syzkaller login: [ 24.683976] BUG: Bad rss-counter state mm:000000009f5f4568 type:MM_FILEPAGES val:33 [ 24.685117] BUG: Bad rss-counter state mm:000000009f5f4568 type:MM_ANONPAGES val:22 [ 24.829148] ================================================================== [ 24.830224] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.831494] Read of size 8 at addr ffff88800e24cdf0 by task sshd/219 [ 24.832411] [ 24.832676] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.833721] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.834764] Call Trace: [ 24.835087] [ 24.835376] dump_stack_lvl+0x91/0xf0 [ 24.835867] print_report+0xcc/0x620 [ 24.836348] ? __virt_addr_valid+0x102/0x340 [ 24.836911] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.837534] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.838151] kasan_report+0xbe/0xf0 [ 24.838645] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.839263] vma_interval_tree_remove+0xc75/0xec0 [ 24.839861] vma_prepare+0xc54/0x11a0 [ 24.840336] __split_vma+0x5af/0x950 [ 24.840811] ? __pfx___split_vma+0x10/0x10 [ 24.841337] ? find_held_lock+0x2c/0x110 [ 24.841857] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.842420] ? lock_is_held_type+0x9f/0x120 [ 24.842979] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.843589] ? mtree_range_walk+0x632/0x900 [ 24.844137] ? mas_walk+0x5c7/0x7c0 [ 24.844609] do_vmi_munmap+0x1f1/0x2b0 [ 24.845101] mmap_region+0x1f9/0x2660 [ 24.845581] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.846094] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.846811] ? __pfx_lock_acquire+0x10/0x10 [ 24.847344] ? __pfx_mmap_region+0x10/0x10 [ 24.847874] ? security_mmap_addr+0x7d/0xa0 [ 24.848404] ? get_unmapped_area+0x1f5/0x3f0 [ 24.848953] do_mmap+0x854/0xf00 [ 24.849391] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.849882] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.850444] ksys_mmap_pgoff+0x3af/0x500 [ 24.850953] do_syscall_64+0x3f/0x90 [ 24.851431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.852075] RIP: 0033:0x7f4b4931dd82 [ 24.852538] 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 [ 24.854670] RSP: 002b:00007ffff620b178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.855585] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4b4931dd82 [ 24.856433] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4b48757000 [ 24.857284] RBP: 00007f4b48757000 R08: 0000000000000009 R09: 0000000000001000 [ 24.858129] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d020fa6980 [ 24.858979] R13: 00007ffff620b190 R14: 00007ffff620b1c0 R15: 00007ffff620b520 [ 24.859839] [ 24.860132] [ 24.860349] Allocated by task 212: [ 24.860775] kasan_save_stack+0x22/0x50 [ 24.861281] kasan_set_track+0x25/0x30 [ 24.861774] __kasan_slab_alloc+0x59/0x70 [ 24.862300] kmem_cache_alloc+0x16b/0x370 [ 24.862828] vm_area_dup+0x20/0x160 [ 24.863288] __split_vma+0x170/0x950 [ 24.863755] split_vma+0xc6/0x110 [ 24.864195] mprotect_fixup+0x8d2/0xb30 [ 24.864696] do_mprotect_pkey+0x87e/0xd40 [ 24.865265] __x64_sys_mprotect+0x78/0xc0 [ 24.865783] do_syscall_64+0x3f/0x90 [ 24.866253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.866910] [ 24.867128] Freed by task 212: [ 24.867519] kasan_save_stack+0x22/0x50 [ 24.868026] kasan_set_track+0x25/0x30 [ 24.868526] kasan_save_free_info+0x2b/0x50 [ 24.869065] __kasan_slab_free+0x10a/0x190 [ 24.869598] kmem_cache_free+0x10d/0x4d0 [ 24.870111] rcu_core+0x8c8/0x2860 [ 24.870560] __do_softirq+0x1b7/0x7d4 [ 24.871052] [ 24.871269] Last potentially related work creation: [ 24.871855] kasan_save_stack+0x22/0x50 [ 24.872404] __kasan_record_aux_stack+0x8e/0xa0 [ 24.872981] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.873623] remove_vma+0x139/0x170 [ 24.874071] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.874651] do_vmi_munmap+0x1f1/0x2b0 [ 24.875143] __vm_munmap+0x138/0x3a0 [ 24.875611] __x64_sys_munmap+0x59/0x80 [ 24.876112] do_syscall_64+0x3f/0x90 [ 24.876595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.877252] [ 24.877474] Second to last potentially related work