syzkaller login: [ 41.936516] BUG: Bad rss-counter state mm:00000000df64579f type:MM_FILEPAGES val:33 [ 41.937066] BUG: Bad rss-counter state mm:00000000df64579f type:MM_ANONPAGES val:22 [ 42.046737] ================================================================== [ 42.047834] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.048945] Read of size 8 at addr ffff88800de8a310 by task sshd/226 [ 42.049900] [ 42.050019] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.050484] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.051001] Call Trace: [ 42.051172] [ 42.051326] dump_stack_lvl+0x91/0xf0 [ 42.051592] print_report+0xcc/0x620 [ 42.051855] ? __virt_addr_valid+0x102/0x340 [ 42.052154] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.052482] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.052813] kasan_report+0xbe/0xf0 [ 42.053070] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.053399] vma_interval_tree_remove+0xc75/0xec0 [ 42.053721] vma_prepare+0xc54/0x11a0 [ 42.053981] __split_vma+0x5af/0x950 [ 42.054233] ? __pfx___split_vma+0x10/0x10 [ 42.054519] ? find_held_lock+0x2c/0x110 [ 42.054797] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.055103] ? lock_is_held_type+0x9f/0x120 [ 42.055394] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.055719] ? mtree_range_walk+0x632/0x900 [ 42.056020] ? mas_walk+0x5c7/0x7c0 [ 42.056278] do_vmi_munmap+0x1f1/0x2b0 [ 42.056540] mmap_region+0x1f9/0x2660 [ 42.056798] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.057093] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.057502] ? __pfx_lock_acquire+0x10/0x10 [ 42.057805] ? __pfx_mmap_region+0x10/0x10 [ 42.058113] ? security_mmap_addr+0x7d/0xa0 [ 42.058429] ? get_unmapped_area+0x1f5/0x3f0 [ 42.058737] do_mmap+0x854/0xf00 [ 42.058988] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.059267] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.059588] ksys_mmap_pgoff+0x3af/0x500 [ 42.059872] do_syscall_64+0x3f/0x90 [ 42.060145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.060510] RIP: 0033:0x7f4064f01d82 [ 42.060777] 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 [ 42.061998] RSP: 002b:00007ffc7ed86ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.062521] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4064f01d82 [ 42.063005] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f406433b000 [ 42.063489] RBP: 00007f406433b000 R08: 0000000000000009 R09: 0000000000001000 [ 42.063982] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce027abf70 [ 42.064469] R13: 00007ffc7ed86ae0 R14: 00007ffc7ed86b10 R15: 00007ffc7ed86e70 [ 42.064955] [ 42.065121] [ 42.065242] Allocated by task 219: [ 42.065486] kasan_save_stack+0x22/0x50 [ 42.065770] kasan_set_track+0x25/0x30 [ 42.066053] __kasan_slab_alloc+0x59/0x70 [ 42.066357] kmem_cache_alloc+0x16b/0x370 [ 42.066654] vm_area_dup+0x20/0x160 [ 42.066916] __split_vma+0x170/0x950 [ 42.067179] split_vma+0xc6/0x110 [ 42.067427] mprotect_fixup+0x8d2/0xb30 [ 42.067716] do_mprotect_pkey+0x87e/0xd40 [ 42.068021] __x64_sys_mprotect+0x78/0xc0 [ 42.068322] do_syscall_64+0x3f/0x90 [ 42.068592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.068957] [ 42.069078] Freed by task 13: [ 42.069303] kasan_save_stack+0x22/0x50 [ 42.069594] kasan_set_track+0x25/0x30 [ 42.069873] kasan_save_free_info+0x2b/0x50 [ 42.070177] __kasan_slab_free+0x10a/0x190 [ 42.070504] kmem_cache_free+0x10d/0x4d0 [ 42.070788] rcu_core+0x8c8/0x2860 [ 42.071044] __do_softirq+0x1b7/0x7d4 [ 42.071315] [ 42.071438] Last potentially related work creation: [ 42.071768] kasan_save_stack+0x22/0x50 [ 42.072058] __kasan_record_aux_stack+0x8e/0xa0 [ 42.072385] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.072750] remove_vma+0x139/0x170 [ 42.073013] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.073331] do_vmi_munmap+0x1f1/0x2b0 [ 42.073604] __vm_munmap+0x138/0x3a0 [ 42.073869] __x64_sys_munmap+0x59/0x80 [ 42.074153] do_syscall_64+0x3f/0x90 [ 