syzkaller login: [ 36.152515] BUG: Bad rss-counter state mm:0000000043e1c007 type:MM_FILEPAGES val:33 [ 36.154035] BUG: Bad rss-counter state mm:0000000043e1c007 type:MM_ANONPAGES val:22 [ 36.321954] ================================================================== [ 36.323113] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.324308] Read of size 8 at addr ffff888015a865c8 by task sshd/220 [ 36.325456] [ 36.325735] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.326786] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.328121] Call Trace: [ 36.328523] [ 36.328871] dump_stack_lvl+0x91/0xf0 [ 36.329474] print_report+0xcc/0x620 [ 36.330079] ? __virt_addr_valid+0x102/0x340 [ 36.330757] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.331514] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.332293] kasan_report+0xbe/0xf0 [ 36.332885] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.333659] vma_interval_tree_remove+0xc75/0xec0 [ 36.334412] vma_prepare+0xc54/0x11a0 [ 36.335010] __split_vma+0x5af/0x950 [ 36.335587] ? __pfx___split_vma+0x10/0x10 [ 36.336269] ? find_held_lock+0x2c/0x110 [ 36.336808] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.337392] ? lock_is_held_type+0x9f/0x120 [ 36.337947] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.338576] ? mtree_range_walk+0x632/0x900 [ 36.339149] ? mas_walk+0x5c7/0x7c0 [ 36.339656] do_vmi_munmap+0x1f1/0x2b0 [ 36.340172] mmap_region+0x1f9/0x2660 [ 36.340678] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.341213] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.341965] ? __pfx_lock_acquire+0x10/0x10 [ 36.342527] ? __pfx_mmap_region+0x10/0x10 [ 36.343086] ? security_mmap_addr+0x7d/0xa0 [ 36.343648] ? get_unmapped_area+0x1f5/0x3f0 [ 36.344222] do_mmap+0x854/0xf00 [ 36.344686] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.345203] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.345791] ksys_mmap_pgoff+0x3af/0x500 [ 36.346323] do_syscall_64+0x3f/0x90 [ 36.346820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.347516] RIP: 0033:0x7f32cec02d82 [ 36.348011] 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 [ 36.350234] RSP: 002b:00007ffe5a2536d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.351176] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f32cec02d82 [ 36.352085] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f32ce03c000 [ 36.352971] RBP: 00007f32ce03c000 R08: 0000000000000009 R09: 0000000000001000 [ 36.353868] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e960ab6ec0 [ 36.354741] R13: 00007ffe5a2536f0 R14: 00007ffe5a253720 R15: 00007ffe5a253a80 [ 36.355657] [ 36.355967] [ 36.356188] Allocated by task 213: [ 36.356641] kasan_save_stack+0x22/0x50 [ 36.357173] kasan_set_track+0x25/0x30 [ 36.357696] __kasan_slab_alloc+0x59/0x70 [ 36.358239] kmem_cache_alloc+0x16b/0x370 [ 36.358778] vm_area_dup+0x20/0x160 [ 36.359259] __split_vma+0x170/0x950 [ 36.359764] split_vma+0xc6/0x110 [ 36.360228] mprotect_fixup+0x8d2/0xb30 [ 36.360756] do_mprotect_pkey+0x87e/0xd40 [ 36.361288] __x64_sys_mprotect+0x78/0xc0 [ 36.361815] do_syscall_64+0x3f/0x90 [ 36.362292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.362932] [ 36.363147] Freed by task 19: [ 36.363530] kasan_save_stack+0x22/0x50 [ 36.364043] kasan_set_track+0x25/0x30 [ 36.364538] kasan_save_free_info+0x2b/0x50 [ 36.365078] __kasan_slab_free+0x10a/0x190 [ 36.365607] kmem_cache_free+0x10d/0x4d0 [ 36.366116] rcu_core+0x8c8/0x2860 [ 36.366563] __do_softirq+0x1b7/0x7d4 [ 36.367041] [ 36.367257] Last potentially related work creation: [ 36.367857] kasan_save_stack+0x22/0x50 [ 36.368357] __kasan_record_aux_stack+0x8e/0xa0 [ 36.368926] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.369569] remove_vma+0x139/0x170 [ 36.370155] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.370713] do_vmi_munmap+0x1f1/0x2b0 [ 36.371192] __vm_munmap+0x138/0x3a0 [ 36.371680] __x64_sys_munmap+0x59/0x80 [ 36.372191] do_syscall_64+0x3f/0x90 [ 36.372678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.373342] [ 36.373570] Second to last potentially related