syzkaller login: [ 38.793557] BUG: Bad rss-counter state mm:00000000601699d8 type:MM_FILEPAGES val:33 [ 38.794778] BUG: Bad rss-counter state mm:00000000601699d8 type:MM_ANONPAGES val:22 [ 38.958173] ================================================================== [ 38.959235] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.960375] Read of size 8 at addr ffff888018dd9968 by task sshd/230 [ 38.961264] [ 38.961486] CPU: 0 PID: 230 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.962344] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.963331] Call Trace: [ 38.963652] [ 38.963951] dump_stack_lvl+0x91/0xf0 [ 38.964444] print_report+0xcc/0x620 [ 38.964930] ? __virt_addr_valid+0x102/0x340 [ 38.965484] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.966100] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.966710] kasan_report+0xbe/0xf0 [ 38.967188] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.967799] vma_interval_tree_remove+0xc75/0xec0 [ 38.968415] vma_prepare+0xc54/0x11a0 [ 38.968892] __split_vma+0x5af/0x950 [ 38.969363] ? __pfx___split_vma+0x10/0x10 [ 38.969894] ? find_held_lock+0x2c/0x110 [ 38.970411] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.970972] ? lock_is_held_type+0x9f/0x120 [ 38.971510] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.972122] ? mtree_range_walk+0x632/0x900 [ 38.972674] ? mas_walk+0x5c7/0x7c0 [ 38.973151] do_vmi_munmap+0x1f1/0x2b0 [ 38.973641] mmap_region+0x1f9/0x2660 [ 38.974126] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.974629] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.975340] ? __pfx_lock_acquire+0x10/0x10 [ 38.975869] ? __pfx_mmap_region+0x10/0x10 [ 38.976401] ? security_mmap_addr+0x7d/0xa0 [ 38.976927] ? get_unmapped_area+0x1f5/0x3f0 [ 38.977474] do_mmap+0x854/0xf00 [ 38.977910] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.978400] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.978960] ksys_mmap_pgoff+0x3af/0x500 [ 38.979479] do_syscall_64+0x3f/0x90 [ 38.979984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.980627] RIP: 0033:0x7fe28003fd82 [ 38.981084] 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 [ 38.983201] RSP: 002b:00007ffc286f5c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.984113] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe28003fd82 [ 38.984956] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe27f479000 [ 38.985808] RBP: 00007fe27f479000 R08: 0000000000000009 R09: 0000000000001000 [ 38.986662] R10: 0000000000000812 R11: 0000000000000206 R12: 00005625796bfd90 [ 38.987510] R13: 00007ffc286f5c30 R14: 00007ffc286f5c60 R15: 00007ffc286f5fc0 [ 38.988384] [ 38.988677] [ 38.988890] Allocated by task 223: [ 38.989319] kasan_save_stack+0x22/0x50 [ 38.989820] kasan_set_track+0x25/0x30 [ 38.990307] __kasan_slab_alloc+0x59/0x70 [ 38.990827] kmem_cache_alloc+0x16b/0x370 [ 38.991340] vm_area_dup+0x20/0x160 [ 38.991795] __split_vma+0x170/0x950 [ 38.992268] split_vma+0xc6/0x110 [ 38.992709] mprotect_fixup+0x8d2/0xb30 [ 38.993208] do_mprotect_pkey+0x87e/0xd40 [ 38.993727] __x64_sys_mprotect+0x78/0xc0 [ 38.994242] do_syscall_64+0x3f/0x90 [ 38.994714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.995352] [ 38.995565] Freed by task 206: [ 38.995965] kasan_save_stack+0x22/0x50 [ 38.996467] kasan_set_track+0x25/0x30 [ 38.996955] kasan_save_free_info+0x2b/0x50 [ 38.997486] __kasan_slab_free+0x10a/0x190 [ 38.998013] kmem_cache_free+0x10d/0x4d0 [ 38.998519] rcu_core+0x8c8/0x2860 [ 38.998961] __do_softirq+0x1b7/0x7d4 [ 38.999434] [ 38.999646] Last potentially related work creation: [ 39.000252] kasan_save_stack+0x22/0x50 [ 39.000755] __kasan_record_aux_stack+0x8e/0xa0 [ 39.001327] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.001968] remove_vma+0x139/0x170 [ 39.002419] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.002975] do_vmi_munmap+0x1f1/0x2b0 [ 39.003460] __vm_munmap+0x138/0x3a0 [ 39.003934] __x64_sys_munmap+0x59/0x80 [ 39.004437] do_syscall_64+0x3f/0x90 [ 39.004910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.005551] [ 39.005764] The buggy address belongs to the object at ffff888018dd9910 [ 39.005764] which belongs to the cache vm_area_struct of size 168 [ 39.007220] The buggy address is located 88 bytes inside of [ 39.007220] freed 168-byte region [ffff888018dd9910, ffff888018dd99b8) [ 39.008635] [ 39.008854] The buggy address belongs to the physical page: [ 39.009496] page:0000000067233aac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18dd9 [ 39.010580] memcg:ffff888018f57001 [ 39.011005] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.011650] page_type: 0xffffffff() [ 39.012126] raw: 0100000000000200 ffff8880087a0c80 ffffea00002ed600 dead000000000004 [ 39.013044] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f57001 [ 39.013950] page dumped because: kasan: bad access detected [ 39.014602] [ 39.014819] Memory state around the buggy address: [ 39.015397] ffff888018dd9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.016265] ffff888018dd9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.017124] >ffff888018dd9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.017982] ^ [ 39.018759] ffff888018dd9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.019608] ffff888018dd9a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.020475] ================================================================== [ 39.021442] Disabling lock debugging due to kernel taint [ 40.907922] BUG: Bad rss-counter state mm:00000000a607f9e9 type:MM_FILEPAGES val:33 [ 40.908470] BUG: Bad rss-counter state mm:00000000a607f9e9 type:MM_ANONPAGES val:22 [ 41.324996] BUG: Bad rss-counter state mm:0000000098404242 type:MM_FILEPAGES val:33 [ 41.326147] BUG: Bad rss-counter state mm:0000000098404242 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47384' (ECDSA) to the list of known hosts. 2023/06/21 06:42:44 fuzzer started 2023/06/21 06:42:44 dialing manager at localhost:36067 2023/06/21 06:42:44 checking machine... 2023/06/21 06:42:44 checking revisions... [ 42.062648] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:42:44 testing simple program... [ 42.106447] cgroup: Unknown subsys name 'net' [ 42.159195] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:42:43 Registers: info registers vcpu 0 RAX=0000000000000200 RBX=ffff888014530260 RCX=0000000000000000 RDX=0000000000000000 RSI=ffff888014530260 RDI=ffffffff81810727 RBP=ffff88800844f780 RSP=ffff88806ce09de8 R8 =0000000023c0916b R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000200 R13=ffffea0000514c00 R14=ffffffff813782f8 R15=ffff8880145302e0 RIP=ffffffff815343b0 RFL=00000046 [---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 00007f6f7a0d4900 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=00007ffe968a9000 CR3=000000000ecb6000 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=dffffc0000000000 RBX=ffff888019ba2068 RCX=0000000000000000 RDX=1ffff11001b1614f RSI=ffffffff81efe786 RDI=ffff88800d8b0a78 RBP=ffff88800e139600 RSP=ffff888016517cb8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800d8b0a00 R13=0000000000000010 R14=ffff888016517d10 R15=0000000000000000 RIP=ffffffff81efe7b2 RFL=00000286 [--S--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 00007f6f7a0d4900 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=00007fd51f8b10c0 CR3=000000000ecb6000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000