syzkaller login: [ 30.517083] BUG: Bad rss-counter state mm:000000008ef20374 type:MM_FILEPAGES val:33 [ 30.518531] BUG: Bad rss-counter state mm:000000008ef20374 type:MM_ANONPAGES val:22 [ 30.699216] ================================================================== [ 30.700228] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.701219] Read of size 8 at addr ffff888015aee058 by task sshd/220 [ 30.702177] [ 30.702409] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.703318] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.704389] Call Trace: [ 30.704732] [ 30.705035] dump_stack_lvl+0x91/0xf0 [ 30.705558] print_report+0xcc/0x620 [ 30.706073] ? __virt_addr_valid+0x102/0x340 [ 30.706656] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.707307] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.707973] kasan_report+0xbe/0xf0 [ 30.708479] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.709139] vma_interval_tree_remove+0xc75/0xec0 [ 30.709783] vma_prepare+0xc54/0x11a0 [ 30.710295] __split_vma+0x5af/0x950 [ 30.710795] ? __pfx___split_vma+0x10/0x10 [ 30.711354] ? find_held_lock+0x2c/0x110 [ 30.711907] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.712535] ? lock_is_held_type+0x9f/0x120 [ 30.713106] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.713747] ? mtree_range_walk+0x632/0x900 [ 30.714337] ? mas_walk+0x5c7/0x7c0 [ 30.714846] do_vmi_munmap+0x1f1/0x2b0 [ 30.715369] mmap_region+0x1f9/0x2660 [ 30.715883] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.716437] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.717189] ? __pfx_lock_acquire+0x10/0x10 [ 30.717754] ? __pfx_mmap_region+0x10/0x10 [ 30.718318] ? security_mmap_addr+0x7d/0xa0 [ 30.718881] ? get_unmapped_area+0x1f5/0x3f0 [ 30.719464] do_mmap+0x854/0xf00 [ 30.719938] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.720470] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.721071] ksys_mmap_pgoff+0x3af/0x500 [ 30.721613] do_syscall_64+0x3f/0x90 [ 30.722123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.722818] RIP: 0033:0x7f190d36dd82 [ 30.723301] 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 [ 30.725590] RSP: 002b:00007ffe32238e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.726547] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f190d36dd82 [ 30.727450] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f190c7a7000 [ 30.728358] RBP: 00007f190c7a7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.729261] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed584d1f70 [ 30.730162] R13: 00007ffe32238e70 R14: 00007ffe32238ea0 R15: 00007ffe32239200 [ 30.731080] [ 30.731394] [ 30.731623] Allocated by task 213: [ 30.732096] kasan_save_stack+0x22/0x50 [ 30.732632] kasan_set_track+0x25/0x30 [ 30.733159] __kasan_slab_alloc+0x59/0x70 [ 30.733714] kmem_cache_alloc+0x16b/0x370 [ 30.734264] vm_area_dup+0x20/0x160 [ 30.734740] __split_vma+0x170/0x950 [ 30.735233] split_vma+0xc6/0x110 [ 30.735701] mprotect_fixup+0x8d2/0xb30 [ 30.736238] do_mprotect_pkey+0x87e/0xd40 [ 30.736793] __x64_sys_mprotect+0x78/0xc0 [ 30.737345] do_syscall_64+0x3f/0x90 [ 30.737851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.738539] [ 30.738769] Freed by task 213: [ 30.739189] kasan_save_stack+0x22/0x50 [ 30.739728] kasan_set_track+0x25/0x30 [ 30.740266] kasan_save_free_info+0x2b/0x50 [ 30.740832] __kasan_slab_free+0x10a/0x190 [ 30.741400] kmem_cache_free+0x10d/0x4d0 [ 30.741937] rcu_core+0x8c8/0x2860 [ 30.742406] __do_softirq+0x1b7/0x7d4 [ 30.742967] [ 30.743197] Last potentially related work creation: [ 30.743824] kasan_save_stack+0x22/0x50 [ 30.744365] __kasan_record_aux_stack+0x8e/0xa0 [ 30.744975] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.745662] remove_vma+0x139/0x170 [ 30.746139] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.746735] do_vmi_munmap+0x1f1/0x2b0 [ 30.747250] __vm_munmap+0x138/0x3a0 [ 30.747746] __x64_sys_munmap+0x59/0x80 [ 30.748280] do_syscall_64+0x3f/0x90 [ 30.748792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.749477] [ 30.749711] Second to last potentially related work creation: [ 