syzkaller login: [ 105.506944] BUG: Bad rss-counter state mm:00000000921f015e type:MM_FILEPAGES val:33 [ 105.507819] BUG: Bad rss-counter state mm:00000000921f015e type:MM_ANONPAGES val:22 [ 105.715462] ================================================================== [ 105.716100] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 105.716705] Read of size 8 at addr ffff88800c9f43f8 by task sshd/221 [ 105.717222] [ 105.717364] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 105.718206] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 105.719320] Call Trace: [ 105.719585] [ 105.719770] dump_stack_lvl+0x91/0xf0 [ 105.720134] print_report+0xcc/0x620 [ 105.720503] ? __virt_addr_valid+0x102/0x340 [ 105.720899] ? vma_interval_tree_remove+0xc75/0xec0 [ 105.721304] ? vma_interval_tree_remove+0xc75/0xec0 [ 105.721765] kasan_report+0xbe/0xf0 [ 105.722573] ? vma_interval_tree_remove+0xc75/0xec0 [ 105.722977] vma_interval_tree_remove+0xc75/0xec0 [ 105.723418] vma_prepare+0xc54/0x11a0 [ 105.723731] __split_vma+0x5af/0x950 [ 105.724065] ? __pfx___split_vma+0x10/0x10 [ 105.724448] ? find_held_lock+0x2c/0x110 [ 105.724780] do_vmi_align_munmap+0x2ba/0x11f0 [ 105.725186] ? lock_is_held_type+0x9f/0x120 [ 105.725593] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 105.726048] ? mtree_range_walk+0x632/0x900 [ 105.726465] ? mas_walk+0x5c7/0x7c0 [ 105.726773] do_vmi_munmap+0x1f1/0x2b0 [ 105.727139] mmap_region+0x1f9/0x2660 [ 105.727503] ? vm_mmap_pgoff+0x15c/0x3a0 [ 105.727840] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 105.728323] ? __pfx_lock_acquire+0x10/0x10 [ 105.728720] ? __pfx_mmap_region+0x10/0x10 [ 105.729060] ? security_mmap_addr+0x7d/0xa0 [ 105.729459] ? get_unmapped_area+0x1f5/0x3f0 [ 105.729829] do_mmap+0x854/0xf00 [ 105.730159] vm_mmap_pgoff+0x1a6/0x3a0 [ 105.730531] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 105.730925] ksys_mmap_pgoff+0x3af/0x500 [ 105.731250] do_syscall_64+0x3f/0x90 [ 105.731607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.732039] RIP: 0033:0x7f3a0646ad82 [ 105.732329] 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 [ 105.733861] RSP: 002b:00007ffde16202f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 105.734511] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a0646ad82 [ 105.735090] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a058a4000 [ 105.735704] RBP: 00007f3a058a4000 R08: 0000000000000009 R09: 0000000000001000 [ 105.736298] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556534653f70 [ 105.736888] R13: 00007ffde1620310 R14: 00007ffde1620340 R15: 00007ffde16206a0 [ 105.737550] [ 105.737741] [ 105.737911] Allocated by task 212: [ 105.738610] kasan_save_stack+0x22/0x50 [ 105.739524] kasan_set_track+0x25/0x30 [ 105.740433] __kasan_slab_alloc+0x59/0x70 [ 105.741326] kmem_cache_alloc+0x16b/0x370 [ 105.742302] vm_area_dup+0x20/0x160 [ 105.743136] __split_vma+0x170/0x950 [ 105.743957] split_vma+0xc6/0x110 [ 105.744772] mprotect_fixup+0x8d2/0xb30 [ 105.745690] do_mprotect_pkey+0x87e/0xd40 [ 105.746622] __x64_sys_mprotect+0x78/0xc0 [ 105.747582] do_syscall_64+0x3f/0x90 [ 105.748444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.749628] [ 105.749995] Freed by task 13: [ 105.750686] kasan_save_stack+0x22/0x50 [ 105.751567] kasan_set_track+0x25/0x30 [ 105.752481] kasan_save_free_info+0x2b/0x50 [ 105.753458] __kasan_slab_free+0x10a/0x190 [ 105.754446] kmem_cache_free+0x10d/0x4d0 [ 105.755318] rcu_core+0x8c8/0x2860 [ 105.756103] __do_softirq+0x1b7/0x7d4 [ 105.757062] [ 105.757488] Last