syzkaller login: [ 57.112161] BUG: Bad rss-counter state mm:0000000073abd549 type:MM_FILEPAGES val:33 [ 57.113396] BUG: Bad rss-counter state mm:0000000073abd549 type:MM_ANONPAGES val:22 [ 57.270745] ================================================================== [ 57.272088] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 57.273637] Read of size 8 at addr ffff88800e1c5a50 by task sshd/218 [ 57.274695] [ 57.274957] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 57.276049] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 57.277263] Call Trace: [ 57.277652] [ 57.278012] dump_stack_lvl+0x91/0xf0 [ 57.278605] print_report+0xcc/0x620 [ 57.279183] ? __virt_addr_valid+0x102/0x340 [ 57.279852] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.280606] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.281363] kasan_report+0xbe/0xf0 [ 57.281954] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.282726] vma_interval_tree_remove+0xc75/0xec0 [ 57.283455] vma_prepare+0xc54/0x11a0 [ 57.284042] __split_vma+0x5af/0x950 [ 57.284619] ? __pfx___split_vma+0x10/0x10 [ 57.285266] ? find_held_lock+0x2c/0x110 [ 57.285912] do_vmi_align_munmap+0x2ba/0x11f0 [ 57.286617] ? lock_is_held_type+0x9f/0x120 [ 57.287268] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 57.288014] ? mtree_range_walk+0x632/0x900 [ 57.288678] ? mas_walk+0x5c7/0x7c0 [ 57.289250] do_vmi_munmap+0x1f1/0x2b0 [ 57.289875] mmap_region+0x1f9/0x2660 [ 57.290470] ? vm_mmap_pgoff+0x15c/0x3a0 [ 57.291089] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 57.291964] ? __pfx_lock_acquire+0x10/0x10 [ 57.292622] ? __pfx_mmap_region+0x10/0x10 [ 57.293275] ? security_mmap_addr+0x7d/0xa0 [ 57.293938] ? get_unmapped_area+0x1f5/0x3f0 [ 57.294618] do_mmap+0x854/0xf00 [ 57.295153] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.295754] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 57.296448] ksys_mmap_pgoff+0x3af/0x500 [ 57.297065] do_syscall_64+0x3f/0x90 [ 57.297645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.298456] RIP: 0033:0x7efefe513d82 [ 57.299022] 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 [ 57.301669] RSP: 002b:00007ffccca82d38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 57.302805] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efefe513d82 [ 57.303851] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efefd94d000 [ 57.304894] RBP: 00007efefd94d000 R08: 0000000000000009 R09: 0000000000001000 [ 57.305942] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557985d2fec0 [ 57.306739] R13: 00007ffccca82d50 R14: 00007ffccca82d80 R15: 00007ffccca830e0 [ 57.307548] [ 57.307829] [ 57.308033] Allocated by task 211: [ 57.308440] kasan_save_stack+0x22/0x50 [ 57.308921] kasan_set_track+0x25/0x30 [ 57.309389] __kasan_slab_alloc+0x59/0x70 [ 57.309908] kmem_cache_alloc+0x16b/0x370 [ 57.310396] vm_area_dup+0x20/0x160 [ 57.310831] __split_vma+0x170/0x950 [ 57.311271] split_vma+0xc6/0x110 [ 57.311688] mprotect_fixup+0x8d2/0xb30 [ 57.312163] do_mprotect_pkey+0x87e/0xd40 [ 57.312659] __x64_sys_mprotect+0x78/0xc0 [ 57.313151] do_syscall_64+0x3f/0x90 [ 57.313607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.314219] [ 57.314426] Freed by task 211: [ 57.314811] kasan_save_stack+0x22/0x50 [ 57.315377] kasan_set_track+0x25/0x30 [ 57.315875] kasan_save_free_info+0x2b/0x50 [ 57.316402] __kasan_slab_free+0x10a/0x190 [ 57.316930] kmem_cache_free+0x10d/0x4d0 [ 57.317429] rcu_core+0x8c8/0x2860 [ 57.317881] __do_softirq+0x1b7/0x7d4 [ 57.318378] [ 57.318603] Last potentially related work creation: [ 57.319202] kasan_save_stack+0x22/0x50 [ 57.319715] __kasan_record_aux_stack+0x8e/0xa0 [ 57.320299] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.320938] remove_vma+0x139/0x170 [ 57.321401] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.321984] do_vmi_munmap+0x1f1/0x2b0 [ 57.322484] __vm_munmap+0x138/0x3a0 [ 57.322975] __x64_sys_munmap+0x59/0x80 [ 57.323469] do_syscall_64+0x3f/0x90 [ 57.323941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.324602] [ 57.324820] Second to last potentially related work creation: [ 