syzkaller login: [ 63.548374] BUG: Bad rss-counter state mm:0000000032efa503 type:MM_FILEPAGES val:33 [ 63.549859] BUG: Bad rss-counter state mm:0000000032efa503 type:MM_ANONPAGES val:22 [ 63.639987] ================================================================== [ 63.640926] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.641867] Read of size 8 at addr ffff88800fde7798 by task sshd/220 [ 63.642637] [ 63.642861] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 63.644070] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.645103] Call Trace: [ 63.645434] [ 63.645717] dump_stack_lvl+0x91/0xf0 [ 63.646209] print_report+0xcc/0x620 [ 63.646701] ? __virt_addr_valid+0x102/0x340 [ 63.647251] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.647868] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.648493] kasan_report+0xbe/0xf0 [ 63.648996] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.649624] vma_interval_tree_remove+0xc75/0xec0 [ 63.650222] vma_prepare+0xc54/0x11a0 [ 63.650699] __split_vma+0x5af/0x950 [ 63.651172] ? __pfx___split_vma+0x10/0x10 [ 63.651703] ? find_held_lock+0x2c/0x110 [ 63.652226] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.652801] ? lock_is_held_type+0x9f/0x120 [ 63.653341] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.653945] ? mtree_range_walk+0x632/0x900 [ 63.654495] ? mas_walk+0x5c7/0x7c0 [ 63.654972] do_vmi_munmap+0x1f1/0x2b0 [ 63.655470] mmap_region+0x1f9/0x2660 [ 63.655953] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.656468] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.657196] ? __pfx_lock_acquire+0x10/0x10 [ 63.657743] ? __pfx_mmap_region+0x10/0x10 [ 63.658271] ? security_mmap_addr+0x7d/0xa0 [ 63.658809] ? get_unmapped_area+0x1f5/0x3f0 [ 63.659356] do_mmap+0x854/0xf00 [ 63.659800] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.660291] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.660873] ksys_mmap_pgoff+0x3af/0x500 [ 63.661380] do_syscall_64+0x3f/0x90 [ 63.661863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.662507] RIP: 0033:0x7f8ad9d2bd82 [ 63.662962] 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 [ 63.665089] RSP: 002b:00007fff3edf46b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.666015] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ad9d2bd82 [ 63.666890] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ad9165000 [ 63.667743] RBP: 00007f8ad9165000 R08: 0000000000000009 R09: 0000000000001000 [ 63.668618] R10: 0000000000000812 R11: 0000000000000206 R12: 000055afab4caec0 [ 63.669475] R13: 00007fff3edf46d0 R14: 00007fff3edf4700 R15: 00007fff3edf4a60 [ 63.670338] [ 63.670637] [ 63.670857] Allocated by task 213: [ 63.671289] kasan_save_stack+0x22/0x50 [ 63.671800] kasan_set_track+0x25/0x30 [ 63.672299] __kasan_slab_alloc+0x59/0x70 [ 63.672839] kmem_cache_alloc+0x16b/0x370 [ 63.673362] vm_area_dup+0x20/0x160 [ 63.673821] __split_vma+0x170/0x950 [ 63.674286] split_vma+0xc6/0x110 [ 63.674725] mprotect_fixup+0x8d2/0xb30 [ 63.675227] do_mprotect_pkey+0x87e/0xd40 [ 63.675753] __x64_sys_mprotect+0x78/0xc0 [ 63.676277] do_syscall_64+0x3f/0x90 [ 63.676763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.677403] [ 63.677625] Freed by task 213: [ 63.678012] kasan_save_stack+0x22/0x50 [ 63.678511] kasan_set_track+0x25/0x30 [ 63.679013] kasan_save_free_info+0x2b/0x50 [ 63.679578] __kasan_slab_free+0x10a/0x190 [ 63.680121] kmem_cache_free+0x10d/0x4d0 [ 63.680647] rcu_core+0x8c8/0x2860 [ 63.681089] __do_softirq+0x1b7/0x7d4 [ 63.681561] [ 63.681780] Last potentially related work creation: [ 63.682368] kasan_save_stack+0x22/0x50 [ 63.682870] __kasan_record_aux_stack+0x8e/0xa0 [ 63.683444] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.684076] remove_vma+0x139/0x170 [ 