syzkaller login: [ 30.215385] BUG: Bad rss-counter state mm:00000000b0f33289 type:MM_FILEPAGES val:33 [ 30.216623] BUG: Bad rss-counter state mm:00000000b0f33289 type:MM_ANONPAGES val:22 [ 30.254076] ================================================================== [ 30.255051] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.255997] Read of size 8 at addr ffff88800ffd3a50 by task sshd/220 [ 30.256802] [ 30.257025] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.257900] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.258907] Call Trace: [ 30.259233] <TASK> [ 30.259525] dump_stack_lvl+0x91/0xf0 [ 30.260021] print_report+0xcc/0x620 [ 30.260526] ? __virt_addr_valid+0x102/0x340 [ 30.261087] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.261717] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.262346] kasan_report+0xbe/0xf0 [ 30.262836] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.263468] vma_interval_tree_remove+0xc75/0xec0 [ 30.264086] vma_prepare+0xc54/0x11a0 [ 30.264590] __split_vma+0x5af/0x950 [ 30.265070] ? __pfx___split_vma+0x10/0x10 [ 30.265609] ? find_held_lock+0x2c/0x110 [ 30.266142] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.266722] ? lock_is_held_type+0x9f/0x120 [ 30.267281] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.267896] ? mtree_range_walk+0x632/0x900 [ 30.268482] ? mas_walk+0x5c7/0x7c0 [ 30.268966] do_vmi_munmap+0x1f1/0x2b0 [ 30.269469] mmap_region+0x1f9/0x2660 [ 30.269963] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.270487] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.271227] ? __pfx_lock_acquire+0x10/0x10 [ 30.271778] ? __pfx_mmap_region+0x10/0x10 [ 30.272335] ? security_mmap_addr+0x7d/0xa0 [ 30.272879] ? get_unmapped_area+0x1f5/0x3f0 [ 30.273439] do_mmap+0x854/0xf00 [ 30.273891] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.274399] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.274969] ksys_mmap_pgoff+0x3af/0x500 [ 30.275500] do_syscall_64+0x3f/0x90 [ 30.275988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.276662] RIP: 0033:0x7fe844f3bd82 [ 30.277139] 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 [ 30.279374] RSP: 002b:00007ffc97476cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.280343] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe844f3bd82 [ 30.281216] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe844375000 [ 30.282197] RBP: 00007fe844375000 R08: 0000000000000009 R09: 0000000000001000 [ 30.283065] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562247c27ec0 [ 30.283951] R13: 00007ffc97476d10 R14: 00007ffc97476d40 R15: 00007ffc974770a0 [ 30.284842] </TASK> [ 30.285140] [ 30.285357] Allocated by task 213: [ 30.285796] kasan_save_stack+0x22/0x50 [ 30.286315] kasan_set_track+0x25/0x30 [ 30.286827] __kasan_slab_alloc+0x59/0x70 [ 30.287375] kmem_cache_alloc+0x16b/0x370 [ 30.287916] vm_area_dup+0x20/0x160 [ 30.288405] __split_vma+0x170/0x950 [ 30.288884] split_vma+0xc6/0x110 [ 30.289341] mprotect_fixup+0x8d2/0xb30 [ 30.289859] do_mprotect_pkey+0x87e/0xd40 [ 30.290390] __x64_sys_mprotect+0x78/0xc0 [ 30.290922] do_syscall_64+0x3f/0x90 [ 30.291407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.292073] [ 30.292311] Freed by task 213: [ 30.292715] kasan_save_stack+0x22/0x50 [ 30.293231] kasan_set_track+0x25/0x30 [ 30.293732] kasan_save_free_info+0x2b/0x50 [ 30.294349] __kasan_slab_free+0x10a/0x190 [ 30.294901] kmem_cache_free+0x10d/0x4d0 [ 30.295425] rcu_core+0x8c8/0x2860 [ 30.295872] __do_softirq+0x1b7/0x7d4 [ 30.296380] [ 30.296602] Last potentially related work creation: [ 30.297203] kasan_save_stack+0x22/0x50 [ 30.297720] __kasan_record_aux_stack+0x8e/0xa0 [ 30.298303] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.298959] remove_vma+0x139/0x170 [ 30.299418] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.299991] do_vmi_munmap+0x1f1/0x2b0 [ 30.300520] __vm_munmap+0x138/0x3a0 [ 30.301003] __x64_sys_munmap+0x59/0x80 [ 30.301513] do_syscall_64+0x3f/0x90 [ 30.302004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.302667] [ 