syzkaller login: [ 162.796131] BUG: Bad rss-counter state mm:0000000096f51619 type:MM_FILEPAGES val:33 [ 162.797387] BUG: Bad rss-counter state mm:0000000096f51619 type:MM_ANONPAGES val:22 [ 162.951830] ================================================================== [ 162.952786] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 162.953760] Read of size 8 at addr ffff88800c8463f8 by task sshd/219 [ 162.954555] [ 162.954783] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 162.956006] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 162.957026] Call Trace: [ 162.957383] [ 162.957678] dump_stack_lvl+0x91/0xf0 [ 162.958179] print_report+0xcc/0x620 [ 162.958685] ? __virt_addr_valid+0x102/0x340 [ 162.959252] ? vma_interval_tree_remove+0xc75/0xec0 [ 162.959878] ? vma_interval_tree_remove+0xc75/0xec0 [ 162.960515] kasan_report+0xbe/0xf0 [ 162.961038] ? vma_interval_tree_remove+0xc75/0xec0 [ 162.961679] vma_interval_tree_remove+0xc75/0xec0 [ 162.962289] vma_prepare+0xc54/0x11a0 [ 162.962771] __split_vma+0x5af/0x950 [ 162.963257] ? __pfx___split_vma+0x10/0x10 [ 162.963784] ? find_held_lock+0x2c/0x110 [ 162.964306] do_vmi_align_munmap+0x2ba/0x11f0 [ 162.964877] ? lock_is_held_type+0x9f/0x120 [ 162.965440] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 162.966056] ? mtree_range_walk+0x632/0x900 [ 162.966608] ? mas_walk+0x5c7/0x7c0 [ 162.967091] do_vmi_munmap+0x1f1/0x2b0 [ 162.967586] mmap_region+0x1f9/0x2660 [ 162.968069] ? vm_mmap_pgoff+0x15c/0x3a0 [ 162.968583] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 162.969316] ? __pfx_lock_acquire+0x10/0x10 [ 162.969860] ? __pfx_mmap_region+0x10/0x10 [ 162.970390] ? security_mmap_addr+0x7d/0xa0 [ 162.970919] ? get_unmapped_area+0x1f5/0x3f0 [ 162.971480] do_mmap+0x854/0xf00 [ 162.971932] vm_mmap_pgoff+0x1a6/0x3a0 [ 162.972432] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 162.973014] ksys_mmap_pgoff+0x3af/0x500 [ 162.973521] do_syscall_64+0x3f/0x90 [ 162.974000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 162.974642] RIP: 0033:0x7f6e9d9cbd82 [ 162.975104] 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 [ 162.977254] RSP: 002b:00007fff294fb428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 162.978167] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e9d9cbd82 [ 162.979013] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e9ce05000 [ 162.979866] RBP: 00007f6e9ce05000 R08: 0000000000000009 R09: 0000000000001000 [ 162.980710] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b1b781ec0 [ 162.981566] R13: 00007fff294fb440 R14: 00007fff294fb470 R15: 00007fff294fb7d0 [ 162.982438] [ 162.982732] [ 162.982947] Allocated by task 212: [ 162.983377] kasan_save_stack+0x22/0x50 [ 162.983888] kasan_set_track+0x25/0x30 [ 162.984387] __kasan_slab_alloc+0x59/0x70 [ 162.984923] kmem_cache_alloc+0x16b/0x370 [ 162.985471] vm_area_dup+0x20/0x160 [ 162.985930] __split_vma+0x170/0x950 [ 162.986406] split_vma+0xc6/0x110 [ 162.986854] mprotect_fixup+0x8d2/0xb30 [ 162.987368] do_mprotect_pkey+0x87e/0xd40 [ 162.987893] __x64_sys_mprotect+0x78/0xc0 [ 162.988417] do_syscall_64+0x3f/0x90 [ 162.988889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 162.989546] [ 162.989764] Freed by task 212: [ 162.990165] kasan_save_stack+0x22/0x50 [ 162.990666] kasan_set_track+0x25/0x30 [ 162.991159] kasan_save_free_info+0x2b/0x50 [ 162.991697] __kasan_slab_free+0x10a/0x190 [ 162.992234] kmem_cache_free+0x10d/0x4d0 [ 162.992750] rcu_core+0x8c8/0x2860 [ 162.993215] __do_softirq+0x1b7/0x7d4 [ 162.993702] [ 162.993916] Last potentially related work creation: [ 162.994512] kasan_save_stack+0x22/0x50 [ 162.995034] __kasan_record_aux_stack+0x8e/0xa0 [ 162.995618] __call_rcu_common.constprop.0+0x6a/0xb90 [ 162.996276] remove_vma+0x139/0x170 [ 162.996736] do_vmi_align_munmap+0xd4a/0x11f0 [ 162.997408] do_vmi_munmap+0x1f1/0x2b0 [ 162.997907] __vm_munmap+0x138/0x3a0 [ 162.998389] __x64_sys_munmap+0x59/0x80 [ 162.998898] do_syscall_64+0x3f/0x90 [ 162.999374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 