syzkaller login: [ 31.251116] BUG: Bad rss-counter state mm:000000005d89055d type:MM_FILEPAGES val:33 [ 31.252570] BUG: Bad rss-counter state mm:000000005d89055d type:MM_ANONPAGES val:22 [ 31.291755] ================================================================== [ 31.292698] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.293620] Read of size 8 at addr ffff88801a276ed8 by task sshd/222 [ 31.294482] [ 31.294756] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.295661] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.296588] Call Trace: [ 31.296911] [ 31.297209] dump_stack_lvl+0x91/0xf0 [ 31.297674] print_report+0xcc/0x620 [ 31.298131] ? __virt_addr_valid+0x102/0x340 [ 31.298707] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.299333] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.299961] kasan_report+0xbe/0xf0 [ 31.300421] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.301034] vma_interval_tree_remove+0xc75/0xec0 [ 31.301632] vma_prepare+0xc54/0x11a0 [ 31.302108] __split_vma+0x5af/0x950 [ 31.302565] ? __pfx___split_vma+0x10/0x10 [ 31.303077] ? find_held_lock+0x2c/0x110 [ 31.303592] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.304164] ? lock_is_held_type+0x9f/0x120 [ 31.304722] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.305318] ? mtree_range_walk+0x632/0x900 [ 31.305864] ? mas_walk+0x5c7/0x7c0 [ 31.306330] do_vmi_munmap+0x1f1/0x2b0 [ 31.306824] mmap_region+0x1f9/0x2660 [ 31.307295] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.307793] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.308504] ? __pfx_lock_acquire+0x10/0x10 [ 31.309029] ? __pfx_mmap_region+0x10/0x10 [ 31.309543] ? security_mmap_addr+0x7d/0xa0 [ 31.310064] ? get_unmapped_area+0x1f5/0x3f0 [ 31.310598] do_mmap+0x854/0xf00 [ 31.311020] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.311513] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.312071] ksys_mmap_pgoff+0x3af/0x500 [ 31.312562] do_syscall_64+0x3f/0x90 [ 31.313030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.313665] RIP: 0033:0x7f45597a6d82 [ 31.314108] 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 [ 31.316204] RSP: 002b:00007ffffddd3eb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.317085] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f45597a6d82 [ 31.317916] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4558be0000 [ 31.318769] RBP: 00007f4558be0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.319607] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a066fca980 [ 31.320494] R13: 00007ffffddd3ed0 R14: 00007ffffddd3f00 R15: 00007ffffddd4260 [ 31.321323] [ 31.321615] [ 31.321829] Allocated by task 214: [ 31.322243] kasan_save_stack+0x22/0x50 [ 31.322744] kasan_set_track+0x25/0x30 [ 31.323221] __kasan_slab_alloc+0x59/0x70 [ 31.323775] kmem_cache_alloc+0x16b/0x370 [ 31.324307] vm_area_dup+0x20/0x160 [ 31.324763] __split_vma+0x170/0x950 [ 31.325220] split_vma+0xc6/0x110 [ 31.325653] mprotect_fixup+0x8d2/0xb30 [ 31.326148] do_mprotect_pkey+0x87e/0xd40 [ 31.326660] __x64_sys_mprotect+0x78/0xc0 [ 31.327165] do_syscall_64+0x3f/0x90 [ 31.327626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.328293] [ 31.328507] Freed by task 13: [ 31.328878] kasan_save_stack+0x22/0x50 [ 31.329365] kasan_set_track+0x25/0x30 [ 31.329853] kasan_save_free_info+0x2b/0x50 [ 31.330378] __kasan_slab_free+0x10a/0x190 [ 31.330901] kmem_cache_free+0x10d/0x4d0 [ 31.331398] rcu_core+0x8c8/0x2860 [ 31.331840] __do_softirq+0x1b7/0x7d4 [ 31.332316] [ 31.332528] Last potentially related work creation: [ 31.333092] kasan_save_stack+0x22/0x50 [ 31.333586] __kasan_record_aux_stack+0x8e/0xa0 [ 31.334139] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.334768] remove_vma+0x139/0x170 [ 31.335195] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.335768] do_vmi_munmap+0x1f1/0x2b0 [ 31.336254] __vm_munmap+0x138/0x3a0 [ 31.336712] __x64_sys_munmap+0x59/0x80 [ 31.337200] do_syscall_64+0x3f/0x90 [ 31.337669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.338299] [ 31.338512] The buggy address belongs to the object at ffff88801a276e80 [ 31.338512] which belongs to the cache vm_area_struct of size 168 [ 31.339957] The buggy address is located 88 bytes inside of [ 31.339957] freed 168-byte region [ffff88801a276e80, ffff88801a276f28) [ 31.341326] [ 31.341539] The buggy address belongs to the physical page: [ 31.342192] page:00000000281fc76b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a276 [ 31.343258] memcg:ffff8880096c8101 [ 31.343675] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.344322] page_type: 0xffffffff() [ 31.344766] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.345664] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096c8101 [ 31.346560] page dumped because: kasan: bad access detected [ 31.347209] [ 31.347423] Memory state around the buggy address: [ 31.348000] ffff88801a276d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.348839] ffff88801a276e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.349678] >ffff88801a276e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.350518] ^ [ 31.351226] ffff88801a276f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.352250] ffff88801a276f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.353305] ================================================================== [ 31.354517] Disabling lock debugging due to kernel taint [ 33.591181] BUG: Bad rss-counter state mm:0000000011a8a982 type:MM_FILEPAGES val:33 [ 33.592375] BUG: Bad rss-counter state mm:0000000011a8a982 type:MM_ANONPAGES val:22 [ 34.016370] BUG: Bad rss-counter state mm:00000000cdf99470 type:MM_FILEPAGES val:33 [ 34.017563] BUG: Bad rss-counter state mm:00000000cdf99470 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6642' (ECDSA) to the list of known hosts. 2023/06/20 16:27:24 fuzzer started 2023/06/20 16:27:24 dialing manager at localhost:36067 2023/06/20 16:27:24 checking machine... 2023/06/20 16:27:24 checking revisions... [ 34.702751] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:27:24 testing simple program... [ 34.783805] cgroup: Unknown subsys name 'net' [ 34.855728] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:27:24 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00005619b31c4fe0 CR3=000000000e06c000 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=2034323a37323a3631203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a37323a3631203032 XMM08=3d656e696c646d632022656369767265 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=00007f3fe0510780 CR3=000000000c9f8000 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=d06e466a28ca09bdbc444138bbd318a3 XMM02=ec2efd57dc4c00df000000000011a128 XMM03=473f07a2bf504e3d000000000011a1f8 XMM04=ccef4da52ecc229700000000000ae988 XMM05=59e7084d6b4460410000000000131de8 XMM06=00c3ffa147b8d85700000000001317e0 XMM07=e042d86d42eb936e0000000000121d98 XMM08=473f07a2bf504e3d000000000011a1f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000