syzkaller login: [ 38.597412] BUG: Bad rss-counter state mm:00000000bc386ddd type:MM_FILEPAGES val:33 [ 38.598223] BUG: Bad rss-counter state mm:00000000bc386ddd type:MM_ANONPAGES val:22 [ 38.627243] ================================================================== [ 38.628060] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.628682] Read of size 8 at addr ffff8880198d0b38 by task sshd/218 [ 38.629250] [ 38.629400] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.629976] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.630626] Call Trace: [ 38.630857] [ 38.631056] dump_stack_lvl+0x91/0xf0 [ 38.631580] print_report+0xcc/0x620 [ 38.631965] ? __virt_addr_valid+0x102/0x340 [ 38.632338] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.632772] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.633198] kasan_report+0xbe/0xf0 [ 38.633528] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.633978] vma_interval_tree_remove+0xc75/0xec0 [ 38.634377] vma_prepare+0xc54/0x11a0 [ 38.634683] __split_vma+0x5af/0x950 [ 38.634989] ? __pfx___split_vma+0x10/0x10 [ 38.635379] ? find_held_lock+0x2c/0x110 [ 38.635765] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.636153] ? lock_is_held_type+0x9f/0x120 [ 38.636525] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.636926] ? mtree_range_walk+0x632/0x900 [ 38.637286] ? mas_walk+0x5c7/0x7c0 [ 38.637600] do_vmi_munmap+0x1f1/0x2b0 [ 38.637921] mmap_region+0x1f9/0x2660 [ 38.638243] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.638581] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.639084] ? __pfx_lock_acquire+0x10/0x10 [ 38.639425] ? __pfx_mmap_region+0x10/0x10 [ 38.639787] ? security_mmap_addr+0x7d/0xa0 [ 38.640194] ? get_unmapped_area+0x1f5/0x3f0 [ 38.640572] do_mmap+0x854/0xf00 [ 38.640878] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.641218] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.641598] ksys_mmap_pgoff+0x3af/0x500 [ 38.641943] do_syscall_64+0x3f/0x90 [ 38.642262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.642690] RIP: 0033:0x7f07f0a7dd82 [ 38.643023] 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 [ 38.644541] RSP: 002b:00007ffd4bb614b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.645151] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f07f0a7dd82 [ 38.645721] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f07efeb7000 [ 38.646294] RBP: 00007f07efeb7000 R08: 0000000000000009 R09: 0000000000001000 [ 38.646870] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561a0aa9d980 [ 38.647453] R13: 00007ffd4bb614d0 R14: 00007ffd4bb61500 R15: 00007ffd4bb61860 [ 38.648097] [ 38.648302] [ 38.648445] Allocated by task 211: [ 38.648730] kasan_save_stack+0x22/0x50 [ 38.649071] kasan_set_track+0x25/0x30 [ 38.649409] __kasan_slab_alloc+0x59/0x70 [ 38.649753] kmem_cache_alloc+0x16b/0x370 [ 38.650097] vm_area_dup+0x20/0x160 [ 38.650389] __split_vma+0x170/0x950 [ 38.650691] split_vma+0xc6/0x110 [ 38.650979] mprotect_fixup+0x8d2/0xb30 [ 38.651312] do_mprotect_pkey+0x87e/0xd40 [ 38.651706] __x64_sys_mprotect+0x78/0xc0 [ 38.652070] do_syscall_64+0x3f/0x90 [ 38.652405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.652839] [ 38.652982] Freed by task 202: [ 38.653247] kasan_save_stack+0x22/0x50 [ 38.653602] kasan_set_track+0x25/0x30 [ 38.653950] kasan_save_free_info+0x2b/0x50 [ 38.654321] __kasan_slab_free+0x10a/0x190 [ 38.654687] kmem_cache_free+0x10d/0x4d0 [ 38.655037] rcu_core+0x8c8/0x2860 [ 38.655345] __do_softirq+0x1b7/0x7d4 [ 38.655704] [ 38.655867] Last potentially related work creation: [ 38.656272] kasan_save_stack+0x22/0x50 [ 38.656618] __kasan_record_aux_stack+0x8e/0xa0 [ 38.657013] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.657459] remove_vma+0x139/0x170 [ 38.657786] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.658178] do_vmi_munmap+0x1f1/0x2b0 [ 38.658497] __vm_munmap+0x138/0x3a0 [ 38.658821] __x64_sys_munmap+0x59/0x80 [ 38.659208] do_syscall_64+0x3f/0x90 [ 38.659549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.660031] [ 38.660183] The buggy address belongs to the object at ffff8880198d0ae0 [ 38.660183] which belongs to the cache vm_area_struct of size 168 [ 38.661203] The buggy address is located 88 bytes inside of [ 38.661203] freed 168-byte region [ffff8880198d0ae0, ffff8880198d0b88) [ 38.662208] [ 38.662356] The buggy address belongs to the physical page: [ 38.662813] page:00000000457659a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x198d0 [ 38.663659] memcg:ffff88800e3e3f01 [ 38.663967] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.664412] page_type: 0xffffffff() [ 38.664724] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bf440 dead000000000004 [ 38.665382] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3e3f01 [ 38.666014] page dumped because: kasan: bad access detected [ 38.666473] [ 38.666619] Memory state around the buggy address: [ 38.667032] ffff8880198d0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.667619] ffff8880198d0a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.668242] >ffff8880198d0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.668830] ^ [ 38.669253] ffff8880198d0b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 38.669845] ffff8880198d0c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.670461] ================================================================== [ 38.671251] Disabling lock debugging due to kernel taint [ 40.622714] BUG: Bad rss-counter state mm:00000000088ab2ab type:MM_FILEPAGES val:33 [ 40.623428] BUG: Bad rss-counter state mm:00000000088ab2ab type:MM_ANONPAGES val:22 [ 41.018078] BUG: Bad rss-counter state mm:00000000e9095bc0 type:MM_FILEPAGES val:33 [ 41.018767] BUG: Bad rss-counter state mm:00000000e9095bc0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1546' (ECDSA) to the list of known hosts. 2023/06/21 08:30:27 fuzzer started 2023/06/21 08:30:27 dialing manager at localhost:36067 2023/06/21 08:30:27 checking machine... 2023/06/21 08:30:27 checking revisions... [ 41.581625] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:30:27 testing simple program... [ 41.632717] cgroup: Unknown subsys name 'net' [ 41.705426] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:30:27 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=00000000cc56ba1f RCX=ffff88806c75d0f8 RDX=0000000000000010 RSI=ffffffff8180effe RDI=000000003569b455 RBP=ffff88800ca478a0 RSP=ffff888015b57670 R8 =00000000af63de06 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff888015b576d8 R15=0000000000000010 RIP=ffffffff822704fc RFL=00000216 [----AP-] 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 00007ff11de71700 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=00007fceb4b16a00 CR3=000000000f582000 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=2036323a30333a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a30333a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888014588000 RSI=ffffffff814c8584 RDI=ffff8880145883f4 RBP=0000000000000000 RSP=ffff8880183c79c8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff88800de8f980 RIP=ffffffff814c089b RFL=00000246 [---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 00007f8c0bc68900 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=00007ffd2ef6c000 CR3=00000000180a8000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000