syzkaller login: [ 30.138041] BUG: Bad rss-counter state mm:00000000baea8fe3 type:MM_FILEPAGES val:33 [ 30.139714] BUG: Bad rss-counter state mm:00000000baea8fe3 type:MM_ANONPAGES val:22 [ 30.302446] ================================================================== [ 30.303410] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.304383] Read of size 8 at addr ffff88800de4bd08 by task sshd/220 [ 30.305174] [ 30.305395] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.306385] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.307376] Call Trace: [ 30.307700] [ 30.307993] dump_stack_lvl+0x91/0xf0 [ 30.308498] print_report+0xcc/0x620 [ 30.308985] ? __virt_addr_valid+0x102/0x340 [ 30.309549] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.310180] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.310813] kasan_report+0xbe/0xf0 [ 30.311312] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.311946] vma_interval_tree_remove+0xc75/0xec0 [ 30.312556] vma_prepare+0xc54/0x11a0 [ 30.313048] __split_vma+0x5af/0x950 [ 30.313533] ? __pfx___split_vma+0x10/0x10 [ 30.314073] ? find_held_lock+0x2c/0x110 [ 30.314606] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.315174] ? lock_is_held_type+0x9f/0x120 [ 30.315730] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.316340] ? mtree_range_walk+0x632/0x900 [ 30.316903] ? mas_walk+0x5c7/0x7c0 [ 30.317385] do_vmi_munmap+0x1f1/0x2b0 [ 30.317879] mmap_region+0x1f9/0x2660 [ 30.318371] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.318880] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.319608] ? __pfx_lock_acquire+0x10/0x10 [ 30.320150] ? __pfx_mmap_region+0x10/0x10 [ 30.320686] ? security_mmap_addr+0x7d/0xa0 [ 30.321229] ? get_unmapped_area+0x1f5/0x3f0 [ 30.321784] do_mmap+0x854/0xf00 [ 30.322232] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.322731] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.323329] ksys_mmap_pgoff+0x3af/0x500 [ 30.323851] do_syscall_64+0x3f/0x90 [ 30.324345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.325007] RIP: 0033:0x7f0274fa4d82 [ 30.325479] 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 [ 30.327648] RSP: 002b:00007fff91c68ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.328566] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0274fa4d82 [ 30.329430] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f02743de000 [ 30.330290] RBP: 00007f02743de000 R08: 0000000000000009 R09: 0000000000001000 [ 30.331150] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580e9433f70 [ 30.332023] R13: 00007fff91c68ad0 R14: 00007fff91c68b00 R15: 00007fff91c68e60 [ 30.332884] [ 30.333181] [ 30.333399] Allocated by task 213: [ 30.333830] kasan_save_stack+0x22/0x50 [ 30.334343] kasan_set_track+0x25/0x30 [ 30.334841] __kasan_slab_alloc+0x59/0x70 [ 30.335402] kmem_cache_alloc+0x16b/0x370 [ 30.335926] vm_area_dup+0x20/0x160 [ 30.336383] __split_vma+0x170/0x950 [ 30.336859] split_vma+0xc6/0x110 [ 30.337315] mprotect_fixup+0x8d2/0xb30 [ 30.337823] do_mprotect_pkey+0x87e/0xd40 [ 30.338349] __x64_sys_mprotect+0x78/0xc0 [ 30.338888] do_syscall_64+0x3f/0x90 [ 30.339368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.340022] [ 30.340243] Freed by task 213: [ 30.340642] kasan_save_stack+0x22/0x50 [ 30.341148] kasan_set_track+0x25/0x30 [ 30.341652] kasan_save_free_info+0x2b/0x50 [ 30.342196] __kasan_slab_free+0x10a/0x190 [ 30.342726] kmem_cache_free+0x10d/0x4d0 [ 30.343238] rcu_core+0x8c8/0x2860 [ 30.343709] __do_softirq+0x1b7/0x7d4 [ 30.344196] [ 30.344411] Last potentially related work creation: [ 30.344997] kasan_save_stack+0x22/0x50 [ 30.345502] __kasan_record_aux_stack+0x8e/0xa0 [ 30.346096] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.346743] remove_vma+0x139/0x170 [ 30.347201] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.347771] do_vmi_munmap+0x1f1/0x2b0 [ 30.348264] __vm_munmap+0x138/0x3a0 [ 30.348738] __x64_sys_munmap+0x59/0x80 [ 30.349246] do_syscall_64+0x3f/0x90 [ 30.349726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.350396] [ 30.350615] The buggy address belongs to the object at ffff88800de4bcb0 [ 30.350615] which belongs to the cache vm_area_struct of size 168 [ 30.352099] The buggy address is located 88 bytes inside of [ 30.352099] freed 168-byte region [ffff88800de4bcb0, ffff88800de4bd58) [ 30.353518] [ 30.353737] The buggy address belongs to the physical page: [ 30.354408] page:000000006d67304d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde4b [ 30.355513] memcg:ffff888019f80b01 [ 30.355945] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.356596] page_type: 0xffffffff() [ 30.357052] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.357983] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f80b01 [ 30.358906] page dumped because: kasan: bad access detected [ 30.359581] [ 30.359801] Memory state around the buggy address: [ 30.360393] ffff88800de4bc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.361259] ffff88800de4bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.362126] >ffff88800de4bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.362984] ^ [ 30.363446] ffff88800de4bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.364328] ffff88800de4be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.365185] ================================================================== [ 30.366524] Disabling lock debugging due to kernel taint [ 31.945087] BUG: Bad rss-counter state mm:000000004b4cf84a type:MM_FILEPAGES val:33 [ 31.946126] BUG: Bad rss-counter state mm:000000004b4cf84a type:MM_ANONPAGES val:22 [ 32.516229] BUG: Bad rss-counter state mm:00000000df9e71d2 type:MM_FILEPAGES val:33 [ 32.517415] BUG: Bad rss-counter state mm:00000000df9e71d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54901' (ECDSA) to the list of known hosts. 2023/06/20 22:28:59 fuzzer started 2023/06/20 22:28:59 dialing manager at localhost:36067 2023/06/20 22:28:59 checking machine... 2023/06/20 22:28:59 checking revisions... [ 33.260519] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:28:59 testing simple program... [ 33.313424] cgroup: Unknown subsys name 'net' [ 33.371840] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:28:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85616740 RBP=ffff888008d91b40 RSP=ffff888008da7d60 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffed10011b2368 R13=ffff88806cf35000 R14=0000000000000000 R15=ffff888008d91b40 RIP=ffffffff812e001e RFL=00000086 [--S--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 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=00007f7fb59cba60 CR3=000000000d6d6000 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=521cbcd312fbb6884345b072e87b7eda XMM02=000000000011da50ec2efd57dc4c00df XMM03=00000000001221f0578621bcb283bb7c XMM04=011f8dc373c5d4cf00000000000ae988 XMM05=19e9129bd510f2350000000000132010 XMM06=eb1305e106c053e20000000000130e78 XMM07=e042d86d42eb936e0000000000122470 XMM08=578621bcb283bb7c000000000011dab0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff88801a079b40 RCX=ffffffff812e0854 RDX=1ffff1100340f596 RSI=0000000000000004 RDI=ffff88801a07acb0 RBP=00000000fffbe937 RSP=ffff888019caf8c0 R8 =0000000000000001 R9 =ffffed1001fd0417 R10=ffff88800fe820bb R11=00000000000b6a61 R12=ffff8880160f4d80 R13=0000000000000000 R14=000000000000017e R15=ffff88800fe82000 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 00007fc7a32dc700 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=00007f46128d4618 CR3=000000000dc82000 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=2038353a38323a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a38323a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000