syzkaller login: [ 42.506061] BUG: Bad rss-counter state mm:00000000947a0367 type:MM_FILEPAGES val:33 [ 42.507209] BUG: Bad rss-counter state mm:00000000947a0367 type:MM_ANONPAGES val:22 [ 42.664971] ================================================================== [ 42.665883] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.666839] Read of size 8 at addr ffff88800eb92058 by task sshd/220 [ 42.667648] [ 42.667867] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.668747] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.669720] Call Trace: [ 42.670043] [ 42.670330] dump_stack_lvl+0x91/0xf0 [ 42.670836] print_report+0xcc/0x620 [ 42.671343] ? __virt_addr_valid+0x102/0x340 [ 42.671898] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.672523] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.673138] kasan_report+0xbe/0xf0 [ 42.673613] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.674231] vma_interval_tree_remove+0xc75/0xec0 [ 42.674844] vma_prepare+0xc54/0x11a0 [ 42.675342] __split_vma+0x5af/0x950 [ 42.675816] ? __pfx___split_vma+0x10/0x10 [ 42.676342] ? find_held_lock+0x2c/0x110 [ 42.676929] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.677590] ? lock_is_held_type+0x9f/0x120 [ 42.678160] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.678801] ? mtree_range_walk+0x632/0x900 [ 42.679414] ? mas_walk+0x5c7/0x7c0 [ 42.679917] do_vmi_munmap+0x1f1/0x2b0 [ 42.680435] mmap_region+0x1f9/0x2660 [ 42.680938] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.681467] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.682222] ? __pfx_lock_acquire+0x10/0x10 [ 42.682783] ? __pfx_mmap_region+0x10/0x10 [ 42.683359] ? security_mmap_addr+0x7d/0xa0 [ 42.683914] ? get_unmapped_area+0x1f5/0x3f0 [ 42.684500] do_mmap+0x854/0xf00 [ 42.684958] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.685486] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.686083] ksys_mmap_pgoff+0x3af/0x500 [ 42.686621] do_syscall_64+0x3f/0x90 [ 42.687131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.687815] RIP: 0033:0x7f313c752d82 [ 42.688295] 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 [ 42.690550] RSP: 002b:00007ffc90444c88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.691520] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f313c752d82 [ 42.692416] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f313bb8c000 [ 42.693308] RBP: 00007f313bb8c000 R08: 0000000000000009 R09: 0000000000001000 [ 42.694196] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b6fd37f60 [ 42.695092] R13: 00007ffc90444ca0 R14: 00007ffc90444cd0 R15: 00007ffc90445030 [ 42.696009] [ 42.696316] [ 42.696537] Allocated by task 213: [ 42.696992] kasan_save_stack+0x22/0x50 [ 42.697524] kasan_set_track+0x25/0x30 [ 42.698046] __kasan_slab_alloc+0x59/0x70 [ 42.698597] kmem_cache_alloc+0x16b/0x370 [ 42.699141] vm_area_dup+0x20/0x160 [ 42.699635] __split_vma+0x170/0x950 [ 42.700128] split_vma+0xc6/0x110 [ 42.700592] mprotect_fixup+0x8d2/0xb30 [ 42.701120] do_mprotect_pkey+0x87e/0xd40 [ 42.701674] __x64_sys_mprotect+0x78/0xc0 [ 42.702230] do_syscall_64+0x3f/0x90 [ 42.702728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.703433] [ 42.703660] Freed by task 204: [ 42.704077] kasan_save_stack+0x22/0x50 [ 42.704608] kasan_set_track+0x25/0x30 [ 42.705130] kasan_save_free_info+0x2b/0x50 [ 42.705692] __kasan_slab_free+0x10a/0x190 [ 42.706257] kmem_cache_free+0x10d/0x4d0 [ 42.706792] rcu_core+0x8c8/0x2860 [ 42.707261] __do_softirq+0x1b7/0x7d4 [ 42.707762] [ 42.707987] Last potentially related work creation: [ 42.708605] kasan_save_stack+0x22/0x50 [ 42.709128] __kasan_record_aux_stack+0x8e/0xa0 [ 42.709742] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.710421] remove_vma+0x139/0x170 [ 42.710897] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.711487] do_vmi_munmap+0x1f1/0x2b0 [ 42.711998] __vm_munmap+0x138/0x3a0 [ 42.712494] __x64_sys_munmap+0x59/0x80 [ 42.713020] do_syscall_64+0x3f/0x90 [ 42.713513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.714189] [ 42.714415] Second to last potentially related work creation: [ 42.715164] kasan_save_stack+0x22/0x50 [ 42.715694] __kasan_record_aux_stack+0x8e/0xa0 [ 42.716299] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.716984] remove_vma+0x139/0x170 [ 42.717453] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.718041] do_vmi_munmap+0x1f1/0x2b0 [ 42.718554] mmap_region+0x1f9/0x2660 [ 42.719051] do_mmap+0x854/0xf00 [ 42.719509] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.720022] ksys_mmap_pgoff+0x3af/0x500 [ 42.720550] do_syscall_64+0x3f/0x90 [ 42.721045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.721718] [ 42.721945] The buggy address belongs to the object at ffff88800eb92000 [ 42.721945] which belongs to the cache vm_area_struct of size 168 [ 42.723527] The buggy address is located 88 bytes inside of [ 42.723527] freed 168-byte region [ffff88800eb92000, ffff88800eb920a8) [ 42.725018] [ 42.725240] The buggy address belongs to the physical page: [ 42.725938] page:00000000c54cbcaf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb92 [ 42.727103] memcg:ffff8880095cd101 [ 42.727550] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.728237] page_type: 0xffffffff() [ 42.728712] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 42.729686] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095cd101 [ 42.730662] page dumped because: kasan: bad access detected [ 42.731370] [ 42.731594] Memory state around the buggy address: [ 42.732209] ffff88800eb91f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 42.733125] ffff88800eb91f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 42.734047] >ffff88800eb92000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.734945] ^ [ 42.735716] ffff88800eb92080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 42.736629] ffff88800eb92100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.737540] ================================================================== [ 42.738757] Disabling lock debugging due to kernel taint [ 45.639064] BUG: Bad rss-counter state mm:000000006f6acaa7 type:MM_FILEPAGES val:33 [ 45.639744] BUG: Bad rss-counter state mm:000000006f6acaa7 type:MM_ANONPAGES val:22 [ 46.043817] BUG: Bad rss-counter state mm:00000000f824875c type:MM_FILEPAGES val:33 [ 46.045016] BUG: Bad rss-counter state mm:00000000f824875c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11549' (ECDSA) to the list of known hosts. 2023/06/19 18:36:02 fuzzer started 2023/06/19 18:36:02 dialing manager at localhost:44161 2023/06/19 18:36:02 checking machine... 2023/06/19 18:36:02 checking revisions... [ 46.771977] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:36:02 testing simple program... [ 46.813309] cgroup: Unknown subsys name 'net' [ 46.850396] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:35:58 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffc2656f2f8 CR3=0000000005482000 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=00007f6390dba5100000558bc826c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000800 RCX=000000000000000b RDX=0000000000000800 RSI=0000000000000000 RDI=ffff88801769b500 RBP=ffff88800c9bfcd8 RSP=ffff88800c9bfc78 R8 =ffff88801769b000 R9 =0000000000000000 R10=ffff88801769b000 R11=00000000000b6996 R12=ffff888008442000 R13=0000000000000dc0 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff8450d40a 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 00007f0a3f976900 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=00007f0a3ff2e0b0 CR3=000000000ee8c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000