syzkaller login: [ 30.171543] BUG: Bad rss-counter state mm:000000001de63fcf type:MM_FILEPAGES val:33 [ 30.172954] BUG: Bad rss-counter state mm:000000001de63fcf type:MM_ANONPAGES val:22 [ 30.316008] ================================================================== [ 30.317094] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.318247] Read of size 8 at addr ffff888015c04b38 by task sshd/219 [ 30.319341] [ 30.319617] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.320701] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.321923] Call Trace: [ 30.322243] [ 30.322527] dump_stack_lvl+0x91/0xf0 [ 30.323016] print_report+0xcc/0x620 [ 30.323493] ? __virt_addr_valid+0x102/0x340 [ 30.324049] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.324655] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.325269] kasan_report+0xbe/0xf0 [ 30.325747] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.326371] vma_interval_tree_remove+0xc75/0xec0 [ 30.326978] vma_prepare+0xc54/0x11a0 [ 30.327451] __split_vma+0x5af/0x950 [ 30.327936] ? __pfx___split_vma+0x10/0x10 [ 30.328463] ? find_held_lock+0x2c/0x110 [ 30.328986] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.329559] ? lock_is_held_type+0x9f/0x120 [ 30.330104] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.330702] ? mtree_range_walk+0x632/0x900 [ 30.331257] ? mas_walk+0x5c7/0x7c0 [ 30.331728] do_vmi_munmap+0x1f1/0x2b0 [ 30.332234] mmap_region+0x1f9/0x2660 [ 30.332728] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.333242] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.333952] ? __pfx_lock_acquire+0x10/0x10 [ 30.334479] ? __pfx_mmap_region+0x10/0x10 [ 30.335009] ? security_mmap_addr+0x7d/0xa0 [ 30.335538] ? get_unmapped_area+0x1f5/0x3f0 [ 30.336103] do_mmap+0x854/0xf00 [ 30.336542] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.337044] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.337602] ksys_mmap_pgoff+0x3af/0x500 [ 30.338110] do_syscall_64+0x3f/0x90 [ 30.338591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.339229] RIP: 0033:0x7fcc2ebb4d82 [ 30.339685] 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 [ 30.341806] RSP: 002b:00007ffc84263548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.342698] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc2ebb4d82 [ 30.343545] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc2dfee000 [ 30.344401] RBP: 00007fcc2dfee000 R08: 0000000000000009 R09: 0000000000001000 [ 30.345245] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cde0f97d90 [ 30.346082] R13: 00007ffc84263560 R14: 00007ffc84263590 R15: 00007ffc842638f0 [ 30.346930] [ 30.347220] [ 30.347436] Allocated by task 212: [ 30.347880] kasan_save_stack+0x22/0x50 [ 30.348382] kasan_set_track+0x25/0x30 [ 30.348876] __kasan_slab_alloc+0x59/0x70 [ 30.349404] kmem_cache_alloc+0x16b/0x370 [ 30.349922] vm_area_dup+0x20/0x160 [ 30.350387] __split_vma+0x170/0x950 [ 30.350850] split_vma+0xc6/0x110 [ 30.351287] mprotect_fixup+0x8d2/0xb30 [ 30.351800] do_mprotect_pkey+0x87e/0xd40 [ 30.352326] __x64_sys_mprotect+0x78/0xc0 [ 30.352854] do_syscall_64+0x3f/0x90 [ 30.353333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.353975] [ 30.354186] Freed by task 212: [ 30.354583] kasan_save_stack+0x22/0x50 [ 30.355093] kasan_set_track+0x25/0x30 [ 30.355581] kasan_save_free_info+0x2b/0x50 [ 30.356128] __kasan_slab_free+0x10a/0x190 [ 30.356653] kmem_cache_free+0x10d/0x4d0 [ 30.357157] rcu_core+0x8c8/0x2860 [ 30.357606] __do_softirq+0x1b7/0x7d4 [ 30.358092] [ 30.358304] Last potentially related work creation: [ 30.358876] kasan_save_stack+0x22/0x50 [ 30.359375] __kasan_record_aux_stack+0x8e/0xa0 [ 30.359967] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.360608] remove_vma+0x139/0x170 [ 30.361125] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.361675] do_vmi_munmap+0x1f1/0x2b0 [ 30.362160] __vm_munmap+0x138/0x3a0 [ 30.362623] __x64_sys_munmap+0x59/0x80 [ 30.363120] do_syscall_64+0x3f/0x90 [ 30.363599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.364255] [ 30.364467] The buggy address belongs to the object at ffff888015c04ae0 [ 30.364467] which belongs to the cache vm_area_struct of size 168 [ 30.365914] The buggy address is located 88 bytes inside of [ 30.365914] freed 168-byte region [ffff888015c04ae0, ffff888015c04b88) [ 30.367295] [ 30.367512] The buggy address belongs to the physical page: [ 30.368171] page:00000000d277b77e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c04 [ 30.369259] memcg:ffff88800f26fa01 [ 30.369685] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.370325] page_type: 0xffffffff() [ 30.370776] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.371685] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f26fa01 [ 30.372607] page dumped because: kasan: bad access detected [ 30.373282] [ 30.373496] Memory state around the buggy address: [ 30.374073] ffff888015c04a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.374924] ffff888015c04a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.375776] >ffff888015c04b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.376635] ^ [ 30.377247] ffff888015c04b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.378098] ffff888015c04c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.378945] ================================================================== [ 30.379928] Disabling lock debugging due to kernel taint [ 32.987077] BUG: Bad rss-counter state mm:0000000068ecff6e type:MM_FILEPAGES val:33 [ 32.988414] BUG: Bad rss-counter state mm:0000000068ecff6e type:MM_ANONPAGES val:22 [ 33.403887] BUG: Bad rss-counter state mm:000000007b806e43 type:MM_FILEPAGES val:33 [ 33.404466] BUG: Bad rss-counter state mm:000000007b806e43 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48799' (ECDSA) to the list of known hosts. 2023/06/21 05:01:15 fuzzer started 2023/06/21 05:01:16 dialing manager at localhost:36067 2023/06/21 05:01:16 checking machine... 2023/06/21 05:01:16 checking revisions... [ 34.075043] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:01:16 testing simple program... [ 34.126929] cgroup: Unknown subsys name 'net' [ 34.178476] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:01:15 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888016d80000 RCX=ffff888016d80000 RDX=0000000000070007 RSI=ffff888016d80000 RDI=ffff8880087b83c0 RBP=ffff8880199a7908 RSP=ffff8880199a7870 R8 =0000000080070006 R9 =0000000000000000 R10=ffffea00005b6000 R11=000000008080002c R12=ffffea00005b6000 R13=0000000000000000 R14=0000000000070006 R15=ffff8880087b83c0 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 00007fdf01c56700 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=00007f85cf129330 CR3=0000000019922000 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=2035313a31303a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a31303a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000014 RCX=0000000000000000 RDX=ffff888016c7b680 RSI=ffffffff83695e32 RDI=0000000000000006 RBP=0000000000000014 RSP=ffff88800fb778b8 R8 =0000000000000006 R9 =ffff88800c7f0ec0 R10=ffff888004800000 R11=0000000000000000 R12=ffff88800c7f0ec0 R13=ffff88800fb77e70 R14=ffff88800fb77e70 R15=ffff88800fdc5c80 RIP=ffffffff814c0880 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 00007f1d6a252900 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=00007ffc87ae9000 CR3=000000001ca32000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000