syzkaller login: [ 31.204359] BUG: Bad rss-counter state mm:0000000071c9c650 type:MM_FILEPAGES val:33 [ 31.206095] BUG: Bad rss-counter state mm:0000000071c9c650 type:MM_ANONPAGES val:22 [ 31.366706] ================================================================== [ 31.367606] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.368542] Read of size 8 at addr ffff8880146ad058 by task sshd/221 [ 31.369316] [ 31.369534] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.370524] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.371497] Call Trace: [ 31.371816] <TASK> [ 31.372119] dump_stack_lvl+0x91/0xf0 [ 31.372615] print_report+0xcc/0x620 [ 31.373116] ? __virt_addr_valid+0x102/0x340 [ 31.373677] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.374297] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.374910] kasan_report+0xbe/0xf0 [ 31.375386] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.376017] vma_interval_tree_remove+0xc75/0xec0 [ 31.376643] vma_prepare+0xc54/0x11a0 [ 31.377146] __split_vma+0x5af/0x950 [ 31.377637] ? __pfx___split_vma+0x10/0x10 [ 31.378187] ? find_held_lock+0x2c/0x110 [ 31.378727] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.379320] ? lock_is_held_type+0x9f/0x120 [ 31.379880] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.380506] ? mtree_range_walk+0x632/0x900 [ 31.381086] ? mas_walk+0x5c7/0x7c0 [ 31.381619] do_vmi_munmap+0x1f1/0x2b0 [ 31.382133] mmap_region+0x1f9/0x2660 [ 31.382643] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.383174] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.383924] ? __pfx_lock_acquire+0x10/0x10 [ 31.384482] ? __pfx_mmap_region+0x10/0x10 [ 31.385038] ? security_mmap_addr+0x7d/0xa0 [ 31.385606] ? get_unmapped_area+0x1f5/0x3f0 [ 31.386178] do_mmap+0x854/0xf00 [ 31.386645] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.387163] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.387752] ksys_mmap_pgoff+0x3af/0x500 [ 31.388276] do_syscall_64+0x3f/0x90 [ 31.388771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.389447] RIP: 0033:0x7f357b90ed82 [ 31.389921] 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 [ 31.392140] RSP: 002b:00007ffd23638ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.393088] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f357b90ed82 [ 31.393995] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f357ad48000 [ 31.394878] RBP: 00007f357ad48000 R08: 0000000000000009 R09: 0000000000001000 [ 31.395762] R10: 0000000000000812 R11: 0000000000000206 R12: 00005639e3988d90 [ 31.396652] R13: 00007ffd23638b00 R14: 00007ffd23638b30 R15: 00007ffd23638e90 [ 31.397547] </TASK> [ 31.397846] [ 31.398070] Allocated by task 214: [ 31.398514] kasan_save_stack+0x22/0x50 [ 31.399041] kasan_set_track+0x25/0x30 [ 31.399560] __kasan_slab_alloc+0x59/0x70 [ 31.400104] kmem_cache_alloc+0x16b/0x370 [ 31.400652] vm_area_dup+0x20/0x160 [ 31.401127] __split_vma+0x170/0x950 [ 31.401610] split_vma+0xc6/0x110 [ 31.402067] mprotect_fixup+0x8d2/0xb30 [ 31.402586] do_mprotect_pkey+0x87e/0xd40 [ 31.403128] __x64_sys_mprotect+0x78/0xc0 [ 31.403668] do_syscall_64+0x3f/0x90 [ 31.404158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.404824] [ 31.405047] Freed by task 214: [ 31.405474] kasan_save_stack+0x22/0x50 [ 31.405994] kasan_set_track+0x25/0x30 [ 31.406503] kasan_save_free_info+0x2b/0x50 [ 31.407058] __kasan_slab_free+0x10a/0x190 [ 31.407611] kmem_cache_free+0x10d/0x4d0 [ 31.408138] rcu_core+0x8c8/0x2860 [ 31.408599] __do_softirq+0x1b7/0x7d4 [ 31.409110] [ 31.409332] Last potentially related work creation: [ 31.409939] kasan_save_stack+0x22/0x50 [ 31.410461] __kasan_record_aux_stack+0x8e/0xa0 [ 31.411133] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.411800] remove_vma+0x139/0x170 [ 31.412267] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.412852] do_vmi_munmap+0x1f1/0x2b0 [ 31.413383] __vm_munmap+0x138/0x3a0 [ 31.413867] __x64_sys_munmap+0x59/0x80 [ 31.414386] do_syscall_64+0x3f/0x90 [ 31.414882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.415552] [ 31.415772] The buggy address belongs to the object at ffff8880146ad000 [ 31.415772] which belongs to the cache vm_area_struct of size 168 [ 31.417303] The buggy address is located 88 bytes inside of [ 31.417303] freed 168-byte region [ffff8880146ad000, ffff8880146ad0a8) [ 31.418779] [ 31.419001] The buggy address belongs to the physical page: [ 31.419691] page:0000000083cc3461 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146ad [ 31.420823] memcg:ffff88801471f901 [ 31.421289] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.421958] page_type: 0xffffffff() [ 31.422430] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.423384] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801471f901 [ 31.424326] page dumped because: kasan: bad access detected [ 31.425016] [ 31.425246] Memory state around the buggy address: [ 31.425854] ffff8880146acf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.426737] ffff8880146acf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.427625] >ffff8880146ad000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.428502] ^ [ 31.429270] ffff8880146ad080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.430162] ffff8880146ad100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.431044] ================================================================== [ 31.432000] Disabling lock debugging due to kernel taint [ 34.139220] BUG: Bad rss-counter state mm:00000000d687b4ef type:MM_FILEPAGES val:33 [ 34.140111] BUG: Bad rss-counter state mm:00000000d687b4ef type:MM_ANONPAGES val:22 [ 34.697672] BUG: Bad rss-counter state mm:00000000efa9f8fb type:MM_FILEPAGES val:33 [ 34.698856] BUG: Bad rss-counter state mm:00000000efa9f8fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41749' (ECDSA) to the list of known hosts. 2023/06/20 10:54:11 fuzzer started 2023/06/20 10:54:12 dialing manager at localhost:36067 2023/06/20 10:54:12 checking machine... 2023/06/20 10:54:12 checking revisions... [ 35.384437] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:54:12 testing simple program... [ 35.444579] cgroup: Unknown subsys name 'net' [ 35.510155] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:54:11 Registers: info registers vcpu 0 RAX=ffff888018f99b40 RBX=ffffffff813ad470 RCX=ffff8880159dfa40 RDX=0000000000000000 RSI=ffff888018f99b40 RDI=ffff8880159df9a8 RBP=ffff8880159dfa40 RSP=ffff8880159df9a0 R8 =ffff8880195c9140 R9 =0000000000000000 R10=ffffed10032b9228 R11=0000000000000001 R12=ffff8880159dfa70 R13=0000000000000000 R14=ffff888018f99b40 R15=0000000000000cc0 RIP=ffffffff81132a74 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 00007fb83a8e4900 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=00007ffcca6f5000 CR3=000000001cd58000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c09f79 RBX=ffffffff8604fbcc RCX=ffffffff845137d6 RDX=0000000000000000 RSI=ffffffff864b3802 RDI=ffffffff8604fbc0 RBP=ffffffff8604fbcc RSP=ffff88806cf099e0 R8 =ffffffff864b3802 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b547f R12=ffffffff8604fbd0 R13=ffffffff8604fbc0 R14=ffffffff8604fbc8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 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=00007f8cd6695450 CR3=000000000cfee000 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=2031313a34353a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a34353a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000