syzkaller login: [ 31.913361] BUG: Bad rss-counter state mm:00000000d2109742 type:MM_FILEPAGES val:33 [ 31.914571] BUG: Bad rss-counter state mm:00000000d2109742 type:MM_ANONPAGES val:22 [ 31.953510] ================================================================== [ 31.954474] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.955465] Read of size 8 at addr ffff88800dee4968 by task sshd/220 [ 31.956318] [ 31.956549] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.957456] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.958485] Call Trace: [ 31.958820] [ 31.959119] dump_stack_lvl+0x91/0xf0 [ 31.959642] print_report+0xcc/0x620 [ 31.960271] ? __virt_addr_valid+0x102/0x340 [ 31.960855] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.961525] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.962176] kasan_report+0xbe/0xf0 [ 31.962703] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.963356] vma_interval_tree_remove+0xc75/0xec0 [ 31.964021] vma_prepare+0xc54/0x11a0 [ 31.964539] __split_vma+0x5af/0x950 [ 31.965041] ? __pfx___split_vma+0x10/0x10 [ 31.965606] ? find_held_lock+0x2c/0x110 [ 31.966162] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.966765] ? lock_is_held_type+0x9f/0x120 [ 31.967339] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.967991] ? mtree_range_walk+0x632/0x900 [ 31.968575] ? mas_walk+0x5c7/0x7c0 [ 31.969078] do_vmi_munmap+0x1f1/0x2b0 [ 31.969603] mmap_region+0x1f9/0x2660 [ 31.970124] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.970675] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.971437] ? __pfx_lock_acquire+0x10/0x10 [ 31.972015] ? __pfx_mmap_region+0x10/0x10 [ 31.972577] ? security_mmap_addr+0x7d/0xa0 [ 31.973136] ? get_unmapped_area+0x1f5/0x3f0 [ 31.973717] do_mmap+0x854/0xf00 [ 31.974191] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.974720] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.975324] ksys_mmap_pgoff+0x3af/0x500 [ 31.975886] do_syscall_64+0x3f/0x90 [ 31.976398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.977084] RIP: 0033:0x7fdde06d9d82 [ 31.977574] 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 [ 31.979829] RSP: 002b:00007ffdbee6b678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.980797] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdde06d9d82 [ 31.981697] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdddfb13000 [ 31.982594] RBP: 00007fdddfb13000 R08: 0000000000000009 R09: 0000000000001000 [ 31.983488] R10: 0000000000000812 R11: 0000000000000206 R12: 00005616f450eec0 [ 31.984406] R13: 00007ffdbee6b690 R14: 00007ffdbee6b6c0 R15: 00007ffdbee6ba20 [ 31.985313] [ 31.985623] [ 31.985852] Allocated by task 213: [ 31.986310] kasan_save_stack+0x22/0x50 [ 31.986849] kasan_set_track+0x25/0x30 [ 31.987373] __kasan_slab_alloc+0x59/0x70 [ 31.987936] kmem_cache_alloc+0x16b/0x370 [ 31.988485] vm_area_dup+0x20/0x160 [ 31.988964] __split_vma+0x170/0x950 [ 31.989465] split_vma+0xc6/0x110 [ 31.989984] mprotect_fixup+0x8d2/0xb30 [ 31.990522] do_mprotect_pkey+0x87e/0xd40 [ 31.991078] __x64_sys_mprotect+0x78/0xc0 [ 31.991651] do_syscall_64+0x3f/0x90 [ 31.992155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.992835] [ 31.993061] Freed by task 213: [ 31.993476] kasan_save_stack+0x22/0x50 [ 31.994010] kasan_set_track+0x25/0x30 [ 31.994537] kasan_save_free_info+0x2b/0x50 [ 31.995098] __kasan_slab_free+0x10a/0x190 [ 31.995672] kmem_cache_free+0x10d/0x4d0 [ 31.996209] rcu_core+0x8c8/0x2860 [ 31.996680] __do_softirq+0x1b7/0x7d4 [ 31.997190] [ 31.997416] Last potentially related work creation: [ 31.998036] kasan_save_stack+0x22/0x50 [ 31.998600] __kasan_record_aux_stack+0x8e/0xa0 [ 31.999218] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.999908] remove_vma+0x139/0x170 [ 32.000387] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.000979] do_vmi_munmap+0x1f1/0x2b0 [ 32.001501] __vm_munmap+0x138/0x3a0 [ 32.002017] __x64_sys_munmap+0x59/0x80 [ 32.002550] do_syscall_64+0x3f/0x90 [ 32.003054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.003762] [ 32.003992] Second to last potentially related work creation: [ 