potentially related work creation: [ 105.758588] kasan_save_stack+0x22/0x50 [ 105.759572] __kasan_record_aux_stack+0x8e/0xa0 [ 105.760669] __call_rcu_common.constprop.0+0x6a/0xb90 [ 105.762014] remove_vma+0x139/0x170 [ 105.762869] do_vmi_align_munmap+0xd4a/0x11f0 [ 105.764112] do_vmi_munmap+0x1f1/0x2b0 [ 105.765312] __vm_munmap+0x138/0x3a0 [ 105.766495] __x64_sys_munmap+0x59/0x80 [ 105.767467] do_syscall_64+0x3f/0x90 [ 105.768294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.769586] [ 105.769952] The buggy address belongs to the object at ffff88800c9f43a0 [ 105.769952] which belongs to the cache vm_area_struct of size 168 [ 105.772942] The buggy address is located 88 bytes inside of [ 105.772942] freed 168-byte region [ffff88800c9f43a0, ffff88800c9f4448) [ 105.775752] [ 105.776119] The buggy address belongs to the physical page: [ 105.777500] page:00000000d7a61cc8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9f4 [ 105.779622] memcg:ffff88800df86b01 [ 105.780446] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 105.781792] page_type: 0xffffffff() [ 105.782662] raw: 0100000000000200 ffff88800879fc80 ffffea000038e240 dead000000000003 [ 105.784217] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df86b01 [ 105.785806] page dumped because: kasan: bad access detected [ 105.787180] [ 105.787595] Memory state around the buggy address: [ 105.788711] ffff88800c9f4280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 105.790406] ffff88800c9f4300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 105.792035] >ffff88800c9f4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 105.793775] ^ [ 105.795448] ffff88800c9f4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 105.797102] ffff88800c9f4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 105.798832] ================================================================== [ 105.806026] Disabling lock debugging due to kernel taint [ 107.986408] BUG: Bad rss-counter state mm:0000000029e547f4 type:MM_FILEPAGES val:33 [ 107.987040] BUG: Bad rss-counter state mm:0000000029e547f4 type:MM_ANONPAGES val:22 [ 109.224939] BUG: Bad rss-counter state mm:0000000023bd8f67 type:MM_FILEPAGES val:33 [ 109.225654] BUG: Bad rss-counter state mm:0000000023bd8f67 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59540' (ECDSA) to the list of known hosts. 2023/06/20 10:01:44 fuzzer started 2023/06/20 10:01:44 dialing manager at localhost:44161 2023/06/20 10:01:44 checking machine... 2023/06/20 10:01:44 checking revisions... [ 110.337864] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:01:44 testing simple program... [ 110.406666] cgroup: Unknown subsys name 'net' [ 110.469304] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:00:28 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=00007ffc5c9b2d88 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=00007f461e333510000055745fb17790 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=0000000000000001 RCX=ffffffff8453084b RDX=fffffbfff0adb045 RSI=0000000000000004 RDI=ffffffff856d8220 RBP=ffffffff856d8220 RSP=ffff888019c47720 R8 =0000000000000000 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=00000000000b6996 R12=0000000000000003 R13=fffffbfff0adb044 R14=0000000000000001 R15=1ffff11003388ee5 RIP=ffffffff845308c8 RFL=00000002 [-------] 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 00007fb47fff6900 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=00007fb183675328 CR3=0000000016d68000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000