syzkaller login: [ 31.955509] BUG: Bad rss-counter state mm:000000002639d424 type:MM_FILEPAGES val:33 [ 31.956952] BUG: Bad rss-counter state mm:000000002639d424 type:MM_ANONPAGES val:22 [ 32.112390] ================================================================== [ 32.113386] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.114381] Read of size 8 at addr ffff88801674f4e0 by task sshd/220 [ 32.115293] [ 32.115526] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.116436] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.117489] Call Trace: [ 32.117824] [ 32.118127] dump_stack_lvl+0x91/0xf0 [ 32.118642] print_report+0xcc/0x620 [ 32.119162] ? __virt_addr_valid+0x102/0x340 [ 32.119743] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.120405] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.121069] kasan_report+0xbe/0xf0 [ 32.121582] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.122262] vma_interval_tree_remove+0xc75/0xec0 [ 32.122926] vma_prepare+0xc54/0x11a0 [ 32.123454] __split_vma+0x5af/0x950 [ 32.123973] ? __pfx___split_vma+0x10/0x10 [ 32.124563] ? find_held_lock+0x2c/0x110 [ 32.125151] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.125770] ? lock_is_held_type+0x9f/0x120 [ 32.126361] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.127024] ? mtree_range_walk+0x632/0x900 [ 32.127636] ? mas_walk+0x5c7/0x7c0 [ 32.128151] do_vmi_munmap+0x1f1/0x2b0 [ 32.128688] mmap_region+0x1f9/0x2660 [ 32.129229] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.129778] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.130536] ? __pfx_lock_acquire+0x10/0x10 [ 32.131102] ? __pfx_mmap_region+0x10/0x10 [ 32.131658] ? security_mmap_addr+0x7d/0xa0 [ 32.132217] ? get_unmapped_area+0x1f5/0x3f0 [ 32.132812] do_mmap+0x854/0xf00 [ 32.133288] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.133820] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.134416] ksys_mmap_pgoff+0x3af/0x500 [ 32.134959] do_syscall_64+0x3f/0x90 [ 32.135469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.136148] RIP: 0033:0x7f46f6ee5d82 [ 32.136635] 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 [ 32.138887] RSP: 002b:00007ffe92cd6cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.139844] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f46f6ee5d82 [ 32.140744] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f46f631f000 [ 32.141662] RBP: 00007f46f631f000 R08: 0000000000000009 R09: 0000000000001000 [ 32.142553] R10: 0000000000000812 R11: 0000000000000206 R12: 000056289259cec0 [ 32.143444] R13: 00007ffe92cd6cf0 R14: 00007ffe92cd6d20 R15: 00007ffe92cd7080 [ 32.144354] [ 32.144660] [ 32.144904] Allocated by task 213: [ 32.145360] kasan_save_stack+0x22/0x50 [ 32.145904] kasan_set_track+0x25/0x30 [ 32.146432] __kasan_slab_alloc+0x59/0x70 [ 32.147000] kmem_cache_alloc+0x16b/0x370 [ 32.147549] vm_area_dup+0x20/0x160 [ 32.148034] __split_vma+0x170/0x950 [ 32.148525] split_vma+0xc6/0x110 [ 32.148997] mprotect_fixup+0x8d2/0xb30 [ 32.149534] do_mprotect_pkey+0x87e/0xd40 [ 32.150085] __x64_sys_mprotect+0x78/0xc0 [ 32.150640] do_syscall_64+0x3f/0x90 [ 32.151151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.151836] [ 32.152068] Freed by task 213: [ 32.152481] kasan_save_stack+0x22/0x50 [ 32.153038] kasan_set_track+0x25/0x30 [ 32.153562] kasan_save_free_info+0x2b/0x50 [ 32.154133] __kasan_slab_free+0x10a/0x190 [ 32.154702] kmem_cache_free+0x10d/0x4d0 [ 32.155248] rcu_core+0x8c8/0x2860 [ 32.155717] __do_softirq+0x1b7/0x7d4 [ 32.156223] [ 32.156454] Last potentially related work creation: [ 32.157078] kasan_save_stack+0x22/0x50 [ 32.157615] __kasan_record_aux_stack+0x8e/0xa0 [ 32.158226] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.158911] remove_vma+0x139/0x170 [ 32.159389] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.159978] do_vmi_munmap+0x1f1/0x2b0 [ 32.160489] __vm_munmap+0x138/0x3a0 [ 32.160995] __x64_sys_munmap+0x59/0x80 [ 32.161518] do_syscall_64+0x3f/0x90 [ 32.162029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.162712] [ 32.162941] The buggy address belongs to the object at ffff88801674f488 [ 32.162941] which belongs to the cache vm_area_struct of size 168 [ 32.164502] The buggy address is located 88 bytes inside of [ 32.164502] freed 168-byte region [ffff88801674f488, ffff88801674f530) [ 32.166001] [ 32.166235] The buggy address belongs to the physical page: [ 32.166938] page:00000000cde57158 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1674f [ 32.168096] memcg:ffff88800ed87201 [ 32.168551] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.169247] page_type: 0xffffffff() [ 32.169726] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.170695] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed87201 [ 32.171656] page dumped because: kasan: bad access detected [ 32.172349] [ 32.172577] Memory state around the buggy address: [ 32.173223] ffff88801674f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.174121] ffff88801674f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.175034] >ffff88801674f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.175943] ^ [ 32.176742] ffff88801674f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.177661] ffff88801674f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.178562] ================================================================== [ 32.179722] Disabling lock debugging due to kernel taint [ 34.582418] BUG: Bad rss-counter state mm:00000000c3c448b4 type:MM_FILEPAGES val:33 [ 34.583575] BUG: Bad rss-counter state mm:00000000c3c448b4 type:MM_ANONPAGES val:22 [ 34.980624] BUG: Bad rss-counter state mm:0000000076e1ee9f type:MM_FILEPAGES val:33 [ 34.981705] BUG: Bad rss-counter state mm:0000000076e1ee9f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47679' (ECDSA) to the list of known hosts. 2023/06/19 13:50:31 fuzzer started 2023/06/19 13:50:32 dialing manager at localhost:44161 2023/06/19 13:50:32 checking machine... 2023/06/19 13:50:32 checking revisions... [ 35.702979] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:50:32 testing simple program... [ 35.746555] cgroup: Unknown subsys name 'net' [ 35.795716] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:50:30 Registers: info registers vcpu 0 RAX=ffff88800e39bc48 RBX=ffff88800fe788b8 RCX=1ffff11001fcf05b RDX=dffffc0000000000 RSI=ffffffff87b86f80 RDI=ffff88800fe782d8 RBP=ffff88800edccbe0 RSP=ffff88806ce09d98 R8 =0000000000000001 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=0000000000000000 R12=0000000000000287 R13=ffff88800edccc48 R14=ffff88800fe782c8 R15=ffffffff87b86f80 RIP=ffffffff844cc243 RFL=00000046 [---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=00007fb735370cc0 CR3=000000000c736000 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=28db671d1af370a04043a458690af773 XMM02=000000000011c870eff9b2d0a8fce9cb XMM03=000000000011c9402c67c8bc2e329bc3 XMM04=f507285868048dd500000000000ae988 XMM05=19e9129bd510f2350000000000133908 XMM06=4fda316b135da52b0000000000133790 XMM07=e042d86d42eb936e0000000000124020 XMM08=b98dd2bcb6fcaa2a000000000011c940 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888019a73680 RBX=ffff88800f9cf790 RCX=ffffffff81132ffe RDX=ffff88800f9cf6a8 RSI=0000000000000000 RDI=ffff88800f9cf768 RBP=ffff888019a73680 RSP=ffff88800f9cf6a8 R8 =ffff88800ebc2000 R9 =0000000000000000 R10=ffff88800f9cf6f8 R11=ffffffff81806df1 R12=0000000000000000 R13=ffff88800f9cf720 R14=ffff88800f9cf740 R15=ffff88800f9cf6f8 RIP=ffffffff81133010 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 00007f6b0b17c900 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=00007ffcc0997000 CR3=000000000e754000 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