[ 37.219658] BUG: Bad rss-counter state mm:000000002bac7f87 type:MM_FILEPAGES val:33 [ 37.220854] BUG: Bad rss-counter state mm:000000002bac7f87 type:MM_ANONPAGES val:22 [ 37.344631] ================================================================== [ 37.345544] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.346484] Read of size 8 at addr ffff88800b927798 by task sshd/219 [ 37.347416] [ 37.347635] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.348497] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.349511] Call Trace: [ 37.349830] [ 37.350110] dump_stack_lvl+0x91/0xf0 [ 37.350595] print_report+0xcc/0x620 [ 37.351103] ? __virt_addr_valid+0x102/0x340 [ 37.351656] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.352278] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.352899] kasan_report+0xbe/0xf0 [ 37.353375] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.353999] vma_interval_tree_remove+0xc75/0xec0 [ 37.354605] vma_prepare+0xc54/0x11a0 [ 37.355095] __split_vma+0x5af/0x950 [ 37.355562] ? __pfx___split_vma+0x10/0x10 [ 37.356091] ? find_held_lock+0x2c/0x110 [ 37.356613] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.357186] ? lock_is_held_type+0x9f/0x120 [ 37.357729] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.358336] ? mtree_range_walk+0x632/0x900 [ 37.358890] ? mas_walk+0x5c7/0x7c0 [ 37.359380] do_vmi_munmap+0x1f1/0x2b0 [ 37.359877] mmap_region+0x1f9/0x2660 [ 37.360368] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.360892] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.361618] ? __pfx_lock_acquire+0x10/0x10 [ 37.362150] ? __pfx_mmap_region+0x10/0x10 [ 37.362676] ? security_mmap_addr+0x7d/0xa0 [ 37.363233] ? get_unmapped_area+0x1f5/0x3f0 [ 37.363781] do_mmap+0x854/0xf00 [ 37.364219] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.364721] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.365288] ksys_mmap_pgoff+0x3af/0x500 [ 37.365801] do_syscall_64+0x3f/0x90 [ 37.366286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.366931] RIP: 0033:0x7f6ab0043d82 [ 37.367401] 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 [ 37.369554] RSP: 002b:00007ffd98779ec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.370470] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ab0043d82 [ 37.371347] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6aaf47d000 [ 37.372203] RBP: 00007f6aaf47d000 R08: 0000000000000009 R09: 0000000000001000 [ 37.373058] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557b2b8eec0 [ 37.373913] R13: 00007ffd98779ee0 R14: 00007ffd98779f10 R15: 00007ffd9877a270 [ 37.374771] [ 37.375074] [ 37.375292] Allocated by task 212: [ 37.375718] kasan_save_stack+0x22/0x50 [ 37.376221] kasan_set_track+0x25/0x30 [ 37.376719] __kasan_slab_alloc+0x59/0x70 [ 37.377243] kmem_cache_alloc+0x16b/0x370 [ 37.377765] vm_area_dup+0x20/0x160 [ 37.378219] __split_vma+0x170/0x950 [ 37.378690] split_vma+0xc6/0x110 [ 37.379150] mprotect_fixup+0x8d2/0xb30 [ 37.379661] do_mprotect_pkey+0x87e/0xd40 [ 37.380183] __x64_sys_mprotect+0x78/0xc0 [ 37.380708] do_syscall_64+0x3f/0x90 [ 37.381185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.381829] [ 37.382043] Freed by task 212: [ 37.382437] kasan_save_stack+0x22/0x50 [ 37.382938] kasan_set_track+0x25/0x30 [ 37.383450] kasan_save_free_info+0x2b/0x50 [ 37.383984] __kasan_slab_free+0x10a/0x190 [ 37.384528] kmem_cache_free+0x10d/0x4d0 [ 37.385036] rcu_core+0x8c8/0x2860 [ 37.385486] __do_softirq+0x1b7/0x7d4 [ 37.385962] [ 37.386179] Last potentially related work creation: [ 37.386769] kasan_save_stack+0x22/0x50 [ 37.387291] __kasan_record_aux_stack+0x8e/0xa0 [ 37.387872] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.388586] remove_vma+0x139/0x170 [ 37.389043] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.389599] do_vmi_munmap+0x1f1/0x2b0 [ 37.390089] __vm_munmap+0x138/0x3a0 [ 37.390561] __x64_sys_munmap+0x59/0x80 [ 37.391072] do_syscall_64+0x3f/0x90 [ 37.391558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.392202] [ 37.392416] The buggy address belongs to the object at ffff88800b927740 [ 37.392416] which belongs to the cache vm_area_struct of size 168 [ 37.393902] The buggy address is located 88 bytes inside of [ 37.393902] freed 168-byte region [ffff88800b927740, ffff88800b9277e8) [ 37.395342] [ 37.395560] The buggy address belongs to the physical page: [ 37.396220] page:000000002dc23e93 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb927 [ 37.397309] memcg:ffff88800eaba901 [ 37.397739] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.398394] page_type: 0xffffffff() [ 37.398843] raw: 0100000000000200 ffff88800879fc80 ffffea00003a4040 dead000000000008 [ 37.399789] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eaba901 [ 37.400707] page dumped because: kasan: bad access detected [ 37.401370] [ 37.401584] Memory state around the buggy address: [ 37.402161] ffff88800b927680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.403028] ffff88800b927700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.403915] >ffff88800b927780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.404778] ^ [ 37.405278] ffff88800b927800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 37.406135] ffff88800b927880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 37.406981] ================================================================== [ 37.407943] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 40.232629] BUG: Bad rss-counter state mm:000000009a0b3537 type:MM_FILEPAGES val:33 [ 40.233780] BUG: Bad rss-counter state mm:000000009a0b3537 type:MM_ANONPAGES val:22 [ 40.636080] BUG: Bad rss-counter state mm:000000005211f6db type:MM_FILEPAGES val:33 [ 40.637569] BUG: Bad rss-counter state mm:000000005211f6db type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49355' (ECDSA) to the list of known hosts. 2023/06/19 19:28:52 fuzzer started 2023/06/19 19:28:52 dialing manager at localhost:44161 2023/06/19 19:28:52 checking machine... 2023/06/19 19:28:52 checking revisions... [ 41.363756] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:28:52 testing simple program... [ 41.418456] cgroup: Unknown subsys name 'net' [ 41.484379] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:28:45 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f9ca69c7b80 CR3=000000000d4cc000 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=38323a3931203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363339 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8118dbb9 RDX=00000000000018dc RSI=00000000000018db RDI=ffffffff864edf30 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =0000000000000000 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000000791a R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09ab1 R15=ffff88806cf09a70 RIP=ffffffff811307e3 RFL=00000212 [----A--] 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 00007fb767229900 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=00007ffce31ca000 CR3=000000000eb80000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000