syzkaller login: [ 31.159890] BUG: Bad rss-counter state mm:0000000057e8b8e9 type:MM_FILEPAGES val:33 [ 31.160847] BUG: Bad rss-counter state mm:0000000057e8b8e9 type:MM_ANONPAGES val:22 [ 31.328375] ================================================================== [ 31.329301] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.330258] Read of size 8 at addr ffff888015a7d5c8 by task sshd/221 [ 31.331141] [ 31.331395] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.332278] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.333285] Call Trace: [ 31.333635] [ 31.333922] dump_stack_lvl+0x91/0xf0 [ 31.334414] print_report+0xcc/0x620 [ 31.334916] ? __virt_addr_valid+0x102/0x340 [ 31.335486] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.336131] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.336765] kasan_report+0xbe/0xf0 [ 31.337248] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.337896] vma_interval_tree_remove+0xc75/0xec0 [ 31.338513] vma_prepare+0xc54/0x11a0 [ 31.339013] __split_vma+0x5af/0x950 [ 31.339515] ? __pfx___split_vma+0x10/0x10 [ 31.340063] ? find_held_lock+0x2c/0x110 [ 31.340606] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.341179] ? lock_is_held_type+0x9f/0x120 [ 31.341736] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.342345] ? mtree_range_walk+0x632/0x900 [ 31.342906] ? mas_walk+0x5c7/0x7c0 [ 31.343405] do_vmi_munmap+0x1f1/0x2b0 [ 31.343918] mmap_region+0x1f9/0x2660 [ 31.344406] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.344930] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.345668] ? __pfx_lock_acquire+0x10/0x10 [ 31.346202] ? __pfx_mmap_region+0x10/0x10 [ 31.346747] ? security_mmap_addr+0x7d/0xa0 [ 31.347293] ? get_unmapped_area+0x1f5/0x3f0 [ 31.347866] do_mmap+0x854/0xf00 [ 31.348309] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.348837] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.349405] ksys_mmap_pgoff+0x3af/0x500 [ 31.349940] do_syscall_64+0x3f/0x90 [ 31.350416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.351074] RIP: 0033:0x7f58be980d82 [ 31.351570] 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 [ 31.353850] RSP: 002b:00007ffdb1f47118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.354941] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f58be980d82 [ 31.355966] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f58bddba000 [ 31.356988] RBP: 00007f58bddba000 R08: 0000000000000009 R09: 0000000000001000 [ 31.358023] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f6496a9ec0 [ 31.359004] R13: 00007ffdb1f47130 R14: 00007ffdb1f47160 R15: 00007ffdb1f474c0 [ 31.360005] [ 31.360337] [ 31.360611] Allocated by task 214: [ 31.361115] kasan_save_stack+0x22/0x50 [ 31.361735] kasan_set_track+0x25/0x30 [ 31.362313] __kasan_slab_alloc+0x59/0x70 [ 31.363089] kmem_cache_alloc+0x16b/0x370 [ 31.363951] vm_area_dup+0x20/0x160 [ 31.364670] __split_vma+0x170/0x950 [ 31.365422] split_vma+0xc6/0x110 [ 31.366130] mprotect_fixup+0x8d2/0xb30 [ 31.366916] do_mprotect_pkey+0x87e/0xd40 [ 31.367714] __x64_sys_mprotect+0x78/0xc0 [ 31.368411] do_syscall_64+0x3f/0x90 [ 31.368995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.369726] [ 31.369974] Freed by task 19: [ 31.370408] kasan_save_stack+0x22/0x50 [ 31.370997] kasan_set_track+0x25/0x30 [ 31.371603] kasan_save_free_info+0x2b/0x50 [ 31.372203] __kasan_slab_free+0x10a/0x190 [ 31.372831] kmem_cache_free+0x10d/0x4d0 [ 31.373400] rcu_core+0x8c8/0x2860 [ 31.373914] __do_softirq+0x1b7/0x7d4 [ 31.374452] [ 31.374709] Last potentially related work creation: [ 31.375410] kasan_save_stack+0x22/0x50 [ 31.376009] __kasan_record_aux_stack+0x8e/0xa0 [ 31.376681] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.377399] remove_vma+0x139/0x170 [ 31.377929] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.378565] do_vmi_munmap+0x1f1/0x2b0 [ 31.379114] __vm_munmap+0x138/0x3a0 [ 31.379668] __x64_sys_munmap+0x59/0x80 [ 31.380227] do_syscall_64+0x3f/0x90 [ 31.380771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.381492] [ 31.381744] The buggy address belongs to the object at ffff888015a7d570 [ 31.381744] which belongs to the cache vm_area_struct of size 168 [ 31.383407] The buggy address is located 88 bytes inside of [ 31.383407] freed 168-byte region [ffff888015a7d570, ffff888015a7d618) [ 31.385083] [ 31.385336] The buggy address belongs to the physical page: [ 31.386110] page:00000000ee8a9706 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a7d [ 31.387419] memcg:ffff88800ca22301 [ 31.387953] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.388733] page_type: 0xffffffff() [ 31.389262] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.390432] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca22301 [ 31.391490] page dumped because: kasan: bad access detected [ 31.392255] [ 31.392503] Memory state around the buggy address: [ 31.393204] ffff888015a7d480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.394202] ffff888015a7d500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.395217] >ffff888015a7d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.396198] ^ [ 31.396986] ffff888015a7d600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.397975] ffff888015a7d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.398956] ================================================================== [ 31.400166] Disabling lock debugging due to kernel taint [ 33.636913] BUG: Bad rss-counter state mm:00000000082f3458 type:MM_FILEPAGES val:33 [ 33.638131] BUG: Bad rss-counter state mm:00000000082f3458 type:MM_ANONPAGES val:22 [ 34.084023] BUG: Bad rss-counter state mm:00000000b4c042cd type:MM_FILEPAGES val:33 [ 34.084997] BUG: Bad rss-counter state mm:00000000b4c042cd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36455' (ECDSA) to the list of known hosts. 2023/06/20 07:34:47 fuzzer started 2023/06/20 07:34:47 dialing manager at localhost:44161 2023/06/20 07:34:47 checking machine... 2023/06/20 07:34:47 checking revisions... [ 34.813036] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:34:47 testing simple program... [ 34.863242] cgroup: Unknown subsys name 'net' [ 34.900848] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:34:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff11003018e9e RDX=dffffc0000000000 RSI=ffffffff81808268 RDI=ffff8880180c7498 RBP=ffff8880180c74f0 RSP=ffff8880180c7428 R8 =0000000000000001 R9 =ffff8880180c74d8 R10=0000000000038001 R11=0000000000020de7 R12=ffff8880180c74f8 R13=ffff8880180c74e0 R14=ffff8880180c74d9 R15=ffff8880180c7498 RIP=ffffffff81130706 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 00007fb7435ff900 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=00007ffd77943000 CR3=000000001c850000 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=00007f825e42fb70 CR3=0000000015b94000 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=2036343a34333a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a34333a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000