syzkaller login: [ 162.504101] BUG: Bad rss-counter state mm:000000003c5170b8 type:MM_FILEPAGES val:33 [ 162.505287] BUG: Bad rss-counter state mm:000000003c5170b8 type:MM_ANONPAGES val:22 [ 162.540545] ================================================================== [ 162.541189] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 162.541860] Read of size 8 at addr ffff88800f059ed8 by task sshd/228 [ 162.542410] [ 162.542566] CPU: 0 PID: 228 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 162.543313] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 162.544100] Call Trace: [ 162.544333] [ 162.544539] dump_stack_lvl+0x91/0xf0 [ 162.544899] print_report+0xcc/0x620 [ 162.545254] ? __virt_addr_valid+0x102/0x340 [ 162.545658] ? vma_interval_tree_remove+0xc75/0xec0 [ 162.546116] ? vma_interval_tree_remove+0xc75/0xec0 [ 162.546565] kasan_report+0xbe/0xf0 [ 162.546902] ? vma_interval_tree_remove+0xc75/0xec0 [ 162.547365] vma_interval_tree_remove+0xc75/0xec0 [ 162.547797] vma_prepare+0xc54/0x11a0 [ 162.548143] __split_vma+0x5af/0x950 [ 162.548480] ? __pfx___split_vma+0x10/0x10 [ 162.548854] ? find_held_lock+0x2c/0x110 [ 162.549221] do_vmi_align_munmap+0x2ba/0x11f0 [ 162.549619] ? lock_is_held_type+0x9f/0x120 [ 162.550001] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 162.550433] ? mtree_range_walk+0x632/0x900 [ 162.550824] ? mas_walk+0x5c7/0x7c0 [ 162.551154] do_vmi_munmap+0x1f1/0x2b0 [ 162.551505] mmap_region+0x1f9/0x2660 [ 162.551847] ? vm_mmap_pgoff+0x15c/0x3a0 [ 162.552211] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 162.552726] ? __pfx_lock_acquire+0x10/0x10 [ 162.553099] ? __pfx_mmap_region+0x10/0x10 [ 162.553478] ? security_mmap_addr+0x7d/0xa0 [ 162.553856] ? get_unmapped_area+0x1f5/0x3f0 [ 162.554244] do_mmap+0x854/0xf00 [ 162.554556] vm_mmap_pgoff+0x1a6/0x3a0 [ 162.554910] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 162.555318] ksys_mmap_pgoff+0x3af/0x500 [ 162.555689] do_syscall_64+0x3f/0x90 [ 162.556031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 162.556490] RIP: 0033:0x7fefb522fd82 [ 162.556812] 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 [ 162.558326] RSP: 002b:00007ffe840f0a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 162.558969] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fefb522fd82 [ 162.559584] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fefb4669000 [ 162.560189] RBP: 00007fefb4669000 R08: 0000000000000009 R09: 0000000000001000 [ 162.560824] R10: 0000000000000812 R11: 0000000000000206 R12: 00005633f536bd90 [ 162.561458] R13: 00007ffe840f0a80 R14: 00007ffe840f0ab0 R15: 00007ffe840f0e10 [ 162.562146] [ 162.562359] [ 162.562513] Allocated by task 221: [ 162.562815] kasan_save_stack+0x22/0x50 [ 162.563176] kasan_set_track+0x25/0x30 [ 162.563530] __kasan_slab_alloc+0x59/0x70 [ 162.563899] kmem_cache_alloc+0x16b/0x370 [ 162.564266] vm_area_dup+0x20/0x160 [ 162.564586] __split_vma+0x170/0x950 [ 162.564921] split_vma+0xc6/0x110 [ 162.565229] mprotect_fixup+0x8d2/0xb30 [ 162.565581] do_mprotect_pkey+0x87e/0xd40 [ 162.565954] __x64_sys_mprotect+0x78/0xc0 [ 162.566323] do_syscall_64+0x3f/0x90 [ 162.566665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 162.567124] [ 162.567384] Freed by task 221: [ 162.567895] kasan_save_stack+0x22/0x50 [ 162.568538] kasan_set_track+0x25/0x30 [ 162.569151] kasan_save_free_info+0x2b/0x50 [ 162.569821] __kasan_slab_free+0x10a/0x190 [ 162.570505] kmem_cache_free+0x10d/0x4d0 [ 162.571148] rcu_core+0x8c8/0x2860 [ 162.571778] __do_softirq+0x1b7/0x7d4 [ 162.572370] [ 162.572599] Last potentially related work creation: [ 162.573236] kasan_save_stack+0x22/0x50 [ 162.573775] __kasan_record_aux_stack+0x8e/0xa0 [ 162.574395] __call_rcu_common.constprop.0+0x6a/0xb90 [ 162.575087] remove_vma+0x139/0x170 [ 162.575594] do_vmi_align_munmap+0xd4a/0x11f0 [ 162.576204] do_vmi_munmap+0x1f1/0x2b0 [ 162.576728] __vm_munmap+0x138/0x3a0 [ 162.577237] __x64_sys_munmap+0x59/0x80 [ 162.577781] do_syscall_64+0x3f/0x90 [ 162.578291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 162.578996] [ 162.579235] Second to last potentially related work creation: [ 162.579968] kasan_save_stack+0x22/0x50 [ 162.580510] __kasan_record_aux_stack+0x8e/0xa0 [ 162.581130] __call_rcu_common.constprop.0+0x6a/0xb90 [ 162.581828] remove_vma+0x139/0x170 [ 162.582317] do_vmi_align_munmap+0xd4a/0x11f0 [ 162.582920] do_vmi_munmap+0x1f1/0x2b0 [ 162.583470] mmap_region+0x1f9/0x2660 [ 162.583992] do_mmap+0x854/0xf00 [ 162.584464] vm_mmap_pgoff+0x1a6/0x3a0 [ 162.584997] ksys_mmap_pgoff+0x3af/0x500 [ 162.585534] do_syscall_64+0x3f/0x90 [ 162.586046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 162.586735] [ 162.586967] The buggy address belongs to the object at ffff88800f059e80 [ 162.586967] which belongs to the cache vm_area_struct of size 168 [ 162.588581] The buggy address is located 88 bytes inside of [ 162.588581] freed 168-byte region [ffff88800f059e80, ffff88800f059f28) [ 162.590116] [ 162.590354] The buggy address belongs to the physical page: [ 162.591076] page:00000000723b8a70 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf059 [ 162.592254] memcg:ffff88800ece1c01 [ 162.592709] flags: 0x100000000000200(slab|node=0|zone=1) [ 162.593401] page_type: 0xffffffff() [ 162.593888] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 162.594876] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ece1c01 [ 162.595866] page dumped because: kasan: bad access detected [ 162.596581] [ 162.596810] Memory state around the buggy address: [ 162.597435] ffff88800f059d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 162.598351] ffff88800f059e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 162.599287] >ffff88800f059e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 162.600228] ^ [ 162.601035] ffff88800f059f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 162.601978] ffff88800f059f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 162.602918] ================================================================== [ 162.604174] Disabling lock debugging due to kernel taint [ 165.132760] BUG: Bad rss-counter state mm:00000000a4b1f760 type:MM_FILEPAGES val:33 [ 165.133767] BUG: Bad rss-counter state mm:00000000a4b1f760 type:MM_ANONPAGES val:22 [ 165.597582] BUG: Bad rss-counter state mm:00000000bcf4feea type:MM_FILEPAGES val:33 [ 165.598883] BUG: Bad rss-counter state mm:00000000bcf4feea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37865' (ECDSA) to the list of known hosts. 2023/06/19 12:38:02 fuzzer started 2023/06/19 12:38:03 dialing manager at localhost:44161 2023/06/19 12:38:03 checking machine... 2023/06/19 12:38:03 checking revisions... [ 166.307838] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:38:03 testing simple program... [ 166.354996] cgroup: Unknown subsys name 'net' [ 166.449003] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:36:28 Registers: info registers vcpu 0 RAX=1ffff11001c02f43 RBX=ffff88800e0179e8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e017a18 RBP=ffff888015fd4ae0 RSP=ffff888008d7fc98 R8 =0000000000000001 R9 =ffffed10011aff87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888015fd0540 R14=ffffffff818d9dc6 R15=ffff88800f325600 RIP=ffffffff81846362 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=00007fc56969d0b0 CR3=000000001027c000 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=38333a3231203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3833325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323734 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888008d751c0 RBX=ffff88806cf09b30 RCX=ffffffff81132ffe RDX=ffff88806cf09a48 RSI=0000000000000000 RDI=ffff88806cf09b08 RBP=ffff888008d751c0 RSP=ffff88806cf09a48 R8 =0000000000000004 R9 =0000000000000000 R10=ffff88806cf09a98 R11=0000000000000000 R12=0000000000000000 R13=ffff88806cf09ac0 R14=ffff88806cf09ae0 R15=ffff88806cf09a98 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 0000000000000000 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=00007f6639545b30 CR3=0000000014272000 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=00000000000000000000000000000000 XMM01=0ca33512e3eda9a6dd4153e1f9be7063 XMM02=00000000001292d8ec2efd57dc4c00df XMM03=0000000000130ce8e5bbd7a9ae7f0f23 XMM04=19800bcf356035c500000000000ae988 XMM05=0b39c798a71319b60000000000141ed8 XMM06=8fede82a5ad58cbe0000000000141d60 XMM07=e042d86d42eb936e0000000000130f68 XMM08=e5bbd7a9ae7f0f230000000000129338 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000