syzkaller login: [ 60.798204] BUG: Bad rss-counter state mm:00000000b2d52fc5 type:MM_FILEPAGES val:33 [ 60.799323] BUG: Bad rss-counter state mm:00000000b2d52fc5 type:MM_ANONPAGES val:22 [ 60.961151] ================================================================== [ 60.962274] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.963472] Read of size 8 at addr ffff888019edb4e0 by task sshd/220 [ 60.964547] [ 60.964780] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.965679] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.966721] Call Trace: [ 60.967068] [ 60.967369] dump_stack_lvl+0x91/0xf0 [ 60.967887] print_report+0xcc/0x620 [ 60.968408] ? __virt_addr_valid+0x102/0x340 [ 60.969003] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.969645] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.970292] kasan_report+0xbe/0xf0 [ 60.970790] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.971446] vma_interval_tree_remove+0xc75/0xec0 [ 60.972074] vma_prepare+0xc54/0x11a0 [ 60.972574] __split_vma+0x5af/0x950 [ 60.973066] ? __pfx___split_vma+0x10/0x10 [ 60.973615] ? find_held_lock+0x2c/0x110 [ 60.974172] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.974771] ? lock_is_held_type+0x9f/0x120 [ 60.975365] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.975998] ? mtree_range_walk+0x632/0x900 [ 60.976580] ? mas_walk+0x5c7/0x7c0 [ 60.977077] do_vmi_munmap+0x1f1/0x2b0 [ 60.977591] mmap_region+0x1f9/0x2660 [ 60.978096] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.978638] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.979403] ? __pfx_lock_acquire+0x10/0x10 [ 60.979961] ? __pfx_mmap_region+0x10/0x10 [ 60.980515] ? security_mmap_addr+0x7d/0xa0 [ 60.981074] ? get_unmapped_area+0x1f5/0x3f0 [ 60.981648] do_mmap+0x854/0xf00 [ 60.982114] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.982631] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.983248] ksys_mmap_pgoff+0x3af/0x500 [ 60.983790] do_syscall_64+0x3f/0x90 [ 60.984297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.984980] RIP: 0033:0x7f556d7bad82 [ 60.985465] 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 [ 60.987720] RSP: 002b:00007ffde7a8a448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.988670] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f556d7bad82 [ 60.989558] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f556cbf4000 [ 60.990455] RBP: 00007f556cbf4000 R08: 0000000000000009 R09: 0000000000001000 [ 60.991359] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a3ba914d90 [ 60.992265] R13: 00007ffde7a8a460 R14: 00007ffde7a8a490 R15: 00007ffde7a8a7f0 [ 60.993158] [ 60.993470] [ 60.993698] Allocated by task 213: [ 60.994144] kasan_save_stack+0x22/0x50 [ 60.994670] kasan_set_track+0x25/0x30 [ 60.995214] __kasan_slab_alloc+0x59/0x70 [ 60.995770] kmem_cache_alloc+0x16b/0x370 [ 60.996312] vm_area_dup+0x20/0x160 [ 60.996799] __split_vma+0x170/0x950 [ 60.997287] split_vma+0xc6/0x110 [ 60.997745] mprotect_fixup+0x8d2/0xb30 [ 60.998275] do_mprotect_pkey+0x87e/0xd40 [ 60.998825] __x64_sys_mprotect+0x78/0xc0 [ 60.999376] do_syscall_64+0x3f/0x90 [ 60.999874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.000549] [ 61.000779] Freed by task 213: [ 61.001191] kasan_save_stack+0x22/0x50 [ 61.001717] kasan_set_track+0x25/0x30 [ 61.002231] kasan_save_free_info+0x2b/0x50 [ 61.002790] __kasan_slab_free+0x10a/0x190 [ 61.003361] kmem_cache_free+0x10d/0x4d0 [ 61.003900] rcu_core+0x8c8/0x2860 [ 61.004363] __do_softirq+0x1b7/0x7d4 [ 61.004965] [ 61.005197] Last potentially related work creation: [ 61.005810] kasan_save_stack+0x22/0x50 [ 61.006341] __kasan_record_aux_stack+0x8e/0xa0 [ 61.006941] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.007626] remove_vma+0x139/0x170 [ 61.008105] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.008690] do_vmi_munmap+0x1f1/0x2b0 [ 61.009202] __vm_munmap+0x138/0x3a0 [ 61.009699] __x64_sys_munmap+0x59/0x80 [ 61.010225] do_syscall_64+0x3f/0x90 [ 61.010730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.011422] [ 61.011645] The buggy address belongs to the object at ffff888019edb488 [ 61.011645] which belongs to the cache vm_area_struct of size 168 [ 61.013197] The buggy address is located 88 bytes inside of [ 61.013197] freed 168-byte region [ffff888019edb488, ffff888019edb530) [ 61.014680] [ 61.014908] The buggy address belongs to the physical page: [ 61.015623] page:00000000a822730f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19edb [ 61.016767] memcg:ffff88800df51101 [ 61.017215] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.017883] page_type: 0xffffffff() [ 61.018353] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.019338] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df51101 [ 61.020289] page dumped because: kasan: bad access detected [ 61.020984] [ 61.021212] Memory state around the buggy address: [ 61.021845] ffff888019edb380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.022788] ffff888019edb400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 61.023740] >ffff888019edb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.024653] ^ [ 61.025474] ffff888019edb500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 61.026386] ffff888019edb580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.027318] ================================================================== [ 61.028302] Disabling lock debugging due to kernel taint [ 63.837159] BUG: Bad rss-counter state mm:00000000cffba59c type:MM_FILEPAGES val:33 [ 63.838271] BUG: Bad rss-counter state mm:00000000cffba59c type:MM_ANONPAGES val:22 [ 64.314211] BUG: Bad rss-counter state mm:00000000d7571e96 type:MM_FILEPAGES val:33 [ 64.315295] BUG: Bad rss-counter state mm:00000000d7571e96 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26443' (ECDSA) to the list of known hosts. 2023/06/21 05:06:07 fuzzer started 2023/06/21 05:06:07 dialing manager at localhost:36067 2023/06/21 05:06:07 checking machine... 2023/06/21 05:06:07 checking revisions... [ 65.068021] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:06:07 testing simple program... [ 65.129015] cgroup: Unknown subsys name 'net' [ 65.175870] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:06:07 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85652c60 RCX=0000000000000100 RDX=1ffffffff0aca5a1 RSI=ffffffff814c84af RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a28 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f6eb7185366 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff8880186182e0 RIP=ffffffff814c84cb 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 00007f6eb6c92900 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=00007f6eb7249618 CR3=000000000ee22000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fcf5e02a510 CR3=000000000d832000 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=24c5c5e534a7ba8b16430627926d7527 XMM02=000000000011a5f0ec2efd57dc4c00df XMM03=0000000000121a58bb4e1321d66b4840 XMM04=ae8288a6f63159a300000000000ae988 XMM05=19e9129bd510f2350000000000131830 XMM06=54aadea146a22d580000000000130698 XMM07=e042d86d42eb936e0000000000121cd8 XMM08=bb4e1321d66b4840000000000011a650 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000