syzkaller login: [ 30.213235] BUG: Bad rss-counter state mm:00000000db8a726e type:MM_FILEPAGES val:33 [ 30.214605] BUG: Bad rss-counter state mm:00000000db8a726e type:MM_ANONPAGES val:22 [ 30.366468] ================================================================== [ 30.367370] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.368311] Read of size 8 at addr ffff8880102fcd08 by task sshd/222 [ 30.369093] [ 30.369374] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.370308] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.371280] Call Trace: [ 30.371599] [ 30.371907] dump_stack_lvl+0x91/0xf0 [ 30.372400] print_report+0xcc/0x620 [ 30.372907] ? __virt_addr_valid+0x102/0x340 [ 30.373461] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.374092] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.374710] kasan_report+0xbe/0xf0 [ 30.375187] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.375814] vma_interval_tree_remove+0xc75/0xec0 [ 30.376457] vma_prepare+0xc54/0x11a0 [ 30.376970] __split_vma+0x5af/0x950 [ 30.377475] ? __pfx___split_vma+0x10/0x10 [ 30.378044] ? find_held_lock+0x2c/0x110 [ 30.378591] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.379175] ? lock_is_held_type+0x9f/0x120 [ 30.379744] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.380391] ? mtree_range_walk+0x632/0x900 [ 30.380994] ? mas_walk+0x5c7/0x7c0 [ 30.381505] do_vmi_munmap+0x1f1/0x2b0 [ 30.382027] mmap_region+0x1f9/0x2660 [ 30.382542] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.383078] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.383830] ? __pfx_lock_acquire+0x10/0x10 [ 30.384398] ? __pfx_mmap_region+0x10/0x10 [ 30.384963] ? security_mmap_addr+0x7d/0xa0 [ 30.385535] ? get_unmapped_area+0x1f5/0x3f0 [ 30.386111] do_mmap+0x854/0xf00 [ 30.386576] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.387100] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.387687] ksys_mmap_pgoff+0x3af/0x500 [ 30.388220] do_syscall_64+0x3f/0x90 [ 30.388733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.389420] RIP: 0033:0x7fe7762a3d82 [ 30.389904] 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 [ 30.392195] RSP: 002b:00007fff8bfdf198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.393178] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe7762a3d82 [ 30.394086] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe7756dd000 [ 30.394989] RBP: 00007fe7756dd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.395891] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557483bd2f60 [ 30.396805] R13: 00007fff8bfdf1b0 R14: 00007fff8bfdf1e0 R15: 00007fff8bfdf540 [ 30.397729] [ 30.398038] [ 30.398263] Allocated by task 215: [ 30.398715] kasan_save_stack+0x22/0x50 [ 30.399249] kasan_set_track+0x25/0x30 [ 30.399771] __kasan_slab_alloc+0x59/0x70 [ 30.400334] kmem_cache_alloc+0x16b/0x370 [ 30.400904] vm_area_dup+0x20/0x160 [ 30.401395] __split_vma+0x170/0x950 [ 30.401889] split_vma+0xc6/0x110 [ 30.402358] mprotect_fixup+0x8d2/0xb30 [ 30.402894] do_mprotect_pkey+0x87e/0xd40 [ 30.403444] __x64_sys_mprotect+0x78/0xc0 [ 30.403988] do_syscall_64+0x3f/0x90 [ 30.404497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.405184] [ 30.405412] Freed by task 19: [ 30.405819] kasan_save_stack+0x22/0x50 [ 30.406354] kasan_set_track+0x25/0x30 [ 30.406877] kasan_save_free_info+0x2b/0x50 [ 30.407447] __kasan_slab_free+0x10a/0x190 [ 30.408011] kmem_cache_free+0x10d/0x4d0 [ 30.408579] rcu_core+0x8c8/0x2860 [ 30.409049] __do_softirq+0x1b7/0x7d4 [ 30.409550] [ 30.409780] Last potentially related work creation: [ 30.410407] kasan_save_stack+0x22/0x50 [ 30.410973] __kasan_record_aux_stack+0x8e/0xa0 [ 30.411587] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.412269] remove_vma+0x139/0x170 [ 30.412754] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.413351] do_vmi_munmap+0x1f1/0x2b0 [ 30.413870] __vm_munmap+0x138/0x3a0 [ 30.414367] __x64_sys_munmap+0x59/0x80 [ 30.414892] do_syscall_64+0x3f/0x90 [ 30.415396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.416078] [ 30.416298] The buggy address belongs to the object at ffff8880102fccb0 [ 30.416298] which belongs to the cache vm_area_struct of size 168 [ 30.417864] The buggy address is located 88 bytes inside of [ 30.417864] freed 168-byte region [ffff8880102fccb0, ffff8880102fcd58) [ 30.419357] [ 30.419580] The buggy address belongs to the physical page: [ 30.420282] page:000000002be7f4f5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102fc [ 30.421472] memcg:ffff888014277701 [ 30.421925] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.422668] page_type: 0xffffffff() [ 30.423150] raw: 0100000000000200 ffff8880087a0c80 ffffea000038c0c0 dead000000000003 [ 30.424127] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014277701 [ 30.425093] page dumped because: kasan: bad access detected [ 30.425800] [ 30.426026] Memory state around the buggy address: [ 30.426639] ffff8880102fcc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.427539] ffff8880102fcc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.428450] >ffff8880102fcd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.429361] ^ [ 30.429826] ffff8880102fcd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.430739] ffff8880102fce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.431641] ================================================================== [ 30.432631] Disabling lock debugging due to kernel taint [ 32.614245] BUG: Bad rss-counter state mm:00000000055c209e type:MM_FILEPAGES val:33 [ 32.615855] BUG: Bad rss-counter state mm:00000000055c209e type:MM_ANONPAGES val:22 [ 33.066144] BUG: Bad rss-counter state mm:000000008c4b8a6f type:MM_FILEPAGES val:33 [ 33.067858] BUG: Bad rss-counter state mm:000000008c4b8a6f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17175' (ECDSA) to the list of known hosts. 2023/06/20 18:29:31 fuzzer started 2023/06/20 18:29:31 dialing manager at localhost:36067 2023/06/20 18:29:31 checking machine... 2023/06/20 18:29:31 checking revisions... [ 33.797293] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:29:31 testing simple program... [ 33.837189] cgroup: Unknown subsys name 'net' [ 33.879315] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:29:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800e933048 RCX=ffffffff812e0135 RDX=1ffff11001d26609 RSI=ffffffff87b89f80 RDI=ffff88800e933c30 RBP=ffff88800e933d10 RSP=ffff88806ce09e08 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6a61 R12=0000000000000287 R13=ffff88800e933c28 R14=ffffffff813782f8 R15=ffff8880093ca400 RIP=ffffffff84519679 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 00007f8f84055900 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=00007f8f8460a650 CR3=000000000ca3e000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffe0e41b2e8 CR3=000000000ebe2000 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=2030333a39323a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a39323a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000