syzkaller login: [ 31.487007] BUG: Bad rss-counter state mm:0000000075877862 type:MM_FILEPAGES val:33 [ 31.488242] BUG: Bad rss-counter state mm:0000000075877862 type:MM_ANONPAGES val:22 [ 31.525017] ================================================================== [ 31.525973] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.526918] Read of size 8 at addr ffff88801a312968 by task sshd/222 [ 31.527695] [ 31.527916] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.528790] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.529797] Call Trace: [ 31.530124] [ 31.530413] dump_stack_lvl+0x91/0xf0 [ 31.530913] print_report+0xcc/0x620 [ 31.531411] ? __virt_addr_valid+0x102/0x340 [ 31.531969] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.532594] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.533230] kasan_report+0xbe/0xf0 [ 31.533759] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.534389] vma_interval_tree_remove+0xc75/0xec0 [ 31.535007] vma_prepare+0xc54/0x11a0 [ 31.535490] __split_vma+0x5af/0x950 [ 31.536097] ? __pfx___split_vma+0x10/0x10 [ 31.536670] ? find_held_lock+0x2c/0x110 [ 31.537212] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.537812] ? lock_is_held_type+0x9f/0x120 [ 31.538388] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.539004] ? mtree_range_walk+0x632/0x900 [ 31.539571] ? mas_walk+0x5c7/0x7c0 [ 31.540055] do_vmi_munmap+0x1f1/0x2b0 [ 31.540562] mmap_region+0x1f9/0x2660 [ 31.541051] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.541586] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.542335] ? __pfx_lock_acquire+0x10/0x10 [ 31.542879] ? __pfx_mmap_region+0x10/0x10 [ 31.543418] ? security_mmap_addr+0x7d/0xa0 [ 31.543954] ? get_unmapped_area+0x1f5/0x3f0 [ 31.544530] do_mmap+0x854/0xf00 [ 31.544976] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.545494] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.546101] ksys_mmap_pgoff+0x3af/0x500 [ 31.546627] do_syscall_64+0x3f/0x90 [ 31.547113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.547776] RIP: 0033:0x7f1aa083fd82 [ 31.548244] 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 [ 31.550484] RSP: 002b:00007fffa5be42b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.551422] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1aa083fd82 [ 31.552320] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1a9fc79000 [ 31.553187] RBP: 00007f1a9fc79000 R08: 0000000000000009 R09: 0000000000001000 [ 31.554097] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e72b39eec0 [ 31.554982] R13: 00007fffa5be42d0 R14: 00007fffa5be4300 R15: 00007fffa5be4660 [ 31.555883] [ 31.556193] [ 31.556417] Allocated by task 214: [ 31.556862] kasan_save_stack+0x22/0x50 [ 31.557383] kasan_set_track+0x25/0x30 [ 31.557893] __kasan_slab_alloc+0x59/0x70 [ 31.558439] kmem_cache_alloc+0x16b/0x370 [ 31.558967] vm_area_dup+0x20/0x160 [ 31.559439] __split_vma+0x170/0x950 [ 31.559912] split_vma+0xc6/0x110 [ 31.560371] mprotect_fixup+0x8d2/0xb30 [ 31.560891] do_mprotect_pkey+0x87e/0xd40 [ 31.561441] __x64_sys_mprotect+0x78/0xc0 [ 31.561995] do_syscall_64+0x3f/0x90 [ 31.562499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.563153] [ 31.563371] Freed by task 214: [ 31.563780] kasan_save_stack+0x22/0x50 [ 31.564309] kasan_set_track+0x25/0x30 [ 31.564826] kasan_save_free_info+0x2b/0x50 [ 31.565380] __kasan_slab_free+0x10a/0x190 [ 31.565957] kmem_cache_free+0x10d/0x4d0 [ 31.566476] rcu_core+0x8c8/0x2860 [ 31.566942] __do_softirq+0x1b7/0x7d4 [ 31.567434] [ 31.567655] Last potentially related work creation: [ 31.568261] kasan_save_stack+0x22/0x50 [ 31.568783] __kasan_record_aux_stack+0x8e/0xa0 [ 31.569358] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.570039] remove_vma+0x139/0x170 [ 31.570502] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.571078] do_vmi_munmap+0x1f1/0x2b0 [ 31.571595] __vm_munmap+0x138/0x3a0 [ 31.572076] __x64_sys_munmap+0x59/0x80 [ 31.572593] do_syscall_64+0x3f/0x90 [ 31.573077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.573757] [ 31.573983] The buggy address belongs to the object at ffff88801a312910 [ 31.573983] which belongs to the cache vm_area_struct of size 168 [ 31.575517] The buggy address is located 88 bytes inside of [ 31.575517] freed 168-byte region [ffff88801a312910, ffff88801a3129b8) [ 31.576999] [ 31.577219] The buggy address belongs to the physical page: [ 31.577926] page:00000000de7ff031 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a312 [ 31.579053] memcg:ffff88801a0ae001 [ 31.579508] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.580193] page_type: 0xffffffff() [ 31.580659] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.581616] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0ae001 [ 31.582587] page dumped because: kasan: bad access detected [ 31.583255] [ 31.583484] Memory state around the buggy address: [ 31.584082] ffff88801a312800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.584987] ffff88801a312880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.585890] >ffff88801a312900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.586788] ^ [ 31.587589] ffff88801a312980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.588468] ffff88801a312a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.589337] ================================================================== [ 31.590524] Disabling lock debugging due to kernel taint [ 33.543220] BUG: Bad rss-counter state mm:0000000019e3746d type:MM_FILEPAGES val:33 [ 33.544201] BUG: Bad rss-counter state mm:0000000019e3746d type:MM_ANONPAGES val:22 [ 34.128393] BUG: Bad rss-counter state mm:00000000c203aff0 type:MM_FILEPAGES val:33 [ 34.129516] BUG: Bad rss-counter state mm:00000000c203aff0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29684' (ECDSA) to the list of known hosts. 2023/06/19 18:40:07 fuzzer started 2023/06/19 18:40:07 dialing manager at localhost:44161 2023/06/19 18:40:07 checking machine... 2023/06/19 18:40:07 checking revisions... [ 34.796801] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:40:08 testing simple program... [ 34.846857] cgroup: Unknown subsys name 'net' [ 34.889590] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:40:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c136d RSI=ffffffff84531da7 RDI=ffff88806ce09b68 RBP=0000000000000006 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff8880146b3680 R15=ffff88800d37b080 RIP=ffffffff813ad46e RFL=00000212 [----A--] 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 00007eff7bf49900 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=00007eff7b3a9ed0 CR3=000000000c7d6000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b340ad2d33e7d64100000000000ae988 XMM05=8d66caceabd052590000000000136058 XMM06=59d5b690e0af863b0000000000134f10 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff813ad6d0 RBX=ffff888008e57958 RCX=ffff888008e579f8 RDX=1ffff110011caf36 RSI=ffff888008e579f0 RDI=ffffffff813ad6d0 RBP=ffff888008e579b0 RSP=ffff888008e57940 R8 =0000000000000001 R9 =ffff888008e57998 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008e57a20 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff88800e471700 RIP=ffffffff811303b8 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 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=00007ffc8a3be000 CR3=000000001a3f2000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000