syzkaller login: [ 31.138130] BUG: Bad rss-counter state mm:00000000ec8decb8 type:MM_FILEPAGES val:33 [ 31.139497] BUG: Bad rss-counter state mm:00000000ec8decb8 type:MM_ANONPAGES val:22 [ 31.297613] ================================================================== [ 31.298902] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.300178] Read of size 8 at addr ffff88800eda6968 by task sshd/220 [ 31.300976] [ 31.301201] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.302096] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.303078] Call Trace: [ 31.303403] [ 31.303709] dump_stack_lvl+0x91/0xf0 [ 31.304214] print_report+0xcc/0x620 [ 31.304705] ? __virt_addr_valid+0x102/0x340 [ 31.305269] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.305888] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.306511] kasan_report+0xbe/0xf0 [ 31.306994] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.307642] vma_interval_tree_remove+0xc75/0xec0 [ 31.308242] vma_prepare+0xc54/0x11a0 [ 31.308724] __split_vma+0x5af/0x950 [ 31.309193] ? __pfx___split_vma+0x10/0x10 [ 31.309719] ? find_held_lock+0x2c/0x110 [ 31.310238] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.310805] ? lock_is_held_type+0x9f/0x120 [ 31.311341] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.312149] ? mtree_range_walk+0x632/0x900 [ 31.312886] ? mas_walk+0x5c7/0x7c0 [ 31.313516] do_vmi_munmap+0x1f1/0x2b0 [ 31.314171] mmap_region+0x1f9/0x2660 [ 31.314814] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.315513] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.316451] ? __pfx_lock_acquire+0x10/0x10 [ 31.317129] ? __pfx_mmap_region+0x10/0x10 [ 31.317673] ? security_mmap_addr+0x7d/0xa0 [ 31.318221] ? get_unmapped_area+0x1f5/0x3f0 [ 31.318792] do_mmap+0x854/0xf00 [ 31.319232] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.319753] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.320322] ksys_mmap_pgoff+0x3af/0x500 [ 31.320831] do_syscall_64+0x3f/0x90 [ 31.321314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.321964] RIP: 0033:0x7f952b6d3d82 [ 31.322426] 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 [ 31.324621] RSP: 002b:00007fffe3fb3368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.325549] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f952b6d3d82 [ 31.326429] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f952ab0d000 [ 31.327301] RBP: 00007f952ab0d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.328206] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e9d8d5f70 [ 31.329057] R13: 00007fffe3fb3380 R14: 00007fffe3fb33b0 R15: 00007fffe3fb3710 [ 31.329940] [ 31.330238] [ 31.330458] Allocated by task 213: [ 31.330898] kasan_save_stack+0x22/0x50 [ 31.331410] kasan_set_track+0x25/0x30 [ 31.331951] __kasan_slab_alloc+0x59/0x70 [ 31.332486] kmem_cache_alloc+0x16b/0x370 [ 31.333002] vm_area_dup+0x20/0x160 [ 31.333457] __split_vma+0x170/0x950 [ 31.333937] split_vma+0xc6/0x110 [ 31.334391] mprotect_fixup+0x8d2/0xb30 [ 31.334929] do_mprotect_pkey+0x87e/0xd40 [ 31.335420] __x64_sys_mprotect+0x78/0xc0 [ 31.335934] do_syscall_64+0x3f/0x90 [ 31.336384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.336994] [ 31.337202] Freed by task 213: [ 31.337574] kasan_save_stack+0x22/0x50 [ 31.338056] kasan_set_track+0x25/0x30 [ 31.338525] kasan_save_free_info+0x2b/0x50 [ 31.339025] __kasan_slab_free+0x10a/0x190 [ 31.339536] kmem_cache_free+0x10d/0x4d0 [ 31.340015] rcu_core+0x8c8/0x2860 [ 31.340435] __do_softirq+0x1b7/0x7d4 [ 31.340886] [ 31.341093] Last potentially related work creation: [ 31.341646] kasan_save_stack+0x22/0x50 [ 31.342119] __kasan_record_aux_stack+0x8e/0xa0 [ 31.342665] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.343272] remove_vma+0x139/0x170 [ 31.343725] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.344250] do_vmi_munmap+0x1f1/0x2b0 [ 31.344715] __vm_munmap+0x138/0x3a0 [ 31.345187] __x64_sys_munmap+0x59/0x80 [ 31.345685] do_syscall_64+0x3f/0x90 [ 31.346161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.346826] [ 31.347047] The buggy address belongs to the object at ffff88800eda6910 [ 31.347047] which belongs to the cache vm_area_struct of size 168 [ 31.348564] The buggy address is located 88 bytes inside of [ 31.348564] freed 168-byte region [ffff88800eda6910, ffff88800eda69b8) [ 31.349966] [ 31.350179] The buggy address belongs to the physical page: [ 31.350843] page:00000000e49a9ad8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeda6 [ 31.351921] memcg:ffff88800df08201 [ 31.352344] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.352992] page_type: 0xffffffff() [ 31.353444] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.354358] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df08201 [ 31.355258] page dumped because: kasan: bad access detected [ 31.355954] [ 31.356166] Memory state around the buggy address: [ 31.356746] ffff88800eda6800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.357607] ffff88800eda6880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.358454] >ffff88800eda6900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.359300] ^ [ 31.360083] ffff88800eda6980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.360934] ffff88800eda6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.361766] ================================================================== [ 31.362862] Disabling lock debugging due to kernel taint [ 33.415578] BUG: Bad rss-counter state mm:000000006238a4de type:MM_FILEPAGES val:33 [ 33.416493] BUG: Bad rss-counter state mm:000000006238a4de type:MM_ANONPAGES val:22 [ 33.935852] BUG: Bad rss-counter state mm:00000000401fc7e3 type:MM_FILEPAGES val:33 [ 33.937000] BUG: Bad rss-counter state mm:00000000401fc7e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8937' (ECDSA) to the list of known hosts. 2023/06/21 07:13:20 fuzzer started 2023/06/21 07:13:20 dialing manager at localhost:36067 2023/06/21 07:13:20 checking machine... 2023/06/21 07:13:20 checking revisions... [ 34.621698] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:13:20 testing simple program... [ 34.670201] cgroup: Unknown subsys name 'net' [ 34.707347] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:13:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e305680 RCX=00000000fffffd78 RDX=0000000000000001 RSI=ffff88807ffdc000 RDI=ffff888019629d00 RBP=ffff88806ce09e38 RSP=ffff88806ce09e10 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880087b8780 R13=ffffea000038c100 R14=ffffffff8186b835 R15=ffff888019629d00 RIP=ffffffff81809e3c RFL=00000256 [---ZAP-] 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 00007f9cf1a1b900 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=00007ffe40c17000 CR3=000000000eac4000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f3c354bb018 CR3=000000001653e000 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=2039313a33313a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a33313a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000