[ 34.633195] BUG: Bad rss-counter state mm:00000000ba8586c1 type:MM_FILEPAGES val:33 [ 34.634383] BUG: Bad rss-counter state mm:00000000ba8586c1 type:MM_ANONPAGES val:22 [ 34.776296] ================================================================== [ 34.777220] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.778164] Read of size 8 at addr ffff88800df94798 by task sshd/219 [ 34.778937] [ 34.779151] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.780201] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.781218] Call Trace: [ 34.781547] [ 34.781849] dump_stack_lvl+0x91/0xf0 [ 34.782349] print_report+0xcc/0x620 [ 34.782837] ? __virt_addr_valid+0x102/0x340 [ 34.783397] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.784038] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.784657] kasan_report+0xbe/0xf0 [ 34.785163] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.785802] vma_interval_tree_remove+0xc75/0xec0 [ 34.786408] vma_prepare+0xc54/0x11a0 [ 34.786891] __split_vma+0x5af/0x950 [ 34.787363] ? __pfx___split_vma+0x10/0x10 [ 34.787894] ? find_held_lock+0x2c/0x110 [ 34.788419] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.788995] ? lock_is_held_type+0x9f/0x120 [ 34.789552] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.790168] ? mtree_range_walk+0x632/0x900 [ 34.790718] ? mas_walk+0x5c7/0x7c0 [ 34.791197] do_vmi_munmap+0x1f1/0x2b0 [ 34.791693] mmap_region+0x1f9/0x2660 [ 34.792208] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.792762] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.793489] ? __pfx_lock_acquire+0x10/0x10 [ 34.794044] ? __pfx_mmap_region+0x10/0x10 [ 34.794578] ? security_mmap_addr+0x7d/0xa0 [ 34.795111] ? get_unmapped_area+0x1f5/0x3f0 [ 34.795658] do_mmap+0x854/0xf00 [ 34.796098] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.796592] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.797167] ksys_mmap_pgoff+0x3af/0x500 [ 34.797685] do_syscall_64+0x3f/0x90 [ 34.798174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.798832] RIP: 0033:0x7f76033aad82 [ 34.799293] 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 [ 34.801429] RSP: 002b:00007ffcad3bc5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.802357] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76033aad82 [ 34.803211] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76027e4000 [ 34.804061] RBP: 00007f76027e4000 R08: 0000000000000009 R09: 0000000000001000 [ 34.804926] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a980b9f70 [ 34.805778] R13: 00007ffcad3bc610 R14: 00007ffcad3bc640 R15: 00007ffcad3bc9a0 [ 34.806652] [ 34.806947] [ 34.807166] Allocated by task 208: [ 34.807597] kasan_save_stack+0x22/0x50 [ 34.808105] kasan_set_track+0x25/0x30 [ 34.808600] __kasan_slab_alloc+0x59/0x70 [ 34.809139] kmem_cache_alloc+0x16b/0x370 [ 34.809655] vm_area_dup+0x20/0x160 [ 34.810114] __split_vma+0x170/0x950 [ 34.810592] split_vma+0xc6/0x110 [ 34.811037] mprotect_fixup+0x8d2/0xb30 [ 34.811541] do_mprotect_pkey+0x87e/0xd40 [ 34.812067] __x64_sys_mprotect+0x78/0xc0 [ 34.812582] do_syscall_64+0x3f/0x90 [ 34.813064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.813707] [ 34.813926] Freed by task 208: [ 34.814319] kasan_save_stack+0x22/0x50 [ 34.814825] kasan_set_track+0x25/0x30 [ 34.815325] kasan_save_free_info+0x2b/0x50 [ 34.815860] __kasan_slab_free+0x10a/0x190 [ 34.816390] kmem_cache_free+0x10d/0x4d0 [ 34.816915] rcu_core+0x8c8/0x2860 [ 34.817360] __do_softirq+0x1b7/0x7d4 [ 34.817833] [ 34.818051] Last potentially related work creation: [ 34.818648] kasan_save_stack+0x22/0x50 [ 34.819172] __kasan_record_aux_stack+0x8e/0xa0 [ 34.819749] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.820392] remove_vma+0x139/0x170 [ 34.820916] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.821476] do_vmi_munmap+0x1f1/0x2b0 [ 34.821957] __vm_munmap+0x138/0x3a0 [ 34.822433] __x64_sys_munmap+0x59/0x80 [ 34.822941] do_syscall_64+0x3f/0x90 [ 34.823423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.824067] [ 34.824286] The buggy address belongs to the object at ffff88800df94740 [ 34.824286] which belongs to the cache vm_area_struct of size 168 [ 34.825778] The buggy address is located 88 bytes inside of [ 34.825778] freed 168-byte region [ffff88800df94740, ffff88800df947e8) [ 34.827200] [ 34.827415] The buggy address belongs to the physical page: [ 34.828076] page:00000000084fc7fb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf94 [ 34.829184] memcg:ffff888014479a01 [ 34.829611] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.830312] page_type: 0xffffffff() [ 34.830757] raw: 0100000000000200 ffff88800879fc80 ffffea000067ac80 dead000000000003 [ 34.831685] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014479a01 [ 34.832604] page dumped because: kasan: bad access detected [ 34.833280] [ 34.833499] Memory state around the buggy address: [ 34.834082] ffff88800df94680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.834954] ffff88800df94700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.835814] >ffff88800df94780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.836665] ^ [ 34.837182] ffff88800df94800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.838052] ffff88800df94880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.838906] ================================================================== [ 34.839919] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.751421] BUG: Bad rss-counter state mm:000000004fff42d0 type:MM_FILEPAGES val:33 [ 36.752409] BUG: Bad rss-counter state mm:000000004fff42d0 type:MM_ANONPAGES val:22 [ 37.241150] BUG: Bad rss-counter state mm:00000000f18f1b55 type:MM_FILEPAGES val:33 [ 37.242330] BUG: Bad rss-counter state mm:00000000f18f1b55 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53951' (ECDSA) to the list of known hosts. 2023/06/19 22:00:12 fuzzer started 2023/06/19 22:00:12 dialing manager at localhost:44161 2023/06/19 22:00:12 checking machine... 2023/06/19 22:00:12 checking revisions... [ 38.005897] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:00:12 testing simple program... [ 38.066607] cgroup: Unknown subsys name 'net' [ 38.108406] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:00:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffff888006b6f568 RDX=0000000000000001 RSI=ffffffff813ad6d0 RDI=ffff888006b6f4c8 RBP=ffff888006b6f520 RSP=ffff888006b6f458 R8 =0000000000000001 R9 =ffff888006b6f508 R10=0000000000038001 R11=0000000000003c0d R12=ffff888006b6f528 R13=ffff888006b6f510 R14=ffff888006b6f509 R15=ffff888006b6f4c8 RIP=ffffffff811306ec 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 00007fa8a634d900 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=00005618c4abf768 CR3=000000000cbf8000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=c856a5c94772035300000000000ae988 XMM05=bf7738877ad0b5750000000000135b30 XMM06=dfcdbad4f1609c370000000000134908 XMM07=fb795ef6d65770560000000000124450 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00005618c4aac290 CR3=0000000005482000 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=00007f7cf83915100000557795a92790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000