syzkaller login: [ 38.708857] BUG: Bad rss-counter state mm:000000008ea74b78 type:MM_FILEPAGES val:33 [ 38.709735] BUG: Bad rss-counter state mm:000000008ea74b78 type:MM_ANONPAGES val:22 [ 38.879699] ================================================================== [ 38.880664] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.881657] Read of size 8 at addr ffff88800cb3b4e0 by task sshd/219 [ 38.882453] [ 38.882743] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.883658] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.884693] Call Trace: [ 38.885037] [ 38.885331] dump_stack_lvl+0x91/0xf0 [ 38.885845] print_report+0xcc/0x620 [ 38.886347] ? __virt_addr_valid+0x102/0x340 [ 38.886920] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887572] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888220] kasan_report+0xbe/0xf0 [ 38.888717] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889514] vma_interval_tree_remove+0xc75/0xec0 [ 38.890323] vma_prepare+0xc54/0x11a0 [ 38.890934] __split_vma+0x5af/0x950 [ 38.891533] ? __pfx___split_vma+0x10/0x10 [ 38.892213] ? find_held_lock+0x2c/0x110 [ 38.892892] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.893645] ? lock_is_held_type+0x9f/0x120 [ 38.894224] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.894680] ? mtree_range_walk+0x632/0x900 [ 38.895111] ? mas_walk+0x5c7/0x7c0 [ 38.895475] do_vmi_munmap+0x1f1/0x2b0 [ 38.895842] mmap_region+0x1f9/0x2660 [ 38.896208] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.896592] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.897151] ? __pfx_lock_acquire+0x10/0x10 [ 38.897547] ? __pfx_mmap_region+0x10/0x10 [ 38.897947] ? security_mmap_addr+0x7d/0xa0 [ 38.898345] ? get_unmapped_area+0x1f5/0x3f0 [ 38.898761] do_mmap+0x854/0xf00 [ 38.899097] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.899470] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.899888] ksys_mmap_pgoff+0x3af/0x500 [ 38.900270] do_syscall_64+0x3f/0x90 [ 38.900631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.901126] RIP: 0033:0x7ff8e5449d82 [ 38.901473] 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 [ 38.903071] RSP: 002b:00007ffdf3907158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.903766] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff8e5449d82 [ 38.904408] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8e4883000 [ 38.905068] RBP: 00007ff8e4883000 R08: 0000000000000009 R09: 0000000000001000 [ 38.905703] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e1fd25ec0 [ 38.906296] R13: 00007ffdf3907170 R14: 00007ffdf39071a0 R15: 00007ffdf3907500 [ 38.906839] [ 38.907021] [ 38.907154] Allocated by task 212: [ 38.907427] kasan_save_stack+0x22/0x50 [ 38.907746] kasan_set_track+0x25/0x30 [ 38.908060] __kasan_slab_alloc+0x59/0x70 [ 38.908391] kmem_cache_alloc+0x16b/0x370 [ 38.908715] vm_area_dup+0x20/0x160 [ 38.909004] __split_vma+0x170/0x950 [ 38.909305] split_vma+0xc6/0x110 [ 38.909579] mprotect_fixup+0x8d2/0xb30 [ 38.909895] do_mprotect_pkey+0x87e/0xd40 [ 38.910223] __x64_sys_mprotect+0x78/0xc0 [ 38.910552] do_syscall_64+0x3f/0x90 [ 38.910847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.911254] [ 38.911389] Freed by task 19: [ 38.911629] kasan_save_stack+0x22/0x50 [ 38.911943] kasan_set_track+0x25/0x30 [ 38.912251] kasan_save_free_info+0x2b/0x50 [ 38.912587] __kasan_slab_free+0x10a/0x190 [ 38.912924] kmem_cache_free+0x10d/0x4d0 [ 38.913250] rcu_core+0x8c8/0x2860 [ 38.913530] __do_softirq+0x1b7/0x7d4 [ 38.913832] [ 38.913968] Last potentially related work creation: [ 38.914334] kasan_save_stack+0x22/0x50 [ 38.914650] __kasan_record_aux_stack+0x8e/0xa0 [ 38.915008] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.915411] remove_vma+0x139/0x170 [ 38.915696] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.916042] do_vmi_munmap+0x1f1/0x2b0 [ 38.916346] __vm_munmap+0x138/0x3a0 [ 38.916640] __x64_sys_munmap+0x59/0x80 [ 38.916949] do_syscall_64+0x3f/0x90 [ 38.917263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917669] [ 38.917804] Second to last potentially related work creation: [ 38.918237] kasan_save_stack+0x22/0x50 [ 38.918554] __kasan_record_aux_stack+0x8e/0xa0 [ 38.918913] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.919316] remove_vma+0x139/0x170 [ 38.919598] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.919947] do_vmi_munmap+0x1f1/0x2b0 [ 38.920253] __vm_munmap+0x138/0x3a0 [ 38.920547] elf_map+0x26f/0x310 [ 38.920828] load_elf_binary+0x3417/0x5030 [ 38.921172] bprm_execve+0x803/0x1940 [ 38.921468] kernel_execve+0x3ee/0x510 [ 38.921786] kernel_init+0x14f/0x2d0 [ 38.922085] ret_from_fork+0x2c/0x50 [ 38.922392] [ 38.922529] The buggy address belongs to the object at ffff88800cb3b488 [ 38.922529] which belongs to the cache vm_area_struct of size 168 [ 38.923483] The buggy address is located 88 bytes inside of [ 38.923483] freed 168-byte region [ffff88800cb3b488, ffff88800cb3b530) [ 38.924397] [ 38.924534] The buggy address belongs to the physical page: [ 38.924974] page:00000000313e1af2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb3b [ 38.925702] memcg:ffff88800ca17301 [ 38.925983] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.926400] page_type: 0xffffffff() [ 38.926691] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.927301] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca17301 [ 38.927896] page dumped because: kasan: bad access detected [ 38.928339] [ 38.928486] Memory state around the buggy address: [ 38.928861] ffff88800cb3b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.929425] ffff88800cb3b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.929988] >ffff88800cb3b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.930544] ^ [ 38.931035] ffff88800cb3b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 38.931594] ffff88800cb3b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.932150] ================================================================== [ 38.932791] Disabling lock debugging due to kernel taint [ 40.987057] BUG: Bad rss-counter state mm:00000000a4d95be6 type:MM_FILEPAGES val:33 [ 40.988151] BUG: Bad rss-counter state mm:00000000a4d95be6 type:MM_ANONPAGES val:22 [ 41.455522] BUG: Bad rss-counter state mm:000000003b0918d6 type:MM_FILEPAGES val:33 [ 41.456502] BUG: Bad rss-counter state mm:000000003b0918d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1605' (ECDSA) to the list of known hosts. 2023/06/20 13:07:02 fuzzer started 2023/06/20 13:07:02 dialing manager at localhost:36067 2023/06/20 13:07:02 checking machine... 2023/06/20 13:07:02 checking revisions... [ 42.147901] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:07:02 testing simple program... [ 42.191648] cgroup: Unknown subsys name 'net' [ 42.227291] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:07:02 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6b RBX=0000000000000000 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88800f1c7ef8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000029 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180f12f 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 00007ff05935e900 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=00007ff0599160b0 CR3=0000000009b16000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fd4d8067830 CR3=000000000f618000 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=2032303a37303a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a37303a3331203032 XMM08=6d65747379732f646d65747379732f62 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000