syzkaller login: [ 43.726409] BUG: Bad rss-counter state mm:00000000f735074b type:MM_FILEPAGES val:33 [ 43.727851] BUG: Bad rss-counter state mm:00000000f735074b type:MM_ANONPAGES val:22 [ 43.866502] ================================================================== [ 43.867447] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.868394] Read of size 8 at addr ffff88800fdb6798 by task sshd/219 [ 43.869171] [ 43.869557] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.870443] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.871420] Call Trace: [ 43.871742] [ 43.872033] dump_stack_lvl+0x91/0xf0 [ 43.872526] print_report+0xcc/0x620 [ 43.873017] ? __virt_addr_valid+0x102/0x340 [ 43.873571] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.874182] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.874802] kasan_report+0xbe/0xf0 [ 43.875303] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.875925] vma_interval_tree_remove+0xc75/0xec0 [ 43.876522] vma_prepare+0xc54/0x11a0 [ 43.877005] __split_vma+0x5af/0x950 [ 43.877474] ? __pfx___split_vma+0x10/0x10 [ 43.878003] ? find_held_lock+0x2c/0x110 [ 43.878520] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.879100] ? lock_is_held_type+0x9f/0x120 [ 43.879637] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.880238] ? mtree_range_walk+0x632/0x900 [ 43.880782] ? mas_walk+0x5c7/0x7c0 [ 43.881254] do_vmi_munmap+0x1f1/0x2b0 [ 43.881744] mmap_region+0x1f9/0x2660 [ 43.882231] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.882737] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.883465] ? __pfx_lock_acquire+0x10/0x10 [ 43.883998] ? __pfx_mmap_region+0x10/0x10 [ 43.884523] ? security_mmap_addr+0x7d/0xa0 [ 43.885056] ? get_unmapped_area+0x1f5/0x3f0 [ 43.885600] do_mmap+0x854/0xf00 [ 43.886042] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.886540] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.887121] ksys_mmap_pgoff+0x3af/0x500 [ 43.887630] do_syscall_64+0x3f/0x90 [ 43.888109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.888753] RIP: 0033:0x7f71a8d8dd82 [ 43.889213] 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 [ 43.891340] RSP: 002b:00007ffdbcb9ec38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.892247] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f71a8d8dd82 [ 43.893098] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f71a81c7000 [ 43.893939] RBP: 00007f71a81c7000 R08: 0000000000000009 R09: 0000000000001000 [ 43.894777] R10: 0000000000000812 R11: 0000000000000206 R12: 000055620c54bf60 [ 43.895626] R13: 00007ffdbcb9ec50 R14: 00007ffdbcb9ec80 R15: 00007ffdbcb9efe0 [ 43.896475] [ 43.896766] [ 43.896985] Allocated by task 212: [ 43.897415] kasan_save_stack+0x22/0x50 [ 43.897919] kasan_set_track+0x25/0x30 [ 43.898410] __kasan_slab_alloc+0x59/0x70 [ 43.898943] kmem_cache_alloc+0x16b/0x370 [ 43.899458] vm_area_dup+0x20/0x160 [ 43.899910] __split_vma+0x170/0x950 [ 43.900374] split_vma+0xc6/0x110 [ 43.900812] mprotect_fixup+0x8d2/0xb30 [ 43.901311] do_mprotect_pkey+0x87e/0xd40 [ 43.901829] __x64_sys_mprotect+0x78/0xc0 [ 43.902346] do_syscall_64+0x3f/0x90 [ 43.902816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.903472] [ 43.903688] Freed by task 202: [ 43.904085] kasan_save_stack+0x22/0x50 [ 43.904590] kasan_set_track+0x25/0x30 [ 43.905083] kasan_save_free_info+0x2b/0x50 [ 43.905622] __kasan_slab_free+0x10a/0x190 [ 43.906162] kmem_cache_free+0x10d/0x4d0 [ 43.906672] rcu_core+0x8c8/0x2860 [ 43.907141] __do_softirq+0x1b7/0x7d4 [ 43.907625] [ 43.907842] Last potentially related work creation: [ 43.908430] kasan_save_stack+0x22/0x50 [ 43.908934] __kasan_record_aux_stack+0x8e/0xa0 [ 43.909504] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.910153] remove_vma+0x139/0x170 [ 43.910609] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.911201] do_vmi_munmap+0x1f1/0x2b0 [ 43.911695] __vm_munmap+0x138/0x3a0 [ 43.912168] __x64_sys_munmap+0x59/0x80 [ 43.912662] do_syscall_64+0x3f/0x90 [ 43.913132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.913768] [ 43.913990] The buggy address belongs to the object at ffff88800fdb6740 [ 43.913990] which belongs to the cache vm_area_struct of size 168 [ 43.915455] The buggy address is located 88 bytes inside of [ 43.915455] freed 168-byte region [ffff88800fdb6740, ffff88800fdb67e8) [ 43.916861] [ 43.917079] The buggy address belongs to the physical page: [ 43.917737] page:000000001d73ebc7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdb6 [ 43.918819] memcg:ffff8880094baf01 [ 43.919257] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.919954] page_type: 0xffffffff() [ 43.920400] raw: 0100000000000200 ffff88800879fc80 ffffea00003adc40 dead000000000007 [ 43.921307] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094baf01 [ 43.922202] page dumped because: kasan: bad access detected [ 43.922858] [ 43.923084] Memory state around the buggy address: [ 43.923662] ffff88800fdb6680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.924513] ffff88800fdb6700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 43.925356] >ffff88800fdb6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 43.926200] ^ [ 43.926690] ffff88800fdb6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 43.927553] ffff88800fdb6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 43.928402] ================================================================== [ 43.929435] Disabling lock debugging due to kernel taint [ 45.989199] BUG: Bad rss-counter state mm:00000000ac89f2e9 type:MM_FILEPAGES val:33 [ 45.990381] BUG: Bad rss-counter state mm:00000000ac89f2e9 type:MM_ANONPAGES val:22 [ 46.452131] BUG: Bad rss-counter state mm:00000000a22c4f7c type:MM_FILEPAGES val:33 [ 46.453293] BUG: Bad rss-counter state mm:00000000a22c4f7c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61416' (ECDSA) to the list of known hosts. 2023/06/20 03:19:11 fuzzer started 2023/06/20 03:19:11 dialing manager at localhost:44161 2023/06/20 03:19:11 checking machine... 2023/06/20 03:19:11 checking revisions... [ 47.082747] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:19:11 testing simple program... [ 47.140268] cgroup: Unknown subsys name 'net' [ 47.217608] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:19:06 Registers: info registers vcpu 0 RAX=ffffffff84506c7f RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff84506c7f RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000002244e R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888015c80000 R15=ffff88801928db30 RIP=ffffffff84532440 RFL=00000282 [--S----] 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 00007feebc1cf900 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=00007ffede644000 CR3=000000000def0000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=00007fee3119b5a0 CR3=000000000d882000 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=8344e3dccfb1b08b944dfffe6ab5b2ba XMM02=000000000011d118eff9b2d0a8fce9cb XMM03=000000000011d1e82c67c8bc2e329bc3 XMM04=7e432aab9299d30900000000000ae988 XMM05=dfcdbad4f1609c3700000000001333f0 XMM06=5c1ca8612cda844400000000001325c8 XMM07=e042d86d42eb936e0000000000123da8 XMM08=1d628311ac8e08ec000000000011d1e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000