syzkaller login: [ 28.718656] BUG: Bad rss-counter state mm:00000000d7a284ee type:MM_FILEPAGES val:33 [ 28.720276] BUG: Bad rss-counter state mm:00000000d7a284ee type:MM_ANONPAGES val:22 [ 28.872587] ================================================================== [ 28.873702] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.874869] Read of size 8 at addr ffff88800e7526b0 by task sshd/220 [ 28.875862] [ 28.876117] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.876999] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.877989] Call Trace: [ 28.878307] [ 28.878591] dump_stack_lvl+0x91/0xf0 [ 28.879090] print_report+0xcc/0x620 [ 28.879582] ? __virt_addr_valid+0x102/0x340 [ 28.880178] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.880804] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.881445] kasan_report+0xbe/0xf0 [ 28.881943] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.882571] vma_interval_tree_remove+0xc75/0xec0 [ 28.883181] vma_prepare+0xc54/0x11a0 [ 28.883674] __split_vma+0x5af/0x950 [ 28.884194] ? __pfx___split_vma+0x10/0x10 [ 28.884742] ? find_held_lock+0x2c/0x110 [ 28.885269] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.885836] ? lock_is_held_type+0x9f/0x120 [ 28.886409] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.887023] ? mtree_range_walk+0x632/0x900 [ 28.887582] ? mas_walk+0x5c7/0x7c0 [ 28.888087] do_vmi_munmap+0x1f1/0x2b0 [ 28.888600] mmap_region+0x1f9/0x2660 [ 28.889095] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.889611] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.890357] ? __pfx_lock_acquire+0x10/0x10 [ 28.890899] ? __pfx_mmap_region+0x10/0x10 [ 28.891437] ? security_mmap_addr+0x7d/0xa0 [ 28.891970] ? get_unmapped_area+0x1f5/0x3f0 [ 28.892566] do_mmap+0x854/0xf00 [ 28.893012] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.893511] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.894099] ksys_mmap_pgoff+0x3af/0x500 [ 28.894614] do_syscall_64+0x3f/0x90 [ 28.895098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.895748] RIP: 0033:0x7fe6246abd82 [ 28.896251] 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 [ 28.898419] RSP: 002b:00007ffef4fb9438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.899331] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe6246abd82 [ 28.900238] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe623ae5000 [ 28.901092] RBP: 00007fe623ae5000 R08: 0000000000000009 R09: 0000000000001000 [ 28.901975] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d3d0d6fd90 [ 28.902830] R13: 00007ffef4fb9450 R14: 00007ffef4fb9480 R15: 00007ffef4fb97e0 [ 28.903705] [ 28.904000] [ 28.904253] Allocated by task 213: [ 28.904692] kasan_save_stack+0x22/0x50 [ 28.905204] kasan_set_track+0x25/0x30 [ 28.905707] __kasan_slab_alloc+0x59/0x70 [ 28.906249] kmem_cache_alloc+0x16b/0x370 [ 28.906773] vm_area_dup+0x20/0x160 [ 28.907234] __split_vma+0x170/0x950 [ 28.907704] split_vma+0xc6/0x110 [ 28.908183] mprotect_fixup+0x8d2/0xb30 [ 28.908695] do_mprotect_pkey+0x87e/0xd40 [ 28.909233] __x64_sys_mprotect+0x78/0xc0 [ 28.909768] do_syscall_64+0x3f/0x90 [ 28.910283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.910943] [ 28.911162] Freed by task 203: [ 28.911565] kasan_save_stack+0x22/0x50 [ 28.912100] kasan_set_track+0x25/0x30 [ 28.912619] kasan_save_free_info+0x2b/0x50 [ 28.913159] __kasan_slab_free+0x10a/0x190 [ 28.913705] kmem_cache_free+0x10d/0x4d0 [ 28.914227] rcu_core+0x8c8/0x2860 [ 28.914670] __do_softirq+0x1b7/0x7d4 [ 28.915151] [ 28.915372] Last potentially related work creation: [ 28.916071] kasan_save_stack+0x22/0x50 [ 28.916598] __kasan_record_aux_stack+0x8e/0xa0 [ 28.917174] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.917824] remove_vma+0x139/0x170 [ 28.918304] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.918870] do_vmi_munmap+0x1f1/0x2b0 [ 28.919363] __vm_munmap+0x138/0x3a0 [ 28.919835] __x64_sys_munmap+0x59/0x80 [ 28.920384] do_syscall_64+0x3f/0x90 [ 28.920863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.921518] [ 28.921733] The buggy address belongs to the object at ffff88800e752658 [ 28.921733] which belongs to the cache vm_area_struct of size 168 [ 28.923218] The buggy address is located 88 bytes inside of [ 28.923218] freed 168-byte region [ffff88800e752658, ffff88800e752700) [ 28.924672] [ 28.924892] The buggy address belongs to the physical page: [ 28.925551] page:00000000bf447503 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe752 [ 28.926659] memcg:ffff88800e2a1b01 [ 28.927090] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.927804] page_type: 0xffffffff() [ 28.928307] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b29c0 dead000000000003 [ 28.929243] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2a1b01 [ 28.930214] page dumped because: kasan: bad access detected [ 28.930886] [ 28.931104] Memory state around the buggy address: [ 28.931698] ffff88800e752580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.932617] ffff88800e752600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.933500] >ffff88800e752680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.934381] ^ [ 28.934974] ffff88800e752700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.935844] ffff88800e752780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.936752] ================================================================== [ 28.937689] Disabling lock debugging due to kernel taint [ 31.107428] BUG: Bad rss-counter state mm:00000000dd205abc type:MM_FILEPAGES val:33 [ 31.108512] BUG: Bad rss-counter state mm:00000000dd205abc type:MM_ANONPAGES val:22 [ 31.669218] BUG: Bad rss-counter state mm:00000000a885f90b type:MM_FILEPAGES val:33 [ 31.670442] BUG: Bad rss-counter state mm:00000000a885f90b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46441' (ECDSA) to the list of known hosts. 2023/06/21 01:16:12 fuzzer started 2023/06/21 01:16:12 dialing manager at localhost:36067 2023/06/21 01:16:12 checking machine... 2023/06/21 01:16:12 checking revisions... [ 32.305713] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:16:12 testing simple program... [ 32.349539] cgroup: Unknown subsys name 'net' [ 32.393597] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:16:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fff817e3e58 CR3=000000000dc3e000 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=2031313a36313a3130203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a36313a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801a0cb198 RBX=ffff888019362f40 RCX=1ffff11001f60719 RDX=dffffc0000000000 RSI=ffffffff87b89f80 RDI=ffff88800fb038c8 RBP=ffff88801c6a8ab0 RSP=ffff88806cf09d98 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6a61 R12=0000000000000283 R13=ffff88801c6a8b18 R14=ffff88800fb038b8 R15=ffffffff87b89f80 RIP=ffffffff844d2239 RFL=00000046 [---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 00007f8d26c0a900 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=00007f8d271c20b0 CR3=000000001857c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000