syzkaller login: [ 32.143084] BUG: Bad rss-counter state mm:000000009d591a34 type:MM_FILEPAGES val:33 [ 32.145086] BUG: Bad rss-counter state mm:000000009d591a34 type:MM_ANONPAGES val:22 [ 32.302912] ================================================================== [ 32.303823] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.304768] Read of size 8 at addr ffff88800d49ea50 by task sshd/221 [ 32.305543] [ 32.305761] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.306782] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.307768] Call Trace: [ 32.308093] [ 32.308380] dump_stack_lvl+0x91/0xf0 [ 32.308909] print_report+0xcc/0x620 [ 32.309405] ? __virt_addr_valid+0x102/0x340 [ 32.309964] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.310583] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.311203] kasan_report+0xbe/0xf0 [ 32.311678] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.312304] vma_interval_tree_remove+0xc75/0xec0 [ 32.312916] vma_prepare+0xc54/0x11a0 [ 32.313394] __split_vma+0x5af/0x950 [ 32.313866] ? __pfx___split_vma+0x10/0x10 [ 32.314392] ? find_held_lock+0x2c/0x110 [ 32.314915] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.315482] ? lock_is_held_type+0x9f/0x120 [ 32.316026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.316645] ? mtree_range_walk+0x632/0x900 [ 32.317210] ? mas_walk+0x5c7/0x7c0 [ 32.317698] do_vmi_munmap+0x1f1/0x2b0 [ 32.318202] mmap_region+0x1f9/0x2660 [ 32.318683] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.319203] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.319918] ? __pfx_lock_acquire+0x10/0x10 [ 32.320466] ? __pfx_mmap_region+0x10/0x10 [ 32.321018] ? security_mmap_addr+0x7d/0xa0 [ 32.321551] ? get_unmapped_area+0x1f5/0x3f0 [ 32.322107] do_mmap+0x854/0xf00 [ 32.322556] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.323051] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.323620] ksys_mmap_pgoff+0x3af/0x500 [ 32.324134] do_syscall_64+0x3f/0x90 [ 32.324611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.325281] RIP: 0033:0x7fbc4bb99d82 [ 32.325737] 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 [ 32.327842] RSP: 002b:00007fff4dec50f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.328759] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc4bb99d82 [ 32.329620] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc4afd3000 [ 32.330471] RBP: 00007fbc4afd3000 R08: 0000000000000009 R09: 0000000000001000 [ 32.331307] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557e6d1a0f70 [ 32.332142] R13: 00007fff4dec5110 R14: 00007fff4dec5140 R15: 00007fff4dec54a0 [ 32.333032] [ 32.333336] [ 32.333549] Allocated by task 214: [ 32.333979] kasan_save_stack+0x22/0x50 [ 32.334485] kasan_set_track+0x25/0x30 [ 32.334988] __kasan_slab_alloc+0x59/0x70 [ 32.335519] kmem_cache_alloc+0x16b/0x370 [ 32.336030] vm_area_dup+0x20/0x160 [ 32.336497] __split_vma+0x170/0x950 [ 32.336987] split_vma+0xc6/0x110 [ 32.337429] mprotect_fixup+0x8d2/0xb30 [ 32.337933] do_mprotect_pkey+0x87e/0xd40 [ 32.338456] __x64_sys_mprotect+0x78/0xc0 [ 32.338976] do_syscall_64+0x3f/0x90 [ 32.339452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.340093] [ 32.340311] Freed by task 214: [ 32.340706] kasan_save_stack+0x22/0x50 [ 32.341217] kasan_set_track+0x25/0x30 [ 32.341713] kasan_save_free_info+0x2b/0x50 [ 32.342253] __kasan_slab_free+0x10a/0x190 [ 32.342788] kmem_cache_free+0x10d/0x4d0 [ 32.343301] rcu_core+0x8c8/0x2860 [ 32.343748] __do_softirq+0x1b7/0x7d4 [ 32.344223] [ 32.344436] Last potentially related work creation: [ 32.345030] kasan_save_stack+0x22/0x50 [ 32.345532] __kasan_record_aux_stack+0x8e/0xa0 [ 32.346109] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.346751] remove_vma+0x139/0x170 [ 32.347201] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.347834] do_vmi_munmap+0x1f1/0x2b0 [ 32.348334] __vm_munmap+0x138/0x3a0 [ 32.348796] __x64_sys_munmap+0x59/0x80 [ 32.349312] do_syscall_64+0x3f/0x90 [ 32.349780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.350432] [ 32.350649] The buggy address belongs to the object at ffff88800d49e9f8 [ 32.350649] which belongs to the cache vm_area_struct of size 168 [ 32.352109] The buggy address is located 88 bytes inside of [ 32.352109] freed 168-byte region [ffff88800d49e9f8, ffff88800d49eaa0) [ 32.353521] [ 32.353742] The buggy address belongs to the physical page: [ 32.354403] page:00000000e70c1def refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd49e [ 32.355488] memcg:ffff88800eaab001 [ 32.355917] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.356565] page_type: 0xffffffff() [ 32.357042] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.357961] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eaab001 [ 32.358869] page dumped because: kasan: bad access detected [ 32.359526] [ 32.359749] Memory state around the buggy address: [ 32.360330] ffff88800d49e900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.361200] ffff88800d49e980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.362058] >ffff88800d49ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.362907] ^ [ 32.363611] ffff88800d49ea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.364462] ffff88800d49eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.365324] ================================================================== [ 32.366320] Disabling lock debugging due to kernel taint [ 34.798468] BUG: Bad rss-counter state mm:00000000fc8d4f45 type:MM_FILEPAGES val:33 [ 34.799418] BUG: Bad rss-counter state mm:00000000fc8d4f45 type:MM_ANONPAGES val:22 [ 35.278183] BUG: Bad rss-counter state mm:0000000001f4949d type:MM_FILEPAGES val:33 [ 35.279240] BUG: Bad rss-counter state mm:0000000001f4949d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22667' (ECDSA) to the list of known hosts. 2023/06/19 21:05:22 fuzzer started 2023/06/19 21:05:23 dialing manager at localhost:44161 2023/06/19 21:05:23 checking machine... 2023/06/19 21:05:23 checking revisions... [ 35.996796] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:05:23 testing simple program... [ 36.045196] cgroup: Unknown subsys name 'net' [ 36.128804] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:05:21 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f008de7be30 CR3=000000000da14000 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=2032323a35303a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a35303a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b22f0 RDX=1ffff1100d9e135c RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff863b22f4 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000008aa86 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=0000000000000005 R15=ffff88806cf09a98 RIP=ffffffff81130b54 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 00007ff39bd9b900 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=00007fffa92d9000 CR3=0000000016ca4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000