30.302891] Second to last potentially related work creation: [ 30.303589] kasan_save_stack+0x22/0x50 [ 30.304102] __kasan_record_aux_stack+0x8e/0xa0 [ 30.304709] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.305382] remove_vma+0x139/0x170 [ 30.305844] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.306417] do_vmi_munmap+0x1f1/0x2b0 [ 30.306920] mmap_region+0x1f9/0x2660 [ 30.307416] do_mmap+0x854/0xf00 [ 30.307863] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.308386] ksys_mmap_pgoff+0x3af/0x500 [ 30.308904] do_syscall_64+0x3f/0x90 [ 30.309389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.310052] [ 30.310276] The buggy address belongs to the object at ffff88800ffd39f8 [ 30.310276] which belongs to the cache vm_area_struct of size 168 [ 30.311803] The buggy address is located 88 bytes inside of [ 30.311803] freed 168-byte region [ffff88800ffd39f8, ffff88800ffd3aa0) [ 30.313275] [ 30.313497] The buggy address belongs to the physical page: [ 30.314177] page:00000000bd84139a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xffd3 [ 30.315306] memcg:ffff88800ffdc701 [ 30.315743] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.316471] page_type: 0xffffffff() [ 30.316931] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 30.317872] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ffdc701 [ 30.318800] page dumped because: kasan: bad access detected [ 30.319484] [ 30.319698] Memory state around the buggy address: [ 30.320306] ffff88800ffd3900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.321178] ffff88800ffd3980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.322060] >ffff88800ffd3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.322949] ^ [ 30.323671] ffff88800ffd3a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 30.324556] ffff88800ffd3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.325426] ================================================================== [ 30.326625] Disabling lock debugging due to kernel taint [ 32.081364] BUG: Bad rss-counter state mm:00000000745af737 type:MM_FILEPAGES val:33 [ 32.082518] BUG: Bad rss-counter state mm:00000000745af737 type:MM_ANONPAGES val:22 [ 32.472707] BUG: Bad rss-counter state mm:00000000fbbb35ac type:MM_FILEPAGES val:33 [ 32.473907] BUG: Bad rss-counter state mm:00000000fbbb35ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1095' (ECDSA) to the list of known hosts. 2023/06/21 03:35:03 fuzzer started 2023/06/21 03:35:03 dialing manager at localhost:36067 2023/06/21 03:35:03 checking machine... 2023/06/21 03:35:03 checking revisions... [ 33.082054] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:35:03 testing simple program... [ 33.124903] cgroup: Unknown subsys name 'net' [ 33.163385] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:35:03 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00007ff19602a000 RCX=0000000080000000 RDX=ffff88800dbab680 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff88800ef87a30 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007ff19602a000 R11=00000000000b6a61 R12=ffff88800ef87b78 R13=0000000000000000 R14=ffff88800dbab680 R15=ffff88801cc9abe0 RIP=ffffffff814c0871 RFL=00000207 [-----PC] 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 00007ff195b37900 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=00007ff1960ef0b0 CR3=000000000eb82000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000208040 RBX=1ffff110011b4f8f RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888008d92fb8 RBP=00000000fffbe93e RSP=ffff888008da7c70 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000001 R13=1ffffffff0a81e40 R14=ffff888008da7c98 R15=ffff888008da7dc0 RIP=ffffffff84534425 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 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=00007f97da3256a0 CR3=0000000016b16000 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=2033303a35333a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a35333a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000