syzkaller login: [ 31.075727] BUG: Bad rss-counter state mm:00000000c90c157c type:MM_FILEPAGES val:33 [ 31.076962] BUG: Bad rss-counter state mm:00000000c90c157c type:MM_ANONPAGES val:22 [ 31.118639] ================================================================== [ 31.119722] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.120679] Read of size 8 at addr ffff888016d92228 by task sshd/221 [ 31.121411] [ 31.121620] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.122434] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.123349] Call Trace: [ 31.123652] [ 31.123926] dump_stack_lvl+0x91/0xf0 [ 31.124395] print_report+0xcc/0x620 [ 31.124873] ? __virt_addr_valid+0x102/0x340 [ 31.125393] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.126023] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.126736] kasan_report+0xbe/0xf0 [ 31.127207] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.127813] vma_interval_tree_remove+0xc75/0xec0 [ 31.128450] vma_prepare+0xc54/0x11a0 [ 31.129060] __split_vma+0x5af/0x950 [ 31.129534] ? __pfx___split_vma+0x10/0x10 [ 31.130082] ? find_held_lock+0x2c/0x110 [ 31.130634] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.131315] ? lock_is_held_type+0x9f/0x120 [ 31.131866] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.132527] ? mtree_range_walk+0x632/0x900 [ 31.133128] ? mas_walk+0x5c7/0x7c0 [ 31.133704] do_vmi_munmap+0x1f1/0x2b0 [ 31.134193] mmap_region+0x1f9/0x2660 [ 31.134713] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.135303] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.136076] ? __pfx_lock_acquire+0x10/0x10 [ 31.136612] ? __pfx_mmap_region+0x10/0x10 [ 31.137240] ? security_mmap_addr+0x7d/0xa0 [ 31.137848] ? get_unmapped_area+0x1f5/0x3f0 [ 31.138440] do_mmap+0x854/0xf00 [ 31.138886] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.139478] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.140048] ksys_mmap_pgoff+0x3af/0x500 [ 31.140563] do_syscall_64+0x3f/0x90 [ 31.141080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.141845] RIP: 0033:0x7f0dd675ad82 [ 31.142324] 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 [ 31.144635] RSP: 002b:00007ffe9d45b648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.145724] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0dd675ad82 [ 31.146700] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0dd5b94000 [ 31.147621] RBP: 00007f0dd5b94000 R08: 0000000000000009 R09: 0000000000001000 [ 31.148569] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556e882f6b20 [ 31.149516] R13: 00007ffe9d45b660 R14: 00007ffe9d45b690 R15: 00007ffe9d45b9f0 [ 31.150470] [ 31.150785] [ 31.150999] Allocated by task 214: [ 31.151427] kasan_save_stack+0x22/0x50 [ 31.151933] kasan_set_track+0x25/0x30 [ 31.152421] __kasan_slab_alloc+0x59/0x70 [ 31.153070] kmem_cache_alloc+0x16b/0x370 [ 31.153598] vm_area_dup+0x20/0x160 [ 31.154053] __split_vma+0x170/0x950 [ 31.154513] split_vma+0xc6/0x110 [ 31.155038] mprotect_fixup+0x8d2/0xb30 [ 31.155579] do_mprotect_pkey+0x87e/0xd40 [ 31.156148] __x64_sys_mprotect+0x78/0xc0 [ 31.156685] do_syscall_64+0x3f/0x90 [ 31.157231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.157943] [ 31.158199] Freed by task 214: [ 31.158601] kasan_save_stack+0x22/0x50 [ 31.159163] kasan_set_track+0x25/0x30 [ 31.159699] kasan_save_free_info+0x2b/0x50 [ 31.160237] __kasan_slab_free+0x10a/0x190 [ 31.160802] kmem_cache_free+0x10d/0x4d0 [ 31.161338] rcu_core+0x8c8/0x2860 [ 31.161875] __do_softirq+0x1b7/0x7d4 [ 31.162352] [ 31.162568] Last potentially related work creation: [ 31.163159] kasan_save_stack+0x22/0x50 [ 31.163748] __kasan_record_aux_stack+0x8e/0xa0 [ 31.164361] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.165074] remove_vma+0x139/0x170 [ 31.165523] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.166185] do_vmi_munmap+0x1f1/0x2b0 [ 31.166682] __vm_munmap+0x138/0x3a0 [ 31.167157] __x64_sys_munmap+0x59/0x80 [ 31.167647] do_syscall_64+0x3f/0x90 [ 31.168232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.168904] [ 31.169117] The buggy address belongs to the object at ffff888016d921d0 [ 31.169117] which belongs to the cache vm_area_struct of size 168 [ 31.170708] The buggy address is located 88 bytes inside of [ 31.170708] freed 168-byte region [ffff888016d921d0, ffff888016d92278) [ 31.172139] [ 31.172405] The buggy address belongs to the physical page: [ 31.173158] page:0000000074ae4a13 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d92 [ 31.174337] memcg:ffff888016653401 [ 31.174856] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.175501] page_type: 0xffffffff() [ 31.175950] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a7ac0 dead000000000004 [ 31.176978] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016653401 [ 31.177886] page dumped because: kasan: bad access detected [ 31.178557] [ 31.178773] Memory state around the buggy address: [ 31.179463] ffff888016d92100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.180368] ffff888016d92180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.181346] >ffff888016d92200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.182243] ^ [ 31.182801] ffff888016d92280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.183782] ffff888016d92300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.184716] ================================================================== [ 31.185848] Disabling lock debugging due to kernel taint [ 33.084584] BUG: Bad rss-counter state mm:000000000db6258f type:MM_FILEPAGES val:33 [ 33.086039] BUG: Bad rss-counter state mm:000000000db6258f type:MM_ANONPAGES val:22 [ 33.594817] BUG: Bad rss-counter state mm:00000000d44fc1ad type:MM_FILEPAGES val:33 [ 33.595819] BUG: Bad rss-counter state mm:00000000d44fc1ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26314' (ECDSA) to the list of known hosts. 2023/06/21 03:45:20 fuzzer started 2023/06/21 03:45:20 dialing manager at localhost:36067 2023/06/21 03:45:20 checking machine... 2023/06/21 03:45:20 checking revisions... [ 34.367483] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:45:21 testing simple program... [ 34.418907] cgroup: Unknown subsys name 'net' [ 34.457673] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:45:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff860d2fdc RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888008d9f9d0 RSP=ffff888008d9f908 R8 =ffffffff860d2fe0 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=000000000000fdcc R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9fd48 R15=ffff888008d9f978 RIP=ffffffff81130bb0 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 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=00007f4310a5f220 CR3=000000000ef58000 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=2030323a35343a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a35343a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801a0b85f0 RCX=ffff88800844f780 RDX=ffffea0000682d40 RSI=ffff88801a0b8000 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88800f7b7c78 R8 =ffff88801a0b5e40 R9 =0000000000000000 R10=ffffea0000682e00 R11=00000000000d0009 R12=dffffc0000000000 R13=ffff88800f7b7cb8 R14=ffff88800844f780 R15=ffff88801a0b8000 RIP=ffffffff81810316 RFL=00000202 [-------] 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 00007f0f0b548900 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=00007ffd5228b000 CR3=000000000f064000 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