syzkaller login: [ 30.419874] BUG: Bad rss-counter state mm:000000006772ed4a type:MM_FILEPAGES val:33 [ 30.421072] BUG: Bad rss-counter state mm:000000006772ed4a type:MM_ANONPAGES val:22 [ 30.465680] ================================================================== [ 30.466630] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.467564] Read of size 8 at addr ffff88801398a4e0 by task sshd/220 [ 30.468359] [ 30.468583] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.469647] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.470720] Call Trace: [ 30.471070] [ 30.471393] dump_stack_lvl+0x91/0xf0 [ 30.471924] print_report+0xcc/0x620 [ 30.472470] ? __virt_addr_valid+0x102/0x340 [ 30.473141] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.473849] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.474546] kasan_report+0xbe/0xf0 [ 30.475086] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.475801] vma_interval_tree_remove+0xc75/0xec0 [ 30.476461] vma_prepare+0xc54/0x11a0 [ 30.476988] __split_vma+0x5af/0x950 [ 30.477553] ? __pfx___split_vma+0x10/0x10 [ 30.478183] ? find_held_lock+0x2c/0x110 [ 30.478796] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.479451] ? lock_is_held_type+0x9f/0x120 [ 30.480099] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.480807] ? mtree_range_walk+0x632/0x900 [ 30.481452] ? mas_walk+0x5c7/0x7c0 [ 30.482002] do_vmi_munmap+0x1f1/0x2b0 [ 30.482606] mmap_region+0x1f9/0x2660 [ 30.483166] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.483778] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.484592] ? __pfx_lock_acquire+0x10/0x10 [ 30.485181] ? __pfx_mmap_region+0x10/0x10 [ 30.485763] ? security_mmap_addr+0x7d/0xa0 [ 30.486333] ? get_unmapped_area+0x1f5/0x3f0 [ 30.486963] do_mmap+0x854/0xf00 [ 30.487450] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.487987] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.488607] ksys_mmap_pgoff+0x3af/0x500 [ 30.489157] do_syscall_64+0x3f/0x90 [ 30.489693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.490424] RIP: 0033:0x7fae41427d82 [ 30.490950] 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 [ 30.493353] RSP: 002b:00007ffeef097108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.494371] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fae41427d82 [ 30.495331] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fae40861000 [ 30.496284] RBP: 00007fae40861000 R08: 0000000000000009 R09: 0000000000001000 [ 30.497238] R10: 0000000000000812 R11: 0000000000000206 R12: 000055916fd22ec0 [ 30.498196] R13: 00007ffeef097120 R14: 00007ffeef097150 R15: 00007ffeef0974b0 [ 30.499168] [ 30.499498] [ 30.499740] Allocated by task 213: [ 30.500225] kasan_save_stack+0x22/0x50 [ 30.500786] kasan_set_track+0x25/0x30 [ 30.501330] __kasan_slab_alloc+0x59/0x70 [ 30.501905] kmem_cache_alloc+0x16b/0x370 [ 30.502489] vm_area_dup+0x20/0x160 [ 30.503006] __split_vma+0x170/0x950 [ 30.503529] split_vma+0xc6/0x110 [ 30.504014] mprotect_fixup+0x8d2/0xb30 [ 30.504577] do_mprotect_pkey+0x87e/0xd40 [ 30.505158] __x64_sys_mprotect+0x78/0xc0 [ 30.505742] do_syscall_64+0x3f/0x90 [ 30.506272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.507021] [ 30.507264] Freed by task 213: [ 30.507697] kasan_save_stack+0x22/0x50 [ 30.508260] kasan_set_track+0x25/0x30 [ 30.508823] kasan_save_free_info+0x2b/0x50 [ 30.509422] __kasan_slab_free+0x10a/0x190 [ 30.510020] kmem_cache_free+0x10d/0x4d0 [ 30.510658] rcu_core+0x8c8/0x2860 [ 30.511164] __do_softirq+0x1b7/0x7d4 [ 30.511706] [ 30.511944] Last potentially related work creation: [ 30.512604] kasan_save_stack+0x22/0x50 [ 30.513165] __kasan_record_aux_stack+0x8e/0xa0 [ 30.513804] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.514545] remove_vma+0x139/0x170 [ 30.515059] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.515688] do_vmi_munmap+0x1f1/0x2b0 [ 30.516239] __vm_munmap+0x138/0x3a0 [ 30.516763] __x64_sys_munmap+0x59/0x80 [ 30.517317] do_syscall_64+0x3f/0x90 [ 30.517854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.518592] [ 30.518833] The buggy address belongs to the object at ffff88801398a488 [ 30.518833] which belongs to the cache vm_area_struct of size 168 [ 30.520501] The buggy address is located 88 bytes inside of [ 30.520501] freed 168-byte region [ffff88801398a488, ffff88801398a530) [ 30.522167] [ 30.522422] The buggy address belongs to the physical page: [ 30.523223] page:000000008ebd7b62 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1398a [ 30.524518] memcg:ffff88800fd34101 [ 30.525014] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.525762] page_type: 0xffffffff() [ 30.526297] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.527380] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd34101 [ 30.528421] page dumped because: kasan: bad access detected [ 30.529158] [ 30.529393] Memory state around the buggy address: [ 30.530053] ffff88801398a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.531021] ffff88801398a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.531973] >ffff88801398a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.532904] ^ [ 30.533726] ffff88801398a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.534678] ffff88801398a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.535616] ================================================================== [ 30.536744] Disabling lock debugging due to kernel taint [ 32.581329] BUG: Bad rss-counter state mm:00000000a8df900b type:MM_FILEPAGES val:33 [ 32.582892] BUG: Bad rss-counter state mm:00000000a8df900b type:MM_ANONPAGES val:22 [ 33.039768] BUG: Bad rss-counter state mm:00000000a1e31d71 type:MM_FILEPAGES val:33 [ 33.040848] BUG: Bad rss-counter state mm:00000000a1e31d71 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4531' (ECDSA) to the list of known hosts. 2023/06/20 11:19:02 fuzzer started 2023/06/20 11:19:02 dialing manager at localhost:36067 2023/06/20 11:19:02 checking machine... 2023/06/20 11:19:02 checking revisions... [ 33.739720] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:19:02 testing simple program... [ 33.786106] cgroup: Unknown subsys name 'net' [ 33.842422] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:19:02 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff836827d9 RCX=0000000000000001 RDX=1ffff11002065eaf RSI=ffff88801032f970 RDI=ffffffff836827d9 RBP=ffffffff836827d9 RSP=ffff88801032f4c8 R8 =0000000000000001 R9 =ffff88801032f560 R10=0000000000038001 R11=000000000008b7d7 R12=ffff88801032f5e8 R13=0000000000000000 R14=ffff888014651b40 R15=ffff88800f0ed280 RIP=ffffffff811fc6f7 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 00007fe1d8ab7900 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=00007fe1d7edda10 CR3=000000000c636000 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=8afee433189e088e034d0b8bec6d03f8 XMM02=ec2efd57dc4c00df000000000011b2c8 XMM03=880e0f8b60698f6d000000000011b398 XMM04=84b07c0cafec0aba00000000000ae988 XMM05=792db8e5932498e20000000000133038 XMM06=e4cb8bb95a7664b60000000000131ef0 XMM07=fb795ef6d65770560000000000121e48 XMM08=2c67c8bc2e329bc3000000000011b338 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff852ca440 RCX=ffffffff81eeb37e RDX=ffff88800bb21b40 RSI=0000000000000000 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff888019417758 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88800f88cdc0 R14=ffff888019552000 R15=ffff888019552504 RIP=ffffffff814c0864 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 00007f288c0d3900 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=00007ffe5faf9000 CR3=000000000c9da000 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