syzkaller login: [ 41.164735] BUG: Bad rss-counter state mm:00000000e5ff2eeb type:MM_FILEPAGES val:33 [ 41.165997] BUG: Bad rss-counter state mm:00000000e5ff2eeb type:MM_ANONPAGES val:22 [ 41.201425] ================================================================== [ 41.202339] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.203291] Read of size 8 at addr ffff88800efb6058 by task sshd/220 [ 41.204185] [ 41.204463] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.205325] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.206295] Call Trace: [ 41.206629] [ 41.206917] dump_stack_lvl+0x91/0xf0 [ 41.207425] print_report+0xcc/0x620 [ 41.207911] ? __virt_addr_valid+0x102/0x340 [ 41.208467] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.209091] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.209718] kasan_report+0xbe/0xf0 [ 41.210197] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.210834] vma_interval_tree_remove+0xc75/0xec0 [ 41.211449] vma_prepare+0xc54/0x11a0 [ 41.211936] __split_vma+0x5af/0x950 [ 41.212406] ? __pfx___split_vma+0x10/0x10 [ 41.212934] ? find_held_lock+0x2c/0x110 [ 41.213453] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.214023] ? lock_is_held_type+0x9f/0x120 [ 41.214569] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.215171] ? mtree_range_walk+0x632/0x900 [ 41.215737] ? mas_walk+0x5c7/0x7c0 [ 41.216209] do_vmi_munmap+0x1f1/0x2b0 [ 41.216710] mmap_region+0x1f9/0x2660 [ 41.217190] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.217703] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.218421] ? __pfx_lock_acquire+0x10/0x10 [ 41.218950] ? __pfx_mmap_region+0x10/0x10 [ 41.219491] ? security_mmap_addr+0x7d/0xa0 [ 41.220029] ? get_unmapped_area+0x1f5/0x3f0 [ 41.220582] do_mmap+0x854/0xf00 [ 41.221027] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.221526] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.222092] ksys_mmap_pgoff+0x3af/0x500 [ 41.222599] do_syscall_64+0x3f/0x90 [ 41.223086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.223752] RIP: 0033:0x7f0191fd1d82 [ 41.224210] 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 [ 41.226334] RSP: 002b:00007fffffecad68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.227238] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0191fd1d82 [ 41.228107] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f019140b000 [ 41.228944] RBP: 00007f019140b000 R08: 0000000000000009 R09: 0000000000001000 [ 41.229782] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b52d7d4ec0 [ 41.230618] R13: 00007fffffecad80 R14: 00007fffffecadb0 R15: 00007fffffecb110 [ 41.231489] [ 41.231786] [ 41.231999] Allocated by task 213: [ 41.232429] kasan_save_stack+0x22/0x50 [ 41.232931] kasan_set_track+0x25/0x30 [ 41.233424] __kasan_slab_alloc+0x59/0x70 [ 41.233950] kmem_cache_alloc+0x16b/0x370 [ 41.234467] vm_area_dup+0x20/0x160 [ 41.234928] __split_vma+0x170/0x950 [ 41.235406] split_vma+0xc6/0x110 [ 41.235844] mprotect_fixup+0x8d2/0xb30 [ 41.236351] do_mprotect_pkey+0x87e/0xd40 [ 41.236868] __x64_sys_mprotect+0x78/0xc0 [ 41.237394] do_syscall_64+0x3f/0x90 [ 41.237873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.238511] [ 41.238726] Freed by task 213: [ 41.239121] kasan_save_stack+0x22/0x50 [ 41.239645] kasan_set_track+0x25/0x30 [ 41.240146] kasan_save_free_info+0x2b/0x50 [ 41.240682] __kasan_slab_free+0x10a/0x190 [ 41.241217] kmem_cache_free+0x10d/0x4d0 [ 41.241724] rcu_core+0x8c8/0x2860 [ 41.242173] __do_softirq+0x1b7/0x7d4 [ 41.242646] [ 41.242862] Last potentially related work creation: [ 41.243467] kasan_save_stack+0x22/0x50 [ 41.243967] __kasan_record_aux_stack+0x8e/0xa0 [ 41.244532] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.245180] remove_vma+0x139/0x170 [ 41.245633] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.246189] do_vmi_munmap+0x1f1/0x2b0 [ 41.246674] __vm_munmap+0x138/0x3a0 [ 41.247138] __x64_sys_munmap+0x59/0x80 [ 41.247645] do_syscall_64+0x3f/0x90 [ 41.248118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.248760] [ 41.248976] Second to last potentially related work creation: [ 41.249664] kasan_save_stack+0x22/0x50 [ 41.250163] __kasan_record_aux_stack+0x8e/0xa0 [ 41.250732] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.251386] remove_vma+0x139/0x170 [ 41.251836] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.252390] do_vmi_munmap+0x1f1/0x2b0 [ 41.252874] mmap_region+0x1f9/0x2660 [ 41.253357] do_mmap+0x854/0xf00 [ 41.253793] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.254278] ksys_mmap_pgoff+0x3af/0x500 [ 41.254780] do_syscall_64+0x3f/0x90 [ 41.255259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.255906] [ 41.256125] The buggy address belongs to the object at ffff88800efb6000 [ 41.256125] which belongs to the cache vm_area_struct of size 168 [ 41.257578] The buggy address is located 88 bytes inside of [ 41.257578] freed 168-byte region [ffff88800efb6000, ffff88800efb60a8) [ 41.258976] [ 41.259192] The buggy address belongs to the physical page: [ 41.259870] page:00000000d3a85f76 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefb6 [ 41.260964] memcg:ffff88800efdaf01 [ 41.261389] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.262038] page_type: 0xffffffff() [ 41.262494] raw: 0100000000000200 ffff88800879fc80 ffffea00003671c0 dead000000000006 [ 41.263422] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efdaf01 [ 41.264318] page dumped because: kasan: bad access detected [ 41.264970] [ 41.265186] Memory state around the buggy address: [ 41.265766] ffff88800efb5f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.266626] ffff88800efb5f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.267491] >ffff88800efb6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.268346] ^ [ 41.269073] ffff88800efb6080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 41.269934] ffff88800efb6100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.270789] ================================================================== [ 41.272053] Disabling lock debugging due to kernel taint [ 42.982908] BUG: Bad rss-counter state mm:00000000f834d21b type:MM_FILEPAGES val:33 [ 42.983938] BUG: Bad rss-counter state mm:00000000f834d21b type:MM_ANONPAGES val:22 [ 43.389488] BUG: Bad rss-counter state mm:0000000086fe346b type:MM_FILEPAGES val:33 [ 43.391074] BUG: Bad rss-counter state mm:0000000086fe346b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59301' (ECDSA) to the list of known hosts. 2023/06/19 19:59:21 fuzzer started 2023/06/19 19:59:22 dialing manager at localhost:44161 2023/06/19 19:59:22 checking machine... 2023/06/19 19:59:22 checking revisions... [ 44.046769] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:59:22 testing simple program... [ 44.096647] cgroup: Unknown subsys name 'net' [ 44.135303] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:59:16 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800df23680 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c83e7 RDI=ffff88800df23a74 RBP=ffff88800df23680 RSP=ffff888014577518 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007fd9b0891366 R13=0000000000000000 R14=ffff88800df23680 R15=ffff88800e76ebe0 RIP=ffffffff8135bd9a RFL=00000217 [----APC] 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 00007fd9b039e900 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=00007fffa911f000 CR3=000000000e3d8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007fb6e56a5b00 CR3=0000000014522000 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=2031323a39353a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a39353a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000