syzkaller login: [ 30.290129] BUG: Bad rss-counter state mm:00000000889afcef type:MM_FILEPAGES val:33 [ 30.291539] BUG: Bad rss-counter state mm:00000000889afcef type:MM_ANONPAGES val:22 [ 30.332113] ================================================================== [ 30.333254] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.334245] Read of size 8 at addr ffff88800c738310 by task sshd/220 [ 30.335096] [ 30.335316] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.336214] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.337443] Call Trace: [ 30.337846] <TASK> [ 30.338130] dump_stack_lvl+0x91/0xf0 [ 30.338736] print_report+0xcc/0x620 [ 30.339216] ? __virt_addr_valid+0x102/0x340 [ 30.339759] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.340375] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.340985] kasan_report+0xbe/0xf0 [ 30.341475] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.342091] vma_interval_tree_remove+0xc75/0xec0 [ 30.342686] vma_prepare+0xc54/0x11a0 [ 30.343161] __split_vma+0x5af/0x950 [ 30.343630] ? __pfx___split_vma+0x10/0x10 [ 30.344159] ? find_held_lock+0x2c/0x110 [ 30.344675] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.345265] ? lock_is_held_type+0x9f/0x120 [ 30.345803] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.346414] ? mtree_range_walk+0x632/0x900 [ 30.346965] ? mas_walk+0x5c7/0x7c0 [ 30.347447] do_vmi_munmap+0x1f1/0x2b0 [ 30.347934] mmap_region+0x1f9/0x2660 [ 30.348415] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.348922] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.349642] ? __pfx_lock_acquire+0x10/0x10 [ 30.350166] ? __pfx_mmap_region+0x10/0x10 [ 30.350697] ? security_mmap_addr+0x7d/0xa0 [ 30.351231] ? get_unmapped_area+0x1f5/0x3f0 [ 30.351779] do_mmap+0x854/0xf00 [ 30.352221] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.352714] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.353283] ksys_mmap_pgoff+0x3af/0x500 [ 30.353790] do_syscall_64+0x3f/0x90 [ 30.354265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.354915] RIP: 0033:0x7f8cf5622d82 [ 30.355367] 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 [ 30.357490] RSP: 002b:00007ffeda7a1d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.358400] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8cf5622d82 [ 30.359250] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8cf4a5c000 [ 30.360093] RBP: 00007f8cf4a5c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.360942] R10: 0000000000000812 R11: 0000000000000206 R12: 00005633a6dd7ec0 [ 30.361795] R13: 00007ffeda7a1da0 R14: 00007ffeda7a1dd0 R15: 00007ffeda7a2130 [ 30.362641] </TASK> [ 30.362936] [ 30.363155] Allocated by task 213: [ 30.363585] kasan_save_stack+0x22/0x50 [ 30.364099] kasan_set_track+0x25/0x30 [ 30.364587] __kasan_slab_alloc+0x59/0x70 [ 30.365129] kmem_cache_alloc+0x16b/0x370 [ 30.365644] vm_area_dup+0x20/0x160 [ 30.366106] __split_vma+0x170/0x950 [ 30.366577] split_vma+0xc6/0x110 [ 30.367018] mprotect_fixup+0x8d2/0xb30 [ 30.367516] do_mprotect_pkey+0x87e/0xd40 [ 30.368033] __x64_sys_mprotect+0x78/0xc0 [ 30.368547] do_syscall_64+0x3f/0x90 [ 30.369019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.369663] [ 30.369879] Freed by task 213: [ 30.370267] kasan_save_stack+0x22/0x50 [ 30.370762] kasan_set_track+0x25/0x30 [ 30.371253] kasan_save_free_info+0x2b/0x50 [ 30.371785] __kasan_slab_free+0x10a/0x190 [ 30.372313] kmem_cache_free+0x10d/0x4d0 [ 30.372823] rcu_core+0x8c8/0x2860 [ 30.373288] __do_softirq+0x1b7/0x7d4 [ 30.373764] [ 30.373977] Last potentially related work creation: [ 30.374580] kasan_save_stack+0x22/0x50 [ 30.375091] __kasan_record_aux_stack+0x8e/0xa0 [ 30.375678] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.376325] remove_vma+0x139/0x170 [ 30.376776] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.377342] do_vmi_munmap+0x1f1/0x2b0 [ 30.377830] __vm_munmap+0x138/0x3a0 [ 30.378304] __x64_sys_munmap+0x59/0x80 [ 30.378797] do_syscall_64+0x3f/0x90 [ 30.379275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.379916] [ 30.380142] Second to last potentially related work creation: [ 30.380830] kasan_save_stack+0x22/0x50 [ 30.381344] __kasan_record_aux_stack+0x8e/0xa0 [ 30.381919] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.382568] remove_vma+0x139/0x170 [ 30.383024] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.383657] do_vmi_munmap+0x1f1/0x2b0 [ 30.384145] mmap_region+0x1f9/0x2660 [ 30.384628] do_mmap+0x854/0xf00 [ 30.385065] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.385558] ksys_mmap_pgoff+0x3af/0x500 [ 30.386059] do_syscall_64+0x3f/0x90 [ 30.386538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.387182] [ 30.387395] The buggy address belongs to the object at ffff88800c7382b8 [ 30.387395] which belongs to the cache vm_area_struct of size 168 [ 30.388865] The buggy address is located 88 bytes inside of [ 30.388865] freed 168-byte region [ffff88800c7382b8, ffff88800c738360) [ 30.390256] [ 30.390473] The buggy address belongs to the physical page: [ 30.391133] page:000000009d030049 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc738 [ 30.392208] memcg:ffff88800db3c401 [ 30.392631] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.393288] page_type: 0xffffffff() [ 30.393744] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.394650] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db3c401 [ 30.395556] page dumped because: kasan: bad access detected [ 30.396222] [ 30.396438] Memory state around the buggy address: [ 30.397016] ffff88800c738200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.397876] ffff88800c738280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.398729] >ffff88800c738300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.399592] ^ [ 30.400064] ffff88800c738380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.400932] ffff88800c738400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.401797] ================================================================== [ 30.402786] Disabling lock debugging due to kernel taint [ 33.217056] BUG: Bad rss-counter state mm:000000000cb68678 type:MM_FILEPAGES val:33 [ 33.218325] BUG: Bad rss-counter state mm:000000000cb68678 type:MM_ANONPAGES val:22 [ 33.769439] BUG: Bad rss-counter state mm:00000000af10e63d type:MM_FILEPAGES val:33 [ 33.770593] BUG: Bad rss-counter state mm:00000000af10e63d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64557' (ECDSA) to the list of known hosts. 2023/06/21 06:38:05 fuzzer started 2023/06/21 06:38:05 dialing manager at localhost:36067 2023/06/21 06:38:05 checking machine... 2023/06/21 06:38:05 checking revisions... [ 34.436450] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:38:05 testing simple program... [ 34.486428] cgroup: Unknown subsys name 'net' [ 34.545932] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:38:05 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=0000000000000001 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=00007ffd61147898 CR3=0000000005482000 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=00007ff7a7e39510000055d5cdb17790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff81496389 RDX=0000000000004964 RSI=0000000000004963 RDI=ffffffff864fbf80 RBP=ffff88801697f4b0 RSP=ffff88801697f3e8 R8 =0000000000000000 R9 =ffff88801697f498 R10=0000000000038001 R11=0000000000014abb R12=ffff88801697f4b8 R13=ffff88801697f4a0 R14=ffff88801697f499 R15=ffff88801697f458 RIP=ffffffff811307e9 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 00007f72ec187900 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=00007ffd459ad000 CR3=000000000dfc2000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000