syzkaller login: [ 30.730031] BUG: Bad rss-counter state mm:000000007395d357 type:MM_FILEPAGES val:33 [ 30.731654] BUG: Bad rss-counter state mm:000000007395d357 type:MM_ANONPAGES val:22 [ 30.888087] ================================================================== [ 30.889206] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.890406] Read of size 8 at addr ffff888017cffdf0 by task sshd/220 [ 30.891411] [ 30.891697] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.892785] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.894009] Call Trace: [ 30.894405] [ 30.894754] dump_stack_lvl+0x91/0xf0 [ 30.895357] print_report+0xcc/0x620 [ 30.895943] ? __virt_addr_valid+0x102/0x340 [ 30.896623] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.897399] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.898148] kasan_report+0xbe/0xf0 [ 30.898718] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.899496] vma_interval_tree_remove+0xc75/0xec0 [ 30.900242] vma_prepare+0xc54/0x11a0 [ 30.900831] __split_vma+0x5af/0x950 [ 30.901444] ? __pfx___split_vma+0x10/0x10 [ 30.902099] ? find_held_lock+0x2c/0x110 [ 30.902747] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.903443] ? lock_is_held_type+0x9f/0x120 [ 30.904111] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.904857] ? mtree_range_walk+0x632/0x900 [ 30.905550] ? mas_walk+0x5c7/0x7c0 [ 30.906133] do_vmi_munmap+0x1f1/0x2b0 [ 30.906745] mmap_region+0x1f9/0x2660 [ 30.907329] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.907949] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.908841] ? __pfx_lock_acquire+0x10/0x10 [ 30.909522] ? __pfx_mmap_region+0x10/0x10 [ 30.910169] ? security_mmap_addr+0x7d/0xa0 [ 30.910822] ? get_unmapped_area+0x1f5/0x3f0 [ 30.911507] do_mmap+0x854/0xf00 [ 30.912047] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.912643] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.913320] ksys_mmap_pgoff+0x3af/0x500 [ 30.913960] do_syscall_64+0x3f/0x90 [ 30.914542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.915325] RIP: 0033:0x7fb90db0ed82 [ 30.915886] 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 [ 30.918526] RSP: 002b:00007ffc7266dfb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.919667] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb90db0ed82 [ 30.920722] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb90cf48000 [ 30.921794] RBP: 00007fb90cf48000 R08: 0000000000000009 R09: 0000000000001000 [ 30.922861] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557e2d7c7b20 [ 30.923898] R13: 00007ffc7266dfd0 R14: 00007ffc7266e000 R15: 00007ffc7266e360 [ 30.924981] [ 30.925341] [ 30.925613] Allocated by task 213: [ 30.926132] kasan_save_stack+0x22/0x50 [ 30.926754] kasan_set_track+0x25/0x30 [ 30.927359] __kasan_slab_alloc+0x59/0x70 [ 30.928005] kmem_cache_alloc+0x16b/0x370 [ 30.928632] vm_area_dup+0x20/0x160 [ 30.929183] __split_vma+0x170/0x950 [ 30.929785] split_vma+0xc6/0x110 [ 30.930314] mprotect_fixup+0x8d2/0xb30 [ 30.930916] do_mprotect_pkey+0x87e/0xd40 [ 30.931556] __x64_sys_mprotect+0x78/0xc0 [ 30.932209] do_syscall_64+0x3f/0x90 [ 30.932784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.933572] [ 30.933832] Freed by task 203: [ 30.934310] kasan_save_stack+0x22/0x50 [ 30.934932] kasan_set_track+0x25/0x30 [ 30.935542] kasan_save_free_info+0x2b/0x50 [ 30.936210] __kasan_slab_free+0x10a/0x190 [ 30.936853] kmem_cache_free+0x10d/0x4d0 [ 30.937479] rcu_core+0x8c8/0x2860 [ 30.938020] __do_softirq+0x1b7/0x7d4 [ 30.938614] [ 30.938873] Last potentially related work creation: [ 30.939598] kasan_save_stack+0x22/0x50 [ 30.940224] __kasan_record_aux_stack+0x8e/0xa0 [ 30.940933] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.941760] remove_vma+0x139/0x170 [ 30.942303] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.942981] do_vmi_munmap+0x1f1/0x2b0 [ 30.943581] __vm_munmap+0x138/0x3a0 [ 30.944149] __x64_sys_munmap+0x59/0x80 [ 30.944713] do_syscall_64+0x3f/0x90 [ 30.945239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.945897] [ 30.946106] The buggy address belongs to the object at ffff888017cffd98 [ 30.946106] which belongs to the cache vm_area_struct of size 168 [ 30.947492] The buggy address is located 88 bytes inside of [ 30.947492] freed 168-byte region [ffff888017cffd98, ffff888017cffe40) [ 30.948855] [ 30.949065] The buggy address belongs to the physical page: [ 30.949844] page:0000000079cf35f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17cff [ 30.951232] memcg:ffff88800fe7e901 [ 30.951764] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.952557] page_type: 0xffffffff() [ 30.953121] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.954267] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe7e901 [ 30.955412] page dumped because: kasan: bad access detected [ 30.956254] [ 30.956517] Memory state around the buggy address: [ 30.957234] ffff888017cffc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.958315] ffff888017cffd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.959391] >ffff888017cffd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.960466] ^ [ 30.961499] ffff888017cffe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.962587] ffff888017cffe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.963651] ================================================================== [ 30.965100] Disabling lock debugging due to kernel taint [ 32.893872] BUG: Bad rss-counter state mm:000000002e8931cb type:MM_FILEPAGES val:33 [ 32.895089] BUG: Bad rss-counter state mm:000000002e8931cb type:MM_ANONPAGES val:22 [ 33.425786] BUG: Bad rss-counter state mm:00000000898f704f type:MM_FILEPAGES val:33 [ 33.426689] BUG: Bad rss-counter state mm:00000000898f704f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24283' (ECDSA) to the list of known hosts. 2023/06/20 10:59:34 fuzzer started 2023/06/20 10:59:34 dialing manager at localhost:36067 2023/06/20 10:59:34 checking machine... 2023/06/20 10:59:34 checking revisions... [ 34.086723] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:59:34 testing simple program... [ 34.138311] cgroup: Unknown subsys name 'net' [ 34.192615] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:59:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801aa46ab0 RCX=0000000000000000 RDX=00000000ffffffff RSI=0000000000000004 RDI=ffff88801aa46ab0 RBP=1ffff110019c2ec7 RSP=ffff88800ce17628 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=ffff88801aa46ab8 R13=ffff88801aa46ac0 R14=ffffffff81803033 R15=000000008012000d RIP=ffffffff8180fed0 RFL=00000086 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fed93232900 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=00007fed92664970 CR3=000000000c708000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8c9e372ca938f27700000000000ae988 XMM05=29fd1d7d7e56252f0000000000131ee0 XMM06=19e9129bd510f2350000000000131028 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffff88800ca4a2e0 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff813710b9 RBP=ffff88806cf3a3d8 RSP=ffff88806cf09dc8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000084 R13=ffff88806cf3a3a8 R14=ffff88806cf3a2c0 R15=0000000000000000 RIP=ffffffff845118ad RFL=00000046 [---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 00007fcf323af900 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=00007ffe2c22c000 CR3=000000000caf6000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000