63.684522] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.685101] do_vmi_munmap+0x1f1/0x2b0 [ 63.685587] __vm_munmap+0x138/0x3a0 [ 63.686057] __x64_sys_munmap+0x59/0x80 [ 63.686552] do_syscall_64+0x3f/0x90 [ 63.687024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.687663] [ 63.687878] The buggy address belongs to the object at ffff88800fde7740 [ 63.687878] which belongs to the cache vm_area_struct of size 168 [ 63.689359] The buggy address is located 88 bytes inside of [ 63.689359] freed 168-byte region [ffff88800fde7740, ffff88800fde77e8) [ 63.690763] [ 63.690977] The buggy address belongs to the physical page: [ 63.691636] page:000000006dcf2ce1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfde7 [ 63.692721] memcg:ffff888017e09f01 [ 63.693148] flags: 0x100000000000200(slab|node=0|zone=1) [ 63.693791] page_type: 0xffffffff() [ 63.694246] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 63.695160] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017e09f01 [ 63.696078] page dumped because: kasan: bad access detected [ 63.696738] [ 63.696954] Memory state around the buggy address: [ 63.697529] ffff88800fde7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.698387] ffff88800fde7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 63.699249] >ffff88800fde7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 63.700097] ^ [ 63.700612] ffff88800fde7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 63.701466] ffff88800fde7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 63.702317] ================================================================== [ 63.703447] Disabling lock debugging due to kernel taint [ 66.822554] BUG: Bad rss-counter state mm:00000000953804f0 type:MM_FILEPAGES val:33 [ 66.823482] BUG: Bad rss-counter state mm:00000000953804f0 type:MM_ANONPAGES val:22 [ 67.300837] BUG: Bad rss-counter state mm:00000000bf1b8975 type:MM_FILEPAGES val:33 [ 67.301872] BUG: Bad rss-counter state mm:00000000bf1b8975 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17028' (ECDSA) to the list of known hosts. 2023/06/19 12:13:27 fuzzer started 2023/06/19 12:13:28 dialing manager at localhost:44161 2023/06/19 12:13:28 checking machine... 2023/06/19 12:13:28 checking revisions... [ 68.033440] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:13:28 testing simple program... [ 68.084119] cgroup: Unknown subsys name 'net' [ 68.139183] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:12:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b30 RCX=ffff88806ce09b38 RDX=ffff88806ce0a000 RSI=1ffff1100d9c1355 RDI=ffff88806ce09a98 RBP=dffffc0000000000 RSP=ffff88806ce09a38 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88806ce09a98 R11=00000000000b6996 R12=ffffed100d9c1355 R13=ffffed100d9c1354 R14=ffff88806ce09ae0 R15=ffff88806ce09a98 RIP=ffffffff811305e0 RFL=00000216 [----AP-] 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 00007fc53670a900 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=00007fc536cbf650 CR3=000000001c9a8000 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=000000000000001c RCX=0000000000000000 RDX=ffff8880103451c0 RSI=ffffffff81894017 RDI=0000000000000005 RBP=ffff888014307d1a RSP=ffff8880143078a0 R8 =0000000000000005 R9 =0000000000000fe0 R10=000000000000001c R11=00000000000b6996 R12=ffff888016a7a200 R13=ffffffff85d3ce80 R14=ffff888014307928 R15=ffff888014307d36 RIP=ffffffff814c081b 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 00007f594d2ce900 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=00007f594c73d8f0 CR3=000000000f7a2000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=4319a10be7c3805600000000000ae988 XMM05=a5a6d164b2e074c200000000001399e8 XMM06=4fda316b135da52b00000000001387d8 XMM07=fb795ef6d65770560000000000128720 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000