syzkaller login: [ 31.568906] BUG: Bad rss-counter state mm:00000000f74e9748 type:MM_FILEPAGES val:33 [ 31.570695] BUG: Bad rss-counter state mm:00000000f74e9748 type:MM_ANONPAGES val:22 [ 31.734373] ================================================================== [ 31.735278] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.736230] Read of size 8 at addr ffff888015f28880 by task sshd/221 [ 31.737011] [ 31.737241] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.738241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.739226] Call Trace: [ 31.739545] [ 31.739829] dump_stack_lvl+0x91/0xf0 [ 31.740339] print_report+0xcc/0x620 [ 31.740842] ? __virt_addr_valid+0x102/0x340 [ 31.741399] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.742045] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.742665] kasan_report+0xbe/0xf0 [ 31.743153] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.743785] vma_interval_tree_remove+0xc75/0xec0 [ 31.744403] vma_prepare+0xc54/0x11a0 [ 31.744897] __split_vma+0x5af/0x950 [ 31.745372] ? __pfx___split_vma+0x10/0x10 [ 31.745922] ? find_held_lock+0x2c/0x110 [ 31.746447] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.747016] ? lock_is_held_type+0x9f/0x120 [ 31.747562] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.748172] ? mtree_range_walk+0x632/0x900 [ 31.748731] ? mas_walk+0x5c7/0x7c0 [ 31.749214] do_vmi_munmap+0x1f1/0x2b0 [ 31.749746] mmap_region+0x1f9/0x2660 [ 31.750233] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.750745] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.751467] ? __pfx_lock_acquire+0x10/0x10 [ 31.752005] ? __pfx_mmap_region+0x10/0x10 [ 31.752539] ? security_mmap_addr+0x7d/0xa0 [ 31.753070] ? get_unmapped_area+0x1f5/0x3f0 [ 31.753620] do_mmap+0x854/0xf00 [ 31.754072] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.754587] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.755159] ksys_mmap_pgoff+0x3af/0x500 [ 31.755677] do_syscall_64+0x3f/0x90 [ 31.756169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.756831] RIP: 0033:0x7f49a106fd82 [ 31.757298] 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 [ 31.759448] RSP: 002b:00007ffc0b857c38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.760375] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f49a106fd82 [ 31.761247] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f49a04a9000 [ 31.762141] RBP: 00007f49a04a9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.763004] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a348ca3f70 [ 31.763866] R13: 00007ffc0b857c50 R14: 00007ffc0b857c80 R15: 00007ffc0b857fe0 [ 31.764730] [ 31.765026] [ 31.765252] Allocated by task 214: [ 31.765698] kasan_save_stack+0x22/0x50 [ 31.766215] kasan_set_track+0x25/0x30 [ 31.766720] __kasan_slab_alloc+0x59/0x70 [ 31.767253] kmem_cache_alloc+0x16b/0x370 [ 31.767781] vm_area_dup+0x20/0x160 [ 31.768246] __split_vma+0x170/0x950 [ 31.768722] split_vma+0xc6/0x110 [ 31.769169] mprotect_fixup+0x8d2/0xb30 [ 31.769685] do_mprotect_pkey+0x87e/0xd40 [ 31.770216] __x64_sys_mprotect+0x78/0xc0 [ 31.770747] do_syscall_64+0x3f/0x90 [ 31.771217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.771864] [ 31.772079] Freed by task 214: [ 31.772482] kasan_save_stack+0x22/0x50 [ 31.772994] kasan_set_track+0x25/0x30 [ 31.773503] kasan_save_free_info+0x2b/0x50 [ 31.774046] __kasan_slab_free+0x10a/0x190 [ 31.774587] kmem_cache_free+0x10d/0x4d0 [ 31.775107] rcu_core+0x8c8/0x2860 [ 31.775560] __do_softirq+0x1b7/0x7d4 [ 31.776054] [ 31.776273] Last potentially related work creation: [ 31.776868] kasan_save_stack+0x22/0x50 [ 31.777385] __kasan_record_aux_stack+0x8e/0xa0 [ 31.777982] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.778627] remove_vma+0x139/0x170 [ 31.779083] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.779651] do_vmi_munmap+0x1f1/0x2b0 [ 31.780147] __vm_munmap+0x138/0x3a0 [ 31.780611] __x64_sys_munmap+0x59/0x80 [ 31.781126] do_syscall_64+0x3f/0x90 [ 31.781608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.782269] [ 31.782490] The buggy address belongs to the object at ffff888015f28828 [ 31.782490] which belongs to the cache vm_area_struct of size 168 [ 31.783960] The buggy address is located 88 bytes inside of [ 31.783960] freed 168-byte region [ffff888015f28828, ffff888015f288d0) [ 31.785410] [ 31.785643] The buggy address belongs to the physical page: [ 31.786312] page:00000000fa5f25a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15f28 [ 31.787410] memcg:ffff88800fccaf01 [ 31.787839] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.788489] page_type: 0xffffffff() [ 31.788952] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.789885] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fccaf01 [ 31.790797] page dumped because: kasan: bad access detected [ 31.791466] [ 31.791680] Memory state around the buggy address: [ 31.792265] ffff888015f28780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.793132] ffff888015f28800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.794018] >ffff888015f28880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.794873] ^ [ 31.795288] ffff888015f28900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.796149] ffff888015f28980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.796998] ================================================================== [ 31.798065] Disabling lock debugging due to kernel taint [ 34.190751] BUG: Bad rss-counter state mm:00000000d5454f54 type:MM_FILEPAGES val:33 [ 34.191753] BUG: Bad rss-counter state mm:00000000d5454f54 type:MM_ANONPAGES val:22 [ 34.667397] BUG: Bad rss-counter state mm:0000000035609d8a type:MM_FILEPAGES val:33 [ 34.668222] BUG: Bad rss-counter state mm:0000000035609d8a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29061' (ECDSA) to the list of known hosts. 2023/06/19 16:50:32 fuzzer started 2023/06/19 16:50:33 dialing manager at localhost:44161 2023/06/19 16:50:33 checking machine... 2023/06/19 16:50:33 checking revisions... [ 35.371783] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:50:33 testing simple program... [ 35.422289] cgroup: Unknown subsys name 'net' [ 35.491498] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:50:31 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f655d549000 CR3=0000000015c58000 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=2032333a30353a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a30353a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180a769 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019c67301 RSI=ffff888019c673d0 RDI=ffff888019c673d0 RBP=ffff888019c670a8 RSP=ffff888019c66fe0 R8 =ffffffff8613773a R9 =ffff888019c67090 R10=0000000000038001 R11=0000000000020de7 R12=ffff888019c670b0 R13=ffff888019c67098 R14=ffff888019c673d8 R15=ffff888019c67050 RIP=ffffffff81131041 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 00007f1ed5636900 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=000055906c01cb88 CR3=000000000f290000 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