syzkaller login: [ 33.143030] BUG: Bad rss-counter state mm:00000000060f95d2 type:MM_FILEPAGES val:33 [ 33.144669] BUG: Bad rss-counter state mm:00000000060f95d2 type:MM_ANONPAGES val:22 [ 33.316601] ================================================================== [ 33.317505] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.318446] Read of size 8 at addr ffff88800c9814e0 by task sshd/219 [ 33.319217] [ 33.319531] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.320402] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.321400] Call Trace: [ 33.321740] <TASK> [ 33.322034] dump_stack_lvl+0x91/0xf0 [ 33.322543] print_report+0xcc/0x620 [ 33.323026] ? __virt_addr_valid+0x102/0x340 [ 33.323588] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.324208] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.324824] kasan_report+0xbe/0xf0 [ 33.325317] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.325940] vma_interval_tree_remove+0xc75/0xec0 [ 33.326548] vma_prepare+0xc54/0x11a0 [ 33.327029] __split_vma+0x5af/0x950 [ 33.327506] ? __pfx___split_vma+0x10/0x10 [ 33.328038] ? find_held_lock+0x2c/0x110 [ 33.328556] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.329125] ? lock_is_held_type+0x9f/0x120 [ 33.329678] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.330297] ? mtree_range_walk+0x632/0x900 [ 33.330856] ? mas_walk+0x5c7/0x7c0 [ 33.331337] do_vmi_munmap+0x1f1/0x2b0 [ 33.331840] mmap_region+0x1f9/0x2660 [ 33.332323] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.332848] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.333604] ? __pfx_lock_acquire+0x10/0x10 [ 33.334160] ? __pfx_mmap_region+0x10/0x10 [ 33.334695] ? security_mmap_addr+0x7d/0xa0 [ 33.335232] ? get_unmapped_area+0x1f5/0x3f0 [ 33.335802] do_mmap+0x854/0xf00 [ 33.336247] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.336755] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.337342] ksys_mmap_pgoff+0x3af/0x500 [ 33.337846] do_syscall_64+0x3f/0x90 [ 33.338332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.338996] RIP: 0033:0x7f15fd052d82 [ 33.339458] 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 [ 33.341653] RSP: 002b:00007ffe50560af8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.342588] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f15fd052d82 [ 33.343460] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f15fc48c000 [ 33.344335] RBP: 00007f15fc48c000 R08: 0000000000000009 R09: 0000000000001000 [ 33.345208] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ab6abd3980 [ 33.346070] R13: 00007ffe50560b10 R14: 00007ffe50560b40 R15: 00007ffe50560ea0 [ 33.346934] </TASK> [ 33.347233] [ 33.347450] Allocated by task 212: [ 33.347890] kasan_save_stack+0x22/0x50 [ 33.348410] kasan_set_track+0x25/0x30 [ 33.348940] __kasan_slab_alloc+0x59/0x70 [ 33.349510] kmem_cache_alloc+0x16b/0x370 [ 33.350062] vm_area_dup+0x20/0x160 [ 33.350540] __split_vma+0x170/0x950 [ 33.351025] split_vma+0xc6/0x110 [ 33.351486] mprotect_fixup+0x8d2/0xb30 [ 33.352017] do_mprotect_pkey+0x87e/0xd40 [ 33.352567] __x64_sys_mprotect+0x78/0xc0 [ 33.353115] do_syscall_64+0x3f/0x90 [ 33.353629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.354301] [ 33.354534] Freed by task 203: [ 33.354946] kasan_save_stack+0x22/0x50 [ 33.355479] kasan_set_track+0x25/0x30 [ 33.356001] kasan_save_free_info+0x2b/0x50 [ 33.356565] __kasan_slab_free+0x10a/0x190 [ 33.357125] kmem_cache_free+0x10d/0x4d0 [ 33.357672] rcu_core+0x8c8/0x2860 [ 33.358136] __do_softirq+0x1b7/0x7d4 [ 33.358642] [ 33.358870] Last potentially related work creation: [ 33.359487] kasan_save_stack+0x22/0x50 [ 33.360019] __kasan_record_aux_stack+0x8e/0xa0 [ 33.360619] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.361307] remove_vma+0x139/0x170 [ 33.361787] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.362378] do_vmi_munmap+0x1f1/0x2b0 [ 33.362886] __vm_munmap+0x138/0x3a0 [ 33.363377] __x64_sys_munmap+0x59/0x80 [ 33.363898] do_syscall_64+0x3f/0x90 [ 33.364394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.365071] [ 33.365317] The buggy address belongs to the object at ffff88800c981488 [ 33.365317] which belongs to the cache vm_area_struct of size 168 [ 33.366879] The buggy address is located 88 bytes inside of [ 33.366879] freed 168-byte region [ffff88800c981488, ffff88800c981530) [ 33.368373] [ 33.368598] The buggy address belongs to the physical page: [ 33.369306] page:00000000517b77fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc981 [ 33.370454] memcg:ffff888009768001 [ 33.370904] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.371594] page_type: 0xffffffff() [ 33.372079] raw: 0100000000000200 ffff88800879fc80 ffffea0000333c00 dead000000000006 [ 33.373050] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009768001 [ 33.374038] page dumped because: kasan: bad access detected [ 33.374745] [ 33.374976] Memory state around the buggy address: [ 33.375589] ffff88800c981380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.376504] ffff88800c981400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.377420] >ffff88800c981480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.378318] ^ [ 33.379130] ffff88800c981500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 33.380045] ffff88800c981580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.380968] ================================================================== [ 33.382023] Disabling lock debugging due to kernel taint [ 35.175729] BUG: Bad rss-counter state mm:000000008a642fcb type:MM_FILEPAGES val:33 [ 35.176668] BUG: Bad rss-counter state mm:000000008a642fcb type:MM_ANONPAGES val:22 [ 35.689708] BUG: Bad rss-counter state mm:000000000b545bdb type:MM_FILEPAGES val:33 [ 35.690685] BUG: Bad rss-counter state mm:000000000b545bdb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53881' (ECDSA) to the list of known hosts. 2023/06/20 06:21:55 fuzzer started 2023/06/20 06:21:55 dialing manager at localhost:44161 2023/06/20 06:21:55 checking machine... 2023/06/20 06:21:55 checking revisions... [ 36.462737] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:21:55 testing simple program... [ 36.510242] cgroup: Unknown subsys name 'net' [ 36.550420] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:21:50 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff88801682b680 RSI=ffffffff814c84fa RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880183079c8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff888016f03ab0 RIP=ffffffff814c07f1 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 00007f0d27b10900 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=00007f0d280c80b0 CR3=000000001a38a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=0000000000000001 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=00007f9c07e34018 CR3=000000000cb1c000 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=428b70bb2bb61e809f49932647c8a1ca XMM02=000000000011d4f8ec2efd57dc4c00df XMM03=00000000001236a852b8d9b73f2ffc90 XMM04=54dffd3c609810ed00000000000ae988 XMM05=19e9129bd510f23500000000001339d0 XMM06=8aee4589f28d29010000000000132838 XMM07=e042d86d42eb936e0000000000123928 XMM08=52b8d9b73f2ffc90000000000011d558 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000