32.004720] kasan_save_stack+0x22/0x50 [ 32.005255] __kasan_record_aux_stack+0x8e/0xa0 [ 32.005869] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.006548] remove_vma+0x139/0x170 [ 32.007024] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.007617] do_vmi_munmap+0x1f1/0x2b0 [ 32.008131] mmap_region+0x1f9/0x2660 [ 32.008635] do_mmap+0x854/0xf00 [ 32.009087] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.009603] ksys_mmap_pgoff+0x3af/0x500 [ 32.010140] do_syscall_64+0x3f/0x90 [ 32.010645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.011335] [ 32.011579] The buggy address belongs to the object at ffff88800dee4910 [ 32.011579] which belongs to the cache vm_area_struct of size 168 [ 32.013142] The buggy address is located 88 bytes inside of [ 32.013142] freed 168-byte region [ffff88800dee4910, ffff88800dee49b8) [ 32.014637] [ 32.014873] The buggy address belongs to the physical page: [ 32.015585] page:000000003dc3b651 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdee4 [ 32.016734] memcg:ffff88800d2be601 [ 32.017189] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.017879] page_type: 0xffffffff() [ 32.018359] raw: 0100000000000200 ffff88800879fc80 ffffea0000365640 dead000000000004 [ 32.019338] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2be601 [ 32.020316] page dumped because: kasan: bad access detected [ 32.021022] [ 32.021253] Memory state around the buggy address: [ 32.021870] ffff88800dee4800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.022780] ffff88800dee4880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.023696] >ffff88800dee4900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.024601] ^ [ 32.025428] ffff88800dee4980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.026336] ffff88800dee4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.027244] ================================================================== [ 32.028459] Disabling lock debugging due to kernel taint [ 33.821671] BUG: Bad rss-counter state mm:00000000adeeb223 type:MM_FILEPAGES val:33 [ 33.822460] BUG: Bad rss-counter state mm:00000000adeeb223 type:MM_ANONPAGES val:22 [ 34.233875] BUG: Bad rss-counter state mm:000000001bed9ecc type:MM_FILEPAGES val:33 [ 34.235403] BUG: Bad rss-counter state mm:000000001bed9ecc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9038' (ECDSA) to the list of known hosts. 2023/06/19 15:15:10 fuzzer started 2023/06/19 15:15:10 dialing manager at localhost:44161 2023/06/19 15:15:10 checking machine... 2023/06/19 15:15:10 checking revisions... [ 34.957965] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:15:10 testing simple program... [ 35.006610] cgroup: Unknown subsys name 'net' [ 35.044142] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:15:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f1e9198 RCX=0000000000000000 RDX=1ffff11001e3d233 RSI=ffff88800f1e9198 RDI=ffff88800df079f0 RBP=ffff88800e52d8b8 RSP=ffff88806ce09d68 R8 =0000000000000001 R9 =ffffed100d9c13a5 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800df079e9 R13=ffff888016eee788 R14=ffff88800df079e8 R15=ffffffff87b86f80 RIP=ffffffff844cc42a RFL=00000002 [-------] 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 00007f2691e72700 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=00007f3f43e57038 CR3=000000000d89e000 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=2039303a35313a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a35313a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801a22b1d0 RCX=ffff88800879fdc0 RDX=ffffea0000688a40 RSI=ffff88801a22b0e8 RDI=ffff88800879fc80 RBP=0000000000000000 RSP=ffff888016cffa38 R8 =ffff88801a229438 R9 =0000000000000000 R10=ffffea0000688ac0 R11=000000008011000f R12=dffffc0000000000 R13=ffff888016cffa78 R14=ffff88800879fdc0 R15=ffff88801a22b0e8 RIP=ffffffff81810196 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 00007f572c9a1900 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=00007ffe91230000 CR3=000000000f7b8000 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=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