syzkaller login: [ 38.846101] BUG: Bad rss-counter state mm:00000000f3070c20 type:MM_FILEPAGES val:33 [ 38.848345] BUG: Bad rss-counter state mm:00000000f3070c20 type:MM_ANONPAGES val:22 [ 39.008846] ================================================================== [ 39.009954] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.011058] Read of size 8 at addr ffff88800e50d140 by task sshd/219 [ 39.012077] [ 39.012299] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.013182] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.014214] Call Trace: [ 39.014551] [ 39.014836] dump_stack_lvl+0x91/0xf0 [ 39.015323] print_report+0xcc/0x620 [ 39.015807] ? __virt_addr_valid+0x102/0x340 [ 39.016372] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.016989] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.017602] kasan_report+0xbe/0xf0 [ 39.018083] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.018719] vma_interval_tree_remove+0xc75/0xec0 [ 39.019323] vma_prepare+0xc54/0x11a0 [ 39.019808] __split_vma+0x5af/0x950 [ 39.020312] ? __pfx___split_vma+0x10/0x10 [ 39.020844] ? find_held_lock+0x2c/0x110 [ 39.021370] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.021940] ? lock_is_held_type+0x9f/0x120 [ 39.022481] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.023101] ? mtree_range_walk+0x632/0x900 [ 39.023664] ? mas_walk+0x5c7/0x7c0 [ 39.024158] do_vmi_munmap+0x1f1/0x2b0 [ 39.024660] mmap_region+0x1f9/0x2660 [ 39.025147] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.025678] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.026417] ? __pfx_lock_acquire+0x10/0x10 [ 39.026950] ? __pfx_mmap_region+0x10/0x10 [ 39.027493] ? security_mmap_addr+0x7d/0xa0 [ 39.028040] ? get_unmapped_area+0x1f5/0x3f0 [ 39.028587] do_mmap+0x854/0xf00 [ 39.029022] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.029511] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.030076] ksys_mmap_pgoff+0x3af/0x500 [ 39.030580] do_syscall_64+0x3f/0x90 [ 39.031060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.031708] RIP: 0033:0x7f8bd9aa8d82 [ 39.032205] 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 [ 39.034383] RSP: 002b:00007ffd2623efd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.035326] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8bd9aa8d82 [ 39.036207] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8bd8ee2000 [ 39.037089] RBP: 00007f8bd8ee2000 R08: 0000000000000009 R09: 0000000000001000 [ 39.037944] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561211dc8ec0 [ 39.038789] R13: 00007ffd2623eff0 R14: 00007ffd2623f020 R15: 00007ffd2623f380 [ 39.039658] [ 39.039958] [ 39.040185] Allocated by task 212: [ 39.040619] kasan_save_stack+0x22/0x50 [ 39.041121] kasan_set_track+0x25/0x30 [ 39.041609] __kasan_slab_alloc+0x59/0x70 [ 39.042160] kmem_cache_alloc+0x16b/0x370 [ 39.042680] vm_area_dup+0x20/0x160 [ 39.043134] __split_vma+0x170/0x950 [ 39.043599] split_vma+0xc6/0x110 [ 39.044057] mprotect_fixup+0x8d2/0xb30 [ 39.044562] do_mprotect_pkey+0x87e/0xd40 [ 39.045088] __x64_sys_mprotect+0x78/0xc0 [ 39.045607] do_syscall_64+0x3f/0x90 [ 39.046091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.046732] [ 39.046946] Freed by task 212: [ 39.047344] kasan_save_stack+0x22/0x50 [ 39.047849] kasan_set_track+0x25/0x30 [ 39.048357] kasan_save_free_info+0x2b/0x50 [ 39.048888] __kasan_slab_free+0x10a/0x190 [ 39.049424] kmem_cache_free+0x10d/0x4d0 [ 39.049936] rcu_core+0x8c8/0x2860 [ 39.050387] __do_softirq+0x1b7/0x7d4 [ 39.050871] [ 39.051088] Last potentially related work creation: [ 39.051682] kasan_save_stack+0x22/0x50 [ 39.052197] __kasan_record_aux_stack+0x8e/0xa0 [ 39.052778] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.053426] remove_vma+0x139/0x170 [ 39.053876] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.054436] do_vmi_munmap+0x1f1/0x2b0 [ 39.054925] __vm_munmap+0x138/0x3a0 [ 39.055390] __x64_sys_munmap+0x59/0x80 [ 39.055885] do_syscall_64+0x3f/0x90 [ 39.056376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.057023] [ 39.057242] Second to last potentially