syzkaller login: [ 33.617751] BUG: Bad rss-counter state mm:000000009a036a1f type:MM_FILEPAGES val:33 [ 33.619201] BUG: Bad rss-counter state mm:000000009a036a1f type:MM_ANONPAGES val:22 [ 33.802965] ================================================================== [ 33.804055] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.805252] Read of size 8 at addr ffff88801acf6df0 by task sshd/219 [ 33.806044] [ 33.806263] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.807156] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.808141] Call Trace: [ 33.808480] [ 33.808775] dump_stack_lvl+0x91/0xf0 [ 33.809269] print_report+0xcc/0x620 [ 33.809770] ? __virt_addr_valid+0x102/0x340 [ 33.810349] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.810984] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.811612] kasan_report+0xbe/0xf0 [ 33.812108] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.812763] vma_interval_tree_remove+0xc75/0xec0 [ 33.813395] vma_prepare+0xc54/0x11a0 [ 33.813899] __split_vma+0x5af/0x950 [ 33.814393] ? __pfx___split_vma+0x10/0x10 [ 33.814961] ? find_held_lock+0x2c/0x110 [ 33.815508] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.816097] ? lock_is_held_type+0x9f/0x120 [ 33.816685] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.817319] ? mtree_range_walk+0x632/0x900 [ 33.817892] ? mas_walk+0x5c7/0x7c0 [ 33.818386] do_vmi_munmap+0x1f1/0x2b0 [ 33.818897] mmap_region+0x1f9/0x2660 [ 33.819399] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.819937] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.820690] ? __pfx_lock_acquire+0x10/0x10 [ 33.821246] ? __pfx_mmap_region+0x10/0x10 [ 33.821809] ? security_mmap_addr+0x7d/0xa0 [ 33.822363] ? get_unmapped_area+0x1f5/0x3f0 [ 33.822946] do_mmap+0x854/0xf00 [ 33.823402] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.823909] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.824490] ksys_mmap_pgoff+0x3af/0x500 [ 33.825012] do_syscall_64+0x3f/0x90 [ 33.825486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.826138] RIP: 0033:0x7f8aa1d10d82 [ 33.826596] 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 [ 33.828788] RSP: 002b:00007ffcab86ba78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.829703] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8aa1d10d82 [ 33.830568] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8aa114a000 [ 33.831441] RBP: 00007f8aa114a000 R08: 0000000000000009 R09: 0000000000001000 [ 33.832301] R10: 0000000000000812 R11: 0000000000000206 R12: 00005589b7dd0b20 [ 33.833165] R13: 00007ffcab86ba90 R14: 00007ffcab86bac0 R15: 00007ffcab86be20 [ 33.834037] [ 33.834334] [ 33.834553] Allocated by task 212: [ 33.834990] kasan_save_stack+0x22/0x50 [ 33.835504] kasan_set_track+0x25/0x30 [ 33.836013] __kasan_slab_alloc+0x59/0x70 [ 33.836547] kmem_cache_alloc+0x16b/0x370 [ 33.837074] vm_area_dup+0x20/0x160 [ 33.837532] __split_vma+0x170/0x950 [ 33.837995] split_vma+0xc6/0x110 [ 33.838437] mprotect_fixup+0x8d2/0xb30 [ 33.838945] do_mprotect_pkey+0x87e/0xd40 [ 33.839475] __x64_sys_mprotect+0x78/0xc0 [ 33.840012] do_syscall_64+0x3f/0x90 [ 33.840496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.841139] [ 33.841357] Freed by task 212: [ 33.841753] kasan_save_stack+0x22/0x50 [ 33.842264] kasan_set_track+0x25/0x30 [ 33.842759] kasan_save_free_info+0x2b/0x50 [ 33.843297] __kasan_slab_free+0x10a/0x190 [ 33.843834] kmem_cache_free+0x10d/0x4d0 [ 33.844345] rcu_core+0x8c8/0x2860 [ 33.844816] __do_softirq+0x1b7/0x7d4 [ 33.845311] [ 33.845533] Last potentially related work creation: [ 33.846123] kasan_save_stack+0x22/0x50 [ 33.846631] __kasan_record_aux_stack+0x8e/0xa0 [ 33.847219] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.847875] remove_vma+0x139/0x170 [ 33.848330] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.848917] do_vmi_munmap+0x1f1/0x2b0 [ 33.849412] __vm_munmap+0x138/0x3a0 [ 33.849887] __x64_sys_munmap+0x59/0x80 [ 33.850397] do_syscall_64+0x3f/0x90 [ 33.850875] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.851520] [ 33.851741] The buggy address belongs to the object at ffff88801acf6d98 [ 33.851741] which belongs to the cache vm_area_struct of size 168 [ 33.853228] The buggy address is located 88 bytes inside of [ 33.853228] freed 168-byte region [ffff88801acf6d98, ffff88801acf6e40) [ 33.854648] [ 33.854868] The buggy address belongs to the physical page: [ 33.855534] page:0000000013a65e30 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1acf6 [ 33.856645] memcg:ffff88801582df01 [ 33.857077] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.857727] page_type: 0xffffffff() [ 33.858190] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.859119] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801582df01 [ 33.860031] page dumped because: kasan: bad access detected [ 33.860714] [ 33.860936] Memory state around the buggy address: [ 33.861532] ffff88801acf6c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.862409] ffff88801acf6d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.863268] >ffff88801acf6d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.864137] ^ [ 33.864975] ffff88801acf6e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.865847] ffff88801acf6e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.866711] ================================================================== [ 33.867802] Disabling lock debugging due to kernel taint [ 35.660356] BUG: Bad rss-counter state mm:00000000f0f9956f type:MM_FILEPAGES val:33 [ 35.661506] BUG: Bad rss-counter state mm:00000000f0f9956f type:MM_ANONPAGES val:22 [ 36.050618] BUG: Bad rss-counter state mm:00000000f7857171 type:MM_FILEPAGES val:33 [ 36.051322] BUG: Bad rss-counter state mm:00000000f7857171 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39283' (ECDSA) to the list of known hosts. 2023/06/20 01:22:43 fuzzer started 2023/06/20 01:22:43 dialing manager at localhost:44161 2023/06/20 01:22:43 checking machine... 2023/06/20 01:22:43 checking revisions... [ 36.719829] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:22:44 testing simple program... [ 36.763915] cgroup: Unknown subsys name 'net' [ 36.820539] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:22:38 Registers: info registers vcpu 0 RAX=1ffffffff0bc01ed RBX=ffffffff85e00f6c RCX=ffffffff818470db RDX=0000000000000000 RSI=ffffffff8613dd06 RDI=ffffffff85e00f50 RBP=ffffffff85e00f6c RSP=ffff88806ce099e0 R8 =ffffffff8613dd06 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000021edf R12=ffffffff85e00f6c R13=ffffffff85e00f50 R14=ffffffff85e00f68 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fb0a8431900 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=000055a284104b88 CR3=000000000e6fe000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007fb0a84ed060 RBX=00007ffcd2ac7150 RCX=00007ffcd2ac70f8 RDX=000000000000001b RSI=0000000000000025 RDI=00007fb0a8fd3060 RBP=00007ffcd2ac7280 RSP=00007ffcd2ac7020 R8 =000055a28410b660 R9 =00007ffcd2ac7180 R10=0000000000000025 R11=0000000000000206 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=00007fb0a8fbc9ed RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb0a8431900 00000000 00000000 GS =0000 0000000000000000 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=00007f4b2f9e0170 CR3=000000000e6fe000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000