syzkaller login: [ 40.472577] BUG: Bad rss-counter state mm:00000000cd39118b type:MM_FILEPAGES val:33 [ 40.474534] BUG: Bad rss-counter state mm:00000000cd39118b type:MM_ANONPAGES val:22 [ 40.635465] ================================================================== [ 40.636391] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.637346] Read of size 8 at addr ffff88800dfe4d08 by task sshd/226 [ 40.638236] [ 40.638457] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.639314] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.640558] Call Trace: [ 40.640966] [ 40.641346] dump_stack_lvl+0x91/0xf0 [ 40.641990] print_report+0xcc/0x620 [ 40.642608] ? __virt_addr_valid+0x102/0x340 [ 40.643355] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.644155] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.644990] kasan_report+0xbe/0xf0 [ 40.645659] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.646497] vma_interval_tree_remove+0xc75/0xec0 [ 40.647313] vma_prepare+0xc54/0x11a0 [ 40.647951] __split_vma+0x5af/0x950 [ 40.648583] ? __pfx___split_vma+0x10/0x10 [ 40.649311] ? find_held_lock+0x2c/0x110 [ 40.650032] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.650774] ? lock_is_held_type+0x9f/0x120 [ 40.651349] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.651987] ? mtree_range_walk+0x632/0x900 [ 40.652581] ? mas_walk+0x5c7/0x7c0 [ 40.653078] do_vmi_munmap+0x1f1/0x2b0 [ 40.653642] mmap_region+0x1f9/0x2660 [ 40.654135] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.654688] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.655469] ? __pfx_lock_acquire+0x10/0x10 [ 40.656024] ? __pfx_mmap_region+0x10/0x10 [ 40.656597] ? security_mmap_addr+0x7d/0xa0 [ 40.657151] ? get_unmapped_area+0x1f5/0x3f0 [ 40.657759] do_mmap+0x854/0xf00 [ 40.658244] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.658758] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.659374] ksys_mmap_pgoff+0x3af/0x500 [ 40.659925] do_syscall_64+0x3f/0x90 [ 40.660447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.661121] RIP: 0033:0x7feaafa90d82 [ 40.661636] 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 [ 40.663865] RSP: 002b:00007fffcf125248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.664860] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feaafa90d82 [ 40.665788] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feaaeeca000 [ 40.666699] RBP: 00007feaaeeca000 R08: 0000000000000009 R09: 0000000000001000 [ 40.667614] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559862d5f980 [ 40.668514] R13: 00007fffcf125260 R14: 00007fffcf125290 R15: 00007fffcf1255f0 [ 40.669431] [ 40.669760] [ 40.669990] Allocated by task 219: [ 40.670452] kasan_save_stack+0x22/0x50 [ 40.670985] kasan_set_track+0x25/0x30 [ 40.671511] __kasan_slab_alloc+0x59/0x70 [ 40.672063] kmem_cache_alloc+0x16b/0x370 [ 40.672620] vm_area_dup+0x20/0x160 [ 40.673094] __split_vma+0x170/0x950 [ 40.673619] split_vma+0xc6/0x110 [ 40.674083] mprotect_fixup+0x8d2/0xb30 [ 40.674620] do_mprotect_pkey+0x87e/0xd40 [ 40.675187] __x64_sys_mprotect+0x78/0xc0 [ 40.675737] do_syscall_64+0x3f/0x90 [ 40.676263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.676944] [ 40.677172] Freed by task 219: [ 40.677630] kasan_save_stack+0x22/0x50 [ 40.678173] kasan_set_track+0x25/0x30 [ 40.678711] kasan_save_free_info+0x2b/0x50 [ 40.679288] __kasan_slab_free+0x10a/0x190 [ 40.679861] kmem_cache_free+0x10d/0x4d0 [ 40.680402] rcu_core+0x8c8/0x2860 [ 40.680880] __do_softirq+0x1b7/0x7d4 [ 40.681404] [ 40.681651] Last potentially related work creation: [ 40.682278] kasan_save_stack+0x22/0x50 [ 40.682836] __kasan_record_aux_stack+0x8e/0xa0 [ 40.683620] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.684388] remove_vma+0x139/0x170 [ 40.684869] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.685488] do_vmi_munmap+0x1f1/0x2b0 [ 40.686003] __vm_munmap+0x138/0x3a0 [ 40.686508] __x64_sys_munmap+0x59/0x80 [ 40.687038] do_syscall_64+0x3f/0x90 [ 40.687547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.688222] [ 40.688460] Second to last potentially related work creation: [ 40.689161] kasan_save_stack+0x22/0x50 [ 40.689726] __kasan_record_aux_stack+0x8e/0xa0 [ 