syzkaller login: [ 36.636501] BUG: Bad rss-counter state mm:000000002eb076cd type:MM_FILEPAGES val:33 [ 36.638122] BUG: Bad rss-counter state mm:000000002eb076cd type:MM_ANONPAGES val:22 [ 36.800747] ================================================================== [ 36.801840] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.802995] Read of size 8 at addr ffff888019d20c20 by task sshd/222 [ 36.803955] [ 36.804172] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.805057] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.806061] Call Trace: [ 36.806391] [ 36.806674] dump_stack_lvl+0x91/0xf0 [ 36.807175] print_report+0xcc/0x620 [ 36.807669] ? __virt_addr_valid+0x102/0x340 [ 36.808236] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.808892] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.809505] kasan_report+0xbe/0xf0 [ 36.809986] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.810620] vma_interval_tree_remove+0xc75/0xec0 [ 36.811249] vma_prepare+0xc54/0x11a0 [ 36.811749] __split_vma+0x5af/0x950 [ 36.812217] ? __pfx___split_vma+0x10/0x10 [ 36.812773] ? find_held_lock+0x2c/0x110 [ 36.813307] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.813885] ? lock_is_held_type+0x9f/0x120 [ 36.814433] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.815034] ? mtree_range_walk+0x632/0x900 [ 36.815594] ? mas_walk+0x5c7/0x7c0 [ 36.816064] do_vmi_munmap+0x1f1/0x2b0 [ 36.816551] mmap_region+0x1f9/0x2660 [ 36.817039] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.817557] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.818295] ? __pfx_lock_acquire+0x10/0x10 [ 36.818835] ? __pfx_mmap_region+0x10/0x10 [ 36.819381] ? security_mmap_addr+0x7d/0xa0 [ 36.819910] ? get_unmapped_area+0x1f5/0x3f0 [ 36.820460] do_mmap+0x854/0xf00 [ 36.820915] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.821426] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.822000] ksys_mmap_pgoff+0x3af/0x500 [ 36.822516] do_syscall_64+0x3f/0x90 [ 36.823018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.823671] RIP: 0033:0x7f56aa492d82 [ 36.824130] 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 [ 36.826288] RSP: 002b:00007ffd8fad65f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.827208] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f56aa492d82 [ 36.828061] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f56a98cc000 [ 36.828919] RBP: 00007f56a98cc000 R08: 0000000000000009 R09: 0000000000001000 [ 36.829773] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b89782ec0 [ 36.830634] R13: 00007ffd8fad6610 R14: 00007ffd8fad6640 R15: 00007ffd8fad69a0 [ 36.831498] [ 36.831789] [ 36.832004] Allocated by task 214: [ 36.832435] kasan_save_stack+0x22/0x50 [ 36.832973] kasan_set_track+0x25/0x30 [ 36.833483] __kasan_slab_alloc+0x59/0x70 [ 36.834004] kmem_cache_alloc+0x16b/0x370 [ 36.834525] vm_area_dup+0x20/0x160 [ 36.834979] __split_vma+0x170/0x950 [ 36.835441] split_vma+0xc6/0x110 [ 36.835878] mprotect_fixup+0x8d2/0xb30 [ 36.836378] do_mprotect_pkey+0x87e/0xd40 [ 36.836924] __x64_sys_mprotect+0x78/0xc0 [ 36.837453] do_syscall_64+0x3f/0x90 [ 36.837933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.838574] [ 36.838788] Freed by task 214: [ 36.839178] kasan_save_stack+0x22/0x50 [ 36.839683] kasan_set_track+0x25/0x30 [ 36.840186] kasan_save_free_info+0x2b/0x50 [ 36.840720] __kasan_slab_free+0x10a/0x190 [ 36.841258] kmem_cache_free+0x10d/0x4d0 [ 36.841767] rcu_core+0x8c8/0x2860 [ 36.842221] __do_softirq+0x1b7/0x7d4 [ 36.842697] [ 36.842909] Last potentially related work creation: [ 36.843511] kasan_save_stack+0x22/0x50 [ 36.844014] __kasan_record_aux_stack+0x8e/0xa0 [ 36.844595] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.845259] remove_vma+0x139/0x170 [ 36.845720] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.846297] do_vmi_munmap+0x1f1/0x2b0 [ 36.846804] __vm_munmap+0x138/0x3a0 [ 36.847290] __x64_sys_munmap+0x59/0x80 [ 36.847810] do_syscall_64+0x3f/0x90 [ 36.848300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.848977] [ 36.849197] The buggy address belongs to the object at ffff888019d20bc8 [ 36.849197] which belongs to the cache vm_area_struct of size 168 [ 36.850731] The buggy address is located 88 bytes inside of [ 36.850731] freed 168-byte region [ffff888019d20bc8, ffff888019d20c70) [ 36.852190] [ 36.852413] The buggy address belongs to the physical page: [ 36.853109] page:0000000064dd316a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d20 [ 36.854250] memcg:ffff88800f24c601 [ 36.854694] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.855369] page_type: 0xffffffff() [ 36.855843] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.856819] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f24c601 [ 36.857769] page dumped because: kasan: bad access detected [ 36.858459] [ 36.858683] Memory state around the buggy address: [ 36.859290] ffff888019d20b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.860187] ffff888019d20b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 36.861091] >ffff888019d20c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 36.861977] ^ [ 36.862524] ffff888019d20c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.863416] ffff888019d20d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.864302] ================================================================== [ 36.865314] Disabling lock debugging due to kernel taint [ 38.619516] BUG: Bad rss-counter state mm:000000007d1096fd type:MM_FILEPAGES val:33 [ 38.620200] BUG: Bad rss-counter state mm:000000007d1096fd type:MM_ANONPAGES val:22 [ 39.002131] BUG: Bad rss-counter state mm:00000000efa34ab4 type:MM_FILEPAGES val:33 [ 39.002851] BUG: Bad rss-counter state mm:00000000efa34ab4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38373' (ECDSA) to the list of known hosts. 2023/06/19 16:37:04 fuzzer started 2023/06/19 16:37:04 dialing manager at localhost:44161 2023/06/19 16:37:04 checking machine... 2023/06/19 16:37:04 checking revisions... [ 39.622917] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:37:04 testing simple program... [ 39.673484] cgroup: Unknown subsys name 'net' [ 39.736747] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:36:58 Registers: info registers vcpu 0 RAX=1ffffffff0bb783c RBX=ffffffff85dbc1e4 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1cc RSP=ffff88800eb6f810 R8 =ffffffff860d68c0 R9 =ffff88800eb6f908 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1fc R13=ffffffff85dbc1cc R14=ffffffff85dbc1cc 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 00007f55d45fd900 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=00007ffc48f3a000 CR3=000000001a1a2000 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=563412feff00545000000000000080fe 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 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=00007f27a3ccb180 CR3=0000000013a9a000 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=741c52c56cc695b17f446750ef4072a9 XMM02=ec2efd57dc4c00df000000000011ce00 XMM03=69e370d55221e0b4000000000011ced0 XMM04=543ae0efb17abdb700000000000ae988 XMM05=35d7025e7c3c088800000000001351c8 XMM06=c291bd5c70af25b90000000000134268 XMM07=e042d86d42eb936e0000000000124a70 XMM08=69e370d55221e0b4000000000011ced0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000