syzkaller login: [ 31.930060] BUG: Bad rss-counter state mm:00000000fd3672f6 type:MM_FILEPAGES val:33 [ 31.931464] BUG: Bad rss-counter state mm:00000000fd3672f6 type:MM_ANONPAGES val:22 [ 32.068463] ================================================================== [ 32.069371] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.070335] Read of size 8 at addr ffff8880180dc310 by task sshd/220 [ 32.071110] [ 32.071333] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.072391] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.073388] Call Trace: [ 32.073722] [ 32.074038] dump_stack_lvl+0x91/0xf0 [ 32.074545] print_report+0xcc/0x620 [ 32.075036] ? __virt_addr_valid+0x102/0x340 [ 32.075592] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.076207] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.076833] kasan_report+0xbe/0xf0 [ 32.077313] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.077951] vma_interval_tree_remove+0xc75/0xec0 [ 32.078570] vma_prepare+0xc54/0x11a0 [ 32.079064] __split_vma+0x5af/0x950 [ 32.079537] ? __pfx___split_vma+0x10/0x10 [ 32.080078] ? find_held_lock+0x2c/0x110 [ 32.080612] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.081190] ? lock_is_held_type+0x9f/0x120 [ 32.081739] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.082366] ? mtree_range_walk+0x632/0x900 [ 32.082929] ? mas_walk+0x5c7/0x7c0 [ 32.083407] do_vmi_munmap+0x1f1/0x2b0 [ 32.083904] mmap_region+0x1f9/0x2660 [ 32.084395] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.084915] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.085643] ? __pfx_lock_acquire+0x10/0x10 [ 32.086202] ? __pfx_mmap_region+0x10/0x10 [ 32.086740] ? security_mmap_addr+0x7d/0xa0 [ 32.087287] ? get_unmapped_area+0x1f5/0x3f0 [ 32.087843] do_mmap+0x854/0xf00 [ 32.088284] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.088783] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.089352] ksys_mmap_pgoff+0x3af/0x500 [ 32.089871] do_syscall_64+0x3f/0x90 [ 32.090348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.090999] RIP: 0033:0x7fdd528ead82 [ 32.091459] 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 [ 32.093574] RSP: 002b:00007ffcc20b82e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.094496] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdd528ead82 [ 32.095344] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdd51d24000 [ 32.096186] RBP: 00007fdd51d24000 R08: 0000000000000009 R09: 0000000000001000 [ 32.097041] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559b3aeb0f70 [ 32.097894] R13: 00007ffcc20b8300 R14: 00007ffcc20b8330 R15: 00007ffcc20b8690 [ 32.098754] [ 32.099052] [ 32.099272] Allocated by task 213: [ 32.099699] kasan_save_stack+0x22/0x50 [ 32.100208] kasan_set_track+0x25/0x30 [ 32.100704] __kasan_slab_alloc+0x59/0x70 [ 32.101237] kmem_cache_alloc+0x16b/0x370 [ 32.101755] vm_area_dup+0x20/0x160 [ 32.102230] __split_vma+0x170/0x950 [ 32.102707] split_vma+0xc6/0x110 [ 32.103151] mprotect_fixup+0x8d2/0xb30 [ 32.103656] do_mprotect_pkey+0x87e/0xd40 [ 32.104180] __x64_sys_mprotect+0x78/0xc0 [ 32.104705] do_syscall_64+0x3f/0x90 [ 32.105179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.105826] [ 32.106054] Freed by task 213: [ 32.106447] kasan_save_stack+0x22/0x50 [ 32.106957] kasan_set_track+0x25/0x30 [ 32.107459] kasan_save_free_info+0x2b/0x50 [ 32.108002] __kasan_slab_free+0x10a/0x190 [ 32.108541] kmem_cache_free+0x10d/0x4d0 [ 32.109054] rcu_core+0x8c8/0x2860 [ 32.109502] __do_softirq+0x1b7/0x7d4 [ 32.110002] [ 32.110216] Last potentially related work creation: [ 32.110803] kasan_save_stack+0x22/0x50 [ 32.111317] __kasan_record_aux_stack+0x8e/0xa0 [ 32.111902] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.112555] remove_vma+0x139/0x170 [ 32.113019] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.113654] do_vmi_munmap+0x1f1/0x2b0 [ 32.114175] __vm_munmap+0x138/0x3a0 [ 32.114655] __x64_sys_munmap+0x59/0x80 [ 32.115161] do_syscall_64+0x3f/0x90 [ 32.115635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.116285] [ 32.116503] The buggy address belongs to the object at ffff8880180dc2b8 [ 32.116503] which belongs to the cache vm_area_struct of size 168 [ 32.118020] The buggy address is located 88 bytes inside of [ 32.118020] freed 168-byte region [ffff8880180dc2b8, ffff8880180dc360) [ 32.119467] [ 32.119690] The buggy address belongs to the physical page: [ 32.120347] page:00000000e9d1f967 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x180dc [ 32.121449] memcg:ffff88800d811b01 [ 32.121887] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.122537] page_type: 0xffffffff() [ 32.122991] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.123918] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d811b01 [ 32.124837] page dumped because: kasan: bad access detected [ 32.125499] [ 32.125715] Memory state around the buggy address: [ 32.126314] ffff8880180dc200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.127170] ffff8880180dc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.128019] >ffff8880180dc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.128872] ^ [ 32.129341] ffff8880180dc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.130208] ffff8880180dc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.131055] ================================================================== [ 32.131967] Disabling lock debugging due to kernel taint [ 34.218552] BUG: Bad rss-counter state mm:000000003c766bd0 type:MM_FILEPAGES val:33 [ 34.219710] BUG: Bad rss-counter state mm:000000003c766bd0 type:MM_ANONPAGES val:22 [ 34.643967] BUG: Bad rss-counter state mm:000000007692a2a3 type:MM_FILEPAGES val:33 [ 34.644705] BUG: Bad rss-counter state mm:000000007692a2a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53130' (ECDSA) to the list of known hosts. 2023/06/19 18:56:36 fuzzer started 2023/06/19 18:56:37 dialing manager at localhost:44161 2023/06/19 18:56:37 checking machine... 2023/06/19 18:56:37 checking revisions... [ 35.308837] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:56:37 testing simple program... [ 35.358541] cgroup: Unknown subsys name 'net' [ 35.400449] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:56:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff11002d84fac RCX=0000000000000000 RDX=1ffffffff0a5883f RSI=ffffffff81718086 RDI=0000000000000007 RBP=0000000018158000 RSP=ffff888016c27d40 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007fff8e2ff000 R13=ffffffff852c41f8 R14=ffff888016eaae40 R15=0000000018158067 RIP=ffffffff817180a4 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f20e221c900 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=00007fff8e2ff000 CR3=000000000ca94000 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=00000000000000000000000000000000 XMM02=000000000000000000000000000000ff XMM03=fc6e83fe4377dc4d742090577b953925 XMM04=fa4ecdf16bcf3a5392b4ea24f7c8c5b7 XMM05=000000000000000000000000000000ff XMM06=fa4e83f143773a4d742090247b953925 XMM07=672065736f6c635f6e6f69737365733a 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f01cd730f80 CR3=000000000f2de000 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=2036333a36353a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a36353a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000