40.690348] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.691010] remove_vma+0x139/0x170 [ 40.691494] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.692061] do_vmi_munmap+0x1f1/0x2b0 [ 40.692589] mmap_region+0x1f9/0x2660 [ 40.693093] do_mmap+0x854/0xf00 [ 40.693574] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.694121] ksys_mmap_pgoff+0x3af/0x500 [ 40.694664] do_syscall_64+0x3f/0x90 [ 40.695165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.695860] [ 40.696079] The buggy address belongs to the object at ffff88800dfe4cb0 [ 40.696079] which belongs to the cache vm_area_struct of size 168 [ 40.697678] The buggy address is located 88 bytes inside of [ 40.697678] freed 168-byte region [ffff88800dfe4cb0, ffff88800dfe4d58) [ 40.699128] [ 40.699366] The buggy address belongs to the physical page: [ 40.700035] page:000000003ceea43f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfe4 [ 40.701175] memcg:ffff88800e0d8601 [ 40.701670] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.702412] page_type: 0xffffffff() [ 40.702881] raw: 0100000000000200 ffff88800879fc80 ffffea00005a5d80 dead000000000003 [ 40.703865] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0d8601 [ 40.704835] page dumped because: kasan: bad access detected [ 40.705561] [ 40.705807] Memory state around the buggy address: [ 40.706433] ffff88800dfe4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 40.707354] ffff88800dfe4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 40.708248] >ffff88800dfe4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 40.709138] ^ [ 40.709644] ffff88800dfe4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 40.710557] ffff88800dfe4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 40.711493] ================================================================== [ 40.712511] Disabling lock debugging due to kernel taint [ 42.762475] BUG: Bad rss-counter state mm:00000000a67bd026 type:MM_FILEPAGES val:33 [ 42.763635] BUG: Bad rss-counter state mm:00000000a67bd026 type:MM_ANONPAGES val:22 [ 43.240077] BUG: Bad rss-counter state mm:00000000a6d356d7 type:MM_FILEPAGES val:33 [ 43.241140] BUG: Bad rss-counter state mm:00000000a6d356d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47162' (ECDSA) to the list of known hosts. 2023/06/20 04:17:30 fuzzer started 2023/06/20 04:17:30 dialing manager at localhost:44161 2023/06/20 04:17:30 checking machine... 2023/06/20 04:17:30 checking revisions... [ 43.936784] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:17:31 testing simple program... [ 43.987723] cgroup: Unknown subsys name 'net' [ 44.049126] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:17:20 Registers: info registers vcpu 0 RAX=ffffea00005dd108 RBX=0000000000000097 RCX=ffff88806ce401a0 RDX=ffffea000068bcc8 RSI=1ffffd40000d1799 RDI=ffff88806ce401a8 RBP=0000000000000001 RSP=ffff8880167e7a68 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=000000000001b608 R12=0000000000000001 R13=dffffc0000000000 R14=ffffea00005dd100 R15=ffff88806ce40140 RIP=ffffffff8178b76b 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 00007f4b287d3900 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=00007f4b28d88650 CR3=000000000da3a000 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=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 info registers vcpu 1 RAX=ffff888008e58001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e57a01 RSI=ffff888008e57a10 RDI=ffff888008e57988 RBP=ffff888008e579d0 RSP=ffff888008e578b0 R8 =0000000000000001 R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008e579d8 R13=ffff888008e579c0 R14=ffff888008e57a10 R15=ffff888008e57978 RIP=ffffffff811304d5 RFL=00000286 [--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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 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=00007f928a9bb000 CR3=0000000010160000 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=2030333a37313a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3533 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3533325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a37313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000