syzkaller login: [ 31.183780] sshd (212) used greatest stack depth: 24128 bytes left [ 31.184811] BUG: Bad rss-counter state mm:00000000639f2c49 type:MM_FILEPAGES val:33 [ 31.185911] BUG: Bad rss-counter state mm:00000000639f2c49 type:MM_ANONPAGES val:22 [ 31.341857] ================================================================== [ 31.342764] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.343706] Read of size 8 at addr ffff888019cd8310 by task sshd/219 [ 31.344472] [ 31.344690] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.345717] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.346699] Call Trace: [ 31.347022] [ 31.347310] dump_stack_lvl+0x91/0xf0 [ 31.347826] print_report+0xcc/0x620 [ 31.348313] ? __virt_addr_valid+0x102/0x340 [ 31.348867] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.349487] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.350114] kasan_report+0xbe/0xf0 [ 31.350594] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.351206] vma_interval_tree_remove+0xc75/0xec0 [ 31.351802] vma_prepare+0xc54/0x11a0 [ 31.352275] __split_vma+0x5af/0x950 [ 31.352743] ? __pfx___split_vma+0x10/0x10 [ 31.353266] ? find_held_lock+0x2c/0x110 [ 31.353790] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.354365] ? lock_is_held_type+0x9f/0x120 [ 31.354907] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.355509] ? mtree_range_walk+0x632/0x900 [ 31.356056] ? mas_walk+0x5c7/0x7c0 [ 31.356530] do_vmi_munmap+0x1f1/0x2b0 [ 31.357022] mmap_region+0x1f9/0x2660 [ 31.357500] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.358035] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.358750] ? __pfx_lock_acquire+0x10/0x10 [ 31.359286] ? __pfx_mmap_region+0x10/0x10 [ 31.359810] ? security_mmap_addr+0x7d/0xa0 [ 31.360339] ? get_unmapped_area+0x1f5/0x3f0 [ 31.360888] do_mmap+0x854/0xf00 [ 31.361326] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.361817] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.362383] ksys_mmap_pgoff+0x3af/0x500 [ 31.362896] do_syscall_64+0x3f/0x90 [ 31.363375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.364027] RIP: 0033:0x7f5ec0687d82 [ 31.364484] 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 [ 31.366614] RSP: 002b:00007ffeedc5d938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.367509] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5ec0687d82 [ 31.368352] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5ebfac1000 [ 31.369193] RBP: 00007f5ebfac1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.370054] R10: 0000000000000812 R11: 0000000000000206 R12: 00005576afd83f70 [ 31.370901] R13: 00007ffeedc5d950 R14: 00007ffeedc5d980 R15: 00007ffeedc5dce0 [ 31.371774] [ 31.372068] [ 31.372285] Allocated by task 212: [ 31.372720] kasan_save_stack+0x22/0x50 [ 31.373236] kasan_set_track+0x25/0x30 [ 31.373731] __kasan_slab_alloc+0x59/0x70 [ 31.374272] kmem_cache_alloc+0x16b/0x370 [ 31.374801] vm_area_dup+0x20/0x160 [ 31.375256] __split_vma+0x170/0x950 [ 31.375719] split_vma+0xc6/0x110 [ 31.376163] mprotect_fixup+0x8d2/0xb30 [ 31.376669] do_mprotect_pkey+0x87e/0xd40 [ 31.377184] __x64_sys_mprotect+0x78/0xc0 [ 31.377700] do_syscall_64+0x3f/0x90 [ 31.378190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.378832] [ 31.379050] Freed by task 212: [ 31.379438] kasan_save_stack+0x22/0x50 [ 31.379943] kasan_set_track+0x25/0x30 [ 31.380436] kasan_save_free_info+0x2b/0x50 [ 31.380967] __kasan_slab_free+0x10a/0x190 [ 31.381494] kmem_cache_free+0x10d/0x4d0 [ 31.382007] rcu_core+0x8c8/0x2860 [ 31.382450] __do_softirq+0x1b7/0x7d4 [ 31.382930] [ 31.383145] Last potentially related work creation: [ 31.383724] kasan_save_stack+0x22/0x50 [ 31.384221] __kasan_record_aux_stack+0x8e/0xa0 [ 31.384793] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.385431] remove_vma+0x139/0x170 [ 31.385887] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.386563] do_vmi_munmap+0x1f1/0x2b0 [ 31.387046] __vm_munmap+0x138/0x3a0 [ 31.387510] __x64_sys_munmap+0x59/0x80 [ 31.388009] do_syscall_64+0x3f/0x90 [ 31.388480] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.389127] [ 31.389345] The buggy address belongs to the object at ffff888019cd82b8 [ 31.389345] which belongs to the cache vm_area_struct of size 168 [ 31.390822] The buggy address is located 88 bytes inside of [ 31.390822] freed 168-byte region [ffff888019cd82b8, ffff888019cd8360) [ 31.392212] [ 31.392428] The buggy address belongs to the physical page: [ 31.393084] page:0000000045ae73fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cd8 [ 31.394184] memcg:ffff888015ce0c01 [ 31.394609] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.395253] page_type: 0xffffffff() [ 31.395698] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.396610] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ce0c01 [ 31.397507] page dumped because: kasan: bad access detected [ 31.398190] [ 31.398407] Memory state around the buggy address: [ 31.398985] ffff888019cd8200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.399835] ffff888019cd8280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.400680] >ffff888019cd8300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.401532] ^ [ 31.402004] ffff888019cd8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.402864] ffff888019cd8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.403728] ================================================================== [ 31.404652] Disabling lock debugging due to kernel taint [ 33.712431] BUG: Bad rss-counter state mm:00000000e60c24e0 type:MM_FILEPAGES val:33 [ 33.713636] BUG: Bad rss-counter state mm:00000000e60c24e0 type:MM_ANONPAGES val:22 [ 34.123960] BUG: Bad rss-counter state mm:00000000c51bf2f5 type:MM_FILEPAGES val:33 [ 34.125135] BUG: Bad rss-counter state mm:00000000c51bf2f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16671' (ECDSA) to the list of known hosts. 2023/06/20 21:26:49 fuzzer started 2023/06/20 21:26:49 dialing manager at localhost:36067 2023/06/20 21:26:49 checking machine... 2023/06/20 21:26:49 checking revisions... [ 34.829967] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:26:49 testing simple program... [ 34.869001] cgroup: Unknown subsys name 'net' [ 34.917784] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:26:49 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffffffff86607dd4 RCX=0000000080000101 RDX=ffffffff8542a6c0 RSI=ffffffff81007b6c RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88806ce09a18 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b54e7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800f1a4d90 RIP=ffffffff814c0871 RFL=00000297 [--S-APC] 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=00007ffd1dec3fd8 CR3=0000000005482000 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=00007fd425b415100000557691fe3790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801b97dc00 RBX=ffff888015fecd78 RCX=1ffff11001ed0086 RDX=dffffc0000000000 RSI=ffff88801ba715e8 RDI=ffff888015fecda8 RBP=ffff88800f680400 RSP=ffff8880176afa78 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88801ba71500 R13=0000000000000000 R14=ffff8880094edc28 R15=ffff8880094edbe0 RIP=ffffffff81847688 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 00007fc296392900 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=00007ffe3adc7000 CR3=000000000c55a000 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