syzkaller login: [ 38.945195] BUG: Bad rss-counter state mm:00000000c2fc3f88 type:MM_FILEPAGES val:33 [ 38.946374] BUG: Bad rss-counter state mm:00000000c2fc3f88 type:MM_ANONPAGES val:22 [ 38.988124] ================================================================== [ 38.989479] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.990662] Read of size 8 at addr ffff88800965e310 by task sshd/220 [ 38.991511] [ 38.991726] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.992698] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.993742] Call Trace: [ 38.994092] [ 38.994414] dump_stack_lvl+0x91/0xf0 [ 38.994984] print_report+0xcc/0x620 [ 38.995486] ? __virt_addr_valid+0x102/0x340 [ 38.996073] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.996686] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.997424] kasan_report+0xbe/0xf0 [ 38.997897] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.998515] vma_interval_tree_remove+0xc75/0xec0 [ 38.999105] vma_prepare+0xc54/0x11a0 [ 38.999575] __split_vma+0x5af/0x950 [ 39.000037] ? __pfx___split_vma+0x10/0x10 [ 39.000583] ? find_held_lock+0x2c/0x110 [ 39.001101] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.001660] ? lock_is_held_type+0x9f/0x120 [ 39.002193] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.002797] ? mtree_range_walk+0x632/0x900 [ 39.003351] ? mas_walk+0x5c7/0x7c0 [ 39.003819] do_vmi_munmap+0x1f1/0x2b0 [ 39.004302] mmap_region+0x1f9/0x2660 [ 39.004789] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.005295] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.006006] ? __pfx_lock_acquire+0x10/0x10 [ 39.006533] ? __pfx_mmap_region+0x10/0x10 [ 39.007055] ? security_mmap_addr+0x7d/0xa0 [ 39.007584] ? get_unmapped_area+0x1f5/0x3f0 [ 39.008132] do_mmap+0x854/0xf00 [ 39.008588] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.009078] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.009632] ksys_mmap_pgoff+0x3af/0x500 [ 39.010129] do_syscall_64+0x3f/0x90 [ 39.010601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.011242] RIP: 0033:0x7f8dd11d6d82 [ 39.011698] 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 [ 39.013812] RSP: 002b:00007ffcdfd618d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.014704] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8dd11d6d82 [ 39.015541] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8dd0610000 [ 39.016380] RBP: 00007f8dd0610000 R08: 0000000000000009 R09: 0000000000001000 [ 39.017205] R10: 0000000000000812 R11: 0000000000000206 R12: 00005610d3ca3ec0 [ 39.018049] R13: 00007ffcdfd618f0 R14: 00007ffcdfd61920 R15: 00007ffcdfd61c80 [ 39.018893] [ 39.019180] [ 39.019394] Allocated by task 213: [ 39.019819] kasan_save_stack+0x22/0x50 [ 39.020317] kasan_set_track+0x25/0x30 [ 39.020833] __kasan_slab_alloc+0x59/0x70 [ 39.021350] kmem_cache_alloc+0x16b/0x370 [ 39.021867] vm_area_dup+0x20/0x160 [ 39.022319] __split_vma+0x170/0x950 [ 39.022780] split_vma+0xc6/0x110 [ 39.023214] mprotect_fixup+0x8d2/0xb30 [ 39.023712] do_mprotect_pkey+0x87e/0xd40 [ 39.024225] __x64_sys_mprotect+0x78/0xc0 [ 39.024740] do_syscall_64+0x3f/0x90 [ 39.025213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.025841] [ 39.026056] Freed by task 213: [ 39.026440] kasan_save_stack+0x22/0x50 [ 39.026938] kasan_set_track+0x25/0x30 [ 39.027423] kasan_save_free_info+0x2b/0x50 [ 39.027942] __kasan_slab_free+0x10a/0x190 [ 39.028471] kmem_cache_free+0x10d/0x4d0 [ 39.028967] rcu_core+0x8c8/0x2860 [ 39.029403] __do_softirq+0x1b7/0x7d4 [ 39.029875] [ 39.030088] Last potentially related work creation: [ 39.030669] kasan_save_stack+0x22/0x50 [ 39.031167] __kasan_record_aux_stack+0x8e/0xa0 [ 39.031803] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.032454] remove_vma+0x139/0x170 [ 39.032906] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.033461] do_vmi_munmap+0x1f1/0x2b0 [ 39.033942] __vm_munmap+0x138/0x3a0 [ 39.034405] __x64_sys_munmap+0x59/0x80 [ 39.034895] do_syscall_64+0x3f/0x90 [ 39.035371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.036007] [ 39.036220] Second to last