42.074426] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.074787] [ 42.074909] Second to last potentially related work creation: [ 42.075303] kasan_save_stack+0x22/0x50 [ 42.075587] __kasan_record_aux_stack+0x8e/0xa0 [ 42.075917] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.076289] remove_vma+0x139/0x170 [ 42.076547] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.076857] do_vmi_munmap+0x1f1/0x2b0 [ 42.077137] mmap_region+0x1f9/0x2660 [ 42.077411] do_mmap+0x854/0xf00 [ 42.077659] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.077940] ksys_mmap_pgoff+0x3af/0x500 [ 42.078228] do_syscall_64+0x3f/0x90 [ 42.078514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.078877] [ 42.078998] The buggy address belongs to the object at ffff88800de8a2b8 [ 42.078998] which belongs to the cache vm_area_struct of size 168 [ 42.079831] The buggy address is located 88 bytes inside of [ 42.079831] freed 168-byte region [ffff88800de8a2b8, ffff88800de8a360) [ 42.080641] [ 42.080762] The buggy address belongs to the physical page: [ 42.081148] page:000000001bab46ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde8a [ 42.081783] memcg:ffff88800df4ef01 [ 42.082029] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.082431] page_type: 0xffffffff() [ 42.082684] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 42.083216] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df4ef01 [ 42.083729] page dumped because: kasan: bad access detected [ 42.084106] [ 42.084230] Memory state around the buggy address: [ 42.084563] ffff88800de8a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 42.085047] ffff88800de8a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 42.085538] >ffff88800de8a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 42.086026] ^ [ 42.086303] ffff88800de8a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 42.086792] ffff88800de8a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 42.087285] ================================================================== [ 42.087884] Disabling lock debugging due to kernel taint [ 44.047771] BUG: Bad rss-counter state mm:0000000046a59202 type:MM_FILEPAGES val:33 [ 44.048655] BUG: Bad rss-counter state mm:0000000046a59202 type:MM_ANONPAGES val:22 [ 44.543227] BUG: Bad rss-counter state mm:00000000774698dd type:MM_FILEPAGES val:33 [ 44.544427] BUG: Bad rss-counter state mm:00000000774698dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38867' (ECDSA) to the list of known hosts. 2023/06/19 22:16:32 fuzzer started 2023/06/19 22:16:32 dialing manager at localhost:44161 2023/06/19 22:16:32 checking machine... 2023/06/19 22:16:32 checking revisions... [ 45.190473] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:16:33 testing simple program... [ 45.245417] cgroup: Unknown subsys name 'net' [ 45.301451] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:16:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888016513680 RSI=ffffffff813c0090 RDI=0000000000000005 RBP=ffff88806ce2ba08 RSP=ffff88806ce09e48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=ffff88806ce2c250 R13=ffff88806ce2b940 R14=ffff88806ce2b9c0 R15=dffffc0000000000 RIP=ffffffff813c009e RFL=00000012 [----A--] 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 00007fac18147900 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=00007fac186fc650 CR3=000000000c9ac000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000101 RBX=0000000000000000 RCX=0000000080000101 RDX=ffff88800dc3d1c0 RSI=ffffffff814c84fa RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806cf099f8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff8880167b2800 RIP=ffffffff814c07f1 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 00007f247fa2a700 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=00007f072f0db000 CR3=000000000c598000 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=2032333a36313a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a36313a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000