syzkaller login: [ 31.546234] BUG: Bad rss-counter state mm:000000002c6739c8 type:MM_FILEPAGES val:33 [ 31.547612] BUG: Bad rss-counter state mm:000000002c6739c8 type:MM_ANONPAGES val:22 [ 31.729930] ================================================================== [ 31.730784] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.731757] Read of size 8 at addr ffff88800c7f2798 by task sshd/220 [ 31.732488] [ 31.732699] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.733508] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.734439] Call Trace: [ 31.734739] [ 31.735005] dump_stack_lvl+0x91/0xf0 [ 31.735469] print_report+0xcc/0x620 [ 31.736003] ? __virt_addr_valid+0x102/0x340 [ 31.736621] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.737340] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.738095] kasan_report+0xbe/0xf0 [ 31.738670] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.739443] vma_interval_tree_remove+0xc75/0xec0 [ 31.740184] vma_prepare+0xc54/0x11a0 [ 31.740764] __split_vma+0x5af/0x950 [ 31.741338] ? __pfx___split_vma+0x10/0x10 [ 31.741985] ? find_held_lock+0x2c/0x110 [ 31.742623] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.743319] ? lock_is_held_type+0x9f/0x120 [ 31.743996] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.744745] ? mtree_range_walk+0x632/0x900 [ 31.745414] ? mas_walk+0x5c7/0x7c0 [ 31.745994] do_vmi_munmap+0x1f1/0x2b0 [ 31.746598] mmap_region+0x1f9/0x2660 [ 31.747189] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.747812] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.748691] ? __pfx_lock_acquire+0x10/0x10 [ 31.749341] ? __pfx_mmap_region+0x10/0x10 [ 31.749987] ? security_mmap_addr+0x7d/0xa0 [ 31.750646] ? get_unmapped_area+0x1f5/0x3f0 [ 31.751315] do_mmap+0x854/0xf00 [ 31.751843] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.752470] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.753057] ksys_mmap_pgoff+0x3af/0x500 [ 31.753541] do_syscall_64+0x3f/0x90 [ 31.753992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.754609] RIP: 0033:0x7f490b3acd82 [ 31.755040] 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 [ 31.757077] RSP: 002b:00007ffd4e8e2538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.757960] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f490b3acd82 [ 31.758799] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f490a7e6000 [ 31.759637] RBP: 00007f490a7e6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.760475] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647713c5ec0 [ 31.761313] R13: 00007ffd4e8e2550 R14: 00007ffd4e8e2580 R15: 00007ffd4e8e28e0 [ 31.762156] [ 31.762447] [ 31.762661] Allocated by task 213: [ 31.763077] kasan_save_stack+0x22/0x50 [ 31.763574] kasan_set_track+0x25/0x30 [ 31.764090] __kasan_slab_alloc+0x59/0x70 [ 31.764625] kmem_cache_alloc+0x16b/0x370 [ 31.765145] vm_area_dup+0x20/0x160 [ 31.765600] __split_vma+0x170/0x950 [ 31.766060] split_vma+0xc6/0x110 [ 31.766498] mprotect_fixup+0x8d2/0xb30 [ 31.767004] do_mprotect_pkey+0x87e/0xd40 [ 31.767527] __x64_sys_mprotect+0x78/0xc0 [ 31.768056] do_syscall_64+0x3f/0x90 [ 31.768530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.769175] [ 31.769392] Freed by task 19: [ 31.769775] kasan_save_stack+0x22/0x50 [ 31.770288] kasan_set_track+0x25/0x30 [ 31.770779] kasan_save_free_info+0x2b/0x50 [ 31.771320] __kasan_slab_free+0x10a/0x190 [ 31.771863] kmem_cache_free+0x10d/0x4d0 [ 31.772393] rcu_core+0x8c8/0x2860 [ 31.772849] __do_softirq+0x1b7/0x7d4 [ 31.773318] [ 31.773530] Last potentially related work creation: [ 31.774113] kasan_save_stack+0x22/0x50 [ 31.774612] __kasan_record_aux_stack+0x8e/0xa0 [ 31.775172] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.775823] remove_vma+0x139/0x170 [ 31.776304] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.776851] do_vmi_munmap+0x1f1/0x2b0 [ 31.777333] __vm_munmap+0x138/0x3a0 [ 31.777802] __x64_sys_munmap+0x59/0x80 [ 31.778293] do_syscall_64+0x3f/0x90 [ 31.778763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.779419] [ 31.779638] Second to last potentially related work creation: [ 31.780333] kasan_save_stack+0x22/0x50 [ 31.780839] __kasan_record_aux_stack+0x8e/0xa0 [ 31.781403] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.782052] remove_vma+0x139/0x170 [ 31.782503] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.783050] do_vmi_munmap+0x1f1/0x2b0 [ 31.783535] mmap_region+0x1f9/0x2660 [ 31.784011] do_mmap+0x854/0xf00 [ 31.784437] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.784925] ksys_mmap_pgoff+0x3af/0x500 [ 31.785424] do_syscall_64+0x3f/0x90 [ 31.785893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.786530] [ 31.786747] The buggy address belongs to the object at ffff88800c7f2740 [ 31.786747] which belongs to the cache vm_area_struct of size 168 [ 31.788237] The buggy address is located 88 bytes inside of [ 31.788237] freed 168-byte region [ffff88800c7f2740, ffff88800c7f27e8) [ 31.789626] [ 31.789839] The buggy address belongs to the physical page: [ 31.790495] page:00000000a3af6aae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc7f2 [ 31.791578] memcg:ffff88800dc1b301 [ 31.792014] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.792659] page_type: 0xffffffff() [ 31.793111] raw: 0100000000000200 ffff8880087a0c80 ffffea0000384e00 dead000000000002 [ 31.794021] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc1b301 [ 31.794927] page dumped because: kasan: bad access detected [ 31.795589] [ 31.795802] Memory state around the buggy address: [ 31.796383] ffff88800c7f2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.797243] ffff88800c7f2700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.798094] >ffff88800c7f2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.798948] ^ [ 31.799444] ffff88800c7f2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.800326] ffff88800c7f2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.801170] ================================================================== [ 31.802328] Disabling lock debugging due to kernel taint [ 34.605810] BUG: Bad rss-counter state mm:000000005e3b17ce type:MM_FILEPAGES val:33 [ 34.606454] BUG: Bad rss-counter state mm:000000005e3b17ce type:MM_ANONPAGES val:22 [ 35.160722] BUG: Bad rss-counter state mm:00000000a88f7a7d type:MM_FILEPAGES val:33 [ 35.162036] BUG: Bad rss-counter state mm:00000000a88f7a7d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45510' (ECDSA) to the list of known hosts. 2023/06/21 00:24:57 fuzzer started 2023/06/21 00:24:57 dialing manager at localhost:36067 2023/06/21 00:24:57 checking machine... 2023/06/21 00:24:57 checking revisions... [ 35.820226] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:24:57 testing simple program... [ 35.871067] cgroup: Unknown subsys name 'net' [ 35.919715] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:24:56 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f49683e4018 CR3=000000000fc60000 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=2036353a34323a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a34323a3030203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff81765119 RDX=fffff94000040597 RSI=0000000000000004 RDI=ffffea0000202cb0 RBP=ffffea0000202c80 RSP=ffff88800fd17918 R8 =0000000000000001 R9 =fffff94000040596 R10=ffffea0000202cb3 R11=0000000000000000 R12=ffffea0000202c80 R13=ffff88800e22b000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8176511e RFL=00000213 [----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 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=00007ffa33e94328 CR3=00000000096fa000 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