[ 24.973432] BUG: Bad rss-counter state mm:00000000020f3a3e type:MM_FILEPAGES val:33 [ 24.975003] BUG: Bad rss-counter state mm:00000000020f3a3e type:MM_ANONPAGES val:22 [ 25.146830] ================================================================== [ 25.147803] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.148768] Read of size 8 at addr ffff88800e5eea50 by task sshd/221 [ 25.149547] [ 25.149876] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.150726] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.151666] Call Trace: [ 25.151984] [ 25.152264] dump_stack_lvl+0x91/0xf0 [ 25.152742] print_report+0xcc/0x620 [ 25.153218] ? __virt_addr_valid+0x102/0x340 [ 25.153751] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.154359] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.154955] kasan_report+0xbe/0xf0 [ 25.155418] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.156017] vma_interval_tree_remove+0xc75/0xec0 [ 25.156602] vma_prepare+0xc54/0x11a0 [ 25.157069] __split_vma+0x5af/0x950 [ 25.157526] ? __pfx___split_vma+0x10/0x10 [ 25.158043] ? find_held_lock+0x2c/0x110 [ 25.158572] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.159126] ? lock_is_held_type+0x9f/0x120 [ 25.159650] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.160241] ? mtree_range_walk+0x632/0x900 [ 25.160778] ? mas_walk+0x5c7/0x7c0 [ 25.161245] do_vmi_munmap+0x1f1/0x2b0 [ 25.161731] mmap_region+0x1f9/0x2660 [ 25.162215] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.162715] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.163422] ? __pfx_lock_acquire+0x10/0x10 [ 25.163943] ? __pfx_mmap_region+0x10/0x10 [ 25.164461] ? security_mmap_addr+0x7d/0xa0 [ 25.164981] ? get_unmapped_area+0x1f5/0x3f0 [ 25.165525] do_mmap+0x854/0xf00 [ 25.165958] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.166448] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.167003] ksys_mmap_pgoff+0x3af/0x500 [ 25.167503] do_syscall_64+0x3f/0x90 [ 25.167972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.168603] RIP: 0033:0x7fc4406acd82 [ 25.169049] 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 [ 25.171119] RSP: 002b:00007ffc8e84cf08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.171999] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4406acd82 [ 25.172831] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc43fae6000 [ 25.173657] RBP: 00007fc43fae6000 R08: 0000000000000009 R09: 0000000000001000 [ 25.174498] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6d3b3cf60 [ 25.175335] R13: 00007ffc8e84cf20 R14: 00007ffc8e84cf50 R15: 00007ffc8e84d2b0 [ 25.176178] [ 25.176471] [ 25.176685] Allocated by task 212: [ 25.177106] kasan_save_stack+0x22/0x50 [ 25.177603] kasan_set_track+0x25/0x30 [ 25.178110] __kasan_slab_alloc+0x59/0x70 [ 25.178625] kmem_cache_alloc+0x16b/0x370 [ 25.179132] vm_area_dup+0x20/0x160 [ 25.179578] __split_vma+0x170/0x950 [ 25.180037] split_vma+0xc6/0x110 [ 25.180475] mprotect_fixup+0x8d2/0xb30 [ 25.180973] do_mprotect_pkey+0x87e/0xd40 [ 25.181491] __x64_sys_mprotect+0x78/0xc0 [ 25.182006] do_syscall_64+0x3f/0x90 [ 25.182479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.183110] [ 25.183329] Freed by task 49: [ 25.183706] kasan_save_stack+0x22/0x50 [ 25.184206] kasan_set_track+0x25/0x30 [ 25.184693] kasan_save_free_info+0x2b/0x50 [ 25.185220] __kasan_slab_free+0x10a/0x190 [ 25.185744] kmem_cache_free+0x10d/0x4d0 [ 25.186251] rcu_core+0x8c8/0x2860 [ 25.186692] __do_softirq+0x1b7/0x7d4 [ 25.187159] [ 25.187375] Last potentially related work creation: [ 25.187951] kasan_save_stack+0x22/0x50 [ 25.188447] __kasan_record_aux_stack+0x8e/0xa0 [ 25.189010] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.189646] remove_vma+0x139/0x170 [ 25.190104] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.190650] do_vmi_munmap+0x1f1/0x2b0 [ 25.191130] __vm_munmap+0x138/0x3a0 [ 25.191587] __x64_sys_munmap+0x59/0x80 [ 25.192075] do_syscall_64+0x3f/0x90 [ 25.192541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.193170] [ 