syzkaller login: [ 60.007050] BUG: Bad rss-counter state mm:000000007563e5fe type:MM_FILEPAGES val:33 [ 60.008299] BUG: Bad rss-counter state mm:000000007563e5fe type:MM_ANONPAGES val:22 [ 60.178171] ================================================================== [ 60.179208] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.180367] Read of size 8 at addr ffff88800fd875c8 by task sshd/220 [ 60.181186] [ 60.181416] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.182389] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.183485] Call Trace: [ 60.183845] [ 60.184161] dump_stack_lvl+0x91/0xf0 [ 60.184707] print_report+0xcc/0x620 [ 60.185224] ? __virt_addr_valid+0x102/0x340 [ 60.185832] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.186505] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.187192] kasan_report+0xbe/0xf0 [ 60.187699] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.188375] vma_interval_tree_remove+0xc75/0xec0 [ 60.189056] vma_prepare+0xc54/0x11a0 [ 60.189605] __split_vma+0x5af/0x950 [ 60.190136] ? __pfx___split_vma+0x10/0x10 [ 60.190727] ? find_held_lock+0x2c/0x110 [ 60.191334] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.191968] ? lock_is_held_type+0x9f/0x120 [ 60.192564] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.193247] ? mtree_range_walk+0x632/0x900 [ 60.193861] ? mas_walk+0x5c7/0x7c0 [ 60.194392] do_vmi_munmap+0x1f1/0x2b0 [ 60.194950] mmap_region+0x1f9/0x2660 [ 60.195498] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.196077] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.196875] ? __pfx_lock_acquire+0x10/0x10 [ 60.197467] ? __pfx_mmap_region+0x10/0x10 [ 60.198054] ? security_mmap_addr+0x7d/0xa0 [ 60.198638] ? get_unmapped_area+0x1f5/0x3f0 [ 60.199285] do_mmap+0x854/0xf00 [ 60.199779] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.200332] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.200954] ksys_mmap_pgoff+0x3af/0x500 [ 60.201517] do_syscall_64+0x3f/0x90 [ 60.202057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.202784] RIP: 0033:0x7f38ec931d82 [ 60.203308] 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 [ 60.205689] RSP: 002b:00007ffd91372ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.206703] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38ec931d82 [ 60.207669] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38ebd6b000 [ 60.208620] RBP: 00007f38ebd6b000 R08: 0000000000000009 R09: 0000000000001000 [ 60.209567] R10: 0000000000000812 R11: 0000000000000206 R12: 000055967eaffec0 [ 60.210494] R13: 00007ffd91372ec0 R14: 00007ffd91372ef0 R15: 00007ffd91373250 [ 60.211450] [ 60.211772] [ 60.212010] Allocated by task 213: [ 60.212488] kasan_save_stack+0x22/0x50 [ 60.213051] kasan_set_track+0x25/0x30 [ 60.213598] __kasan_slab_alloc+0x59/0x70 [ 60.214204] kmem_cache_alloc+0x16b/0x370 [ 60.214794] vm_area_dup+0x20/0x160 [ 60.215318] __split_vma+0x170/0x950 [ 60.215825] split_vma+0xc6/0x110 [ 60.216319] mprotect_fixup+0x8d2/0xb30 [ 60.216885] do_mprotect_pkey+0x87e/0xd40 [ 60.217463] __x64_sys_mprotect+0x78/0xc0 [ 60.218050] do_syscall_64+0x3f/0x90 [ 60.218580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.219307] [ 60.219552] Freed by task 213: [ 60.219986] kasan_save_stack+0x22/0x50 [ 60.220549] kasan_set_track+0x25/0x30 [ 60.221164] kasan_save_free_info+0x2b/0x50 [ 60.221756] __kasan_slab_free+0x10a/0x190 [ 60.222338] kmem_cache_free+0x10d/0x4d0 [ 60.222898] rcu_core+0x8c8/0x2860 [ 60.223421] __do_softirq+0x1b7/0x7d4 [ 60.223968] [ 60.224217] Last potentially related work creation: [ 60.224892] kasan_save_stack+0x22/0x50 [ 60.225470] __kasan_record_aux_stack+0x8e/0xa0 [ 60.226123] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.226890] remove_vma+0x139/0x170 [ 60.227419] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.228043] do_vmi_munmap+0x1f1/0x2b0 [ 60.228597] __vm_munmap+0x138/0x3a0 [ 60.229109] __x64_sys_munmap+0x59/0x80 [ 60.229665] do_syscall_64+0x3f/0x90 [ 60.230199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.230959] [ 60.231196] The buggy address belongs to the object at ffff88800fd87570 [ 60.231196] which belongs to the cache vm_area_struct of size 168 [ 60.232809] The buggy address is located 88 bytes inside of [ 60.232809] freed 168-byte region [ffff88800fd87570, ffff88800fd87618) [ 60.234329] [ 60.234573] The buggy address belongs to the physical page: [ 60.235306] page:00000000bc3ec887 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd87 [ 60.236500] memcg:ffff88800c9d8c01 [ 60.236980] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.237709] page_type: 0xffffffff() [ 60.238219] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.239278] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9d8c01 [ 60.240314] page dumped because: kasan: bad access detected [ 60.241067] [ 60.241311] Memory state around the buggy address: [ 60.241974] ffff88800fd87480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.242945] ffff88800fd87500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 60.243912] >ffff88800fd87580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.244869] ^ [ 60.245614] ffff88800fd87600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 60.246576] ffff88800fd87680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.247551] ================================================================== [ 60.248674] Disabling lock debugging due to kernel taint [ 62.140907] BUG: Bad rss-counter state mm:000000005e9c952d type:MM_FILEPAGES val:33 [ 62.141688] BUG: Bad rss-counter state mm:000000005e9c952d type:MM_ANONPAGES val:22 [ 62.533366] BUG: Bad rss-counter state mm:00000000f5a0b8aa type:MM_FILEPAGES val:33 [ 62.534326] BUG: Bad rss-counter state mm:00000000f5a0b8aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46376' (ECDSA) to the list of known hosts. 2023/06/20 12:58:31 fuzzer started 2023/06/20 12:58:31 dialing manager at localhost:36067 2023/06/20 12:58:31 checking machine... 2023/06/20 12:58:32 checking revisions... [ 63.230942] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:58:32 testing simple program... [ 63.283583] cgroup: Unknown subsys name 'net' [ 63.332613] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:58:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015c4f778 RCX=0000000000000001 RDX=1ffff11002b89f08 RSI=ffffffff846000aa RDI=ffff888015c4f784 RBP=ffff888015c4f840 RSP=ffff888015c4f690 R8 =0000000000000001 R9 =ffff888015c4f6f0 R10=0000000000038001 R11=00000000000b5080 R12=ffff888015c4f778 R13=0000000000000000 R14=ffff88800dcbd1c0 R15=0000000000000000 RIP=ffffffff813ad547 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 00007f1096511900 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=00007f10964d6008 CR3=000000001820c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000006c RCX=0000000000000000 RDX=ffff8880145f3680 RSI=ffffffff8189ed8e RDI=0000000000000005 RBP=ffff888014587c48 RSP=ffff888014587998 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800b5cceb0 R13=0000000000000000 R14=ffff888014587c80 R15=0000000000000002 RIP=ffffffff814c089b 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 00007fb2be239900 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=00007fb2bd6608a0 CR3=000000000ce9a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=52f53a245866594200000000000ae988 XMM05=3f9ed76f242accbe00000000001330a0 XMM06=4fda316b135da52b0000000000131e90 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000