syzkaller login: [ 38.706613] BUG: Bad rss-counter state mm:00000000096433df type:MM_FILEPAGES val:33 [ 38.708168] BUG: Bad rss-counter state mm:00000000096433df type:MM_ANONPAGES val:22 [ 38.879744] ================================================================== [ 38.880650] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.881588] Read of size 8 at addr ffff88801743bdf0 by task sshd/227 [ 38.882466] [ 38.882685] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.883557] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.884539] Call Trace: [ 38.884859] [ 38.885147] dump_stack_lvl+0x91/0xf0 [ 38.885642] print_report+0xcc/0x620 [ 38.886123] ? __virt_addr_valid+0x102/0x340 [ 38.886675] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887313] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887933] kasan_report+0xbe/0xf0 [ 38.888406] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889030] vma_interval_tree_remove+0xc75/0xec0 [ 38.889632] vma_prepare+0xc54/0x11a0 [ 38.890111] __split_vma+0x5af/0x950 [ 38.890594] ? __pfx___split_vma+0x10/0x10 [ 38.891148] ? find_held_lock+0x2c/0x110 [ 38.891673] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.892256] ? lock_is_held_type+0x9f/0x120 [ 38.892804] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.893410] ? mtree_range_walk+0x632/0x900 [ 38.893967] ? mas_walk+0x5c7/0x7c0 [ 38.894446] do_vmi_munmap+0x1f1/0x2b0 [ 38.894968] mmap_region+0x1f9/0x2660 [ 38.895465] ? mark_held_locks+0x9e/0xe0 [ 38.895984] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.896702] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 38.897338] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 38.897999] ? __pfx_mmap_region+0x10/0x10 [ 38.898524] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 38.899201] ? security_mmap_addr+0x7d/0xa0 [ 38.899738] ? get_unmapped_area+0x1f5/0x3f0 [ 38.900287] do_mmap+0x854/0xf00 [ 38.900727] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.901226] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.901790] ksys_mmap_pgoff+0x3af/0x500 [ 38.902301] do_syscall_64+0x3f/0x90 [ 38.902791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903440] RIP: 0033:0x7fc5324d2d82 [ 38.903899] 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 [ 38.906026] RSP: 002b:00007ffcabf6cb68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.906940] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc5324d2d82 [ 38.907821] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc53190c000 [ 38.908698] RBP: 00007fc53190c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.909570] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f815907f70 [ 38.910445] R13: 00007ffcabf6cb80 R14: 00007ffcabf6cbb0 R15: 00007ffcabf6cf10 [ 38.911357] [ 38.911662] [ 38.911885] Allocated by task 220: [ 38.912325] kasan_save_stack+0x22/0x50 [ 38.912851] kasan_set_track+0x25/0x30 [ 38.913429] __kasan_slab_alloc+0x59/0x70 [ 38.913985] kmem_cache_alloc+0x16b/0x370 [ 38.914526] vm_area_dup+0x20/0x160 [ 38.915025] __split_vma+0x170/0x950 [ 38.915507] split_vma+0xc6/0x110 [ 38.915961] mprotect_fixup+0x8d2/0xb30 [ 38.916482] do_mprotect_pkey+0x87e/0xd40 [ 38.917020] __x64_sys_mprotect+0x78/0xc0 [ 38.917562] do_syscall_64+0x3f/0x90 [ 38.918054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.918720] [ 38.918965] Freed by task 220: [ 38.919374] kasan_save_stack+0x22/0x50 [ 38.919890] kasan_set_track+0x25/0x30 [ 38.920403] kasan_save_free_info+0x2b/0x50 [ 38.920961] __kasan_slab_free+0x10a/0x190 [ 38.921516] kmem_cache_free+0x10d/0x4d0 [ 38.922046] rcu_core+0x8c8/0x2860 [ 38.922512] __do_softirq+0x1b7/0x7d4 [ 38.923028] [ 38.923251] Last potentially related work creation: [ 38.923863] kasan_save_stack+0x22/0x50 [ 38.924390] __kasan_record_aux_stack+0x8e/0xa0 [ 38.924984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.925654] remove_vma+0x139/0x170 [ 38.926130] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.926712] do_vmi_munmap+0x1f1/0x2b0 [ 38.927224] __vm_munmap+0x138/0x3a0 [ 38.927716] __x64_sys_munmap+0x59/0x80 [ 38.928235] do_syscall_64+0x3f/0x90 [ 38.928735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.929400] [ 38.929621] The buggy address belongs to the object at ffff88801743bd98 [ 38.929621] which belongs to the cache vm_area_struct of size 168 [ 38.931179] The buggy address is located 88 bytes inside of [ 38.931179] freed 168-byte region [ffff88801743bd98, ffff88801743be40) [ 38.932632] [ 38.932853] The buggy address belongs to the physical page: [ 38.933542] page:0000000043e48cec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1743b [ 38.934676] memcg:ffff88800c6e7e01 [ 38.935132] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.935807] page_type: 0xffffffff() [ 38.936269] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.937222] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6e7e01 [ 38.938167] page dumped because: kasan: bad access detected [ 38.938877] [ 38.939101] Memory state around the buggy address: [ 38.939706] ffff88801743bc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.940586] ffff88801743bd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.941472] >ffff88801743bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.942358] ^ [ 38.943213] ffff88801743be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.944098] ffff88801743be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.944978] ================================================================== [ 38.946061] Disabling lock debugging due to kernel taint [ 41.205719] BUG: Bad rss-counter state mm:00000000b81a6e48 type:MM_FILEPAGES val:33 [ 41.207132] BUG: Bad rss-counter state mm:00000000b81a6e48 type:MM_ANONPAGES val:22 [ 41.704910] BUG: Bad rss-counter state mm:000000001f41f50a type:MM_FILEPAGES val:33 [ 41.706443] BUG: Bad rss-counter state mm:000000001f41f50a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36661' (ECDSA) to the list of known hosts. 2023/06/20 17:08:16 fuzzer started 2023/06/20 17:08:16 dialing manager at localhost:36067 2023/06/20 17:08:16 checking machine... 2023/06/20 17:08:16 checking revisions... [ 42.450369] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:08:16 testing simple program... [ 42.492485] cgroup: Unknown subsys name 'net' [ 42.554182] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:08:16 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff844ca435 RDX=ffff888017720000 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88800e81ac0c RSP=ffff888016457a10 R8 =0000000000000007 R9 =0000000000000002 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007f9f9822f000 R14=00007f9f9822f000 R15=00007f9f98233000 RIP=ffffffff814c086b RFL=00000293 [--S-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 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=00007f9f9822eb70 CR3=000000000c5c6000 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=2e6f747079726362696c2f756e672d78 XMM02=00312e312e6f732e6f74707972636269 XMM03=6c2f756e672d78756e696c2d34365f36 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000cc0 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888015ced1ec RBP=ffff888015ced1c0 RSP=ffff888018e37578 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888008fae000 R13=00000000ffffffff R14=0000000000000cc0 R15=ffffffff8366a63c RIP=ffffffff81787aca RFL=00000213 [----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 00007f75b6035900 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=00007ffe96ff9000 CR3=000000000ec42000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000