work creation: [ 36.374275] kasan_save_stack+0x22/0x50 [ 36.374803] __kasan_record_aux_stack+0x8e/0xa0 [ 36.375396] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.376082] remove_vma+0x139/0x170 [ 36.376544] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.377113] do_vmi_munmap+0x1f1/0x2b0 [ 36.377622] mmap_region+0x1f9/0x2660 [ 36.378116] do_mmap+0x854/0xf00 [ 36.378563] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.379077] ksys_mmap_pgoff+0x3af/0x500 [ 36.379596] do_syscall_64+0x3f/0x90 [ 36.380102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.380759] [ 36.380982] The buggy address belongs to the object at ffff888015a86570 [ 36.380982] which belongs to the cache vm_area_struct of size 168 [ 36.382509] The buggy address is located 88 bytes inside of [ 36.382509] freed 168-byte region [ffff888015a86570, ffff888015a86618) [ 36.383990] [ 36.384216] The buggy address belongs to the physical page: [ 36.384904] page:00000000fb2391ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a86 [ 36.386039] memcg:ffff888015a85101 [ 36.386479] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.387211] page_type: 0xffffffff() [ 36.387699] raw: 0100000000000200 ffff88800879fc80 ffffea000056a000 0000000000000009 [ 36.388650] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a85101 [ 36.389593] page dumped because: kasan: bad access detected [ 36.390281] [ 36.390506] Memory state around the buggy address: [ 36.391107] ffff888015a86480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.392010] ffff888015a86500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 36.392894] >ffff888015a86580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.393788] ^ [ 36.394480] ffff888015a86600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 36.395370] ffff888015a86680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.396260] ================================================================== [ 36.397239] Disabling lock debugging due to kernel taint [ 38.513742] BUG: Bad rss-counter state mm:0000000010879fa9 type:MM_FILEPAGES val:33 [ 38.515258] BUG: Bad rss-counter state mm:0000000010879fa9 type:MM_ANONPAGES val:22 [ 39.095532] BUG: Bad rss-counter state mm:00000000ae6f2e56 type:MM_FILEPAGES val:33 [ 39.096721] BUG: Bad rss-counter state mm:00000000ae6f2e56 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44509' (ECDSA) to the list of known hosts. 2023/06/19 13:45:51 fuzzer started 2023/06/19 13:45:51 dialing manager at localhost:44161 2023/06/19 13:45:51 checking machine... 2023/06/19 13:45:51 checking revisions... [ 39.776513] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:45:51 testing simple program... [ 39.827322] cgroup: Unknown subsys name 'net' [ 39.889185] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:45:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fe1cda98f18 RCX=1ffffffff0ba72c0 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007fe1cda98f18 RSP=ffff88806ce09a50 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007fe1cda98000 R11=00000000000b6996 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff8880159151c0 R15=ffff88800fe74670 RIP=ffffffff8135b8e0 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 00007fe1cd5b1900 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=00007fe1cdb690b0 CR3=000000001b824000 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=0000000000000000 RBX=ffff88801417a000 RCX=0000000000000000 RDX=ffffffff81825f00 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=dffffc0000000000 RSP=ffff8880143c75e0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800db27180 R13=0000000000000001 R14=ffffffff818c8d22 R15=0000000000000000 RIP=ffffffff81374460 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 00007f34f368c900 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=00007f34f2a95280 CR3=000000000cb16000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b72679346c6281c900000000000ae988 XMM05=f45efd7e0794a5f00000000000137298 XMM06=19e9129bd510f2350000000000136130 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000