syzkaller login: [ 38.691240] BUG: Bad rss-counter state mm:000000005a81471e type:MM_FILEPAGES val:33 [ 38.692383] BUG: Bad rss-counter state mm:000000005a81471e type:MM_ANONPAGES val:22 [ 38.851621] ================================================================== [ 38.852545] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.853494] Read of size 8 at addr ffff88800e53d310 by task sshd/228 [ 38.854259] [ 38.854558] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.855428] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.856418] Call Trace: [ 38.856760] [ 38.857051] dump_stack_lvl+0x91/0xf0 [ 38.857555] print_report+0xcc/0x620 [ 38.858041] ? __virt_addr_valid+0x102/0x340 [ 38.858605] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.859227] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.859844] kasan_report+0xbe/0xf0 [ 38.860327] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.861001] vma_interval_tree_remove+0xc75/0xec0 [ 38.861625] vma_prepare+0xc54/0x11a0 [ 38.862215] __split_vma+0x5af/0x950 [ 38.862848] ? __pfx___split_vma+0x10/0x10 [ 38.863429] ? find_held_lock+0x2c/0x110 [ 38.863985] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.864568] ? lock_is_held_type+0x9f/0x120 [ 38.865137] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.865755] ? mtree_range_walk+0x632/0x900 [ 38.866337] ? mas_walk+0x5c7/0x7c0 [ 38.866857] do_vmi_munmap+0x1f1/0x2b0 [ 38.867353] mmap_region+0x1f9/0x2660 [ 38.867876] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.868422] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.869179] ? __pfx_lock_acquire+0x10/0x10 [ 38.869742] ? __pfx_mmap_region+0x10/0x10 [ 38.870324] ? security_mmap_addr+0x7d/0xa0 [ 38.870900] ? get_unmapped_area+0x1f5/0x3f0 [ 38.871480] do_mmap+0x854/0xf00 [ 38.871950] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.872471] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.873067] ksys_mmap_pgoff+0x3af/0x500 [ 38.873594] do_syscall_64+0x3f/0x90 [ 38.874099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.874775] RIP: 0033:0x7f25c1c22d82 [ 38.875245] 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 [ 38.877399] RSP: 002b:00007ffe7db6c988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.878358] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f25c1c22d82 [ 38.879252] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f25c105c000 [ 38.880104] RBP: 00007f25c105c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.880971] R10: 0000000000000812 R11: 0000000000000206 R12: 00005578847b5b20 [ 38.881831] R13: 00007ffe7db6c9a0 R14: 00007ffe7db6c9d0 R15: 00007ffe7db6cd30 [ 38.882713] [ 38.883019] [ 38.883235] Allocated by task 221: [ 38.883664] kasan_save_stack+0x22/0x50 [ 38.884182] kasan_set_track+0x25/0x30 [ 38.884680] __kasan_slab_alloc+0x59/0x70 [ 38.885221] kmem_cache_alloc+0x16b/0x370 [ 38.885741] vm_area_dup+0x20/0x160 [ 38.886221] __split_vma+0x170/0x950 [ 38.886714] split_vma+0xc6/0x110 [ 38.887166] mprotect_fixup+0x8d2/0xb30 [ 38.887667] do_mprotect_pkey+0x87e/0xd40 [ 38.888198] __x64_sys_mprotect+0x78/0xc0 [ 38.888730] do_syscall_64+0x3f/0x90 [ 38.889226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.889900] [ 38.890127] Freed by task 221: [ 38.890540] kasan_save_stack+0x22/0x50 [ 38.891062] kasan_set_track+0x25/0x30 [ 38.891566] kasan_save_free_info+0x2b/0x50 [ 38.892119] __kasan_slab_free+0x10a/0x190 [ 38.892664] kmem_cache_free+0x10d/0x4d0 [ 38.893200] rcu_core+0x8c8/0x2860 [ 38.893648] __do_softirq+0x1b7/0x7d4 [ 38.894157] [ 38.894377] Last potentially related work creation: [ 38.895001] kasan_save_stack+0x22/0x50 [ 38.895516] __kasan_record_aux_stack+0x8e/0xa0 [ 38.896112] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.896761] remove_vma+0x139/0x170 [ 38.897226] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.897791] do_vmi_munmap+0x1f1/0x2b0 [ 38.898305] __vm_munmap+0x138/0x3a0 [ 38.898794] __x64_sys_munmap+0x59/0x80 [ 38.899313] do_syscall_64+0x3f/0x90 [ 38.899807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.900472] [ 38.900691] The buggy address belongs to the object at ffff88800e53d2b8 [ 38.900691] which belongs to the cache vm_area_struct of size 168 [ 38.902216] The buggy address is located 88 bytes inside of [ 38.902216] freed 168-byte region [ffff88800e53d2b8, ffff88800e53d360) [ 38.903687] [ 38.903916] The buggy address belongs to the physical page: [ 38.904589] page:000000002bf1dc04 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe53d [ 38.905702] memcg:ffff88800ce3fa01 [ 38.906160] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.906910] page_type: 0xffffffff() [ 38.907371] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.908319] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce3fa01 [ 38.909263] page dumped because: kasan: bad access detected [ 38.909954] [ 38.910178] Memory state around the buggy address: [ 38.910787] ffff88800e53d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.911675] ffff88800e53d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.912575] >ffff88800e53d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.913452] ^ [ 38.913955] ffff88800e53d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.914870] ffff88800e53d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.915731] ================================================================== [ 38.916735] Disabling lock debugging due to kernel taint [ 40.942248] BUG: Bad rss-counter state mm:00000000cb579707 type:MM_FILEPAGES val:33 [ 40.943945] BUG: Bad rss-counter state mm:00000000cb579707 type:MM_ANONPAGES val:22 [ 41.423269] BUG: Bad rss-counter state mm:000000003a2135c8 type:MM_FILEPAGES val:33 [ 41.424247] BUG: Bad rss-counter state mm:000000003a2135c8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47775' (ECDSA) to the list of known hosts. 2023/06/20 10:56:06 fuzzer started 2023/06/20 10:56:06 dialing manager at localhost:36067 2023/06/20 10:56:06 checking machine... 2023/06/20 10:56:06 checking revisions... [ 42.130377] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:56:06 testing simple program... [ 42.182698] cgroup: Unknown subsys name 'net' [ 42.232101] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:56:06 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff8880146b83f4 RBP=ffff8880146b8000 RSP=ffff8880146b7d10 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d7d R12=ffff8880146b8000 R13=ffffea000039f900 R14=ffffffff8186b835 R15=ffff888017ed7200 RIP=ffffffff8137450d 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f39404b5900 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=00007f393f8b6ce0 CR3=000000000d5ca000 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=ff3a8666c22e8995bd4257444449d079 XMM02=5f6d65747379733a755f6d6574737973 XMM03=2c67c8bc2e329bc3000000000011aa58 XMM04=ce25de9d123a0f2100000000000ae988 XMM05=c439ee9163b12c5a0000000000132408 XMM06=94aac670ef06ff650000000000130e88 XMM07=fb795ef6d657705600000000001213f8 XMM08=2c67c8bc2e329bc3000000000011aa58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff814c856d RDX=ffff888017ea1b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016547398 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff8880169c4980 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 00007f75284e4900 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=00007f7528a9b618 CR3=00000000164ca000 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=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