000000812 R11: 0000000000000206 R12: 00005614a5e55ec0 [ 61.453872] R13: 00007ffca0d54100 R14: 00007ffca0d54130 R15: 00007ffca0d54490 [ 61.454777] [ 61.455089] [ 61.455313] Allocated by task 220: [ 61.455773] kasan_save_stack+0x22/0x50 [ 61.456300] kasan_set_track+0x25/0x30 [ 61.456827] __kasan_slab_alloc+0x59/0x70 [ 61.457391] kmem_cache_alloc+0x16b/0x370 [ 61.457937] vm_area_dup+0x20/0x160 [ 61.458413] __split_vma+0x170/0x950 [ 61.458913] split_vma+0xc6/0x110 [ 61.459393] mprotect_fixup+0x8d2/0xb30 [ 61.459931] do_mprotect_pkey+0x87e/0xd40 [ 61.460487] __x64_sys_mprotect+0x78/0xc0 [ 61.461046] do_syscall_64+0x3f/0x90 [ 61.461570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.462266] [ 61.462497] Freed by task 19: [ 61.462902] kasan_save_stack+0x22/0x50 [ 61.463434] kasan_set_track+0x25/0x30 [ 61.463954] kasan_save_free_info+0x2b/0x50 [ 61.464510] __kasan_slab_free+0x10a/0x190 [ 61.465097] kmem_cache_free+0x10d/0x4d0 [ 61.465639] rcu_core+0x8c8/0x2860 [ 61.466113] __do_softirq+0x1b7/0x7d4 [ 61.466622] [ 61.466852] Last potentially related work creation: [ 61.467468] kasan_save_stack+0x22/0x50 [ 61.468002] __kasan_record_aux_stack+0x8e/0xa0 [ 61.468609] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.469311] remove_vma+0x139/0x170 [ 61.469794] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.470393] do_vmi_munmap+0x1f1/0x2b0 [ 61.470917] __vm_munmap+0x138/0x3a0 [ 61.471407] __x64_sys_munmap+0x59/0x80 [ 61.471937] do_syscall_64+0x3f/0x90 [ 61.472443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.473145] [ 61.473374] The buggy address belongs to the object at ffff88801991fd98 [ 61.473374] which belongs to the cache vm_area_struct of size 168 [ 61.474933] The buggy address is located 88 bytes inside of [ 61.474933] freed 168-byte region [ffff88801991fd98, ffff88801991fe40) [ 61.476417] [ 61.476650] The buggy address belongs to the physical page: [ 61.477369] page:00000000d363dc7d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1991f [ 61.478524] memcg:ffff888019c61e01 [ 61.478990] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.479669] page_type: 0xffffffff() [ 61.480143] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.481125] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c61e01 [ 61.482093] page dumped because: kasan: bad access detected [ 61.482793] [ 61.483021] Memory state around the buggy address: [ 61.483650] ffff88801991fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 61.484564] ffff88801991fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 61.485505] >ffff88801991fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 61.486415] ^ [ 61.487282] ffff88801991fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 61.488196] ffff88801991fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.489134] ================================================================== [ 61.490158] Disabling lock debugging due to kernel taint [ 63.582127] BUG: Bad rss-counter state mm:00000000f2a21550 type:MM_FILEPAGES val:33 [ 63.582897] BUG: Bad rss-counter state mm:00000000f2a21550 type:MM_ANONPAGES val:22 [ 63.988351] BUG: Bad rss-counter state mm:0000000024c02e61 type:MM_FILEPAGES val:33 [ 63.989139] BUG: Bad rss-counter state mm:0000000024c02e61 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65117' (ECDSA) to the list of known hosts. 2023/06/21 01:16:34 fuzzer started 2023/06/21 01:16:35 dialing manager at localhost:36067 2023/06/21 01:16:35 checking machine... 2023/06/21 01:16:35 checking revisions... [ 64.751217] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:16:35 testing simple program... [ 64.800035] cgroup: Unknown subsys name 'net' [ 64.851081] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:16:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88801467f9a0 RDI=ffffffff81935bea RBP=ffff88806ce09af0 RSP=ffff88806ce09a80 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000002c9f6 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888014680000 R15=ffff88800daa7000 RIP=ffffffff811303b2 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 00007fc9e0660900 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=00007fc9dfa8ca00 CR3=000000000cb2c000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=777a9fd10a4bdbd000000000000ae988 XMM05=32deb7febdb92c2e0000000000131fc8 XMM06=c3bf4385c535b2f30000000000130d00 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86138e8c RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800e73f540 RSP=ffff88800e73f478 R8 =ffffffff86138e90 R9 =ffff88800e73f528 R10=0000000000038001 R11=0000000000020d8f R12=ffff88800e73f548 R13=ffff88800e73f530 R14=0000000000000005 R15=ffff88800e73f4e8 RIP=ffffffff81130b17 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 00007f0dc4911700 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=00007fea7ead231c CR3=0000000019dc2000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3633325b646873732034333a3631 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303035 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000