syzkaller login: [ 30.473992] BUG: Bad rss-counter state mm:000000001005854a type:MM_FILEPAGES val:33 [ 30.475224] BUG: Bad rss-counter state mm:000000001005854a type:MM_ANONPAGES val:22 [ 30.637356] ================================================================== [ 30.638438] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.639753] Read of size 8 at addr ffff888018cb5ed8 by task sshd/219 [ 30.640703] [ 30.640965] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.641942] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.642931] Call Trace: [ 30.643254] [ 30.643538] dump_stack_lvl+0x91/0xf0 [ 30.644033] print_report+0xcc/0x620 [ 30.644522] ? __virt_addr_valid+0x102/0x340 [ 30.645098] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.645711] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.646325] kasan_report+0xbe/0xf0 [ 30.646795] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.647423] vma_interval_tree_remove+0xc75/0xec0 [ 30.648024] vma_prepare+0xc54/0x11a0 [ 30.648520] __split_vma+0x5af/0x950 [ 30.649007] ? __pfx___split_vma+0x10/0x10 [ 30.649536] ? find_held_lock+0x2c/0x110 [ 30.650066] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.650638] ? lock_is_held_type+0x9f/0x120 [ 30.651190] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.651797] ? mtree_range_walk+0x632/0x900 [ 30.652349] ? mas_walk+0x5c7/0x7c0 [ 30.652849] do_vmi_munmap+0x1f1/0x2b0 [ 30.653346] mmap_region+0x1f9/0x2660 [ 30.653831] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.654357] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.655081] ? __pfx_lock_acquire+0x10/0x10 [ 30.655618] ? __pfx_mmap_region+0x10/0x10 [ 30.656148] ? security_mmap_addr+0x7d/0xa0 [ 30.656700] ? get_unmapped_area+0x1f5/0x3f0 [ 30.657252] do_mmap+0x854/0xf00 [ 30.657696] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.658193] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.658764] ksys_mmap_pgoff+0x3af/0x500 [ 30.659274] do_syscall_64+0x3f/0x90 [ 30.659760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.660414] RIP: 0033:0x7f9e30d52d82 [ 30.660888] 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 [ 30.663029] RSP: 002b:00007ffd16e32aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.663941] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9e30d52d82 [ 30.664819] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9e3018c000 [ 30.665669] RBP: 00007f9e3018c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.666522] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a2220ff70 [ 30.667374] R13: 00007ffd16e32ac0 R14: 00007ffd16e32af0 R15: 00007ffd16e32e50 [ 30.668231] [ 30.668528] [ 30.668755] Allocated by task 212: [ 30.669180] kasan_save_stack+0x22/0x50 [ 30.669682] kasan_set_track+0x25/0x30 [ 30.670178] __kasan_slab_alloc+0x59/0x70 [ 30.670708] kmem_cache_alloc+0x16b/0x370 [ 30.671231] vm_area_dup+0x20/0x160 [ 30.671690] __split_vma+0x170/0x950 [ 30.672162] split_vma+0xc6/0x110 [ 30.672618] mprotect_fixup+0x8d2/0xb30 [ 30.673126] do_mprotect_pkey+0x87e/0xd40 [ 30.673653] __x64_sys_mprotect+0x78/0xc0 [ 30.674187] do_syscall_64+0x3f/0x90 [ 30.674675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.675321] [ 30.675543] Freed by task 212: [ 30.675939] kasan_save_stack+0x22/0x50 [ 30.676441] kasan_set_track+0x25/0x30 [ 30.676963] kasan_save_free_info+0x2b/0x50 [ 30.677497] __kasan_slab_free+0x10a/0x190 [ 30.678033] kmem_cache_free+0x10d/0x4d0 [ 30.678540] rcu_core+0x8c8/0x2860 [ 30.678994] __do_softirq+0x1b7/0x7d4 [ 30.679471] [ 30.679684] Last potentially related work creation: [ 30.680330] kasan_save_stack+0x22/0x50 [ 30.680848] __kasan_record_aux_stack+0x8e/0xa0 [ 30.681423] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.682070] remove_vma+0x139/0x170 [ 30.682521] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.683083] do_vmi_munmap+0x1f1/0x2b0 [ 30.683578] __vm_munmap+0x138/0x3a0 [ 30.684045] __x64_sys_munmap+0x59/0x80 [ 30.684540] do_syscall_64+0x3f/0x90 [ 30.685031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.685678] [ 30.685901] The buggy address belongs to the object at ffff888018cb5e80 [ 30.685901] which belongs to the cache vm_area_struct of size 168 [ 30.687367] The buggy address is located 88 bytes inside of [ 30.687367] freed 168-byte region [ffff888018cb5e80, ffff888018cb5f28) [ 30.688812] [ 30.689026] The buggy address belongs to the physical page: [ 30.689709] page:0000000005a16041 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18cb5 [ 30.690817] memcg:ffff888015e9b401 [ 30.691252] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.691911] page_type: 0xffffffff() [ 30.692367] raw: 0100000000000200 ffff8880087a0c80 ffffea000057a680 dead000000000008 [ 30.693304] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e9b401 [ 30.694209] page dumped because: kasan: bad access detected [ 30.694881] [ 30.695100] Memory state around the buggy address: [ 30.695677] ffff888018cb5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.696542] ffff888018cb5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.697427] >ffff888018cb5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.698286] ^ [ 30.699013] ffff888018cb5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.699866] ffff888018cb5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.700718] ================================================================== [ 30.701633] Disabling lock debugging due to kernel taint [ 32.861169] BUG: Bad rss-counter state mm:0000000063e38a8f type:MM_FILEPAGES val:33 [ 32.862357] BUG: Bad rss-counter state mm:0000000063e38a8f type:MM_ANONPAGES val:22 [ 33.448968] BUG: Bad rss-counter state mm:0000000031a8807c type:MM_FILEPAGES val:33 [ 33.450101] BUG: Bad rss-counter state mm:0000000031a8807c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7975' (ECDSA) to the list of known hosts. 2023/06/21 07:41:45 fuzzer started 2023/06/21 07:41:46 dialing manager at localhost:36067 2023/06/21 07:41:46 checking machine... 2023/06/21 07:41:46 checking revisions... [ 34.116860] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:41:46 testing simple program... [ 34.168426] cgroup: Unknown subsys name 'net' [ 34.207192] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:41:45 Registers: info registers vcpu 0 RAX=ffff888016946ee0 RBX=ffff88800eea2068 RCX=1ffff11001bf703a RDX=dffffc0000000000 RSI=ffff8880169a1000 RDI=ffff88800eea2098 RBP=ffff88800dfb81a0 RSP=ffff888016cffcb8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff8880169a0000 R13=0000000000000000 R14=ffff88801bf393d8 R15=ffff88801bf39390 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 00007fb276044900 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=00007fb2765fc0b0 CR3=0000000009eec000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000016de47e9a0 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806cf28140 RDI=00000000000534f8 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ee7a5 R11=ffff88806cf09ff8 R12=00000000000534f8 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 RFL=00000013 [----A-C] 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=00007f63fbd813d0 CR3=00000000096b8000 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=17115631341fbfbe5a426574bbea7b87 XMM02=2c67c8bc2e329bc3000000000011a570 XMM03=fb795ef6d65770560000000000120fb8 XMM04=ba200f6f8e1d018100000000000ae988 XMM05=dfcdbad4f1609c370000000000130e38 XMM06=d221ef7fb3c9c9dd000000000012f8a8 XMM07=e042d86d42eb936e0000000000121290 XMM08=a915beb5b6a867e1000000000011a5d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000