related work creation: [ 39.057937] kasan_save_stack+0x22/0x50 [ 39.058446] __kasan_record_aux_stack+0x8e/0xa0 [ 39.059022] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.059674] remove_vma+0x139/0x170 [ 39.060154] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.060716] do_vmi_munmap+0x1f1/0x2b0 [ 39.061209] mmap_region+0x1f9/0x2660 [ 39.061688] do_mmap+0x854/0xf00 [ 39.062120] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.062607] ksys_mmap_pgoff+0x3af/0x500 [ 39.063112] do_syscall_64+0x3f/0x90 [ 39.063595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.064252] [ 39.064472] The buggy address belongs to the object at ffff88800e50d0e8 [ 39.064472] which belongs to the cache vm_area_struct of size 168 [ 39.065943] The buggy address is located 88 bytes inside of [ 39.065943] freed 168-byte region [ffff88800e50d0e8, ffff88800e50d190) [ 39.067353] [ 39.067568] The buggy address belongs to the physical page: [ 39.068236] page:00000000ae4eb70d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe50d [ 39.069330] memcg:ffff88800e499001 [ 39.069759] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.070406] page_type: 0xffffffff() [ 39.070860] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a6340 dead000000000006 [ 39.071787] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e499001 [ 39.072713] page dumped because: kasan: bad access detected [ 39.073372] [ 39.073591] Memory state around the buggy address: [ 39.074177] ffff88800e50d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.075030] ffff88800e50d080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 39.075893] >ffff88800e50d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.076749] ^ [ 39.077398] ffff88800e50d180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 39.078265] ffff88800e50d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.079127] ================================================================== [ 39.080125] Disabling lock debugging due to kernel taint [ 41.116587] BUG: Bad rss-counter state mm:00000000de31087c type:MM_FILEPAGES val:33 [ 41.117181] BUG: Bad rss-counter state mm:00000000de31087c type:MM_ANONPAGES val:22 [ 41.595366] BUG: Bad rss-counter state mm:0000000028c2e827 type:MM_FILEPAGES val:33 [ 41.596443] BUG: Bad rss-counter state mm:0000000028c2e827 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37849' (ECDSA) to the list of known hosts. 2023/06/20 16:00:35 fuzzer started 2023/06/20 16:00:35 dialing manager at localhost:36067 2023/06/20 16:00:35 checking machine... 2023/06/20 16:00:35 checking revisions... [ 42.359922] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:00:35 testing simple program... [ 42.415273] cgroup: Unknown subsys name 'net' [ 42.469737] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:00:35 Registers: info registers vcpu 0 RAX=ffff888008d9fd18 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008d9fc01 RSI=ffff888008d9fcc0 RDI=ffff888008d9fcc0 RBP=ffff888008d9f988 RSP=ffff888008d9f8c0 R8 =0000000000000001 R9 =ffff888008d9f970 R10=0000000000038001 R11=000000000000fc0c R12=ffff888008d9f990 R13=ffff888008d9f978 R14=ffff888008d9fcc0 R15=ffff888008d9f930 RIP=ffffffff81131236 RFL=00000202 [-------] 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=00007fa038c7c830 CR3=0000000015dae000 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=2034333a30303a3631203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a30303a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf40d20 RCX=0000000000000000 RDX=0000000080070007 RSI=ffffffff81806deb RDI=0000000000000000 RBP=ffff88800e5bfcf0 RSP=ffff88800e5bfc30 R8 =0000000000070007 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff8880087b83c0 R13=0000000000000000 R14=ffffea0000622200 R15=ffff88806cf40d00 RIP=ffffffff81806eae 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 00007f064702c900 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=00007ffcea715000 CR3=000000000daa4000 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=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