syzkaller login: [ 38.479439] BUG: Bad rss-counter state mm:00000000cae7f0bd type:MM_FILEPAGES val:33 [ 38.480682] BUG: Bad rss-counter state mm:00000000cae7f0bd type:MM_ANONPAGES val:22 [ 38.523478] ================================================================== [ 38.524405] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.525350] Read of size 8 at addr ffff888018f1b5c8 by task sshd/221 [ 38.526121] [ 38.526349] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.527401] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.528395] Call Trace: [ 38.528722] [ 38.529028] dump_stack_lvl+0x91/0xf0 [ 38.529525] print_report+0xcc/0x620 [ 38.530040] ? __virt_addr_valid+0x102/0x340 [ 38.530616] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.531265] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.531883] kasan_report+0xbe/0xf0 [ 38.532364] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.532994] vma_interval_tree_remove+0xc75/0xec0 [ 38.533604] vma_prepare+0xc54/0x11a0 [ 38.534090] __split_vma+0x5af/0x950 [ 38.534570] ? __pfx___split_vma+0x10/0x10 [ 38.535105] ? find_held_lock+0x2c/0x110 [ 38.535633] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.536205] ? lock_is_held_type+0x9f/0x120 [ 38.536744] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.537358] ? mtree_range_walk+0x632/0x900 [ 38.537909] ? mas_walk+0x5c7/0x7c0 [ 38.538382] do_vmi_munmap+0x1f1/0x2b0 [ 38.538875] mmap_region+0x1f9/0x2660 [ 38.539370] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.539884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.540597] ? __pfx_lock_acquire+0x10/0x10 [ 38.541132] ? __pfx_mmap_region+0x10/0x10 [ 38.541666] ? security_mmap_addr+0x7d/0xa0 [ 38.542197] ? get_unmapped_area+0x1f5/0x3f0 [ 38.542750] do_mmap+0x854/0xf00 [ 38.543189] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.543706] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.544289] ksys_mmap_pgoff+0x3af/0x500 [ 38.544808] do_syscall_64+0x3f/0x90 [ 38.545305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.545964] RIP: 0033:0x7f396b529d82 [ 38.546433] 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 [ 38.548604] RSP: 002b:00007ffc73df5848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.549527] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f396b529d82 [ 38.550384] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f396a963000 [ 38.551250] RBP: 00007f396a963000 R08: 0000000000000009 R09: 0000000000001000 [ 38.552112] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560409275ec0 [ 38.552985] R13: 00007ffc73df5860 R14: 00007ffc73df5890 R15: 00007ffc73df5bf0 [ 38.553836] [ 38.554129] [ 38.554347] Allocated by task 214: [ 38.554779] kasan_save_stack+0x22/0x50 [ 38.555301] kasan_set_track+0x25/0x30 [ 38.555794] __kasan_slab_alloc+0x59/0x70 [ 38.556321] kmem_cache_alloc+0x16b/0x370 [ 38.556834] vm_area_dup+0x20/0x160 [ 38.557289] __split_vma+0x170/0x950 [ 38.557755] split_vma+0xc6/0x110 [ 38.558198] mprotect_fixup+0x8d2/0xb30 [ 38.558702] do_mprotect_pkey+0x87e/0xd40 [ 38.559229] __x64_sys_mprotect+0x78/0xc0 [ 38.559748] do_syscall_64+0x3f/0x90 [ 38.560224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.560861] [ 38.561078] Freed by task 214: [ 38.561471] kasan_save_stack+0x22/0x50 [ 38.561974] kasan_set_track+0x25/0x30 [ 38.562472] kasan_save_free_info+0x2b/0x50 [ 38.563006] __kasan_slab_free+0x10a/0x190 [ 38.563566] kmem_cache_free+0x10d/0x4d0 [ 38.564076] rcu_core+0x8c8/0x2860 [ 38.564519] __do_softirq+0x1b7/0x7d4 [ 38.564996] [ 38.565214] Last potentially related work creation: [ 38.565932] kasan_save_stack+0x22/0x50 [ 38.566627] __kasan_record_aux_stack+0x8e/0xa0 [ 38.567426] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.568385] remove_vma+0x139/0x170 [ 38.569001] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.569590] do_vmi_munmap+0x1f1/0x2b0 [ 38.570101] __vm_munmap+0x138/0x3a0 [ 38.570571] __x64_sys_munmap+0x59/0x80 [ 38.571102] do_syscall_64+0x3f/0x90 [ 38.571617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.572327] [ 38.572549] The buggy address belongs to the object at ffff888018f1b570 [ 38.572549] which belongs to the cache vm_area_struct of size 168 [ 38.574144] The buggy address is located 88 bytes inside of [ 38.574144] freed 168-byte region [ffff888018f1b570, ffff888018f1b618) [ 38.575589] [ 38.575809] The buggy address belongs to the physical page: [ 38.576477] page:00000000910ac6ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f1b [ 38.577596] memcg:ffff88800d075801 [ 38.578033] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.578682] page_type: 0xffffffff() [ 38.579131] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.580049] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d075801 [ 38.580956] page dumped because: kasan: bad access detected [ 38.581619] [ 38.581838] Memory state around the buggy address: [ 38.582421] ffff888018f1b480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.583292] ffff888018f1b500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.584146] >ffff888018f1b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.584995] ^ [ 38.585657] ffff888018f1b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.586526] ffff888018f1b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.587384] ================================================================== [ 38.588344] Disabling lock debugging due to kernel taint [ 40.636357] BUG: Bad rss-counter state mm:0000000066b982f3 type:MM_FILEPAGES val:33 [ 40.637348] BUG: Bad rss-counter state mm:0000000066b982f3 type:MM_ANONPAGES val:22 [ 41.042364] BUG: Bad rss-counter state mm:000000005b11ab22 type:MM_FILEPAGES val:33 [ 41.043522] BUG: Bad rss-counter state mm:000000005b11ab22 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55706' (ECDSA) to the list of known hosts. 2023/06/19 14:22:41 fuzzer started 2023/06/19 14:22:41 dialing manager at localhost:44161 2023/06/19 14:22:41 checking machine... 2023/06/19 14:22:41 checking revisions... [ 41.800964] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:22:41 testing simple program... [ 41.858406] cgroup: Unknown subsys name 'net' [ 41.899639] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:22:34 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888015c3fd01 RSI=ffff888015c3fde0 RDI=ffff888015c3fde0 RBP=ffff888015c3f628 RSP=ffff888015c3f560 R8 =0000000000000001 R9 =ffff888015c3f610 R10=0000000000038001 R11=000000000008ab76 R12=ffff888015c3f630 R13=ffff888015c3f618 R14=ffff888015c3fde0 R15=ffff888015c3f5d0 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007f3aaf41a900 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=00007f3aae8a1eb0 CR3=000000000c60e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=f0ff42e431c4307500000000000ae988 XMM05=91136640ba6c354300000000001356a0 XMM06=e4cb8bb95a7664b60000000000134808 XMM07=fb795ef6d65770560000000000124d10 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff860d167c RDX=ffff88806cf09a98 RSI=1ffff1100d9e1355 RDI=1ffff1100d9e1355 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff860d1680 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09f80 R15=ffff88806cf09a50 RIP=ffffffff811310a7 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 00007ff87518a900 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=00007ffc0a16f000 CR3=000000000d992000 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=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