syzkaller login: [ 30.663107] BUG: Bad rss-counter state mm:00000000d9b97f00 type:MM_FILEPAGES val:33 [ 30.664890] BUG: Bad rss-counter state mm:00000000d9b97f00 type:MM_ANONPAGES val:22 [ 30.828177] ================================================================== [ 30.829128] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.830119] Read of size 8 at addr ffff88800dcaeed8 by task sshd/219 [ 30.830915] [ 30.831333] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.832234] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.833247] Call Trace: [ 30.833592] <TASK> [ 30.833892] dump_stack_lvl+0x91/0xf0 [ 30.834401] print_report+0xcc/0x620 [ 30.834903] ? __virt_addr_valid+0x102/0x340 [ 30.835498] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.836135] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.836777] kasan_report+0xbe/0xf0 [ 30.837272] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.837923] vma_interval_tree_remove+0xc75/0xec0 [ 30.838550] vma_prepare+0xc54/0x11a0 [ 30.839049] __split_vma+0x5af/0x950 [ 30.839555] ? __pfx___split_vma+0x10/0x10 [ 30.840103] ? find_held_lock+0x2c/0x110 [ 30.840644] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.841230] ? lock_is_held_type+0x9f/0x120 [ 30.841789] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.842421] ? mtree_range_walk+0x632/0x900 [ 30.842989] ? mas_walk+0x5c7/0x7c0 [ 30.843491] do_vmi_munmap+0x1f1/0x2b0 [ 30.844003] mmap_region+0x1f9/0x2660 [ 30.844509] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.845042] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.845795] ? __pfx_lock_acquire+0x10/0x10 [ 30.846339] ? __pfx_mmap_region+0x10/0x10 [ 30.846888] ? security_mmap_addr+0x7d/0xa0 [ 30.847459] ? get_unmapped_area+0x1f5/0x3f0 [ 30.848026] do_mmap+0x854/0xf00 [ 30.848479] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.848991] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.849576] ksys_mmap_pgoff+0x3af/0x500 [ 30.850103] do_syscall_64+0x3f/0x90 [ 30.850598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.851279] RIP: 0033:0x7fe075f01d82 [ 30.851756] 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 [ 30.853974] RSP: 002b:00007ffc466a9858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.854901] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe075f01d82 [ 30.855787] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe07533b000 [ 30.856667] RBP: 00007fe07533b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.857551] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563d8c920ec0 [ 30.858426] R13: 00007ffc466a9870 R14: 00007ffc466a98a0 R15: 00007ffc466a9c00 [ 30.859336] </TASK> [ 30.859641] [ 30.859861] Allocated by task 212: [ 30.860306] kasan_save_stack+0x22/0x50 [ 30.860829] kasan_set_track+0x25/0x30 [ 30.861339] __kasan_slab_alloc+0x59/0x70 [ 30.861882] kmem_cache_alloc+0x16b/0x370 [ 30.862421] vm_area_dup+0x20/0x160 [ 30.862893] __split_vma+0x170/0x950 [ 30.863373] split_vma+0xc6/0x110 [ 30.863809] mprotect_fixup+0x8d2/0xb30 [ 30.864302] do_mprotect_pkey+0x87e/0xd40 [ 30.864820] __x64_sys_mprotect+0x78/0xc0 [ 30.865331] do_syscall_64+0x3f/0x90 [ 30.865806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.866446] [ 30.866659] Freed by task 212: [ 30.867047] kasan_save_stack+0x22/0x50 [ 30.867560] kasan_set_track+0x25/0x30 [ 30.868050] kasan_save_free_info+0x2b/0x50 [ 30.868573] __kasan_slab_free+0x10a/0x190 [ 30.869098] kmem_cache_free+0x10d/0x4d0 [ 30.869596] rcu_core+0x8c8/0x2860 [ 30.870034] __do_softirq+0x1b7/0x7d4 [ 30.870501] [ 30.870713] Last potentially related work creation: [ 30.871313] kasan_save_stack+0x22/0x50 [ 30.871810] __kasan_record_aux_stack+0x8e/0xa0 [ 30.872444] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.873083] remove_vma+0x139/0x170 [ 30.873551] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.874127] do_vmi_munmap+0x1f1/0x2b0 [ 30.874632] __vm_munmap+0x138/0x3a0 [ 30.875115] __x64_sys_munmap+0x59/0x80 [ 30.875645] do_syscall_64+0x3f/0x90 [ 30.876134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.876792] [ 30.877014] The buggy address belongs to the object at ffff88800dcaee80 [ 30.877014] which belongs to the cache vm_area_struct of size 168 [ 30.878552] The buggy address is located 88 bytes inside of [ 30.878552] freed 168-byte region [ffff88800dcaee80, ffff88800dcaef28) [ 30.880036] [ 30.880262] The buggy address belongs to the physical page: [ 30.880954] page:00000000621f30f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcae [ 30.882087] memcg:ffff88801b2c6d01 [ 30.882536] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.883215] page_type: 0xffffffff() [ 30.883699] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.884654] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b2c6d01 [ 30.885596] page dumped because: kasan: bad access detected [ 30.886283] [ 30.886511] Memory state around the buggy address: [ 30.887116] ffff88800dcaed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.888027] ffff88800dcaee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.888910] >ffff88800dcaee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.889802] ^ [ 30.890562] ffff88800dcaef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.891459] ffff88800dcaef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.892336] ================================================================== [ 30.893365] Disabling lock debugging due to kernel taint [ 33.159159] BUG: Bad rss-counter state mm:000000003067aac8 type:MM_FILEPAGES val:33 [ 33.160224] BUG: Bad rss-counter state mm:000000003067aac8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64130' (ECDSA) to the list of known hosts. [ 33.756445] BUG: Bad rss-counter state mm:000000000ea95865 type:MM_FILEPAGES val:33 [ 33.757768] BUG: Bad rss-counter state mm:000000000ea95865 type:MM_ANONPAGES val:22 2023/06/20 07:06:28 fuzzer started 2023/06/20 07:06:29 dialing manager at localhost:44161 2023/06/20 07:06:29 checking machine... 2023/06/20 07:06:29 checking revisions... [ 34.384560] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:06:29 testing simple program... [ 34.437595] cgroup: Unknown subsys name 'net' [ 34.488723] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:06:28 Registers: info registers vcpu 0 RAX=1ffff11001fd0a85 RBX=ffff88800fe853f8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800fe85428 RBP=ffff88800fe84570 RSP=ffff88800edbf8e8 R8 =0000000000000001 R9 =ffffed1001db7f11 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800fd28640 R14=ffffffff8366dfdf R15=0000000000000000 RIP=ffffffff8184636c RFL=00000046 [---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 00007fb639714900 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=00007fb639ccb618 CR3=000000001015a000 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=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=00007f9302ccfb30 CR3=000000000d53c000 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=59a24ffde0bef8bc744c26a745286288 XMM02=2c67c8bc2e329bc3000000000011dea0 XMM03=fb795ef6d65770560000000000124840 XMM04=76c389e497f83dd900000000000ae988 XMM05=dfcdbad4f1609c3700000000001340e0 XMM06=806171799158d9670000000000133f68 XMM07=e042d86d42eb936e0000000000124b18 XMM08=c66a9c43cf1cf07c000000000011df00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000