creation: [ 24.878166] kasan_save_stack+0x22/0x50 [ 24.878675] __kasan_record_aux_stack+0x8e/0xa0 [ 24.879246] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.879885] remove_vma+0x139/0x170 [ 24.880338] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.880895] do_vmi_munmap+0x1f1/0x2b0 [ 24.881380] mmap_region+0x1f9/0x2660 [ 24.881860] do_mmap+0x854/0xf00 [ 24.882296] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.882805] ksys_mmap_pgoff+0x3af/0x500 [ 24.883307] do_syscall_64+0x3f/0x90 [ 24.883783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.884425] [ 24.884642] The buggy address belongs to the object at ffff88800e24cd98 [ 24.884642] which belongs to the cache vm_area_struct of size 168 [ 24.886107] The buggy address is located 88 bytes inside of [ 24.886107] freed 168-byte region [ffff88800e24cd98, ffff88800e24ce40) [ 24.887515] [ 24.887738] The buggy address belongs to the physical page: [ 24.888403] page:00000000fbf8686e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe24c [ 24.889496] memcg:ffff88800e032301 [ 24.889928] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.890569] page_type: 0xffffffff() [ 24.891050] raw: 0100000000000200 ffff88800879fc80 ffffea0000336480 dead000000000006 [ 24.891979] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e032301 [ 24.892884] page dumped because: kasan: bad access detected [ 24.893539] [ 24.893755] Memory state around the buggy address: [ 24.894336] ffff88800e24cc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.895200] ffff88800e24cd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.896053] >ffff88800e24cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.896895] ^ [ 24.897700] ffff88800e24ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.898551] ffff88800e24ce80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.899404] ================================================================== [ 24.900334] Disabling lock debugging due to kernel taint [ 27.460107] BUG: Bad rss-counter state mm:000000005a7e75e9 type:MM_FILEPAGES val:33 [ 27.461212] BUG: Bad rss-counter state mm:000000005a7e75e9 type:MM_ANONPAGES val:22 [ 28.009759] BUG: Bad rss-counter state mm:00000000b4c761ec type:MM_FILEPAGES val:33 [ 28.010916] BUG: Bad rss-counter state mm:00000000b4c761ec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41689' (ECDSA) to the list of known hosts. 2023/06/19 22:21:42 fuzzer started 2023/06/19 22:21:42 dialing manager at localhost:44161 2023/06/19 22:21:42 checking machine... 2023/06/19 22:21:42 checking revisions... [ 28.669516] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:21:42 testing simple program... [ 28.720148] cgroup: Unknown subsys name 'net' [ 28.759115] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:21:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff81621a2f RCX=0000000000000001 RDX=1ffff1100d9c1359 RSI=ffff88801662faa0 RDI=ffffffff81621a2f RBP=ffffffff81621a2f RSP=ffff88806ce09a20 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000002c985 R12=0000000000000001 R13=0000000000000000 R14=ffff888016ad8000 R15=ffff888019d86680 RIP=ffffffff811fc772 RFL=00000283 [--S---C] 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 00007f250f14c700 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=00007f2cf8c60650 CR3=000000000e6aa000 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=2031343a31323a3232203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a31323a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863b1c83 RBX=0000000000000001 RCX=ffffffff863b1c7e RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c76390 RBP=ffff888016447a38 RSP=ffff888016447970 R8 =ffffffff863b1c82 R9 =ffff888016447a20 R10=0000000000038001 R11=000000000008a973 R12=ffff888016447a40 R13=ffff888016447a28 R14=ffff888016447f20 R15=ffff8880164479e0 RIP=ffffffff81131127 RFL=00000216 [----AP-] 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 00007f2cf86ab900 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=00007f2cf8c630b0 CR3=000000001a14a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000