25.193383] Second to last potentially related work creation: [ 25.194049] kasan_save_stack+0x22/0x50 [ 25.194555] __kasan_record_aux_stack+0x8e/0xa0 [ 25.195125] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.195763] remove_vma+0x139/0x170 [ 25.196213] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.196759] do_vmi_munmap+0x1f1/0x2b0 [ 25.197232] mmap_region+0x1f9/0x2660 [ 25.197699] do_mmap+0x854/0xf00 [ 25.198129] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.198601] ksys_mmap_pgoff+0x3af/0x500 [ 25.199094] do_syscall_64+0x3f/0x90 [ 25.199556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.200192] [ 25.200404] The buggy address belongs to the object at ffff88800e5ee9f8 [ 25.200404] which belongs to the cache vm_area_struct of size 168 [ 25.201851] The buggy address is located 88 bytes inside of [ 25.201851] freed 168-byte region [ffff88800e5ee9f8, ffff88800e5eeaa0) [ 25.203247] [ 25.203458] The buggy address belongs to the physical page: [ 25.204105] page:00000000990e9132 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5ee [ 25.205166] memcg:ffff88800e4fea01 [ 25.205596] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.206248] page_type: 0xffffffff() [ 25.206696] raw: 0100000000000200 ffff88800879fc80 ffffea00003a2f80 dead000000000008 [ 25.207605] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4fea01 [ 25.208490] page dumped because: kasan: bad access detected [ 25.209150] [ 25.209360] Memory state around the buggy address: [ 25.209935] ffff88800e5ee900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.210788] ffff88800e5ee980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 25.211635] >ffff88800e5eea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.212467] ^ [ 25.213153] ffff88800e5eea80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 25.213986] ffff88800e5eeb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.214834] ================================================================== [ 25.215962] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.316718] BUG: Bad rss-counter state mm:0000000074f8deca type:MM_FILEPAGES val:33 [ 27.317912] BUG: Bad rss-counter state mm:0000000074f8deca type:MM_ANONPAGES val:22 [ 27.695039] BUG: Bad rss-counter state mm:00000000e2cf3b8d type:MM_FILEPAGES val:33 [ 27.696010] BUG: Bad rss-counter state mm:00000000e2cf3b8d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44396' (ECDSA) to the list of known hosts. 2023/06/20 01:30:14 fuzzer started 2023/06/20 01:30:15 dialing manager at localhost:44161 2023/06/20 01:30:15 checking machine... 2023/06/20 01:30:15 checking revisions... [ 28.469737] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:30:15 testing simple program... [ 28.522572] cgroup: Unknown subsys name 'net' [ 28.585347] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:30:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019b96fa8 RCX=0000000000000000 RDX=1ffff1100318024b RSI=ffffffff81f1966c RDI=ffff888018c0125a RBP=ffff888019b96fe0 RSP=ffff888019e57ca0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff888018c01238 R13=0000000000000001 R14=0000000000000001 R15=ffff888019b96fa8 RIP=ffffffff81f19686 RFL=00000216 [----AP-] 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 00007fc76d645900 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=00007fff6a931000 CR3=000000000fd48000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=ffffffffffffff00ffff000000000000 XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=ffff888008c58400 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=00007fe7232e2f80 CR3=000000000c5f4000 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=01dc23f82b898699534e24b32c8c04f0 XMM02=2c67c8bc2e329bc3000000000011d5a8 XMM03=fb795ef6d65770560000000000123ff0 XMM04=122bd0804d3c710800000000000ae988 XMM05=dfcdbad4f1609c370000000000134c18 XMM06=1a38165b1cb9d1880000000000133df0 XMM07=e042d86d42eb936e00000000001242c8 XMM08=371f4ccb754e6368000000000011d608 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000