syzkaller login: [ 31.232981] BUG: Bad rss-counter state mm:00000000403bde47 type:MM_FILEPAGES val:33 [ 31.234173] BUG: Bad rss-counter state mm:00000000403bde47 type:MM_ANONPAGES val:22 [ 31.346114] ================================================================== [ 31.347221] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.348173] Read of size 8 at addr ffff88800d642a50 by task sshd/221 [ 31.349032] [ 31.349247] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.350159] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.351233] Call Trace: [ 31.351553] <TASK> [ 31.351832] dump_stack_lvl+0x91/0xf0 [ 31.352336] print_report+0xcc/0x620 [ 31.352821] ? __virt_addr_valid+0x102/0x340 [ 31.353369] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.353990] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.354622] kasan_report+0xbe/0xf0 [ 31.355100] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.355720] vma_interval_tree_remove+0xc75/0xec0 [ 31.356355] vma_prepare+0xc54/0x11a0 [ 31.356859] __split_vma+0x5af/0x950 [ 31.357345] ? __pfx___split_vma+0x10/0x10 [ 31.357893] ? find_held_lock+0x2c/0x110 [ 31.358439] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.359018] ? lock_is_held_type+0x9f/0x120 [ 31.359569] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.360189] ? mtree_range_walk+0x632/0x900 [ 31.360753] ? mas_walk+0x5c7/0x7c0 [ 31.361244] do_vmi_munmap+0x1f1/0x2b0 [ 31.361751] mmap_region+0x1f9/0x2660 [ 31.362241] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.362782] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.363513] ? __pfx_lock_acquire+0x10/0x10 [ 31.364061] ? __pfx_mmap_region+0x10/0x10 [ 31.364608] ? security_mmap_addr+0x7d/0xa0 [ 31.365150] ? get_unmapped_area+0x1f5/0x3f0 [ 31.365709] do_mmap+0x854/0xf00 [ 31.366157] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.366743] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.367324] ksys_mmap_pgoff+0x3af/0x500 [ 31.367833] do_syscall_64+0x3f/0x90 [ 31.368323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.368980] RIP: 0033:0x7f95ad46ed82 [ 31.369444] 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 [ 31.371657] RSP: 002b:00007ffecacd7958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.372582] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f95ad46ed82 [ 31.373449] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f95ac8a8000 [ 31.374326] RBP: 00007f95ac8a8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.375201] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1466ccec0 [ 31.376069] R13: 00007ffecacd7970 R14: 00007ffecacd79a0 R15: 00007ffecacd7d00 [ 31.376949] </TASK> [ 31.377243] [ 31.377462] Allocated by task 214: [ 31.377903] kasan_save_stack+0x22/0x50 [ 31.378440] kasan_set_track+0x25/0x30 [ 31.378944] __kasan_slab_alloc+0x59/0x70 [ 31.379489] kmem_cache_alloc+0x16b/0x370 [ 31.380023] vm_area_dup+0x20/0x160 [ 31.380489] __split_vma+0x170/0x950 [ 31.380967] split_vma+0xc6/0x110 [ 31.381413] mprotect_fixup+0x8d2/0xb30 [ 31.381927] do_mprotect_pkey+0x87e/0xd40 [ 31.382468] __x64_sys_mprotect+0x78/0xc0 [ 31.382997] do_syscall_64+0x3f/0x90 [ 31.383489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.384162] [ 31.384387] Freed by task 214: [ 31.384784] kasan_save_stack+0x22/0x50 [ 31.385303] kasan_set_track+0x25/0x30 [ 31.385810] kasan_save_free_info+0x2b/0x50 [ 31.386370] __kasan_slab_free+0x10a/0x190 [ 31.386916] kmem_cache_free+0x10d/0x4d0 [ 31.387431] rcu_core+0x8c8/0x2860 [ 31.387886] __do_softirq+0x1b7/0x7d4 [ 31.388372] [ 31.388597] Last potentially related work creation: [ 31.389200] kasan_save_stack+0x22/0x50 [ 31.389718] __kasan_record_aux_stack+0x8e/0xa0 [ 31.390309] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.390988] remove_vma+0x139/0x170 [ 31.391449] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.392023] do_vmi_munmap+0x1f1/0x2b0 [ 31.392522] __vm_munmap+0x138/0x3a0 [ 31.393002] __x64_sys_munmap+0x59/0x80 [ 31.393510] do_syscall_64+0x3f/0x90 [ 31.394012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.394691] [ 31.394909] The buggy address belongs to the object at ffff88800d6429f8 [ 31.394909] which belongs to the cache vm_area_struct of size 168 [ 31.396426] The buggy address is located 88 bytes inside of [ 31.396426] freed 168-byte region [ffff88800d6429f8, ffff88800d642aa0) [ 31.397874] [ 31.398092] The buggy address belongs to the physical page: [ 31.398778] page:00000000e53cd74a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd642 [ 31.399878] memcg:ffff888017b12b01 [ 31.400311] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.400977] page_type: 0xffffffff() [ 31.401427] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.402405] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017b12b01 [ 31.403349] page dumped because: kasan: bad access detected [ 31.404029] [ 31.404254] Memory state around the buggy address: [ 31.404853] ffff88800d642900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.405740] ffff88800d642980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.406622] >ffff88800d642a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.407481] ^ [ 31.408194] ffff88800d642a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.409066] ffff88800d642b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.409941] ================================================================== [ 31.410973] Disabling lock debugging due to kernel taint [ 34.072377] BUG: Bad rss-counter state mm:00000000b3947d2d type:MM_FILEPAGES val:33 [ 34.073343] BUG: Bad rss-counter state mm:00000000b3947d2d type:MM_ANONPAGES val:22 [ 34.566646] BUG: Bad rss-counter state mm:00000000d6659fcb type:MM_FILEPAGES val:33 [ 34.567655] BUG: Bad rss-counter state mm:00000000d6659fcb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31035' (ECDSA) to the list of known hosts. 2023/06/21 04:00:01 fuzzer started 2023/06/21 04:00:01 dialing manager at localhost:36067 2023/06/21 04:00:01 checking machine... 2023/06/21 04:00:01 checking revisions... [ 35.309052] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:00:02 testing simple program... [ 35.354291] cgroup: Unknown subsys name 'net' [ 35.391999] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:00:01 Registers: info registers vcpu 0 RAX=00000000000b5305 RBX=0000000000000002 RCX=ffffffff8451105d RDX=00000000000b5317 RSI=0000000000035110 RDI=000000000021f945 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b2f26 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130859 RFL=00000293 [--S-A-C] 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 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=00007fe0c9d50cc0 CR3=0000000015fb8000 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=2031303a30303a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a30303a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000003 RCX=0000000000000000 RDX=ffff888015ef9b40 RSI=ffffffff844a50a4 RDI=0000000000000005 RBP=ffff88800d94141c RSP=ffff888008f27ce0 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000003 R11=0000000000000000 R12=ffff88800d941400 R13=ffffed10011e4fcb R14=ffff88800d94141c R15=ffff888008f27e59 RIP=ffffffff814c0880 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 00007fbbd0a4a900 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=00005642d36a3f40 CR3=0000000019c24000 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=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