syzkaller login: [ 30.388761] BUG: Bad rss-counter state mm:00000000198388b6 type:MM_FILEPAGES val:33 [ 30.389973] BUG: Bad rss-counter state mm:00000000198388b6 type:MM_ANONPAGES val:22 [ 30.456047] ================================================================== [ 30.456944] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.457885] Read of size 8 at addr ffff88801769fed8 by task sshd/219 [ 30.458686] [ 30.458905] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.459974] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.460992] Call Trace: [ 30.461318] [ 30.461628] dump_stack_lvl+0x91/0xf0 [ 30.462136] print_report+0xcc/0x620 [ 30.462621] ? __virt_addr_valid+0x102/0x340 [ 30.463169] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.463784] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.464390] kasan_report+0xbe/0xf0 [ 30.464859] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.465476] vma_interval_tree_remove+0xc75/0xec0 [ 30.466102] vma_prepare+0xc54/0x11a0 [ 30.466583] __split_vma+0x5af/0x950 [ 30.467054] ? __pfx___split_vma+0x10/0x10 [ 30.467580] ? find_held_lock+0x2c/0x110 [ 30.468102] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.468666] ? lock_is_held_type+0x9f/0x120 [ 30.469205] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.469810] ? mtree_range_walk+0x632/0x900 [ 30.470370] ? mas_walk+0x5c7/0x7c0 [ 30.470840] do_vmi_munmap+0x1f1/0x2b0 [ 30.471332] mmap_region+0x1f9/0x2660 [ 30.471811] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.472319] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.473034] ? __pfx_lock_acquire+0x10/0x10 [ 30.473566] ? __pfx_mmap_region+0x10/0x10 [ 30.474100] ? security_mmap_addr+0x7d/0xa0 [ 30.474632] ? get_unmapped_area+0x1f5/0x3f0 [ 30.475190] do_mmap+0x854/0xf00 [ 30.475625] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.476126] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.476691] ksys_mmap_pgoff+0x3af/0x500 [ 30.477198] do_syscall_64+0x3f/0x90 [ 30.477675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.478344] RIP: 0033:0x7fab9dde4d82 [ 30.478796] 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 [ 30.480918] RSP: 002b:00007ffd2e443968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.481823] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab9dde4d82 [ 30.482670] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab9d21e000 [ 30.483514] RBP: 00007fab9d21e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.484354] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f71bc5ec0 [ 30.485198] R13: 00007ffd2e443980 R14: 00007ffd2e4439b0 R15: 00007ffd2e443d10 [ 30.486040] [ 30.486346] [ 30.486561] Allocated by task 212: [ 30.486982] kasan_save_stack+0x22/0x50 [ 30.487480] kasan_set_track+0x25/0x30 [ 30.487971] __kasan_slab_alloc+0x59/0x70 [ 30.488494] kmem_cache_alloc+0x16b/0x370 [ 30.488999] vm_area_dup+0x20/0x160 [ 30.489450] __split_vma+0x170/0x950 [ 30.489915] split_vma+0xc6/0x110 [ 30.490362] mprotect_fixup+0x8d2/0xb30 [ 30.490867] do_mprotect_pkey+0x87e/0xd40 [ 30.491388] __x64_sys_mprotect+0x78/0xc0 [ 30.491906] do_syscall_64+0x3f/0x90 [ 30.492383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.493030] [ 30.493245] Freed by task 20: [ 30.493628] kasan_save_stack+0x22/0x50 [ 30.494144] kasan_set_track+0x25/0x30 [ 30.494632] kasan_save_free_info+0x2b/0x50 [ 30.495162] __kasan_slab_free+0x10a/0x190 [ 30.495689] kmem_cache_free+0x10d/0x4d0 [ 30.496197] rcu_core+0x8c8/0x2860 [ 30.496635] __do_softirq+0x1b7/0x7d4 [ 30.497108] [ 30.497327] Last potentially related work creation: [ 30.497907] kasan_save_stack+0x22/0x50 [ 30.498412] __kasan_record_aux_stack+0x8e/0xa0 [ 30.498984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.499621] remove_vma+0x139/0x170 [ 30.500070] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.500623] do_vmi_munmap+0x1f1/0x2b0 [ 30.501110] __vm_munmap+0x138/0x3a0 [ 30.501574] __x64_sys_munmap+0x59/0x80 [ 30.502067] do_syscall_64+0x3f/0x90 [ 30.502560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.503198] [ 30.503416] The buggy address belongs to the object at ffff88801769fe80 [ 30.503416] which belongs to the cache vm_area_struct of size 168 [ 30.504955] The buggy address is located 88 bytes inside of [ 30.504955] freed 168-byte region [ffff88801769fe80, ffff88801769ff28) [ 30.506340] [ 30.506556] The buggy address belongs to the physical page: [ 30.507217] page:00000000775ae3b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1769f [ 30.508288] memcg:ffff888010304001 [ 30.508709] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.509345] page_type: 0xffffffff() [ 30.509788] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.510709] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010304001 [ 30.511606] page dumped because: kasan: bad access detected [ 30.512265] [ 30.512480] Memory state around the buggy address: [ 30.513062] ffff88801769fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.513910] ffff88801769fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.514787] >ffff88801769fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.515637] ^ [ 30.516369] ffff88801769ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.517223] ffff88801769ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.518065] ================================================================== [ 30.519004] Disabling lock debugging due to kernel taint [ 33.002477] BUG: Bad rss-counter state mm:0000000070f142f2 type:MM_FILEPAGES val:33 [ 33.003984] BUG: Bad rss-counter state mm:0000000070f142f2 type:MM_ANONPAGES val:22 [ 33.466901] BUG: Bad rss-counter state mm:00000000f1dbe671 type:MM_FILEPAGES val:33 [ 33.467928] BUG: Bad rss-counter state mm:00000000f1dbe671 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12355' (ECDSA) to the list of known hosts. 2023/06/20 21:17:31 fuzzer started 2023/06/20 21:17:31 dialing manager at localhost:36067 2023/06/20 21:17:31 checking machine... 2023/06/20 21:17:31 checking revisions... [ 34.159365] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:17:31 testing simple program... [ 34.215179] cgroup: Unknown subsys name 'net' [ 34.256089] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:17:31 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ff5c39e3b40 CR3=000000000defe000 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=2030333a37313a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a37313a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864b202c RDX=ffff88806cf09ae0 RSI=1ffff1100d9e135e RDI=1ffff1100d9e135e RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff864b2030 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff8880144c7f58 R15=ffff88806cf09a98 RIP=ffffffff811310a7 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 00007f872170c900 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=00007ffd9979b000 CR3=000000001c9c0000 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