syzkaller login: [ 30.645139] BUG: Bad rss-counter state mm:00000000bd09c4ce type:MM_FILEPAGES val:33 [ 30.646321] BUG: Bad rss-counter state mm:00000000bd09c4ce type:MM_ANONPAGES val:22 [ 30.825737] ================================================================== [ 30.826817] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.827914] Read of size 8 at addr ffff88801a324a50 by task sshd/221 [ 30.828977] [ 30.829226] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.830081] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.831043] Call Trace: [ 30.831364] [ 30.831650] dump_stack_lvl+0x91/0xf0 [ 30.832134] print_report+0xcc/0x620 [ 30.832628] ? __virt_addr_valid+0x102/0x340 [ 30.833180] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.833788] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.834398] kasan_report+0xbe/0xf0 [ 30.834867] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.835479] vma_interval_tree_remove+0xc75/0xec0 [ 30.836075] vma_prepare+0xc54/0x11a0 [ 30.836556] __split_vma+0x5af/0x950 [ 30.837025] ? __pfx___split_vma+0x10/0x10 [ 30.837551] ? find_held_lock+0x2c/0x110 [ 30.838064] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.838623] ? lock_is_held_type+0x9f/0x120 [ 30.839156] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.839751] ? mtree_range_walk+0x632/0x900 [ 30.840319] ? mas_walk+0x5c7/0x7c0 [ 30.840787] do_vmi_munmap+0x1f1/0x2b0 [ 30.841278] mmap_region+0x1f9/0x2660 [ 30.841756] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.842261] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.842963] ? __pfx_lock_acquire+0x10/0x10 [ 30.843489] ? __pfx_mmap_region+0x10/0x10 [ 30.844011] ? security_mmap_addr+0x7d/0xa0 [ 30.844550] ? get_unmapped_area+0x1f5/0x3f0 [ 30.845089] do_mmap+0x854/0xf00 [ 30.845521] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.846010] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.846565] ksys_mmap_pgoff+0x3af/0x500 [ 30.847065] do_syscall_64+0x3f/0x90 [ 30.847540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.848176] RIP: 0033:0x7fdb01ee5d82 [ 30.848652] 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 [ 30.850752] RSP: 002b:00007ffc93b6c288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.851649] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb01ee5d82 [ 30.852494] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb0131f000 [ 30.853336] RBP: 00007fdb0131f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.854171] R10: 0000000000000812 R11: 0000000000000206 R12: 00005581105e7f70 [ 30.855015] R13: 00007ffc93b6c2a0 R14: 00007ffc93b6c2d0 R15: 00007ffc93b6c630 [ 30.855875] [ 30.856164] [ 30.856385] Allocated by task 212: [ 30.856809] kasan_save_stack+0x22/0x50 [ 30.857306] kasan_set_track+0x25/0x30 [ 30.857793] __kasan_slab_alloc+0x59/0x70 [ 30.858312] kmem_cache_alloc+0x16b/0x370 [ 30.858823] vm_area_dup+0x20/0x160 [ 30.859268] __split_vma+0x170/0x950 [ 30.859728] split_vma+0xc6/0x110 [ 30.860162] mprotect_fixup+0x8d2/0xb30 [ 30.860679] do_mprotect_pkey+0x87e/0xd40 [ 30.861191] __x64_sys_mprotect+0x78/0xc0 [ 30.861708] do_syscall_64+0x3f/0x90 [ 30.862180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.862813] [ 30.863027] Freed by task 212: [ 30.863430] kasan_save_stack+0x22/0x50 [ 30.863937] kasan_set_track+0x25/0x30 [ 30.864438] kasan_save_free_info+0x2b/0x50 [ 30.864964] __kasan_slab_free+0x10a/0x190 [ 30.865494] kmem_cache_free+0x10d/0x4d0 [ 30.866004] rcu_core+0x8c8/0x2860 [ 30.866449] __do_softirq+0x1b7/0x7d4 [ 30.866919] [ 30.867136] Last potentially related work creation: [ 30.867716] kasan_save_stack+0x22/0x50 [ 30.868223] __kasan_record_aux_stack+0x8e/0xa0 [ 30.868818] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.869459] remove_vma+0x139/0x170 [ 30.869968] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.870527] do_vmi_munmap+0x1f1/0x2b0 [ 30.871010] __vm_munmap+0x138/0x3a0 [ 30.871474] __x64_sys_munmap+0x59/0x80 [ 30.871970] do_syscall_64+0x3f/0x90 [ 30.872455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.873096] [ 30.873310] The buggy address belongs to the object at ffff88801a3249f8 [ 30.873310] which belongs to the cache vm_area_struct of size 168 [ 30.874755] The buggy address is located 88 bytes inside of [ 30.874755] freed 168-byte region [ffff88801a3249f8, ffff88801a324aa0) [ 30.876156] [ 30.876377] The buggy address belongs to the physical page: [ 30.877028] page:00000000a30ed447 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a324 [ 30.878116] memcg:ffff88801a369d01 [ 30.878543] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.879179] page_type: 0xffffffff() [ 30.879628] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.880573] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a369d01 [ 30.881472] page dumped because: kasan: bad access detected [ 30.882127] [ 30.882345] Memory state around the buggy address: [ 30.882930] ffff88801a324900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.883786] ffff88801a324980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.884638] >ffff88801a324a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.885482] ^ [ 30.886171] ffff88801a324a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.887008] ffff88801a324b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.887856] ================================================================== [ 30.888778] Disabling lock debugging due to kernel taint [ 32.936300] BUG: Bad rss-counter state mm:000000007eff1d18 type:MM_FILEPAGES val:33 [ 32.937440] BUG: Bad rss-counter state mm:000000007eff1d18 type:MM_ANONPAGES val:22 [ 33.361333] BUG: Bad rss-counter state mm:00000000fb8cebbb type:MM_FILEPAGES val:33 [ 33.362464] BUG: Bad rss-counter state mm:00000000fb8cebbb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13597' (ECDSA) to the list of known hosts. 2023/06/21 07:41:24 fuzzer started 2023/06/21 07:41:24 dialing manager at localhost:36067 2023/06/21 07:41:24 checking machine... 2023/06/21 07:41:24 checking revisions... [ 34.084543] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:41:24 testing simple program... [ 34.131611] cgroup: Unknown subsys name 'net' [ 34.171752] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:41:24 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff1100d9c1329 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806ce09938 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f20 RFL=00000247 [---Z-PC] 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=00007f2441ecf020 CR3=0000000016cbc000 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=2033323a31343a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a31343a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00000000ffffffff RCX=0000000000000000 RDX=ffff88800ff151c0 RSI=0000000000000004 RDI=ffffffff85d3d350 RBP=ffff88800f339000 RSP=ffff888016ea7840 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000a2000000a20 R12=ffff88800f339080 R13=ffff88800f339580 R14=ffff88800f339579 R15=ffff88800f339600 RIP=ffffffff8386b8af 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 00007f25a60ab900 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=00007ffdacbe3000 CR3=000000000ca64000 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