syzkaller login: [ 30.823876] BUG: Bad rss-counter state mm:00000000e2dc7906 type:MM_FILEPAGES val:33 [ 30.824884] BUG: Bad rss-counter state mm:00000000e2dc7906 type:MM_ANONPAGES val:22 [ 30.988012] ================================================================== [ 30.988954] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.989938] Read of size 8 at addr ffff888016793ed8 by task sshd/221 [ 30.990869] [ 30.991103] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.992011] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.993085] Call Trace: [ 30.993421] [ 30.993726] dump_stack_lvl+0x91/0xf0 [ 30.994246] print_report+0xcc/0x620 [ 30.994770] ? __virt_addr_valid+0x102/0x340 [ 30.995357] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.996001] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.996655] kasan_report+0xbe/0xf0 [ 30.997158] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.997814] vma_interval_tree_remove+0xc75/0xec0 [ 30.998476] vma_prepare+0xc54/0x11a0 [ 30.998982] __split_vma+0x5af/0x950 [ 30.999488] ? __pfx___split_vma+0x10/0x10 [ 31.000054] ? find_held_lock+0x2c/0x110 [ 31.000610] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.001203] ? lock_is_held_type+0x9f/0x120 [ 31.001773] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.002410] ? mtree_range_walk+0x632/0x900 [ 31.003000] ? mas_walk+0x5c7/0x7c0 [ 31.003501] do_vmi_munmap+0x1f1/0x2b0 [ 31.004016] mmap_region+0x1f9/0x2660 [ 31.004524] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.005064] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.005825] ? __pfx_lock_acquire+0x10/0x10 [ 31.006390] ? __pfx_mmap_region+0x10/0x10 [ 31.006976] ? security_mmap_addr+0x7d/0xa0 [ 31.007530] ? get_unmapped_area+0x1f5/0x3f0 [ 31.008108] do_mmap+0x854/0xf00 [ 31.008575] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.009105] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.009691] ksys_mmap_pgoff+0x3af/0x500 [ 31.010237] do_syscall_64+0x3f/0x90 [ 31.010747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.011427] RIP: 0033:0x7fc25ba92d82 [ 31.011902] 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 [ 31.014155] RSP: 002b:00007ffca04f7728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.015127] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc25ba92d82 [ 31.016030] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc25aecc000 [ 31.016931] RBP: 00007fc25aecc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.017823] R10: 0000000000000812 R11: 0000000000000206 R12: 00005640af20bf60 [ 31.018719] R13: 00007ffca04f7740 R14: 00007ffca04f7770 R15: 00007ffca04f7ad0 [ 31.019631] [ 31.019939] [ 31.020167] Allocated by task 214: [ 31.020611] kasan_save_stack+0x22/0x50 [ 31.021141] kasan_set_track+0x25/0x30 [ 31.021660] __kasan_slab_alloc+0x59/0x70 [ 31.022213] kmem_cache_alloc+0x16b/0x370 [ 31.022774] vm_area_dup+0x20/0x160 [ 31.023251] __split_vma+0x170/0x950 [ 31.023753] split_vma+0xc6/0x110 [ 31.024213] mprotect_fixup+0x8d2/0xb30 [ 31.024737] do_mprotect_pkey+0x87e/0xd40 [ 31.025285] __x64_sys_mprotect+0x78/0xc0 [ 31.025837] do_syscall_64+0x3f/0x90 [ 31.026346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.027022] [ 31.027245] Freed by task 19: [ 31.027646] kasan_save_stack+0x22/0x50 [ 31.028193] kasan_set_track+0x25/0x30 [ 31.028714] kasan_save_free_info+0x2b/0x50 [ 31.029268] __kasan_slab_free+0x10a/0x190 [ 31.029836] kmem_cache_free+0x10d/0x4d0 [ 31.030369] rcu_core+0x8c8/0x2860 [ 31.030864] __do_softirq+0x1b7/0x7d4 [ 31.031368] [ 31.031597] Last potentially related work creation: [ 31.032210] kasan_save_stack+0x22/0x50 [ 31.032736] __kasan_record_aux_stack+0x8e/0xa0 [ 31.033344] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.034027] remove_vma+0x139/0x170 [ 31.034514] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.035107] do_vmi_munmap+0x1f1/0x2b0 [ 31.035624] __vm_munmap+0x138/0x3a0 [ 31.036112] __x64_sys_munmap+0x59/0x80 [ 31.036643] do_syscall_64+0x3f/0x90 [ 31.037146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.037817] [ 31.038037] The buggy address belongs to the object at ffff888016793e80 [ 31.038037] which belongs to the cache vm_area_struct of size 168 [ 31.039631] The buggy address is located 88 bytes inside of [ 31.039631] freed 168-byte region [ffff888016793e80, ffff888016793f28) [ 31.041126] [ 31.041352] The buggy address belongs to the physical page: [ 31.042056] page:00000000e28e391c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16793 [ 31.043220] memcg:ffff88801597c001 [ 31.043658] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.044342] page_type: 0xffffffff() [ 31.044830] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.045798] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801597c001 [ 31.046786] page dumped because: kasan: bad access detected [ 31.047495] [ 31.047716] Memory state around the buggy address: [ 31.048336] ffff888016793d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.049259] ffff888016793e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.050173] >ffff888016793e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.051095] ^ [ 31.051877] ffff888016793f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.052780] ffff888016793f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.053702] ================================================================== [ 31.054723] Disabling lock debugging due to kernel taint [ 33.100129] BUG: Bad rss-counter state mm:0000000064b028d2 type:MM_FILEPAGES val:33 [ 33.101336] BUG: Bad rss-counter state mm:0000000064b028d2 type:MM_ANONPAGES val:22 [ 33.540454] BUG: Bad rss-counter state mm:000000008290e8f0 type:MM_FILEPAGES val:33 [ 33.541602] BUG: Bad rss-counter state mm:000000008290e8f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55654' (ECDSA) to the list of known hosts. 2023/06/20 23:07:26 fuzzer started 2023/06/20 23:07:26 dialing manager at localhost:36067 2023/06/20 23:07:26 checking machine... 2023/06/20 23:07:26 checking revisions... [ 34.302680] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:07:26 testing simple program... [ 34.350569] cgroup: Unknown subsys name 'net' [ 34.417809] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:07:26 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800982c850 RCX=ffff88800982c850 RDX=00000000000d000d RSI=ffff88800982c850 RDI=ffff88800844f780 RBP=ffff888016cdf7f8 RSP=ffff888016cdf760 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea0000260b00 R11=00000000800d000b R12=ffffea0000260b00 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff81809672 RFL=00000246 [---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 00007f796e6ed900 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=00007f796eca2650 CR3=0000000016d5e000 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=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=00007ff84e2a6590 CR3=000000000ef70000 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=b8e4453393937eb7034383bc28abd0c2 XMM02=eff9b2d0a8fce9cb000000000011d130 XMM03=2c67c8bc2e329bc3000000000011d258 XMM04=acd8018dead7407500000000000ae988 XMM05=f36bb4082a6ef2e30000000000132828 XMM06=e4cb8bb95a7664b600000000001316c0 XMM07=fb795ef6d657705600000000001218e8 XMM08=2c67c8bc2e329bc3000000000011d258 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000