syzkaller login: [ 38.849207] BUG: Bad rss-counter state mm:000000003605fa79 type:MM_FILEPAGES val:33 [ 38.849946] BUG: Bad rss-counter state mm:000000003605fa79 type:MM_ANONPAGES val:22 [ 38.974011] ================================================================== [ 38.974629] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.975275] Read of size 8 at addr ffff88800e5f9310 by task sshd/219 [ 38.975774] [ 38.975915] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.976481] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.977103] Call Trace: [ 38.977311] [ 38.977508] dump_stack_lvl+0x91/0xf0 [ 38.977837] print_report+0xcc/0x620 [ 38.978160] ? __virt_addr_valid+0x102/0x340 [ 38.978641] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.979059] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.979487] kasan_report+0xbe/0xf0 [ 38.979797] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.980182] vma_interval_tree_remove+0xc75/0xec0 [ 38.980578] vma_prepare+0xc54/0x11a0 [ 38.980889] __split_vma+0x5af/0x950 [ 38.981229] ? __pfx___split_vma+0x10/0x10 [ 38.981615] ? find_held_lock+0x2c/0x110 [ 38.981989] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.982397] ? lock_is_held_type+0x9f/0x120 [ 38.982778] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.983261] ? mtree_range_walk+0x632/0x900 [ 38.983672] ? mas_walk+0x5c7/0x7c0 [ 38.983997] do_vmi_munmap+0x1f1/0x2b0 [ 38.984355] mmap_region+0x1f9/0x2660 [ 38.984690] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.985022] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.985479] ? __pfx_lock_acquire+0x10/0x10 [ 38.985839] ? __pfx_mmap_region+0x10/0x10 [ 38.986205] ? security_mmap_addr+0x7d/0xa0 [ 38.986578] ? get_unmapped_area+0x1f5/0x3f0 [ 38.987009] do_mmap+0x854/0xf00 [ 38.987323] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.987675] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.988053] ksys_mmap_pgoff+0x3af/0x500 [ 38.988395] do_syscall_64+0x3f/0x90 [ 38.988727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.989145] RIP: 0033:0x7fcbb2c3bd82 [ 38.989434] 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 [ 38.990905] RSP: 002b:00007ffcca08a488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.991522] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcbb2c3bd82 [ 38.992091] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcbb2075000 [ 38.992665] RBP: 00007fcbb2075000 R08: 0000000000000009 R09: 0000000000001000 [ 38.993239] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579c0542ec0 [ 38.993812] R13: 00007ffcca08a4a0 R14: 00007ffcca08a4d0 R15: 00007ffcca08a830 [ 38.994390] [ 38.994591] [ 38.994733] Allocated by task 212: [ 38.995068] kasan_save_stack+0x22/0x50 [ 38.995426] kasan_set_track+0x25/0x30 [ 38.995758] __kasan_slab_alloc+0x59/0x70 [ 38.996113] kmem_cache_alloc+0x16b/0x370 [ 38.996456] vm_area_dup+0x20/0x160 [ 38.996768] __split_vma+0x170/0x950 [ 38.997093] split_vma+0xc6/0x110 [ 38.997395] mprotect_fixup+0x8d2/0xb30 [ 38.997734] do_mprotect_pkey+0x87e/0xd40 [ 38.998095] __x64_sys_mprotect+0x78/0xc0 [ 38.998477] do_syscall_64+0x3f/0x90 [ 38.998792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.999240] [ 38.999382] Freed by task 212: [ 38.999639] kasan_save_stack+0x22/0x50 [ 38.999994] kasan_set_track+0x25/0x30 [ 39.000332] kasan_save_free_info+0x2b/0x50 [ 39.000704] __kasan_slab_free+0x10a/0x190 [ 39.001073] kmem_cache_free+0x10d/0x4d0 [ 39.001415] rcu_core+0x8c8/0x2860 [ 39.001696] __do_softirq+0x1b7/0x7d4 [ 39.002000] [ 39.002140] Last potentially related work creation: [ 39.002510] kasan_save_stack+0x22/0x50 [ 39.002871] __kasan_record_aux_stack+0x8e/0xa0 [ 39.003239] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.003648] remove_vma+0x139/0x170 [ 39.003935] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.004278] do_vmi_munmap+0x1f1/0x2b0 [ 39.004594] __vm_munmap+0x138/0x3a0 [ 39.004915] __x64_sys_munmap+0x59/0x80 [ 39.005242] do_syscall_64+0x3f/0x90 [ 39.005564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.005995] [ 39.006131] Second to last potentially related work creation: [ 39.006571] kasan_save_stack+0x22/0x50 [ 39.006939] __kasan_record_aux_stack+0x8e/0xa0 [ 39.007299] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.007708] remove_vma+0x139/0x170 [ 39.007985] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.008330] do_vmi_munmap+0x1f1/0x2b0 [ 39.008657] mmap_region+0x1f9/0x2660 [ 39.008985] do_mmap+0x854/0xf00 [ 39.009280] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.009591] ksys_mmap_pgoff+0x3af/0x500 [ 39.009917] do_syscall_64+0x3f/0x90 [ 39.010229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.010643] [ 39.010781] The buggy address belongs to the object at ffff88800e5f92b8 [ 39.010781] which belongs to the cache vm_area_struct of size 168 [ 39.011769] The buggy address is located 88 bytes inside of [ 39.011769] freed 168-byte region [ffff88800e5f92b8, ffff88800e5f9360) [ 39.012715] [ 39.012858] The buggy address belongs to the physical page: [ 39.013306] page:000000005a1de9c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5f9 [ 39.014085] memcg:ffff88800e1de101 [ 39.014390] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.014867] page_type: 0xffffffff() [ 39.015162] raw: 0100000000000200 ffff8880087a0c80 ffffea0000360700 dead000000000004 [ 39.015833] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1de101 [ 39.016465] page dumped because: kasan: bad access detected [ 39.016906] [ 39.017043] Memory state around the buggy address: [ 39.017428] ffff88800e5f9200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.018013] ffff88800e5f9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.018605] >ffff88800e5f9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.019208] ^ [ 39.019525] ffff88800e5f9380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.020086] ffff88800e5f9400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.020659] ================================================================== [ 39.021380] Disabling lock debugging due to kernel taint [ 40.979958] BUG: Bad rss-counter state mm:00000000af57bcbf type:MM_FILEPAGES val:33 [ 40.980685] BUG: Bad rss-counter state mm:00000000af57bcbf type:MM_ANONPAGES val:22 [ 41.342163] BUG: Bad rss-counter state mm:0000000041f8d98e type:MM_FILEPAGES val:33 [ 41.342911] BUG: Bad rss-counter state mm:0000000041f8d98e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8783' (ECDSA) to the list of known hosts. 2023/06/21 08:42:43 fuzzer started 2023/06/21 08:42:43 dialing manager at localhost:36067 2023/06/21 08:42:43 checking machine... 2023/06/21 08:42:43 checking revisions... [ 41.942072] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:42:43 testing simple program... [ 41.978699] cgroup: Unknown subsys name 'net' [ 42.012220] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:42:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81810727 RSP=ffff88806ce09de0 R8 =0000000023c0916b R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000200 R13=ffffea0000689f80 R14=ffffffff813782f8 R15=ffff88801a27e5c0 RIP=ffffffff8180fea8 RFL=00000056 [---ZAP-] 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 00007f2fa5d9a900 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=00007ffc039fb000 CR3=000000000eac4000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f76763997e0 CR3=0000000015ed8000 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=2032343a32343a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a32343a3830203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000