syzkaller login: [ 38.706066] BUG: Bad rss-counter state mm:000000007efd2a2d type:MM_FILEPAGES val:33 [ 38.707742] BUG: Bad rss-counter state mm:000000007efd2a2d type:MM_ANONPAGES val:22 [ 38.865014] ================================================================== [ 38.865929] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.866870] Read of size 8 at addr ffff88801a0015c8 by task sshd/227 [ 38.867649] [ 38.867867] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.868906] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.869872] Call Trace: [ 38.870191] [ 38.870621] dump_stack_lvl+0x91/0xf0 [ 38.871210] print_report+0xcc/0x620 [ 38.871783] ? __virt_addr_valid+0x102/0x340 [ 38.872428] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.873148] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.873867] kasan_report+0xbe/0xf0 [ 38.874429] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.875166] vma_interval_tree_remove+0xc75/0xec0 [ 38.875871] vma_prepare+0xc54/0x11a0 [ 38.876434] __split_vma+0x5af/0x950 [ 38.876988] ? __pfx___split_vma+0x10/0x10 [ 38.877611] ? find_held_lock+0x2c/0x110 [ 38.878218] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.878899] ? lock_is_held_type+0x9f/0x120 [ 38.879537] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.880151] ? mtree_range_walk+0x632/0x900 [ 38.880694] ? mas_walk+0x5c7/0x7c0 [ 38.881171] do_vmi_munmap+0x1f1/0x2b0 [ 38.881659] mmap_region+0x1f9/0x2660 [ 38.882134] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.882657] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.883361] ? __pfx_lock_acquire+0x10/0x10 [ 38.883887] ? __pfx_mmap_region+0x10/0x10 [ 38.884404] ? security_mmap_addr+0x7d/0xa0 [ 38.884935] ? get_unmapped_area+0x1f5/0x3f0 [ 38.885481] do_mmap+0x854/0xf00 [ 38.885916] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.886405] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.886991] ksys_mmap_pgoff+0x3af/0x500 [ 38.887499] do_syscall_64+0x3f/0x90 [ 38.887974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.888617] RIP: 0033:0x7f80504ddd82 [ 38.889072] 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 [ 38.891189] RSP: 002b:00007ffe1679c7a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.892092] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f80504ddd82 [ 38.892940] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f804f917000 [ 38.893785] RBP: 00007f804f917000 R08: 0000000000000009 R09: 0000000000001000 [ 38.894634] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f9f5ffb20 [ 38.895484] R13: 00007ffe1679c7c0 R14: 00007ffe1679c7f0 R15: 00007ffe1679cb50 [ 38.896330] [ 38.896623] [ 38.896840] Allocated by task 220: [ 38.897262] kasan_save_stack+0x22/0x50 [ 38.897765] kasan_set_track+0x25/0x30 [ 38.898253] __kasan_slab_alloc+0x59/0x70 [ 38.898802] kmem_cache_alloc+0x16b/0x370 [ 38.899310] vm_area_dup+0x20/0x160 [ 38.899758] __split_vma+0x170/0x950 [ 38.900218] split_vma+0xc6/0x110 [ 38.900653] mprotect_fixup+0x8d2/0xb30 [ 38.901146] do_mprotect_pkey+0x87e/0xd40 [ 38.901659] __x64_sys_mprotect+0x78/0xc0 [ 38.902176] do_syscall_64+0x3f/0x90 [ 38.902659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903292] [ 38.903506] Freed by task 204: [ 38.903890] kasan_save_stack+0x22/0x50 [ 38.904385] kasan_set_track+0x25/0x30 [ 38.904870] kasan_save_free_info+0x2b/0x50 [ 38.905400] __kasan_slab_free+0x10a/0x190 [ 38.905923] kmem_cache_free+0x10d/0x4d0 [ 38.906422] rcu_core+0x8c8/0x2860 [ 38.906901] __do_softirq+0x1b7/0x7d4 [ 38.907379] [ 38.907595] Last potentially related work creation: [ 38.908182] kasan_save_stack+0x22/0x50 [ 38.908685] __kasan_record_aux_stack+0x8e/0xa0 [ 38.909353] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.909997] remove_vma+0x139/0x170 [ 38.910456] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.911020] do_vmi_munmap+0x1f1/0x2b0 [ 38.911510] __vm_munmap+0x138/0x3a0 [ 38.911981] __x64_sys_munmap+0x59/0x80 [ 38.912470] do_syscall_64+0x3f/0x90 [ 38.912947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913634] [ 38.913854] The buggy address belongs to the object at ffff88801a001570 [ 38.913854] which belongs to the cache vm_area_struct of size 168 [ 38.915373] The buggy address is located 88 bytes inside of [ 38.915373] freed 168-byte region [ffff88801a001570, ffff88801a001618) [ 38.916771] [ 38.916985] The buggy address belongs to the physical page: [ 38.917643] page:00000000ca5e097e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a001 [ 38.918758] memcg:ffff88801941e601 [ 38.919187] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.919848] page_type: 0xffffffff() [ 38.920299] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.921212] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801941e601 [ 38.922118] page dumped because: kasan: bad access detected [ 38.922788] [ 38.923003] Memory state around the buggy address: [ 38.923579] ffff88801a001480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.924424] ffff88801a001500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.925279] >ffff88801a001580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.926131] ^ [ 38.926808] ffff88801a001600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.927662] ffff88801a001680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.928504] ================================================================== [ 38.929640] Disabling lock debugging due to kernel taint [ 40.974815] BUG: Bad rss-counter state mm:000000008abc4156 type:MM_FILEPAGES val:33 [ 40.975924] BUG: Bad rss-counter state mm:000000008abc4156 type:MM_ANONPAGES val:22 [ 41.465710] BUG: Bad rss-counter state mm:0000000069f70e1d type:MM_FILEPAGES val:33 [ 41.466860] BUG: Bad rss-counter state mm:0000000069f70e1d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44851' (ECDSA) to the list of known hosts. 2023/06/20 15:21:47 fuzzer started 2023/06/20 15:21:48 dialing manager at localhost:36067 2023/06/20 15:21:48 checking machine... 2023/06/20 15:21:48 checking revisions... [ 42.237992] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:21:48 testing simple program... [ 42.291261] cgroup: Unknown subsys name 'net' [ 42.363365] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:21:47 Registers: info registers vcpu 0 RAX=0000000000000100 RBX=0000000000000002 RCX=ffffffff813782c0 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800c9890b8 RBP=ffff88800c9890b8 RSP=ffff88806ce09e50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff88800c9890b8 RIP=ffffffff814c086b 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 00007f7a64726900 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=00007f7a64cdd618 CR3=0000000009a2c000 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=ffff88801ad2d488 RBX=ffff88801ad2d488 RCX=ffffffff81b25890 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88801ad2d488 RBP=000000000000098c RSP=ffff88800950f1e0 R8 =0000000000000004 R9 =000000000000098c R10=0000000000001b1f R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800950f638 R14=0000000000001b1f R15=0000000000000000 RIP=ffffffff8180f032 RFL=00000202 [-------] 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=00007f3edcb6c000 CR3=000000000c4fa000 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=f80dab0b2969c8be4c41feca24e4090f XMM02=ec2efd57dc4c00df000000000011b730 XMM03=091080da91c63e59000000000011b800 XMM04=bd0f6db80c1cf15c00000000000ae988 XMM05=16bbfc4fa606b6250000000000131ce8 XMM06=8a122445ebc149b00000000000130ec0 XMM07=e042d86d42eb936e0000000000122418 XMM08=091080da91c63e59000000000011b800 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000