syzkaller login: [ 38.743231] BUG: Bad rss-counter state mm:0000000099616fe8 type:MM_FILEPAGES val:33 [ 38.745174] BUG: Bad rss-counter state mm:0000000099616fe8 type:MM_ANONPAGES val:22 [ 38.908646] ================================================================== [ 38.909516] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.910409] Read of size 8 at addr ffff88800cb5fc20 by task sshd/221 [ 38.911128] [ 38.911438] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.912253] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.913168] Call Trace: [ 38.913491] <TASK> [ 38.913760] dump_stack_lvl+0x91/0xf0 [ 38.914221] print_report+0xcc/0x620 [ 38.914677] ? __virt_addr_valid+0x102/0x340 [ 38.915194] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.915803] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.916388] kasan_report+0xbe/0xf0 [ 38.916840] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.917427] vma_interval_tree_remove+0xc75/0xec0 [ 38.917991] vma_prepare+0xc54/0x11a0 [ 38.918449] __split_vma+0x5af/0x950 [ 38.918893] ? __pfx___split_vma+0x10/0x10 [ 38.919392] ? find_held_lock+0x2c/0x110 [ 38.919901] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.920452] ? lock_is_held_type+0x9f/0x120 [ 38.921001] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.921603] ? mtree_range_walk+0x632/0x900 [ 38.922157] ? mas_walk+0x5c7/0x7c0 [ 38.922630] do_vmi_munmap+0x1f1/0x2b0 [ 38.923127] mmap_region+0x1f9/0x2660 [ 38.923625] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.924135] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.924859] ? __pfx_lock_acquire+0x10/0x10 [ 38.925394] ? __pfx_mmap_region+0x10/0x10 [ 38.925916] ? security_mmap_addr+0x7d/0xa0 [ 38.926450] ? get_unmapped_area+0x1f5/0x3f0 [ 38.927005] do_mmap+0x854/0xf00 [ 38.927426] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.927898] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.928425] ksys_mmap_pgoff+0x3af/0x500 [ 38.928905] do_syscall_64+0x3f/0x90 [ 38.929358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.929970] RIP: 0033:0x7fd8f477dd82 [ 38.930401] 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 [ 38.932391] RSP: 002b:00007ffce54953b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.933236] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd8f477dd82 [ 38.934029] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd8f3bb7000 [ 38.934822] RBP: 00007fd8f3bb7000 R08: 0000000000000009 R09: 0000000000001000 [ 38.935628] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a787b11f60 [ 38.936418] R13: 00007ffce54953d0 R14: 00007ffce5495400 R15: 00007ffce5495760 [ 38.937218] </TASK> [ 38.937493] [ 38.937696] Allocated by task 212: [ 38.938100] kasan_save_stack+0x22/0x50 [ 38.938576] kasan_set_track+0x25/0x30 [ 38.939043] __kasan_slab_alloc+0x59/0x70 [ 38.939547] kmem_cache_alloc+0x16b/0x370 [ 38.940033] vm_area_dup+0x20/0x160 [ 38.940460] __split_vma+0x170/0x950 [ 38.940897] split_vma+0xc6/0x110 [ 38.941313] mprotect_fixup+0x8d2/0xb30 [ 38.941798] do_mprotect_pkey+0x87e/0xd40 [ 38.942315] __x64_sys_mprotect+0x78/0xc0 [ 38.942826] do_syscall_64+0x3f/0x90 [ 38.943311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.943961] [ 38.944175] Freed by task 212: [ 38.944557] kasan_save_stack+0x22/0x50 [ 38.945093] kasan_set_track+0x25/0x30 [ 38.945560] kasan_save_free_info+0x2b/0x50 [ 38.946060] __kasan_slab_free+0x10a/0x190 [ 38.946560] kmem_cache_free+0x10d/0x4d0 [ 38.947035] rcu_core+0x8c8/0x2860 [ 38.947457] __do_softirq+0x1b7/0x7d4 [ 38.947910] [ 38.948128] Last potentially related work creation: [ 38.948746] kasan_save_stack+0x22/0x50 [ 38.949225] __kasan_record_aux_stack+0x8e/0xa0 [ 38.949764] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.950370] remove_vma+0x139/0x170 [ 38.950796] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.951355] do_vmi_munmap+0x1f1/0x2b0 [ 38.951856] __vm_munmap+0x138/0x3a0 [ 38.952316] __x64_sys_munmap+0x59/0x80 [ 38.952918] do_syscall_64+0x3f/0x90 [ 38.953481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.954265] [ 38.954529] The buggy address belongs to the object at ffff88800cb5fbc8 [ 38.954529] which belongs to the cache vm_area_struct of size 168 [ 38.956289] The buggy address is located 88 bytes inside of [ 38.956289] freed 168-byte region [ffff88800cb5fbc8, ffff88800cb5fc70) [ 38.958039] [ 38.958292] The buggy address belongs to the physical page: [ 38.959097] page:00000000b8945f65 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb5f [ 38.960414] memcg:ffff88800cfb3101 [ 38.960914] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.961789] page_type: 0xffffffff() [ 38.962354] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.963517] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfb3101 [ 38.964644] page dumped because: kasan: bad access detected [ 38.965474] [ 38.965738] Memory state around the buggy address: [ 38.966461] ffff88800cb5fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.967569] ffff88800cb5fb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.968613] >ffff88800cb5fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.969636] ^ [ 38.970271] ffff88800cb5fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.971289] ffff88800cb5fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.972269] ================================================================== [ 38.973398] Disabling lock debugging due to kernel taint [ 40.864044] BUG: Bad rss-counter state mm:000000007d87929d type:MM_FILEPAGES val:33 [ 40.865158] BUG: Bad rss-counter state mm:000000007d87929d type:MM_ANONPAGES val:22 [ 41.212005] BUG: Bad rss-counter state mm:00000000e5c14c82 type:MM_FILEPAGES val:33 [ 41.212994] BUG: Bad rss-counter state mm:00000000e5c14c82 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41914' (ECDSA) to the list of known hosts. 2023/06/20 19:43:42 fuzzer started 2023/06/20 19:43:42 dialing manager at localhost:36067 2023/06/20 19:43:42 checking machine... 2023/06/20 19:43:42 checking revisions... [ 41.919328] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:43:42 testing simple program... [ 41.970429] cgroup: Unknown subsys name 'net' [ 42.020936] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:43:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fbf937b6cc0 CR3=000000000cb72000 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=c34b771ebc41b6a39e48120a7667f2e0 XMM02=000000000011b540ec2efd57dc4c00df XMM03=0000000000121ee0d25999998ff4030f XMM04=c6019d397a1445ab00000000000ae988 XMM05=cf2dca5025f984a30000000000132c40 XMM06=806171799158d9670000000000131970 XMM07=e042d86d42eb936e00000000001221b8 XMM08=d25999998ff4030f000000000011b5a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff83640612 RCX=0000000000000001 RDX=1ffff1100334be7c RSI=ffff888019a5fc80 RDI=ffffffff83640612 RBP=ffffffff83640612 RSP=ffff888019a5f338 R8 =0000000000000001 R9 =ffff888019a5f3c8 R10=0000000000038001 R11=000000000008a84f R12=0000000000000001 R13=0000000000000000 R14=ffff888015eb51c0 R15=00000000000128c0 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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 00007f88422ad900 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=00007ffe64b08000 CR3=0000000018448000 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