syzkaller login: [ 30.056230] BUG: Bad rss-counter state mm:000000007a392411 type:MM_FILEPAGES val:33 [ 30.057688] BUG: Bad rss-counter state mm:000000007a392411 type:MM_ANONPAGES val:22 [ 30.155995] ================================================================== [ 30.156502] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.157025] Read of size 8 at addr ffff88801a3da5c8 by task sshd/219 [ 30.157445] [ 30.157566] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.158043] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.158579] Call Trace: [ 30.158756] [ 30.158918] dump_stack_lvl+0x91/0xf0 [ 30.159188] print_report+0xcc/0x620 [ 30.159464] ? __virt_addr_valid+0x102/0x340 [ 30.159777] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.160118] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.160459] kasan_report+0xbe/0xf0 [ 30.160719] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.161062] vma_interval_tree_remove+0xc75/0xec0 [ 30.161495] vma_prepare+0xc54/0x11a0 [ 30.161830] __split_vma+0x5af/0x950 [ 30.162090] ? __pfx___split_vma+0x10/0x10 [ 30.162377] ? find_held_lock+0x2c/0x110 [ 30.162668] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.162980] ? lock_is_held_type+0x9f/0x120 [ 30.163276] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.163619] ? mtree_range_walk+0x632/0x900 [ 30.163944] ? mas_walk+0x5c7/0x7c0 [ 30.164206] do_vmi_munmap+0x1f1/0x2b0 [ 30.164474] mmap_region+0x1f9/0x2660 [ 30.164739] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.165023] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.165412] ? __pfx_lock_acquire+0x10/0x10 [ 30.165710] ? __pfx_mmap_region+0x10/0x10 [ 30.166019] ? security_mmap_addr+0x7d/0xa0 [ 30.166324] ? get_unmapped_area+0x1f5/0x3f0 [ 30.166637] do_mmap+0x854/0xf00 [ 30.166890] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.167174] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.167502] ksys_mmap_pgoff+0x3af/0x500 [ 30.167795] do_syscall_64+0x3f/0x90 [ 30.168072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.168447] RIP: 0033:0x7f4e6c6ced82 [ 30.168714] 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 [ 30.169938] RSP: 002b:00007ffe34d7bb78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.170456] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e6c6ced82 [ 30.170945] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e6bb08000 [ 30.171444] RBP: 00007f4e6bb08000 R08: 0000000000000009 R09: 0000000000001000 [ 30.171930] R10: 0000000000000812 R11: 0000000000000206 R12: 000055596713cec0 [ 30.172412] R13: 00007ffe34d7bb90 R14: 00007ffe34d7bbc0 R15: 00007ffe34d7bf20 [ 30.172908] [ 30.173076] [ 30.173199] Allocated by task 212: [ 30.173444] kasan_save_stack+0x22/0x50 [ 30.173731] kasan_set_track+0x25/0x30 [ 30.174016] __kasan_slab_alloc+0x59/0x70 [ 30.174311] kmem_cache_alloc+0x16b/0x370 [ 30.174604] vm_area_dup+0x20/0x160 [ 30.174865] __split_vma+0x170/0x950 [ 30.175132] split_vma+0xc6/0x110 [ 30.175383] mprotect_fixup+0x8d2/0xb30 [ 30.175676] do_mprotect_pkey+0x87e/0xd40 [ 30.175972] __x64_sys_mprotect+0x78/0xc0 [ 30.176269] do_syscall_64+0x3f/0x90 [ 30.176541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.176912] [ 30.177034] Freed by task 202: [ 30.177258] kasan_save_stack+0x22/0x50 [ 30.177546] kasan_set_track+0x25/0x30 [ 30.177831] kasan_save_free_info+0x2b/0x50 [ 30.178132] __kasan_slab_free+0x10a/0x190 [ 30.178434] kmem_cache_free+0x10d/0x4d0 [ 30.178725] rcu_core+0x8c8/0x2860 [ 30.178980] __do_softirq+0x1b7/0x7d4 [ 30.179255] [ 30.179376] Last potentially related work creation: [ 30.179724] kasan_save_stack+0x22/0x50 [ 30.180012] __kasan_record_aux_stack+0x8e/0xa0 [ 30.180342] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.180709] remove_vma+0x139/0x170 [ 30.180964] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.181285] do_vmi_munmap+0x1f1/0x2b0 [ 30.181561] __vm_munmap+0x138/0x3a0 [ 30.181828] __x64_sys_munmap+0x59/0x80 [ 30.182111] do_syscall_64+0x3f/0x90 [ 30.182382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.182747] [ 30.182869] The buggy address belongs to the object at ffff88801a3da570 [ 30.182869] which belongs to the cache vm_area_struct of size 168 [ 30.183732] The buggy address is located 88 bytes inside of [ 30.183732] freed 168-byte region [ffff88801a3da570, ffff88801a3da618) [ 30.184530] [ 30.184652] The buggy address belongs to the physical page: [ 30.185043] page:0000000051659f96 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3da [ 30.185671] memcg:ffff888018ca5301 [ 30.185918] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.186283] page_type: 0xffffffff() [ 30.186540] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.187064] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ca5301 [ 30.187593] page dumped because: kasan: bad access detected [ 30.187968] [ 30.188092] Memory state around the buggy address: [ 30.188418] ffff88801a3da480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.188909] ffff88801a3da500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.189392] >ffff88801a3da580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.189878] ^ [ 30.190256] ffff88801a3da600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.190744] ffff88801a3da680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.191228] ================================================================== [ 30.191866] Disabling lock debugging due to kernel taint [ 32.086507] BUG: Bad rss-counter state mm:00000000329a3413 type:MM_FILEPAGES val:33 [ 32.087287] BUG: Bad rss-counter state mm:00000000329a3413 type:MM_ANONPAGES val:22 [ 32.494220] BUG: Bad rss-counter state mm:00000000fd4283b6 type:MM_FILEPAGES val:33 [ 32.494991] BUG: Bad rss-counter state mm:00000000fd4283b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4288' (ECDSA) to the list of known hosts. 2023/06/20 16:55:54 fuzzer started 2023/06/20 16:55:54 dialing manager at localhost:36067 2023/06/20 16:55:54 checking machine... 2023/06/20 16:55:54 checking revisions... [ 33.177181] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:55:54 testing simple program... [ 33.207094] cgroup: Unknown subsys name 'net' [ 33.245063] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:55:54 Registers: info registers vcpu 0 RAX=0000000000006097 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=0000000000000001 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffff88801bc17860 RSP=ffff88801bc17738 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88801bc17868 R13=ffff88801bc17850 R14=ffff88801bc17849 R15=ffff88801bc17808 RIP=ffffffff8112fc12 RFL=00000202 [-------] 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 00007f17ee096900 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=00007f17ee64e0b0 CR3=0000000015936000 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=0000000000000001 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=00007f5ee98013e0 CR3=000000000946e000 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=a89a606c63038ebaf2488f7eebdf55f8 XMM02=2c67c8bc2e329bc3000000000011b130 XMM03=fb795ef6d657705600000000001222c8 XMM04=3333d900b926810600000000000ae988 XMM05=dfcdbad4f1609c370000000000132368 XMM06=8e5340b4ab96a62c00000000001311d0 XMM07=e042d86d42eb936e0000000000122548 XMM08=5a91a387e6469b24000000000011b190 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000