30.750439] kasan_save_stack+0x22/0x50 [ 30.750974] __kasan_record_aux_stack+0x8e/0xa0 [ 30.751584] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.752303] remove_vma+0x139/0x170 [ 30.752795] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.753407] do_vmi_munmap+0x1f1/0x2b0 [ 30.753940] mmap_region+0x1f9/0x2660 [ 30.754462] do_mmap+0x854/0xf00 [ 30.754937] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.755479] ksys_mmap_pgoff+0x3af/0x500 [ 30.756039] do_syscall_64+0x3f/0x90 [ 30.756564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.757273] [ 30.757511] The buggy address belongs to the object at ffff888015aee000 [ 30.757511] which belongs to the cache vm_area_struct of size 168 [ 30.759131] The buggy address is located 88 bytes inside of [ 30.759131] freed 168-byte region [ffff888015aee000, ffff888015aee0a8) [ 30.760695] [ 30.760929] The buggy address belongs to the physical page: [ 30.761651] page:000000001622d104 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15aee [ 30.762805] memcg:ffff88800e611301 [ 30.763258] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.764012] page_type: 0xffffffff() [ 30.764491] raw: 0100000000000200 ffff8880087a0c80 ffffea0000398580 0000000000000005 [ 30.765459] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e611301 [ 30.766418] page dumped because: kasan: bad access detected [ 30.767114] [ 30.767342] Memory state around the buggy address: [ 30.767967] ffff888015aedf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 30.768872] ffff888015aedf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.769778] >ffff888015aee000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.770679] ^ [ 30.771446] ffff888015aee080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 30.772372] ffff888015aee100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.773272] ================================================================== [ 30.774325] Disabling lock debugging due to kernel taint [ 33.106791] BUG: Bad rss-counter state mm:000000000a6992aa type:MM_FILEPAGES val:33 [ 33.107805] BUG: Bad rss-counter state mm:000000000a6992aa type:MM_ANONPAGES val:22 [ 33.622513] BUG: Bad rss-counter state mm:0000000021f4f926 type:MM_FILEPAGES val:33 [ 33.623750] BUG: Bad rss-counter state mm:0000000021f4f926 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57198' (ECDSA) to the list of known hosts. 2023/06/21 10:49:59 fuzzer started 2023/06/21 10:49:59 dialing manager at localhost:36067 2023/06/21 10:49:59 checking machine... 2023/06/21 10:49:59 checking revisions... [ 34.335068] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:49:59 testing simple program... [ 34.372763] cgroup: Unknown subsys name 'net' [ 34.428595] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:49:59 Registers: info registers vcpu 0 RAX=ffff888015fc4b80 RBX=ffff888015fc4b80 RCX=0000000000000000 RDX=ffff88800fbd1b40 RSI=ffffffff818e324c RDI=ffff888015fc4c08 RBP=0000000000000001 RSP=ffff888016857df8 R8 =0000000000000000 R9 =ffffed1002bf8981 R10=ffff888015fc4c0b R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=1ffff11002d0afd1 R15=0000000000000000 RIP=ffffffff83632543 RFL=00000293 [--S-A-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 00007f5f783bb900 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=00007f5f78970650 CR3=000000000e3de000 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=ffffffff81935bea RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001e3ce9a RSI=ffffffff81935bea RDI=ffff88800f1e7540 RBP=ffff88800f1e7510 RSP=ffff88800f1e7470 R8 =0000000000000001 R9 =ffff88800f1e74b8 R10=0000000000038001 R11=000000000002c9f1 R12=ffff88800f1e7540 R13=0000000000000000 R14=ffff88800ff751c0 R15=0000000000092c40 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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 00007f34ee4c0700 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=00007f400c246590 CR3=000000000db36000 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=2038353a39343a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a39343a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000