syzkaller login: [ 28.884511] BUG: Bad rss-counter state mm:0000000095be54ab type:MM_FILEPAGES val:33 [ 28.885876] BUG: Bad rss-counter state mm:0000000095be54ab type:MM_ANONPAGES val:22 [ 28.927536] ================================================================== [ 28.928473] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.929425] Read of size 8 at addr ffff88800f0dcc20 by task sshd/219 [ 28.930202] [ 28.930426] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.931297] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.932298] Call Trace: [ 28.932640] [ 28.932930] dump_stack_lvl+0x91/0xf0 [ 28.933431] print_report+0xcc/0x620 [ 28.933916] ? __virt_addr_valid+0x102/0x340 [ 28.934469] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.935085] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.935701] kasan_report+0xbe/0xf0 [ 28.936177] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.936821] vma_interval_tree_remove+0xc75/0xec0 [ 28.937432] vma_prepare+0xc54/0x11a0 [ 28.937912] __split_vma+0x5af/0x950 [ 28.938384] ? __pfx___split_vma+0x10/0x10 [ 28.938917] ? find_held_lock+0x2c/0x110 [ 28.939437] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.940003] ? lock_is_held_type+0x9f/0x120 [ 28.940556] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.941161] ? mtree_range_walk+0x632/0x900 [ 28.941715] ? mas_walk+0x5c7/0x7c0 [ 28.942193] do_vmi_munmap+0x1f1/0x2b0 [ 28.942691] mmap_region+0x1f9/0x2660 [ 28.943176] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.943695] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.944416] ? __pfx_lock_acquire+0x10/0x10 [ 28.944982] ? __pfx_mmap_region+0x10/0x10 [ 28.945514] ? security_mmap_addr+0x7d/0xa0 [ 28.946047] ? get_unmapped_area+0x1f5/0x3f0 [ 28.946599] do_mmap+0x854/0xf00 [ 28.947039] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.947545] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.948114] ksys_mmap_pgoff+0x3af/0x500 [ 28.948639] do_syscall_64+0x3f/0x90 [ 28.949120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.949771] RIP: 0033:0x7f5b42957d82 [ 28.950229] 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 [ 28.952368] RSP: 002b:00007ffcfbd9c708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.953295] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b42957d82 [ 28.954147] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b41d91000 [ 28.954992] RBP: 00007f5b41d91000 R08: 0000000000000009 R09: 0000000000001000 [ 28.955844] R10: 0000000000000812 R11: 0000000000000206 R12: 000056225cd4fd90 [ 28.956713] R13: 00007ffcfbd9c720 R14: 00007ffcfbd9c750 R15: 00007ffcfbd9cab0 [ 28.957574] [ 28.957867] [ 28.958087] Allocated by task 212: [ 28.958527] kasan_save_stack+0x22/0x50 [ 28.959041] kasan_set_track+0x25/0x30 [ 28.959532] __kasan_slab_alloc+0x59/0x70 [ 28.960058] kmem_cache_alloc+0x16b/0x370 [ 28.960587] vm_area_dup+0x20/0x160 [ 28.961043] __split_vma+0x170/0x950 [ 28.961512] split_vma+0xc6/0x110 [ 28.961954] mprotect_fixup+0x8d2/0xb30 [ 28.962455] do_mprotect_pkey+0x87e/0xd40 [ 28.962981] __x64_sys_mprotect+0x78/0xc0 [ 28.963504] do_syscall_64+0x3f/0x90 [ 28.963983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.964654] [ 28.964872] Freed by task 212: [ 28.965272] kasan_save_stack+0x22/0x50 [ 28.965777] kasan_set_track+0x25/0x30 [ 28.966272] kasan_save_free_info+0x2b/0x50 [ 28.966806] __kasan_slab_free+0x10a/0x190 [ 28.967345] kmem_cache_free+0x10d/0x4d0 [ 28.967868] rcu_core+0x8c8/0x2860 [ 28.968326] __do_softirq+0x1b7/0x7d4 [ 28.968815] [ 28.969037] Last potentially related work creation: [ 28.969625] kasan_save_stack+0x22/0x50 [ 28.970137] __kasan_record_aux_stack+0x8e/0xa0 [ 28.970722] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.971375] remove_vma+0x139/0x170 [ 28.971830] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.972394] do_vmi_munmap+0x1f1/0x2b0 [ 28.972903] __vm_munmap+0x138/0x3a0 [ 28.973378] __x64_sys_munmap+0x59/0x80 [ 28.973882] do_syscall_64+0x3f/0x90 [ 28.974357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.975000] [ 28.975220] Second to last potentially related work creation: [ 28.975914] kasan_save_stack+0x22/0x50 [ 28.976429] __kasan_record_aux_stack+0x8e/0xa0 [ 28.977017] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.977674] remove_vma+0x139/0x170 [ 28.978128] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.978691] do_vmi_munmap+0x1f1/0x2b0 [ 28.979178] mmap_region+0x1f9/0x2660 [ 28.979674] do_mmap+0x854/0xf00 [ 28.980110] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.980614] ksys_mmap_pgoff+0x7d/0x500 [ 28.981114] do_syscall_64+0x3f/0x90 [ 28.981590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.982248] [ 28.982467] The buggy address belongs to the object at ffff88800f0dcbc8 [ 28.982467] which belongs to the cache vm_area_struct of size 168 [ 28.983967] The buggy address is located 88 bytes inside of [ 28.983967] freed 168-byte region [ffff88800f0dcbc8, ffff88800f0dcc70) [ 28.985407] [ 28.985628] The buggy address belongs to the physical page: [ 28.986302] page:00000000749300af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0dc [ 28.987402] memcg:ffff88800bb08f01 [ 28.987833] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.988496] page_type: 0xffffffff() [ 28.988959] raw: 0100000000000200 ffff8880087a0c80 ffffea0000326900 dead000000000004 [ 28.989904] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bb08f01 [ 28.990827] page dumped because: kasan: bad access detected [ 28.991496] [ 28.991714] Memory state around the buggy address: [ 28.992294] ffff88800f0dcb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.993179] ffff88800f0dcb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.994051] >ffff88800f0dcc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.994918] ^ [ 28.995454] ffff88800f0dcc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.996327] ffff88800f0dcd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.997193] ================================================================== [ 28.998598] Disabling lock debugging due to kernel taint [ 31.403480] BUG: Bad rss-counter state mm:00000000608affd4 type:MM_FILEPAGES val:33 [ 31.404521] BUG: Bad rss-counter state mm:00000000608affd4 type:MM_ANONPAGES val:22 [ 31.871115] BUG: Bad rss-counter state mm:0000000094e76b34 type:MM_FILEPAGES val:33 [ 31.871893] BUG: Bad rss-counter state mm:0000000094e76b34 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62473' (ECDSA) to the list of known hosts. 2023/06/20 20:06:06 fuzzer started 2023/06/20 20:06:06 dialing manager at localhost:36067 2023/06/20 20:06:06 checking machine... 2023/06/20 20:06:06 checking revisions... [ 32.574591] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:06:06 testing simple program... [ 32.621276] cgroup: Unknown subsys name 'net' [ 32.667212] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:06:06 Registers: info registers vcpu 0 RAX=ffffed100d9c1320 RBX=1ffff1100d9c1320 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88806ce098f0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ebf RFL=00000282 [--S----] 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=00007ffc4fe8e5f8 CR3=000000000e748000 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=2036303a36303a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a36303a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000000c RCX=ffffffff8217bb9c RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=00007ffd7b1468a4 RSP=ffff88801801fae0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88801801fbb8 R13=0000000000000000 R14=ffff88801801fbb8 R15=00007ffd7b1468a4 RIP=ffffffff814c0249 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 00007faed8eb4900 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=00007ffd7b143000 CR3=000000001cc0e000 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=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