syzkaller login: [ 30.869141] BUG: Bad rss-counter state mm:00000000cdd27505 type:MM_FILEPAGES val:33 [ 30.870787] BUG: Bad rss-counter state mm:00000000cdd27505 type:MM_ANONPAGES val:22 [ 31.049156] ================================================================== [ 31.050245] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.051474] Read of size 8 at addr ffff88800e0c45c8 by task sshd/218 [ 31.052402] [ 31.052662] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.053711] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.054723] Call Trace: [ 31.055044] [ 31.055326] dump_stack_lvl+0x91/0xf0 [ 31.055816] print_report+0xcc/0x620 [ 31.056299] ? __virt_addr_valid+0x102/0x340 [ 31.056850] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.057468] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.058072] kasan_report+0xbe/0xf0 [ 31.058544] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.059168] vma_interval_tree_remove+0xc75/0xec0 [ 31.059769] vma_prepare+0xc54/0x11a0 [ 31.060248] __split_vma+0x5af/0x950 [ 31.060726] ? __pfx___split_vma+0x10/0x10 [ 31.061258] ? find_held_lock+0x2c/0x110 [ 31.061801] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.062360] ? lock_is_held_type+0x9f/0x120 [ 31.062898] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.063502] ? mtree_range_walk+0x632/0x900 [ 31.064059] ? mas_walk+0x5c7/0x7c0 [ 31.064537] do_vmi_munmap+0x1f1/0x2b0 [ 31.065030] mmap_region+0x1f9/0x2660 [ 31.065535] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.066044] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.066762] ? __pfx_lock_acquire+0x10/0x10 [ 31.067292] ? __pfx_mmap_region+0x10/0x10 [ 31.067859] ? security_mmap_addr+0x7d/0xa0 [ 31.068420] ? get_unmapped_area+0x1f5/0x3f0 [ 31.068979] do_mmap+0x854/0xf00 [ 31.069428] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.069932] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.070508] ksys_mmap_pgoff+0x3af/0x500 [ 31.071018] do_syscall_64+0x3f/0x90 [ 31.071504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.072158] RIP: 0033:0x7f495554ad82 [ 31.072616] 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 [ 31.074795] RSP: 002b:00007ffe26832818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.075705] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f495554ad82 [ 31.076558] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4954984000 [ 31.077419] RBP: 00007f4954984000 R08: 0000000000000009 R09: 0000000000001000 [ 31.078271] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ba2e1fbec0 [ 31.079128] R13: 00007ffe26832830 R14: 00007ffe26832860 R15: 00007ffe26832bc0 [ 31.079964] [ 31.080254] [ 31.080465] Allocated by task 211: [ 31.080886] kasan_save_stack+0x22/0x50 [ 31.081395] kasan_set_track+0x25/0x30 [ 31.081911] __kasan_slab_alloc+0x59/0x70 [ 31.082432] kmem_cache_alloc+0x16b/0x370 [ 31.082943] vm_area_dup+0x20/0x160 [ 31.083391] __split_vma+0x170/0x950 [ 31.083856] split_vma+0xc6/0x110 [ 31.084288] mprotect_fixup+0x8d2/0xb30 [ 31.084782] do_mprotect_pkey+0x87e/0xd40 [ 31.085301] __x64_sys_mprotect+0x78/0xc0 [ 31.085820] do_syscall_64+0x3f/0x90 [ 31.086294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.086929] [ 31.087141] Freed by task 211: [ 31.087538] kasan_save_stack+0x22/0x50 [ 31.088045] kasan_set_track+0x25/0x30 [ 31.088535] kasan_save_free_info+0x2b/0x50 [ 31.089064] __kasan_slab_free+0x10a/0x190 [ 31.089617] kmem_cache_free+0x10d/0x4d0 [ 31.090129] rcu_core+0x8c8/0x2860 [ 31.090572] __do_softirq+0x1b7/0x7d4 [ 31.091070] [ 31.091282] Last potentially related work creation: [ 31.091827] kasan_save_stack+0x22/0x50 [ 31.092332] __kasan_record_aux_stack+0x8e/0xa0 [ 31.093031] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.093683] remove_vma+0x139/0x170 [ 31.094129] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.094681] do_vmi_munmap+0x1f1/0x2b0 [ 31.095163] __vm_munmap+0x138/0x3a0 [ 31.095629] __x64_sys_munmap+0x59/0x80 [ 31.096137] do_syscall_64+0x3f/0x90 [ 31.096632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.097274] [ 31.097498] The buggy address belongs to the object at ffff88800e0c4570 [ 31.097498] which belongs to the cache vm_area_struct of size 168 [ 31.099428] The buggy address is located 88 bytes inside of [ 31.099428] freed 168-byte region [ffff88800e0c4570, ffff88800e0c4618) [ 31.101484] [ 31.101782] The buggy address belongs to the physical page: [ 31.102864] page:00000000d564078d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0c4 [ 31.104327] memcg:ffff88800e3a1601 [ 31.104910] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.105857] page_type: 0xffffffff() [ 31.106468] raw: 0100000000000200 ffff8880087a0c80 ffffea0000328ac0 dead000000000004 [ 31.107688] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3a1601 [ 31.108927] page dumped because: kasan: bad access detected [ 31.109804] [ 31.110095] Memory state around the buggy address: [ 31.110874] ffff88800e0c4480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.112055] ffff88800e0c4500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.113232] >ffff88800e0c4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.114384] ^ [ 31.115265] ffff88800e0c4600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.116439] ffff88800e0c4680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.117597] ================================================================== [ 31.118975] Disabling lock debugging due to kernel taint [ 33.708816] BUG: Bad rss-counter state mm:0000000003afd249 type:MM_FILEPAGES val:33 [ 33.710310] BUG: Bad rss-counter state mm:0000000003afd249 type:MM_ANONPAGES val:22 [ 34.217259] BUG: Bad rss-counter state mm:0000000020aef69a type:MM_FILEPAGES val:33 [ 34.218323] BUG: Bad rss-counter state mm:0000000020aef69a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38330' (ECDSA) to the list of known hosts. 2023/06/21 00:09:46 fuzzer started 2023/06/21 00:09:46 dialing manager at localhost:36067 2023/06/21 00:09:46 checking machine... 2023/06/21 00:09:46 checking revisions... [ 34.967171] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:09:46 testing simple program... [ 35.021299] cgroup: Unknown subsys name 'net' [ 35.071369] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:09:46 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8562be48 RBP=ffff88806ce28140 RSP=ffff88806ce09e88 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806ce09ff8 R12=00000007f0d10040 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff812d8e70 RFL=00000046 [---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 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=00007fb0bc171000 CR3=000000000c514000 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=39303a3030203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3732325b646873732035343a3930 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383830 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=000000000000000b RCX=ffffffff81895284 RDX=000000000000000b RSI=0000000000000000 RDI=0000000000000005 RBP=00007f4e419bd15e RSP=ffff88801678fd60 R8 =0000000000000005 R9 =0000000000000000 R10=000000000000000b R11=0000000000000000 R12=ffff8880183aa200 R13=0000000000000000 R14=000000000000000b R15=ffffffff85d3e300 RIP=ffffffff814c0250 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 00007f4e419c7900 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=00007f4e41f7f0b0 CR3=000000000f6b6000 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=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