syzkaller login: [ 24.731707] BUG: Bad rss-counter state mm:00000000368ab40e type:MM_FILEPAGES val:33 [ 24.733262] BUG: Bad rss-counter state mm:00000000368ab40e type:MM_ANONPAGES val:22 [ 24.804105] ================================================================== [ 24.805019] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.805945] Read of size 8 at addr ffff8880141a7798 by task sshd/219 [ 24.806733] [ 24.807191] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.808043] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.809005] Call Trace: [ 24.809355] [ 24.809641] dump_stack_lvl+0x91/0xf0 [ 24.810121] print_report+0xcc/0x620 [ 24.810617] ? __virt_addr_valid+0x102/0x340 [ 24.811172] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.811855] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.812564] kasan_report+0xbe/0xf0 [ 24.813043] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.813756] vma_interval_tree_remove+0xc75/0xec0 [ 24.814448] vma_prepare+0xc54/0x11a0 [ 24.815034] __split_vma+0x5af/0x950 [ 24.815596] ? __pfx___split_vma+0x10/0x10 [ 24.816210] ? find_held_lock+0x2c/0x110 [ 24.816787] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.817357] ? lock_is_held_type+0x9f/0x120 [ 24.817885] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.818485] ? mtree_range_walk+0x632/0x900 [ 24.819047] ? mas_walk+0x5c7/0x7c0 [ 24.819517] do_vmi_munmap+0x1f1/0x2b0 [ 24.820015] mmap_region+0x1f9/0x2660 [ 24.820507] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.821029] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.821749] ? __pfx_lock_acquire+0x10/0x10 [ 24.822300] ? __pfx_mmap_region+0x10/0x10 [ 24.822840] ? security_mmap_addr+0x7d/0xa0 [ 24.823373] ? get_unmapped_area+0x1f5/0x3f0 [ 24.823946] do_mmap+0x854/0xf00 [ 24.824400] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.824896] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.825459] ksys_mmap_pgoff+0x3af/0x500 [ 24.825979] do_syscall_64+0x3f/0x90 [ 24.826460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.827128] RIP: 0033:0x7f7247c86d82 [ 24.827586] 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 [ 24.829778] RSP: 002b:00007fff8666cf28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.830754] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7247c86d82 [ 24.831631] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72470c0000 [ 24.832619] RBP: 00007f72470c0000 R08: 0000000000000009 R09: 0000000000001000 [ 24.833605] R10: 0000000000000812 R11: 0000000000000206 R12: 00005561df1bdec0 [ 24.834484] R13: 00007fff8666cf40 R14: 00007fff8666cf70 R15: 00007fff8666d2d0 [ 24.835524] [ 24.835816] [ 24.836033] Allocated by task 212: [ 24.836496] kasan_save_stack+0x22/0x50 [ 24.837109] kasan_set_track+0x25/0x30 [ 24.837605] __kasan_slab_alloc+0x59/0x70 [ 24.838128] kmem_cache_alloc+0x16b/0x370 [ 24.838797] vm_area_dup+0x20/0x160 [ 24.839255] __split_vma+0x170/0x950 [ 24.839722] split_vma+0xc6/0x110 [ 24.840174] mprotect_fixup+0x8d2/0xb30 [ 24.840688] do_mprotect_pkey+0x87e/0xd40 [ 24.841343] __x64_sys_mprotect+0x78/0xc0 [ 24.841902] do_syscall_64+0x3f/0x90 [ 24.842394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.843212] [ 24.843436] Freed by task 212: [ 24.843841] kasan_save_stack+0x22/0x50 [ 24.844366] kasan_set_track+0x25/0x30 [ 24.844876] kasan_save_free_info+0x2b/0x50 [ 24.845542] __kasan_slab_free+0x10a/0x190 [ 24.846145] kmem_cache_free+0x10d/0x4d0 [ 24.846679] rcu_core+0x8c8/0x2860 [ 24.847136] __do_softirq+0x1b7/0x7d4 [ 24.847628] [ 24.847845] Last potentially related work creation: [ 24.848442] kasan_save_stack+0x22/0x50 [ 24.848962] __kasan_record_aux_stack+0x8e/0xa0 [ 24.849564] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.850225] remove_vma+0x139/0x170 [ 24.850680] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.851252] do_vmi_munmap+0x1f1/0x2b0 [ 24.851907] __vm_munmap+0x138/0x3a0 [ 24.852393] __x64_sys_munmap+0x59/0x80 [ 24.852906] do_syscall_64+0x3f/0x90 [ 24.853411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.854222] [ 24.854451] The buggy address belongs to the object at ffff8880141a7740 [ 24.854451] which belongs to the cache vm_area_struct of size 168 [ 24.856030] The buggy address is located 88 bytes inside of [ 24.856030] freed 168-byte region [ffff8880141a7740, ffff8880141a77e8) [ 24.857563] [ 24.857849] The buggy address belongs to the physical page: [ 24.858605] page:000000008eee7ab0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x141a7 [ 24.859734] memcg:ffff88800c58c501 [ 24.860169] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.860850] page_type: 0xffffffff() [ 24.861319] raw: 0100000000000200 ffff88800879fc80 ffffea00004ecb80 dead000000000006 [ 24.862462] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c58c501 [ 24.863439] page dumped because: kasan: bad access detected [ 24.864300] [ 24.864535] Memory state around the buggy address: [ 24.865150] ffff8880141a7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.866225] ffff8880141a7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.867286] >ffff8880141a7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.868230] ^ [ 24.868843] ffff8880141a7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.869740] ffff8880141a7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.870772] ================================================================== [ 24.871821] Disabling lock debugging due to kernel taint [ 27.361009] BUG: Bad rss-counter state mm:00000000c512cd64 type:MM_FILEPAGES val:33 [ 27.362170] BUG: Bad rss-counter state mm:00000000c512cd64 type:MM_ANONPAGES val:22 [ 27.854459] BUG: Bad rss-counter state mm:000000003d4f5280 type:MM_FILEPAGES val:33 [ 27.855686] BUG: Bad rss-counter state mm:000000003d4f5280 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61810' (ECDSA) to the list of known hosts. 2023/06/19 15:26:28 fuzzer started 2023/06/19 15:26:28 dialing manager at localhost:44161 2023/06/19 15:26:28 checking machine... 2023/06/19 15:26:28 checking revisions... [ 28.561622] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:26:28 testing simple program... [ 28.613486] cgroup: Unknown subsys name 'net' [ 28.671664] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:26:27 Registers: info registers vcpu 0 RAX=ffffffff81ef1438 RBX=0000000000000001 RCX=ffffffff86136d88 RDX=dffffc0000000000 RSI=ffff88801d0e7cb0 RDI=1ffff11003a1cf47 RBP=ffff88801d0e7a38 RSP=ffff88801d0e7970 R8 =ffffffff86136d8c R9 =ffff88801d0e7a20 R10=0000000000038001 R11=0000000000020c48 R12=ffff88801d0e7a40 R13=ffff88801d0e7a28 R14=ffff88801d0e7cb8 R15=ffff88801d0e79e0 RIP=ffffffff8113106f 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 00007f4b451ba900 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=00007ffe612db000 CR3=000000000c644000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f5f74482b80 CR3=000000000d6aa000 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=ab4bc848e755ceb7fe4329c15ac7a530 XMM02=ec2efd57dc4c00df00000000001200f8 XMM03=6e7f8197404b3e4900000000001201c8 XMM04=e7328c1f691eef6f00000000000ae988 XMM05=dfcdbad4f1609c370000000000134d08 XMM06=8cdcaedfaa62a7fe0000000000133ee0 XMM07=e042d86d42eb936e0000000000125450 XMM08=6e7f8197404b3e4900000000001201c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000