syzkaller login: [ 30.062984] sshd (215) used greatest stack depth: 24128 bytes left [ 30.064066] BUG: Bad rss-counter state mm:0000000019920bf7 type:MM_FILEPAGES val:33 [ 30.065433] BUG: Bad rss-counter state mm:0000000019920bf7 type:MM_ANONPAGES val:22 [ 30.238240] ================================================================== [ 30.239187] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.240139] Read of size 8 at addr ffff88800e889ed8 by task sshd/222 [ 30.240919] [ 30.241147] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.242130] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.243130] Call Trace: [ 30.243458] [ 30.243892] dump_stack_lvl+0x91/0xf0 [ 30.244503] print_report+0xcc/0x620 [ 30.245086] ? __virt_addr_valid+0x102/0x340 [ 30.245745] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.246479] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.247232] kasan_report+0xbe/0xf0 [ 30.247819] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.248609] vma_interval_tree_remove+0xc75/0xec0 [ 30.249362] vma_prepare+0xc54/0x11a0 [ 30.249958] __split_vma+0x5af/0x950 [ 30.250553] ? __pfx___split_vma+0x10/0x10 [ 30.251210] ? find_held_lock+0x2c/0x110 [ 30.251865] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.252589] ? lock_is_held_type+0x9f/0x120 [ 30.253197] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.253810] ? mtree_range_walk+0x632/0x900 [ 30.254367] ? mas_walk+0x5c7/0x7c0 [ 30.254842] do_vmi_munmap+0x1f1/0x2b0 [ 30.255334] mmap_region+0x1f9/0x2660 [ 30.255819] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.256332] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.257055] ? __pfx_lock_acquire+0x10/0x10 [ 30.257589] ? __pfx_mmap_region+0x10/0x10 [ 30.258126] ? security_mmap_addr+0x7d/0xa0 [ 30.258663] ? get_unmapped_area+0x1f5/0x3f0 [ 30.259219] do_mmap+0x854/0xf00 [ 30.259661] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.260159] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.260735] ksys_mmap_pgoff+0x3af/0x500 [ 30.261244] do_syscall_64+0x3f/0x90 [ 30.261723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.262376] RIP: 0033:0x7fa0a464cd82 [ 30.262832] 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 [ 30.264991] RSP: 002b:00007ffe132b1de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.265904] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa0a464cd82 [ 30.266768] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa0a3a86000 [ 30.267628] RBP: 00007fa0a3a86000 R08: 0000000000000009 R09: 0000000000001000 [ 30.268489] R10: 0000000000000812 R11: 0000000000000206 R12: 000056364622ef60 [ 30.269347] R13: 00007ffe132b1e00 R14: 00007ffe132b1e30 R15: 00007ffe132b2190 [ 30.270210] [ 30.270502] [ 30.270718] Allocated by task 215: [ 30.271149] kasan_save_stack+0x22/0x50 [ 30.271652] kasan_set_track+0x25/0x30 [ 30.272153] __kasan_slab_alloc+0x59/0x70 [ 30.272693] kmem_cache_alloc+0x16b/0x370 [ 30.273204] vm_area_dup+0x20/0x160 [ 30.273660] __split_vma+0x170/0x950 [ 30.274130] split_vma+0xc6/0x110 [ 30.274567] mprotect_fixup+0x8d2/0xb30 [ 30.275074] do_mprotect_pkey+0x87e/0xd40 [ 30.275601] __x64_sys_mprotect+0x78/0xc0 [ 30.276126] do_syscall_64+0x3f/0x90 [ 30.276615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.277264] [ 30.277487] Freed by task 215: [ 30.277879] kasan_save_stack+0x22/0x50 [ 30.278392] kasan_set_track+0x25/0x30 [ 30.278884] kasan_save_free_info+0x2b/0x50 [ 30.279413] __kasan_slab_free+0x10a/0x190 [ 30.279944] kmem_cache_free+0x10d/0x4d0 [ 30.280480] rcu_core+0x8c8/0x2860 [ 30.280935] __do_softirq+0x1b7/0x7d4 [ 30.281424] [ 30.281641] Last potentially related work creation: [ 30.282232] kasan_save_stack+0x22/0x50 [ 30.282809] __kasan_record_aux_stack+0x8e/0xa0 [ 30.283391] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.284042] remove_vma+0x139/0x170 [ 30.284508] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.285077] do_vmi_munmap+0x1f1/0x2b0 [ 30.285568] __vm_munmap+0x138/0x3a0 [ 30.286055] __x64_sys_munmap+0x59/0x80 [ 30.286556] do_syscall_64+0x3f/0x90 [ 30.287035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.287685] [ 30.287903] Second to last potentially related work creation: [ 30.288613] kasan_save_stack+0x22/0x50 [ 30.289121] __kasan_record_aux_stack+0x8e/0xa0 [ 30.289702] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.290358] remove_vma+0x139/0x170 [ 30.290819] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.291383] do_vmi_munmap+0x1f1/0x2b0 [ 30.291868] mmap_region+0x1f9/0x2660 [ 30.292350] do_mmap+0x854/0xf00 [ 30.292801] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.293310] ksys_mmap_pgoff+0x3af/0x500 [ 30.293815] do_syscall_64+0x3f/0x90 [ 30.294298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.294947] [ 30.295165] The buggy address belongs to the object at ffff88800e889e80 [ 30.295165] which belongs to the cache vm_area_struct of size 168 [ 30.296669] The buggy address is located 88 bytes inside of [ 30.296669] freed 168-byte region [ffff88800e889e80, ffff88800e889f28) [ 30.298072] [ 30.298293] The buggy address belongs to the physical page: [ 30.298951] page:0000000035be55f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe889 [ 30.300045] memcg:ffff88800e39d801 [ 30.300491] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.301140] page_type: 0xffffffff() [ 30.301625] raw: 0100000000000200 ffff8880087a0c80 ffffea0000325300 dead000000000006 [ 30.302564] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e39d801 [ 30.303490] page dumped because: kasan: bad access detected [ 30.304156] [ 30.304372] Memory state around the buggy address: [ 30.304970] ffff88800e889d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.305840] ffff88800e889e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.306711] >ffff88800e889e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.307570] ^ [ 30.308304] ffff88800e889f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.309196] ffff88800e889f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.310061] ================================================================== [ 30.311060] Disabling lock debugging due to kernel taint [ 32.178902] BUG: Bad rss-counter state mm:00000000b490e3a3 type:MM_FILEPAGES val:33 [ 32.179647] BUG: Bad rss-counter state mm:00000000b490e3a3 type:MM_ANONPAGES val:22 [ 32.703840] BUG: Bad rss-counter state mm:00000000830bf3e7 type:MM_FILEPAGES val:33 [ 32.705041] BUG: Bad rss-counter state mm:00000000830bf3e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22797' (ECDSA) to the list of known hosts. 2023/06/21 04:44:48 fuzzer started 2023/06/21 04:44:48 dialing manager at localhost:36067 2023/06/21 04:44:48 checking machine... 2023/06/21 04:44:48 checking revisions... [ 33.298181] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:44:48 testing simple program... [ 33.348651] cgroup: Unknown subsys name 'net' [ 33.392636] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:44:48 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=00007ffde3fe9b98 CR3=000000000f66c000 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=2037343a34343a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a34343a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800d996500 RCX=ffff88800d996500 RDX=00000000800c000a RSI=ffff88800d996500 RDI=ffff8880087b8780 RBP=ffff88800fb5f768 RSP=ffff88800fb5f6d0 R8 =00000000800c0009 R9 =0000000000000000 R10=ffffea0000366580 R11=00000000800d000b R12=ffffea0000366580 R13=ffff88800d996280 R14=00000000800c0009 R15=ffff8880087b8780 RIP=ffffffff81809672 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 00007f4e590a2900 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=00007f4e59657650 CR3=00000000168d8000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000