syzkaller login: [ 34.191056] BUG: Bad rss-counter state mm:000000002336bc8a type:MM_FILEPAGES val:33 [ 34.192246] BUG: Bad rss-counter state mm:000000002336bc8a type:MM_ANONPAGES val:22 [ 34.343166] ================================================================== [ 34.344235] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.345450] Read of size 8 at addr ffff88800f76c880 by task sshd/222 [ 34.346367] [ 34.346618] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.347634] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.348756] Call Trace: [ 34.349126] [ 34.349460] dump_stack_lvl+0x91/0xf0 [ 34.350030] print_report+0xcc/0x620 [ 34.350604] ? __virt_addr_valid+0x102/0x340 [ 34.351249] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.351954] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.352684] kasan_report+0xbe/0xf0 [ 34.353254] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.353990] vma_interval_tree_remove+0xc75/0xec0 [ 34.354716] vma_prepare+0xc54/0x11a0 [ 34.355293] __split_vma+0x5af/0x950 [ 34.355854] ? __pfx___split_vma+0x10/0x10 [ 34.356500] ? find_held_lock+0x2c/0x110 [ 34.357119] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.357797] ? lock_is_held_type+0x9f/0x120 [ 34.358461] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.359194] ? mtree_range_walk+0x632/0x900 [ 34.359859] ? mas_walk+0x5c7/0x7c0 [ 34.360426] do_vmi_munmap+0x1f1/0x2b0 [ 34.361007] mmap_region+0x1f9/0x2660 [ 34.361579] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.362184] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.363044] ? __pfx_lock_acquire+0x10/0x10 [ 34.363693] ? __pfx_mmap_region+0x10/0x10 [ 34.364330] ? security_mmap_addr+0x7d/0xa0 [ 34.364964] ? get_unmapped_area+0x1f5/0x3f0 [ 34.365612] do_mmap+0x854/0xf00 [ 34.366143] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.366735] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.367407] ksys_mmap_pgoff+0x3af/0x500 [ 34.368027] do_syscall_64+0x3f/0x90 [ 34.368587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.369352] RIP: 0033:0x7f9aac3f5d82 [ 34.369896] 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 [ 34.372466] RSP: 002b:00007ffe8601d0c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.373555] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9aac3f5d82 [ 34.374578] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9aab82f000 [ 34.375588] RBP: 00007f9aab82f000 R08: 0000000000000009 R09: 0000000000001000 [ 34.376610] R10: 0000000000000812 R11: 0000000000000206 R12: 00005594a976fec0 [ 34.377609] R13: 00007ffe8601d0e0 R14: 00007ffe8601d110 R15: 00007ffe8601d470 [ 34.378650] [ 34.378997] [ 34.379248] Allocated by task 215: [ 34.379764] kasan_save_stack+0x22/0x50 [ 34.380383] kasan_set_track+0x25/0x30 [ 34.380975] __kasan_slab_alloc+0x59/0x70 [ 34.381592] kmem_cache_alloc+0x16b/0x370 [ 34.382208] vm_area_dup+0x20/0x160 [ 34.382745] __split_vma+0x170/0x950 [ 34.383292] split_vma+0xc6/0x110 [ 34.383803] mprotect_fixup+0x8d2/0xb30 [ 34.384397] do_mprotect_pkey+0x87e/0xd40 [ 34.385007] __x64_sys_mprotect+0x78/0xc0 [ 34.385619] do_syscall_64+0x3f/0x90 [ 34.386262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.387028] [ 34.387283] Freed by task 215: [ 34.387741] kasan_save_stack+0x22/0x50 [ 34.388339] kasan_set_track+0x25/0x30 [ 34.388921] kasan_save_free_info+0x2b/0x50 [ 34.389556] __kasan_slab_free+0x10a/0x190 [ 34.390181] kmem_cache_free+0x10d/0x4d0 [ 34.390796] rcu_core+0x8c8/0x2860 [ 34.391323] __do_softirq+0x1b7/0x7d4 [ 34.391887] [ 34.392144] Last potentially related work creation: [ 34.392841] kasan_save_stack+0x22/0x50 [ 34.393435] __kasan_record_aux_stack+0x8e/0xa0 [ 34.394112] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.394886] remove_vma+0x139/0x170 [ 34.395419] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.396078] do_vmi_munmap+0x1f1/0x2b0 [ 34.396649] __vm_munmap+0x138/0x3a0 [ 34.397204] __x64_sys_munmap+0x59/0x80 [ 34.397799] do_syscall_64+0x3f/0x90 [ 34.398371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.399122] [ 34.399376] The buggy address belongs to the object at ffff88800f76c828 [ 34.399376] which belongs to the cache vm_area_struct of size 168 [ 34.401106] The buggy address is located 88 bytes inside of [ 34.401106] freed 168-byte region [ffff88800f76c828, ffff88800f76c8d0) [ 34.402766] [ 34.403021] The buggy address belongs to the physical page: [ 34.403793] page:00000000b202c603 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf76c [ 34.405077] memcg:ffff88800e73a901 [ 34.405585] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.406367] page_type: 0xffffffff() [ 34.406889] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.407974] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e73a901 [ 34.409027] page dumped because: kasan: bad access detected [ 34.409801] [ 34.410052] Memory state around the buggy address: [ 34.410746] ffff88800f76c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 34.411739] ffff88800f76c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.412736] >ffff88800f76c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.413734] ^ [ 34.414226] ffff88800f76c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.415240] ffff88800f76c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 34.416236] ================================================================== [ 34.417327] Disabling lock debugging due to kernel taint [ 36.426186] BUG: Bad rss-counter state mm:0000000090be5279 type:MM_FILEPAGES val:33 [ 36.427392] BUG: Bad rss-counter state mm:0000000090be5279 type:MM_ANONPAGES val:22 [ 36.871877] BUG: Bad rss-counter state mm:00000000bd64bb94 type:MM_FILEPAGES val:33 [ 36.873226] BUG: Bad rss-counter state mm:00000000bd64bb94 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25457' (ECDSA) to the list of known hosts. 2023/06/19 21:23:29 fuzzer started 2023/06/19 21:23:29 dialing manager at localhost:44161 2023/06/19 21:23:29 checking machine... 2023/06/19 21:23:29 checking revisions... [ 37.588241] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:23:29 testing simple program... [ 37.631082] cgroup: Unknown subsys name 'net' [ 37.671009] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:23:26 Registers: info registers vcpu 0 RAX=ffffffff864b4f3d RBX=0000000000000002 RCX=ffffffff864b4f38 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff864b4f3c R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff81130abf 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 00007f7cfcb3b900 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=00007f7cfd0f30b0 CR3=000000000e694000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000088 RCX=0000000000000000 RDX=1ffff1100d9e6c39 RSI=1ffff1100d9e6c3e RDI=ffff88806cf361f0 RBP=ffff88806cf361a0 RSP=ffff8880103375e8 R8 =ffff88806cf361c8 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000200 R13=ffff88800d960d00 R14=0000000000400cd0 R15=0000000000000001 RIP=ffffffff8183a2a5 RFL=00000046 [---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 00007f8e6a452900 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=00007f8e69972008 CR3=000000000d57c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6fc201a43a67283b00000000000ae988 XMM05=8156cc13479c83ef0000000000134d18 XMM06=00c3ffa147b8d8570000000000133b08 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000