syzkaller login: [ 38.661301] BUG: Bad rss-counter state mm:000000008feebb31 type:MM_FILEPAGES val:33 [ 38.662969] BUG: Bad rss-counter state mm:000000008feebb31 type:MM_ANONPAGES val:22 [ 38.825265] ================================================================== [ 38.826251] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.827197] Read of size 8 at addr ffff88800f2a7b38 by task sshd/220 [ 38.828051] [ 38.828365] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.829258] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.830239] Call Trace: [ 38.830557] [ 38.830843] dump_stack_lvl+0x91/0xf0 [ 38.831340] print_report+0xcc/0x620 [ 38.831833] ? __virt_addr_valid+0x102/0x340 [ 38.832401] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.833036] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.833657] kasan_report+0xbe/0xf0 [ 38.834133] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.834763] vma_interval_tree_remove+0xc75/0xec0 [ 38.835360] vma_prepare+0xc54/0x11a0 [ 38.835848] __split_vma+0x5af/0x950 [ 38.836327] ? __pfx___split_vma+0x10/0x10 [ 38.836876] ? find_held_lock+0x2c/0x110 [ 38.837395] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.837962] ? lock_is_held_type+0x9f/0x120 [ 38.838507] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.839124] ? mtree_range_walk+0x632/0x900 [ 38.839679] ? mas_walk+0x5c7/0x7c0 [ 38.840175] do_vmi_munmap+0x1f1/0x2b0 [ 38.840687] mmap_region+0x1f9/0x2660 [ 38.841172] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.841698] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.842435] ? __pfx_lock_acquire+0x10/0x10 [ 38.842976] ? __pfx_mmap_region+0x10/0x10 [ 38.843520] ? security_mmap_addr+0x7d/0xa0 [ 38.844074] ? get_unmapped_area+0x1f5/0x3f0 [ 38.844649] do_mmap+0x854/0xf00 [ 38.845089] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.845601] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.846174] ksys_mmap_pgoff+0x3af/0x500 [ 38.846695] do_syscall_64+0x3f/0x90 [ 38.847181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.847831] RIP: 0033:0x7f66d2bbdd82 [ 38.848304] 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 [ 38.850479] RSP: 002b:00007ffd13715ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.851410] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f66d2bbdd82 [ 38.852257] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f66d1ff7000 [ 38.853116] RBP: 00007f66d1ff7000 R08: 0000000000000009 R09: 0000000000001000 [ 38.853962] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556774076b20 [ 38.854806] R13: 00007ffd13715cc0 R14: 00007ffd13715cf0 R15: 00007ffd13716050 [ 38.855662] [ 38.855956] [ 38.856173] Allocated by task 213: [ 38.856616] kasan_save_stack+0x22/0x50 [ 38.857125] kasan_set_track+0x25/0x30 [ 38.857619] __kasan_slab_alloc+0x59/0x70 [ 38.858147] kmem_cache_alloc+0x16b/0x370 [ 38.858667] vm_area_dup+0x20/0x160 [ 38.859142] __split_vma+0x170/0x950 [ 38.859614] split_vma+0xc6/0x110 [ 38.860055] mprotect_fixup+0x8d2/0xb30 [ 38.860580] do_mprotect_pkey+0x87e/0xd40 [ 38.861106] __x64_sys_mprotect+0x78/0xc0 [ 38.861632] do_syscall_64+0x3f/0x90 [ 38.862113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.862760] [ 38.862978] Freed by task 213: [ 38.863370] kasan_save_stack+0x22/0x50 [ 38.863880] kasan_set_track+0x25/0x30 [ 38.864378] kasan_save_free_info+0x2b/0x50 [ 38.864926] __kasan_slab_free+0x10a/0x190 [ 38.865476] kmem_cache_free+0x10d/0x4d0 [ 38.865997] rcu_core+0x8c8/0x2860 [ 38.866456] __do_softirq+0x1b7/0x7d4 [ 38.866946] [ 38.867166] Last potentially related work creation: [ 38.867755] kasan_save_stack+0x22/0x50 [ 38.868263] __kasan_record_aux_stack+0x8e/0xa0 [ 38.868845] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.869558] remove_vma+0x139/0x170 [ 38.870015] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.870568] do_vmi_munmap+0x1f1/0x2b0 [ 38.871052] __vm_munmap+0x138/0x3a0 [ 38.871519] __x64_sys_munmap+0x59/0x80 [ 38.872017] do_syscall_64+0x3f/0x90 [ 38.872519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.873169] [ 38.873383] The buggy address belongs to the object at ffff88800f2a7ae0 [ 38.873383] which belongs to the cache vm_area_struct of size 168 [ 38.874871] The buggy address is located 88 bytes inside of [ 38.874871] freed 168-byte region [ffff88800f2a7ae0, ffff88800f2a7b88) [ 38.876277] [ 38.876507] The buggy address belongs to the physical page: [ 38.877175] page:000000005f99da02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2a7 [ 38.878261] memcg:ffff88800f502001 [ 38.878698] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.879349] page_type: 0xffffffff() [ 38.879804] raw: 0100000000000200 ffff8880087a0c80 ffffea0000403d40 dead000000000004 [ 38.880743] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f502001 [ 38.881656] page dumped because: kasan: bad access detected [ 38.882333] [ 38.882553] Memory state around the buggy address: [ 38.883146] ffff88800f2a7a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.884008] ffff88800f2a7a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.884883] >ffff88800f2a7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.885743] ^ [ 38.886358] ffff88800f2a7b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 38.887225] ffff88800f2a7c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.888079] ================================================================== [ 38.889029] Disabling lock debugging due to kernel taint [ 40.938749] BUG: Bad rss-counter state mm:00000000c230f052 type:MM_FILEPAGES val:33 [ 40.939580] BUG: Bad rss-counter state mm:00000000c230f052 type:MM_ANONPAGES val:22 [ 41.470849] BUG: Bad rss-counter state mm:0000000016aac033 type:MM_FILEPAGES val:33 [ 41.471404] BUG: Bad rss-counter state mm:0000000016aac033 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57850' (ECDSA) to the list of known hosts. 2023/06/20 15:23:41 fuzzer started 2023/06/20 15:23:41 dialing manager at localhost:36067 2023/06/20 15:23:41 checking machine... 2023/06/20 15:23:41 checking revisions... [ 42.214096] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:23:41 testing simple program... [ 42.267575] cgroup: Unknown subsys name 'net' [ 42.314768] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:23:40 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d86ea RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88800c5f74f0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=0000000000092cc0 RIP=ffffffff8180f0a8 RFL=00000283 [--S---C] 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 00007fdd604d3900 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=000055b40f397160 CR3=000000000f5c2000 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=0000000000000000000055b40f388bb0 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000ffffffff0000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000100 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880140cf101 RSI=ffff8880140cf170 RDI=ffff8880140cf170 RBP=ffff8880140cf130 RSP=ffff8880140cf010 R8 =0000000000000001 R9 =ffff8880140cf118 R10=0000000000038001 R11=0000000000003c0d R12=ffff8880140cf138 R13=ffff8880140cf120 R14=ffff8880140cf170 R15=ffff8880140cf0d8 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f3798ce8900 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=00007f3798ca1008 CR3=000000000e00e000 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