potentially related work creation: [ 39.036908] kasan_save_stack+0x22/0x50 [ 39.037400] __kasan_record_aux_stack+0x8e/0xa0 [ 39.037967] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.038600] remove_vma+0x139/0x170 [ 39.039048] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.039599] do_vmi_munmap+0x1f1/0x2b0 [ 39.040075] mmap_region+0x1f9/0x2660 [ 39.040560] do_mmap+0x854/0xf00 [ 39.040986] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.041474] ksys_mmap_pgoff+0x3af/0x500 [ 39.041965] do_syscall_64+0x3f/0x90 [ 39.042439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.043075] [ 39.043288] The buggy address belongs to the object at ffff88800965e2b8 [ 39.043288] which belongs to the cache vm_area_struct of size 168 [ 39.044752] The buggy address is located 88 bytes inside of [ 39.044752] freed 168-byte region [ffff88800965e2b8, ffff88800965e360) [ 39.046150] [ 39.046369] The buggy address belongs to the physical page: [ 39.047025] page:00000000c642fc91 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x965e [ 39.048098] memcg:ffff88800d47e101 [ 39.048523] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.049156] page_type: 0xffffffff() [ 39.049599] raw: 0100000000000200 ffff8880087a0c80 ffffea000039e1c0 dead000000000002 [ 39.050508] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d47e101 [ 39.051411] page dumped because: kasan: bad access detected [ 39.052068] [ 39.052281] Memory state around the buggy address: [ 39.052871] ffff88800965e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.053722] ffff88800965e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.054576] >ffff88800965e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.055413] ^ [ 39.055870] ffff88800965e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.056735] ffff88800965e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.057576] ================================================================== [ 39.058562] Disabling lock debugging due to kernel taint [ 40.300622] BUG: Bad rss-counter state mm:00000000afc0c057 type:MM_FILEPAGES val:33 [ 40.301140] BUG: Bad rss-counter state mm:00000000afc0c057 type:MM_ANONPAGES val:22 [ 40.691489] BUG: Bad rss-counter state mm:000000003c745866 type:MM_FILEPAGES val:33 [ 40.693262] BUG: Bad rss-counter state mm:000000003c745866 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24857' (ECDSA) to the list of known hosts. 2023/06/20 18:32:13 fuzzer started 2023/06/20 18:32:13 dialing manager at localhost:36067 2023/06/20 18:32:13 checking machine... 2023/06/20 18:32:13 checking revisions... [ 41.428680] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:32:13 testing simple program... [ 41.475864] cgroup: Unknown subsys name 'net' [ 41.521905] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:32:13 Registers: info registers vcpu 0 RAX=0000000080010000 RBX=0000000000000000 RCX=ffffffff813fa242 RDX=0000000000000000 RSI=00000009730df440 RDI=ffff88806ce28140 RBP=00000009730df440 RSP=ffff88806ce09f10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88806ce28140 R13=0000000000000003 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff813f3f64 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 00007fb427637900 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=00007fb427bec650 CR3=000000000edc6000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff815a72a6 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a29d4 RDI=ffffffff852bf4e8 RBP=ffff88800d88fd28 RSP=ffff88800d88fc58 R8 =0000000000000006 R9 =0000000000000101 R10=00000000000000ee R11=0000000000000000 R12=0000000000000015 R13=ffff88800d88fd60 R14=0000000000000015 R15=ffffc9000068f6f0 RIP=ffffffff814c0860 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 00007feed6ea4900 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=00007feed63c3000 CR3=000000000d7b0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=36b08b0cb1faf24900000000000ae988 XMM05=e711f4a68b1254e50000000000133e80 XMM06=19e9129bd510f23500000000001329a8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000