syzkaller login: [ 50.700790] BUG: Bad rss-counter state mm:00000000fa624997 type:MM_FILEPAGES val:33 [ 50.702015] BUG: Bad rss-counter state mm:00000000fa624997 type:MM_ANONPAGES val:22 [ 50.869132] ================================================================== [ 50.870146] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.871077] Read of size 8 at addr ffff88800ee33ed8 by task sshd/219 [ 50.871847] [ 50.872175] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.873033] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.874009] Call Trace: [ 50.874363] [ 50.874677] dump_stack_lvl+0x91/0xf0 [ 50.875190] print_report+0xcc/0x620 [ 50.875698] ? __virt_addr_valid+0x102/0x340 [ 50.876244] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.876853] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.877483] kasan_report+0xbe/0xf0 [ 50.877962] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.878573] vma_interval_tree_remove+0xc75/0xec0 [ 50.879171] vma_prepare+0xc54/0x11a0 [ 50.879687] __split_vma+0x5af/0x950 [ 50.880183] ? __pfx___split_vma+0x10/0x10 [ 50.880750] ? find_held_lock+0x2c/0x110 [ 50.881266] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.881840] ? lock_is_held_type+0x9f/0x120 [ 50.882367] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.882973] ? mtree_range_walk+0x632/0x900 [ 50.883515] ? mas_walk+0x5c7/0x7c0 [ 50.883987] do_vmi_munmap+0x1f1/0x2b0 [ 50.884480] mmap_region+0x1f9/0x2660 [ 50.884957] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.885492] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.886268] ? __pfx_lock_acquire+0x10/0x10 [ 50.886838] ? __pfx_mmap_region+0x10/0x10 [ 50.887401] ? security_mmap_addr+0x7d/0xa0 [ 50.887978] ? get_unmapped_area+0x1f5/0x3f0 [ 50.888584] do_mmap+0x854/0xf00 [ 50.889054] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.889611] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.890217] ksys_mmap_pgoff+0x3af/0x500 [ 50.890753] do_syscall_64+0x3f/0x90 [ 50.891268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.891967] RIP: 0033:0x7efd73400d82 [ 50.892466] 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 [ 50.894775] RSP: 002b:00007fffba0f11e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.895750] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efd73400d82 [ 50.896668] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efd7283a000 [ 50.897594] RBP: 00007efd7283a000 R08: 0000000000000009 R09: 0000000000001000 [ 50.898514] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ed0a2eec0 [ 50.899429] R13: 00007fffba0f1200 R14: 00007fffba0f1230 R15: 00007fffba0f1590 [ 50.900362] [ 50.900680] [ 50.900913] Allocated by task 212: [ 50.901384] kasan_save_stack+0x22/0x50 [ 50.901970] kasan_set_track+0x25/0x30 [ 50.902491] __kasan_slab_alloc+0x59/0x70 [ 50.903056] kmem_cache_alloc+0x16b/0x370 [ 50.903623] vm_area_dup+0x20/0x160 [ 50.904116] __split_vma+0x170/0x950 [ 50.904620] split_vma+0xc6/0x110 [ 50.905099] mprotect_fixup+0x8d2/0xb30 [ 50.905648] do_mprotect_pkey+0x87e/0xd40 [ 50.906221] __x64_sys_mprotect+0x78/0xc0 [ 50.906798] do_syscall_64+0x3f/0x90 [ 50.907319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.908026] [ 50.908263] Freed by task 212: [ 50.908697] kasan_save_stack+0x22/0x50 [ 50.909254] kasan_set_track+0x25/0x30 [ 50.909827] kasan_save_free_info+0x2b/0x50 [ 50.910406] __kasan_slab_free+0x10a/0x190 [ 50.910990] kmem_cache_free+0x10d/0x4d0 [ 50.911551] rcu_core+0x8c8/0x2860 [ 50.912034] __do_softirq+0x1b7/0x7d4 [ 50.912564] [ 50.912802] Last potentially related work creation: [ 50.913454] kasan_save_stack+0x22/0x50 [ 50.914003] __kasan_record_aux_stack+0x8e/0xa0 [ 50.914630] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.915347] remove_vma+0x139/0x170 [ 50.915852] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.916465] do_vmi_munmap+0x1f1/0x2b0 [ 50.916994] __vm_munmap+0x138/0x3a0 [ 50.917520] __x64_sys_munmap+0x59/0x80 [ 50.918075] do_syscall_64+0x3f/0x90 [ 50.918592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.919281] [ 50.919517] The buggy address belongs to the object at ffff88800ee33e80 [ 50.919517] which belongs to the cache vm_area_struct of size 168 [ 50.921145] The buggy address is located 88 bytes inside of [ 50.921145] freed 168-byte region [ffff88800ee33e80, ffff88800ee33f28) [ 50.922724] [ 50.922965] The buggy address belongs to the physical page: [ 50.923686] page:0000000098078744 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee33 [ 50.924867] memcg:ffff88800ef65301 [ 50.925336] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 50.926119] page_type: 0xffffffff() [ 50.926608] raw: 0100000000000200 ffff88800879fc80 ffffea0000379480 dead000000000003 [ 50.927626] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef65301 [ 50.928603] page dumped because: kasan: bad access detected [ 50.929305] [ 50.929545] Memory state around the buggy address: [ 50.930187] ffff88800ee33d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 50.931128] ffff88800ee33e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 50.932072] >ffff88800ee33e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.933003] ^ [ 50.933817] ffff88800ee33f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 50.934737] ffff88800ee33f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 50.935675] ================================================================== [ 50.936775] Disabling lock debugging due to kernel taint [ 52.771757] BUG: Bad rss-counter state mm:000000004e746be7 type:MM_FILEPAGES val:33 [ 52.772496] BUG: Bad rss-counter state mm:000000004e746be7 type:MM_ANONPAGES val:22 [ 53.182498] BUG: Bad rss-counter state mm:000000000d713a69 type:MM_FILEPAGES val:33 [ 53.183522] BUG: Bad rss-counter state mm:000000000d713a69 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31989' (ECDSA) to the list of known hosts. 2023/06/19 14:14:26 fuzzer started 2023/06/19 14:14:26 dialing manager at localhost:44161 2023/06/19 14:14:26 checking machine... 2023/06/19 14:14:26 checking revisions... [ 53.931137] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:14:26 testing simple program... [ 53.974396] cgroup: Unknown subsys name 'net' [ 54.014871] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:14:14 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=dffffc0000000000 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff815a755f RDI=ffffffff852be698 RBP=ffff88800d937d28 RSP=ffff88800d937c58 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=00000000000000bf R13=ffff88800d937d60 R14=00000000000000bf R15=ffffc90000683058 RIP=ffffffff814c07f1 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 00007f9f97357900 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=00005581b6a66318 CR3=000000000d924000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=fbe87612e352b75200000000000ae988 XMM05=cc5fe398936600760000000000134840 XMM06=dfcdbad4f1609c370000000000133618 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff818ea39d RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000003 RSP=ffff88801a0378c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800c88e280 R13=ffff88800c88e280 R14=ffff88800c88e2d8 R15=0000000000000002 RIP=ffffffff814c01d0 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 00007f694238c700 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=00007fff26e92718 CR3=000000000e57e000 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=34313a3431203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363638 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000