syzkaller login: [ 60.949018] BUG: Bad rss-counter state mm:00000000c0fc428d type:MM_FILEPAGES val:33 [ 60.950317] BUG: Bad rss-counter state mm:00000000c0fc428d type:MM_ANONPAGES val:22 [ 60.989346] ================================================================== [ 60.990351] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.991292] Read of size 8 at addr ffff88800977fdf0 by task sshd/220 [ 60.992070] [ 60.992305] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.993175] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.994174] Call Trace: [ 60.994496] [ 60.994778] dump_stack_lvl+0x91/0xf0 [ 60.995279] print_report+0xcc/0x620 [ 60.995772] ? __virt_addr_valid+0x102/0x340 [ 60.996346] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.996959] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.997573] kasan_report+0xbe/0xf0 [ 60.998045] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.998671] vma_interval_tree_remove+0xc75/0xec0 [ 60.999273] vma_prepare+0xc54/0x11a0 [ 60.999753] __split_vma+0x5af/0x950 [ 61.000225] ? __pfx___split_vma+0x10/0x10 [ 61.000772] ? find_held_lock+0x2c/0x110 [ 61.001295] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.001863] ? lock_is_held_type+0x9f/0x120 [ 61.002402] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.003007] ? mtree_range_walk+0x632/0x900 [ 61.003559] ? mas_walk+0x5c7/0x7c0 [ 61.004027] do_vmi_munmap+0x1f1/0x2b0 [ 61.004530] mmap_region+0x1f9/0x2660 [ 61.005008] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.005517] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.006230] ? __pfx_lock_acquire+0x10/0x10 [ 61.006757] ? __pfx_mmap_region+0x10/0x10 [ 61.007287] ? security_mmap_addr+0x7d/0xa0 [ 61.007811] ? get_unmapped_area+0x1f5/0x3f0 [ 61.008369] do_mmap+0x854/0xf00 [ 61.008810] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.009301] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.009870] ksys_mmap_pgoff+0x3af/0x500 [ 61.010382] do_syscall_64+0x3f/0x90 [ 61.010856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.011498] RIP: 0033:0x7f5a18c45d82 [ 61.011956] 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 [ 61.014098] RSP: 002b:00007fff546e1038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.015010] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a18c45d82 [ 61.015862] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a1807f000 [ 61.016861] RBP: 00007f5a1807f000 R08: 0000000000000009 R09: 0000000000001000 [ 61.017700] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561eb38cff70 [ 61.018559] R13: 00007fff546e1050 R14: 00007fff546e1080 R15: 00007fff546e13e0 [ 61.019417] [ 61.019707] [ 61.019922] Allocated by task 213: [ 61.020373] kasan_save_stack+0x22/0x50 [ 61.020871] kasan_set_track+0x25/0x30 [ 61.021370] __kasan_slab_alloc+0x59/0x70 [ 61.021891] kmem_cache_alloc+0x16b/0x370 [ 61.022400] vm_area_dup+0x20/0x160 [ 61.022851] __split_vma+0x170/0x950 [ 61.023318] split_vma+0xc6/0x110 [ 61.023756] mprotect_fixup+0x8d2/0xb30 [ 61.024261] do_mprotect_pkey+0x87e/0xd40 [ 61.024788] __x64_sys_mprotect+0x78/0xc0 [ 61.025311] do_syscall_64+0x3f/0x90 [ 61.025785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.026429] [ 61.026643] Freed by task 213: [ 61.027038] kasan_save_stack+0x22/0x50 [ 61.027540] kasan_set_track+0x25/0x30 [ 61.028034] kasan_save_free_info+0x2b/0x50 [ 61.028573] __kasan_slab_free+0x10a/0x190 [ 61.029106] kmem_cache_free+0x10d/0x4d0 [ 61.029617] rcu_core+0x8c8/0x2860 [ 61.030063] __do_softirq+0x1b7/0x7d4 [ 61.030544] [ 61.030760] Last potentially related work creation: [ 61.031350] kasan_save_stack+0x22/0x50 [ 61.031852] __kasan_record_aux_stack+0x8e/0xa0 [ 61.032440] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.033086] remove_vma+0x139/0x170 [ 61.033538] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.034115] do_vmi_munmap+0x1f1/0x2b0 [ 61.034600] __vm_munmap+0x138/0x3a0 [ 61.035077] __x64_sys_munmap+0x59/0x80 [ 61.035577] do_syscall_64+0x3f/0x90 [ 61.036052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.036711] [ 61.036932] Second to last potentially related work creation: [ 61.037670] kasan_save_stack+0x22/0x50 [ 61.038188] __kasan_record_aux_stack+0x8e/0xa0 [ 61.038771] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.039413] remove_vma+0x139/0x170 [ 61.039866] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.040434] do_vmi_munmap+0x1f1/0x2b0 [ 61.040923] mmap_region+0x1f9/0x2660 [ 61.041405] do_mmap+0x854/0xf00 [ 61.041843] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.042345] ksys_mmap_pgoff+0x3af/0x500 [ 61.042854] do_syscall_64+0x3f/0x90 [ 61.043344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.043984] [ 61.044201] The buggy address belongs to the object at ffff88800977fd98 [ 61.044201] which belongs to the cache vm_area_struct of size 168 [ 61.045690] The buggy address is located 88 bytes inside of [ 61.045690] freed 168-byte region [ffff88800977fd98, ffff88800977fe40) [ 61.047087] [ 61.047310] The buggy address belongs to the physical page: [ 61.047967] page:000000004b2ed658 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x977f [ 61.049063] memcg:ffff88800cef1801 [ 61.049489] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.050138] page_type: 0xffffffff() [ 61.050597] raw: 0100000000000200 ffff8880087a0c80 ffffea0000395dc0 dead000000000008 [ 61.051514] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cef1801 [ 61.052443] page dumped because: kasan: bad access detected [ 61.053109] [ 61.053331] Memory state around the buggy address: [ 61.053910] ffff88800977fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 61.054771] ffff88800977fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 61.055629] >ffff88800977fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 61.056493] ^ [ 61.057304] ffff88800977fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 61.058173] ffff88800977fe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.059028] ================================================================== [ 61.060337] Disabling lock debugging due to kernel taint [ 63.012540] BUG: Bad rss-counter state mm:00000000795119ba type:MM_FILEPAGES val:33 [ 63.013704] BUG: Bad rss-counter state mm:00000000795119ba type:MM_ANONPAGES val:22 [ 63.403388] BUG: Bad rss-counter state mm:00000000a3718daa type:MM_FILEPAGES val:33 [ 63.404496] BUG: Bad rss-counter state mm:00000000a3718daa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11269' (ECDSA) to the list of known hosts. 2023/06/21 04:06:43 fuzzer started 2023/06/21 04:06:43 dialing manager at localhost:36067 2023/06/21 04:06:43 checking machine... 2023/06/21 04:06:43 checking revisions... [ 64.129788] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:06:43 testing simple program... [ 64.159935] cgroup: Unknown subsys name 'net' [ 64.193700] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:06:43 Registers: info registers vcpu 0 RAX=ffffffff85d3e490 RBX=0000000000000000 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff813710b9 RSP=ffff8880146bfc20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00000000000000a5 R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff812d133c RFL=00000002 [-------] 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 00007f380f6d5900 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=00007ffc4c314000 CR3=000000000f654000 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=6720646572637465733a4d41503d706f 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 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=0000000000000001 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=00007f33b8c9f8d0 CR3=000000000cebc000 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=2032343a36303a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a36303a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000