syzkaller login: [ 30.520627] BUG: Bad rss-counter state mm:000000007fc50812 type:MM_FILEPAGES val:33 [ 30.521815] BUG: Bad rss-counter state mm:000000007fc50812 type:MM_ANONPAGES val:22 [ 30.686624] ================================================================== [ 30.687699] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.688819] Read of size 8 at addr ffff888019d9c4e0 by task sshd/220 [ 30.689719] [ 30.689986] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.690856] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.691844] Call Trace: [ 30.692175] [ 30.692459] dump_stack_lvl+0x91/0xf0 [ 30.692948] print_report+0xcc/0x620 [ 30.693440] ? __virt_addr_valid+0x102/0x340 [ 30.693994] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.694614] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.695234] kasan_report+0xbe/0xf0 [ 30.695742] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.696363] vma_interval_tree_remove+0xc75/0xec0 [ 30.696967] vma_prepare+0xc54/0x11a0 [ 30.697453] __split_vma+0x5af/0x950 [ 30.697926] ? __pfx___split_vma+0x10/0x10 [ 30.698450] ? find_held_lock+0x2c/0x110 [ 30.698974] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.699543] ? lock_is_held_type+0x9f/0x120 [ 30.700089] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.700702] ? mtree_range_walk+0x632/0x900 [ 30.701251] ? mas_walk+0x5c7/0x7c0 [ 30.701727] do_vmi_munmap+0x1f1/0x2b0 [ 30.702215] mmap_region+0x1f9/0x2660 [ 30.702698] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.703213] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.703929] ? __pfx_lock_acquire+0x10/0x10 [ 30.704466] ? __pfx_mmap_region+0x10/0x10 [ 30.705002] ? security_mmap_addr+0x7d/0xa0 [ 30.705537] ? get_unmapped_area+0x1f5/0x3f0 [ 30.706086] do_mmap+0x854/0xf00 [ 30.706524] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.707016] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.707574] ksys_mmap_pgoff+0x3af/0x500 [ 30.708098] do_syscall_64+0x3f/0x90 [ 30.708574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.709213] RIP: 0033:0x7f2f35dbfd82 [ 30.709669] 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 [ 30.711782] RSP: 002b:00007ffea6936448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.712678] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f35dbfd82 [ 30.713517] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f351f9000 [ 30.714358] RBP: 00007f2f351f9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.715200] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a2f0a15ec0 [ 30.716054] R13: 00007ffea6936460 R14: 00007ffea6936490 R15: 00007ffea69367f0 [ 30.716910] [ 30.717202] [ 30.717415] Allocated by task 213: [ 30.717843] kasan_save_stack+0x22/0x50 [ 30.718343] kasan_set_track+0x25/0x30 [ 30.718833] __kasan_slab_alloc+0x59/0x70 [ 30.719354] kmem_cache_alloc+0x16b/0x370 [ 30.719885] vm_area_dup+0x20/0x160 [ 30.720339] __split_vma+0x170/0x950 [ 30.720811] split_vma+0xc6/0x110 [ 30.721248] mprotect_fixup+0x8d2/0xb30 [ 30.721753] do_mprotect_pkey+0x87e/0xd40 [ 30.722270] __x64_sys_mprotect+0x78/0xc0 [ 30.722792] do_syscall_64+0x3f/0x90 [ 30.723262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.723916] [ 30.724134] Freed by task 213: [ 30.724528] kasan_save_stack+0x22/0x50 [ 30.725030] kasan_set_track+0x25/0x30 [ 30.725527] kasan_save_free_info+0x2b/0x50 [ 30.726056] __kasan_slab_free+0x10a/0x190 [ 30.726587] kmem_cache_free+0x10d/0x4d0 [ 30.727090] rcu_core+0x8c8/0x2860 [ 30.727532] __do_softirq+0x1b7/0x7d4 [ 30.728013] [ 30.728230] Last potentially related work creation: [ 30.728813] kasan_save_stack+0x22/0x50 [ 30.729315] __kasan_record_aux_stack+0x8e/0xa0 [ 30.729893] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.730534] remove_vma+0x139/0x170 [ 30.731072] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.731634] do_vmi_munmap+0x1f1/0x2b0 [ 30.732138] __vm_munmap+0x138/0x3a0 [ 30.732606] __x64_sys_munmap+0x59/0x80 [ 30.733103] do_syscall_64+0x3f/0x90 [ 30.733575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.734214] [ 30.734430] The buggy address belongs to the object at ffff888019d9c488 [ 30.734430] which belongs to the cache vm_area_struct of size 168 [ 30.735902] The buggy address is located 88 bytes inside of [ 30.735902] freed 168-byte region [ffff888019d9c488, ffff888019d9c530) [ 30.737302] [ 30.737520] The buggy address belongs to the physical page: [ 30.738175] page:00000000523d308e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d9c [ 30.739271] memcg:ffff888019e47501 [ 30.739699] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.740372] page_type: 0xffffffff() [ 30.740826] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.741743] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e47501 [ 30.742648] page dumped because: kasan: bad access detected [ 30.743315] [ 30.743535] Memory state around the buggy address: [ 30.744115] ffff888019d9c380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.744965] ffff888019d9c400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.745844] >ffff888019d9c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.746696] ^ [ 30.747458] ffff888019d9c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.748315] ffff888019d9c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.749223] ================================================================== [ 30.750270] Disabling lock debugging due to kernel taint [ 32.839048] BUG: Bad rss-counter state mm:0000000048085b9c type:MM_FILEPAGES val:33 [ 32.840636] BUG: Bad rss-counter state mm:0000000048085b9c type:MM_ANONPAGES val:22 [ 33.277481] BUG: Bad rss-counter state mm:00000000872d0d42 type:MM_FILEPAGES val:33 [ 33.279118] BUG: Bad rss-counter state mm:00000000872d0d42 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65516' (ECDSA) to the list of known hosts. 2023/06/20 04:06:41 fuzzer started 2023/06/20 04:06:42 dialing manager at localhost:44161 2023/06/20 04:06:42 checking machine... 2023/06/20 04:06:42 checking revisions... [ 33.957617] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:06:42 testing simple program... [ 34.008604] cgroup: Unknown subsys name 'net' [ 34.068645] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:06:41 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=00007fa35d5de477 RCX=1ffffffff0ba72c0 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007fa35d5de477 RSP=ffff88806ce09a18 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007fa35d5de000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff888018e48000 R15=ffff88800da22a80 RIP=ffffffff811fc73d RFL=00000202 [-------] 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 00007fa35d0eb900 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=00007fa35d6a0650 CR3=000000000c564000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c58400 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=00007f402eb61c40 CR3=000000000c7ca000 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=ce7e13add2915fa67840181d0c79f931 XMM02=000000000011cd98ec2efd57dc4c00df XMM03=0000000000124310b6a77c344071800a XMM04=f8381450cc19cec300000000000ae988 XMM05=19e9129bd510f2350000000000133eb0 XMM06=4c714fa0a0bc67290000000000132d18 XMM07=e042d86d42eb936e0000000000124590 XMM08=b6a77c344071800a000000000011cdf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000