syzkaller login: [ 30.152047] BUG: Bad rss-counter state mm:000000004a131090 type:MM_FILEPAGES val:33 [ 30.153273] BUG: Bad rss-counter state mm:000000004a131090 type:MM_ANONPAGES val:22 [ 30.326600] ================================================================== [ 30.327525] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.328477] Read of size 8 at addr ffff88800e803310 by task sshd/219 [ 30.329256] [ 30.329542] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.330437] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.331457] Call Trace: [ 30.331817] [ 30.332113] dump_stack_lvl+0x91/0xf0 [ 30.332620] print_report+0xcc/0x620 [ 30.333106] ? __virt_addr_valid+0x102/0x340 [ 30.333663] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.334322] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.334964] kasan_report+0xbe/0xf0 [ 30.335450] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.336090] vma_interval_tree_remove+0xc75/0xec0 [ 30.336707] vma_prepare+0xc54/0x11a0 [ 30.337190] __split_vma+0x5af/0x950 [ 30.337679] ? __pfx___split_vma+0x10/0x10 [ 30.338229] ? find_held_lock+0x2c/0x110 [ 30.338790] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.339370] ? lock_is_held_type+0x9f/0x120 [ 30.339921] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.340538] ? mtree_range_walk+0x632/0x900 [ 30.341101] ? mas_walk+0x5c7/0x7c0 [ 30.341592] do_vmi_munmap+0x1f1/0x2b0 [ 30.342111] mmap_region+0x1f9/0x2660 [ 30.342617] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.343144] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.343882] ? __pfx_lock_acquire+0x10/0x10 [ 30.344418] ? __pfx_mmap_region+0x10/0x10 [ 30.344962] ? security_mmap_addr+0x7d/0xa0 [ 30.345508] ? get_unmapped_area+0x1f5/0x3f0 [ 30.346073] do_mmap+0x854/0xf00 [ 30.346537] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.347035] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.347622] ksys_mmap_pgoff+0x3af/0x500 [ 30.348134] do_syscall_64+0x3f/0x90 [ 30.348631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.349283] RIP: 0033:0x7fec4b5f4d82 [ 30.349794] 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 [ 30.351983] RSP: 002b:00007fff4d610508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.352921] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec4b5f4d82 [ 30.353795] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec4aa2e000 [ 30.354686] RBP: 00007fec4aa2e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.355559] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562859566d90 [ 30.356414] R13: 00007fff4d610520 R14: 00007fff4d610550 R15: 00007fff4d6108b0 [ 30.357293] [ 30.357603] [ 30.357831] Allocated by task 212: [ 30.358263] kasan_save_stack+0x22/0x50 [ 30.358800] kasan_set_track+0x25/0x30 [ 30.359303] __kasan_slab_alloc+0x59/0x70 [ 30.359967] kmem_cache_alloc+0x16b/0x370 [ 30.360674] vm_area_dup+0x20/0x160 [ 30.361283] __split_vma+0x170/0x950 [ 30.361931] split_vma+0xc6/0x110 [ 30.362527] mprotect_fixup+0x8d2/0xb30 [ 30.363187] do_mprotect_pkey+0x87e/0xd40 [ 30.363877] __x64_sys_mprotect+0x78/0xc0 [ 30.364568] do_syscall_64+0x3f/0x90 [ 30.365209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.365929] [ 30.366155] Freed by task 212: [ 30.366589] kasan_save_stack+0x22/0x50 [ 30.367117] kasan_set_track+0x25/0x30 [ 30.367627] kasan_save_free_info+0x2b/0x50 [ 30.368167] __kasan_slab_free+0x10a/0x190 [ 30.368710] kmem_cache_free+0x10d/0x4d0 [ 30.369232] rcu_core+0x8c8/0x2860 [ 30.369709] __do_softirq+0x1b7/0x7d4 [ 30.370221] [ 30.370438] Last potentially related work creation: [ 30.371029] kasan_save_stack+0x22/0x50 [ 30.371548] __kasan_record_aux_stack+0x8e/0xa0 [ 30.372143] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.372809] remove_vma+0x139/0x170 [ 30.373273] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.373873] do_vmi_munmap+0x1f1/0x2b0 [ 30.374366] __vm_munmap+0x138/0x3a0 [ 30.374844] __x64_sys_munmap+0x59/0x80 [ 30.375352] do_syscall_64+0x3f/0x90 [ 30.375848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.376512] [ 30.376731] The buggy address belongs to the object at ffff88800e8032b8 [ 30.376731] which belongs to the cache vm_area_struct of size 168 [ 30.378259] The buggy address is located 88 bytes inside of [ 30.378259] freed 168-byte region [ffff88800e8032b8, ffff88800e803360) [ 30.379708] [ 30.379929] The buggy address belongs to the physical page: [ 30.380602] page:00000000350204ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe803 [ 30.381723] memcg:ffff88800ea39701 [ 30.382196] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.382871] page_type: 0xffffffff() [ 30.383329] raw: 0100000000000200 ffff8880087a0c80 ffffea0000381b40 dead000000000008 [ 30.384256] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea39701 [ 30.385186] page dumped because: kasan: bad access detected [ 30.385888] [ 30.386111] Memory state around the buggy address: [ 30.386746] ffff88800e803200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.387707] ffff88800e803280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.388745] >ffff88800e803300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.389648] ^ [ 30.390163] ffff88800e803380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.391088] ffff88800e803400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.391986] ================================================================== [ 30.393101] Disabling lock debugging due to kernel taint [ 32.378134] BUG: Bad rss-counter state mm:00000000c4347638 type:MM_FILEPAGES val:33 [ 32.379460] BUG: Bad rss-counter state mm:00000000c4347638 type:MM_ANONPAGES val:22 [ 32.875324] BUG: Bad rss-counter state mm:00000000e9ef5644 type:MM_FILEPAGES val:33 [ 32.876574] BUG: Bad rss-counter state mm:00000000e9ef5644 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19905' (ECDSA) to the list of known hosts. 2023/06/20 12:29:05 fuzzer started 2023/06/20 12:29:06 dialing manager at localhost:36067 2023/06/20 12:29:06 checking machine... 2023/06/20 12:29:06 checking revisions... [ 33.646509] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:29:06 testing simple program... [ 33.701919] cgroup: Unknown subsys name 'net' [ 33.776343] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:29:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=ffff88806ca620b8 RDX=0000000000000000 RSI=ffffffff84537da7 RDI=0000000000000000 RBP=ffffffff813782f8 RSP=ffff88806ce09e00 R8 =0000000023c0916b R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000000000 R12=ffff88800cf57260 R13=ffff88800844f780 R14=ffffffff813782f8 R15=ffff88800cf572e0 RIP=ffffffff8180f5ca RFL=00000282 [--S----] 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 0000000000000000 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=00007f15ddf93b50 CR3=0000000019fb0000 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=2035303a39323a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a39323a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff82177600 RCX=0000000000000000 RDX=000000005111d40c RSI=0000000000000003 RDI=ffff888016bd77f8 RBP=1ffff11002d7aefb RSP=ffff888016bd7728 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888008fe8ea0 R13=ffff88801a12b200 R14=dffffc0000000000 R15=ffff88801a12b200 RIP=ffffffff82177606 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 00007f535299a900 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=00007fff3818b000 CR3=000000000e97c000 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