57.325507] kasan_save_stack+0x22/0x50 [ 57.326032] __kasan_record_aux_stack+0x8e/0xa0 [ 57.326605] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.327255] remove_vma+0x139/0x170 [ 57.327705] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.328259] do_vmi_munmap+0x1f1/0x2b0 [ 57.328746] mmap_region+0x1f9/0x2660 [ 57.329225] do_mmap+0x854/0xf00 [ 57.329662] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.330155] ksys_mmap_pgoff+0x7d/0x500 [ 57.330663] do_syscall_64+0x3f/0x90 [ 57.331137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.331779] [ 57.331996] The buggy address belongs to the object at ffff88800e1c59f8 [ 57.331996] which belongs to the cache vm_area_struct of size 168 [ 57.333464] The buggy address is located 88 bytes inside of [ 57.333464] freed 168-byte region [ffff88800e1c59f8, ffff88800e1c5aa0) [ 57.334893] [ 57.335117] The buggy address belongs to the physical page: [ 57.335784] page:00000000a77e1be0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1c5 [ 57.336861] memcg:ffff88800e12c301 [ 57.337302] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 57.338007] page_type: 0xffffffff() [ 57.338467] raw: 0100000000000200 ffff88800879fc80 ffffea000037f300 dead000000000005 [ 57.339419] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e12c301 [ 57.340336] page dumped because: kasan: bad access detected [ 57.341016] [ 57.341234] Memory state around the buggy address: [ 57.341848] ffff88800e1c5900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 57.342703] ffff88800e1c5980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 57.343564] >ffff88800e1c5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 57.344437] ^ [ 57.345163] ffff88800e1c5a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 57.346041] ffff88800e1c5b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 57.346903] ================================================================== [ 57.347947] Disabling lock debugging due to kernel taint [ 59.211871] BUG: Bad rss-counter state mm:00000000150d07c6 type:MM_FILEPAGES val:33 [ 59.212800] BUG: Bad rss-counter state mm:00000000150d07c6 type:MM_ANONPAGES val:22 [ 59.743988] BUG: Bad rss-counter state mm:000000006196703f type:MM_FILEPAGES val:33 [ 59.745151] BUG: Bad rss-counter state mm:000000006196703f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14631' (ECDSA) to the list of known hosts. 2023/06/19 14:43:24 fuzzer started 2023/06/19 14:43:24 dialing manager at localhost:44161 2023/06/19 14:43:24 checking machine... 2023/06/19 14:43:24 checking revisions... [ 60.401898] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:43:24 testing simple program... [ 60.451699] cgroup: Unknown subsys name 'net' [ 60.488664] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:43:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888015cdf628 RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000039500 RDI=ffff888008deb128 RBP=ffff888008c58000 RSP=ffff888015cdf458 R8 =dffffc0000000000 R9 =0000000000000000 R10=ffff888008deb080 R11=0000000000020d00 R12=0000000000000000 R13=0000000000000001 R14=ffff888008deb100 R15=0000000000000075 RIP=ffffffff81269697 RFL=00000012 [----A--] 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 00007fb3cd222700 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=00007f88ae251390 CR3=000000000e230000 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=2033323a33343a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a33343a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800c4df798 RCX=ffffffff860d6801 RDX=0000000000000000 RSI=ffffffff8180c522 RDI=ffff88800c4df7a4 RBP=0000000000000000 RSP=ffff88800c4df6b0 R8 =ffffffff860d68fa R9 =ffff88800c4df710 R10=0000000000038001 R11=0000000000010b7e R12=ffff88800c4df798 R13=0000000000000000 R14=ffff88801a04b680 R15=0000000000000024 RIP=ffffffff813ad49e RFL=00000213 [----A-C] 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 00007fcb1746d900 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=00007ffee08f7000 CR3=000000000c44e000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000