163.000035] [ 163.000253] Second to last potentially related work creation: [ 163.000946] kasan_save_stack+0x22/0x50 [ 163.001469] __kasan_record_aux_stack+0x8e/0xa0 [ 163.002058] __call_rcu_common.constprop.0+0x6a/0xb90 [ 163.002705] remove_vma+0x139/0x170 [ 163.003179] do_vmi_align_munmap+0xd4a/0x11f0 [ 163.003737] do_vmi_munmap+0x1f1/0x2b0 [ 163.004250] mmap_region+0x1f9/0x2660 [ 163.004747] do_mmap+0x854/0xf00 [ 163.005210] vm_mmap_pgoff+0x1a6/0x3a0 [ 163.005704] ksys_mmap_pgoff+0x3af/0x500 [ 163.006221] do_syscall_64+0x3f/0x90 [ 163.006707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 163.007361] [ 163.007581] The buggy address belongs to the object at ffff88800c8463a0 [ 163.007581] which belongs to the cache vm_area_struct of size 168 [ 163.009103] The buggy address is located 88 bytes inside of [ 163.009103] freed 168-byte region [ffff88800c8463a0, ffff88800c846448) [ 163.010551] [ 163.010773] The buggy address belongs to the physical page: [ 163.011443] page:000000001aaae622 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc846 [ 163.012561] memcg:ffff88800ce0a901 [ 163.013012] flags: 0x100000000000200(slab|node=0|zone=1) [ 163.013665] page_type: 0xffffffff() [ 163.014125] raw: 0100000000000200 ffff88800879fc80 ffffea0000332f00 dead000000000002 [ 163.015069] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce0a901 [ 163.015985] page dumped because: kasan: bad access detected [ 163.016653] [ 163.016872] Memory state around the buggy address: [ 163.017464] ffff88800c846280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 163.018341] ffff88800c846300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 163.019206] >ffff88800c846380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 163.020080] ^ [ 163.020929] ffff88800c846400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 163.021810] ffff88800c846480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 163.022678] ================================================================== [ 163.023642] Disabling lock debugging due to kernel taint [ 164.954463] BUG: Bad rss-counter state mm:000000004f4e2bc6 type:MM_FILEPAGES val:33 [ 164.955476] BUG: Bad rss-counter state mm:000000004f4e2bc6 type:MM_ANONPAGES val:22 [ 165.438451] BUG: Bad rss-counter state mm:0000000010feda36 type:MM_FILEPAGES val:33 [ 165.439681] BUG: Bad rss-counter state mm:0000000010feda36 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8417' (ECDSA) to the list of known hosts. 2023/06/19 14:45:52 fuzzer started 2023/06/19 14:45:52 dialing manager at localhost:44161 2023/06/19 14:45:52 checking machine... 2023/06/19 14:45:52 checking revisions... [ 166.175293] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:45:52 testing simple program... [ 166.229492] cgroup: Unknown subsys name 'net' [ 166.303638] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:43:39 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff110033d7e5c RSP=ffff888019ebf2c0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=000000000000001e RIP=ffffffff8135b910 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 00007f18a8a7f700 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=00007f245c5a60b0 CR3=000000000e0b8000 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=00000000000000000000000000000000 XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732031353a3534 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303435 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=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=00007ffb982ce0f0 CR3=0000000008ef0000 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=1929038d208be8a8774aca627ea0d921 XMM02=0000000000151808ec2efd57dc4c00df XMM03=00000000001584905cbe842b3aaa9796 XMM04=c08feb62432552f100000000000ae988 XMM05=dfcdbad4f1609c37000000000016d2f0 XMM06=1b1f867a1225fce7000000000016c158 XMM07=e042d86d42eb936e0000000000158710 XMM08=5cbe842b3aaa97960000000000151868 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000