syzkaller login: [ 32.734410] BUG: Bad rss-counter state mm:00000000d9fec069 type:MM_FILEPAGES val:33 [ 32.735406] BUG: Bad rss-counter state mm:00000000d9fec069 type:MM_ANONPAGES val:22 [ 32.896591] ================================================================== [ 32.897533] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.898487] Read of size 8 at addr ffff88800e069b38 by task sshd/221 [ 32.899416] [ 32.899751] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.900633] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.901840] Call Trace: [ 32.902235] [ 32.902592] dump_stack_lvl+0x91/0xf0 [ 32.903208] print_report+0xcc/0x620 [ 32.903808] ? __virt_addr_valid+0x102/0x340 [ 32.904520] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.905281] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.906053] kasan_report+0xbe/0xf0 [ 32.906639] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.907325] vma_interval_tree_remove+0xc75/0xec0 [ 32.907967] vma_prepare+0xc54/0x11a0 [ 32.908449] __split_vma+0x5af/0x950 [ 32.908924] ? __pfx___split_vma+0x10/0x10 [ 32.909462] ? find_held_lock+0x2c/0x110 [ 32.909994] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.910558] ? lock_is_held_type+0x9f/0x120 [ 32.911108] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.911728] ? mtree_range_walk+0x632/0x900 [ 32.912283] ? mas_walk+0x5c7/0x7c0 [ 32.912754] do_vmi_munmap+0x1f1/0x2b0 [ 32.913253] mmap_region+0x1f9/0x2660 [ 32.913748] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.914261] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.914983] ? __pfx_lock_acquire+0x10/0x10 [ 32.915515] ? __pfx_mmap_region+0x10/0x10 [ 32.916067] ? security_mmap_addr+0x7d/0xa0 [ 32.916593] ? get_unmapped_area+0x1f5/0x3f0 [ 32.917172] do_mmap+0x854/0xf00 [ 32.917618] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.918116] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.918692] ksys_mmap_pgoff+0x3af/0x500 [ 32.919220] do_syscall_64+0x3f/0x90 [ 32.919716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.920382] RIP: 0033:0x7ff0477fed82 [ 32.920840] 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 [ 32.922976] RSP: 002b:00007ffc3cb3e6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.923940] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff0477fed82 [ 32.924809] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff046c38000 [ 32.925665] RBP: 00007ff046c38000 R08: 0000000000000009 R09: 0000000000001000 [ 32.926567] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ff25acec0 [ 32.927436] R13: 00007ffc3cb3e710 R14: 00007ffc3cb3e740 R15: 00007ffc3cb3eaa0 [ 32.928310] [ 32.928605] [ 32.928827] Allocated by task 214: [ 32.929258] kasan_save_stack+0x22/0x50 [ 32.929767] kasan_set_track+0x25/0x30 [ 32.930270] __kasan_slab_alloc+0x59/0x70 [ 32.930806] kmem_cache_alloc+0x16b/0x370 [ 32.931327] vm_area_dup+0x20/0x160 [ 32.931797] __split_vma+0x170/0x950 [ 32.932276] split_vma+0xc6/0x110 [ 32.932714] mprotect_fixup+0x8d2/0xb30 [ 32.933261] do_mprotect_pkey+0x87e/0xd40 [ 32.933806] __x64_sys_mprotect+0x78/0xc0 [ 32.934350] do_syscall_64+0x3f/0x90 [ 32.934845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.935497] [ 32.935716] Freed by task 19: [ 32.936126] kasan_save_stack+0x22/0x50 [ 32.936634] kasan_set_track+0x25/0x30 [ 32.937133] kasan_save_free_info+0x2b/0x50 [ 32.937663] __kasan_slab_free+0x10a/0x190 [ 32.938196] kmem_cache_free+0x10d/0x4d0 [ 32.938703] rcu_core+0x8c8/0x2860 [ 32.939150] __do_softirq+0x1b7/0x7d4 [ 32.939624] [ 32.939843] Last potentially related work creation: [ 32.940442] kasan_save_stack+0x22/0x50 [ 32.940947] __kasan_record_aux_stack+0x8e/0xa0 [ 32.941523] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.942166] remove_vma+0x139/0x170 [ 32.942640] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.943235] do_vmi_munmap+0x1f1/0x2b0 [ 32.943733] __vm_munmap+0x138/0x3a0 [ 32.944212] __x64_sys_munmap+0x59/0x80 [ 32.944717] do_syscall_64+0x3f/0x90 [ 32.945240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.946011] [ 32.946281] Second to last potentially related work creation: [ 32.947146] kasan_save_stack+0x22/0x50 [ 32.947776] __kasan_record_aux_stack+0x8e/0xa0 [ 32.948513] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.949312] remove_vma+0x139/0x170 [ 32.949874] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.950580] do_vmi_munmap+0x1f1/0x2b0 [ 32.951183] mmap_region+0x1f9/0x2660 [ 32.951767] do_mmap+0x854/0xf00 [ 32.952266] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.952778] ksys_mmap_pgoff+0x3af/0x500 [ 32.953339] do_syscall_64+0x3f/0x90 [ 32.953800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.954444] [ 32.954665] The buggy address belongs to the object at ffff88800e069ae0 [ 32.954665] which belongs to the cache vm_area_struct of size 168 [ 32.956202] The buggy address is located 88 bytes inside of [ 32.956202] freed 168-byte region [ffff88800e069ae0, ffff88800e069b88) [ 32.957608] [ 32.957825] The buggy address belongs to the physical page: [ 32.958492] page:000000009bf88cf5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe069 [ 32.959610] memcg:ffff88800c506501 [ 32.960042] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.960720] page_type: 0xffffffff() [ 32.961167] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 32.962105] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c506501 [ 32.963051] page dumped because: kasan: bad access detected [ 32.963734] [ 32.963956] Memory state around the buggy address: [ 32.964548] ffff88800e069a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.965424] ffff88800e069a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 32.966301] >ffff88800e069b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.967149] ^ [ 32.967766] ffff88800e069b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.968644] ffff88800e069c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.969532] ================================================================== [ 32.970615] Disabling lock debugging due to kernel taint [ 34.943253] BUG: Bad rss-counter state mm:00000000c8a690e5 type:MM_FILEPAGES val:33 [ 34.944439] BUG: Bad rss-counter state mm:00000000c8a690e5 type:MM_ANONPAGES val:22 [ 35.324855] BUG: Bad rss-counter state mm:00000000e62b20d3 type:MM_FILEPAGES val:33 [ 35.325862] BUG: Bad rss-counter state mm:00000000e62b20d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26913' (ECDSA) to the list of known hosts. 2023/06/20 01:20:06 fuzzer started 2023/06/20 01:20:06 dialing manager at localhost:44161 2023/06/20 01:20:06 checking machine... 2023/06/20 01:20:06 checking revisions... [ 36.055151] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:20:06 testing simple program... [ 36.111159] cgroup: Unknown subsys name 'net' [ 36.148277] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:20:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000255 RCX=0000000000000000 RDX=ffff88800f0db680 RSI=ffffffff8113b892 RDI=ffffffff85d3bed0 RBP=ffff888017d0ff58 RSP=ffff888017d0fed0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000007 R13=00007ff53f367968 R14=0000000000000001 R15=ffff888015b24a00 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff53e7c5900 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=00007ff53f367968 CR3=0000000016a62000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f28f65bf870 CR3=00000000143be000 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=2035303a30323a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a30323a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000