syzkaller login: [ 40.754124] BUG: Bad rss-counter state mm:00000000732716b5 type:MM_FILEPAGES val:33 [ 40.754725] BUG: Bad rss-counter state mm:00000000732716b5 type:MM_ANONPAGES val:22 [ 40.892575] ================================================================== [ 40.893726] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.894733] Read of size 8 at addr ffff88800f8d8d08 by task sshd/220 [ 40.895587] [ 40.895803] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.896657] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.897623] Call Trace: [ 40.897939] [ 40.898220] dump_stack_lvl+0x91/0xf0 [ 40.898714] print_report+0xcc/0x620 [ 40.899192] ? __virt_addr_valid+0x102/0x340 [ 40.899745] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.900365] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.900995] kasan_report+0xbe/0xf0 [ 40.901488] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.902115] vma_interval_tree_remove+0xc75/0xec0 [ 40.902711] vma_prepare+0xc54/0x11a0 [ 40.903187] __split_vma+0x5af/0x950 [ 40.903658] ? __pfx___split_vma+0x10/0x10 [ 40.904189] ? find_held_lock+0x2c/0x110 [ 40.904703] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.905267] ? lock_is_held_type+0x9f/0x120 [ 40.905827] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.906426] ? mtree_range_walk+0x632/0x900 [ 40.906968] ? mas_walk+0x5c7/0x7c0 [ 40.907439] do_vmi_munmap+0x1f1/0x2b0 [ 40.907926] mmap_region+0x1f9/0x2660 [ 40.908410] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.908916] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.909630] ? __pfx_lock_acquire+0x10/0x10 [ 40.910155] ? __pfx_mmap_region+0x10/0x10 [ 40.910683] ? security_mmap_addr+0x7d/0xa0 [ 40.911204] ? get_unmapped_area+0x1f5/0x3f0 [ 40.911748] do_mmap+0x854/0xf00 [ 40.912180] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.912667] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.913220] ksys_mmap_pgoff+0x3af/0x500 [ 40.913724] do_syscall_64+0x3f/0x90 [ 40.914196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.914828] RIP: 0033:0x7f71a4612d82 [ 40.915277] 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 [ 40.917355] RSP: 002b:00007ffdbb206db8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.918307] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f71a4612d82 [ 40.919141] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f71a3a4c000 [ 40.919977] RBP: 00007f71a3a4c000 R08: 0000000000000009 R09: 0000000000001000 [ 40.920813] R10: 0000000000000812 R11: 0000000000000206 R12: 00005618cda7bec0 [ 40.921656] R13: 00007ffdbb206dd0 R14: 00007ffdbb206e00 R15: 00007ffdbb207160 [ 40.922502] [ 40.922791] [ 40.923004] Allocated by task 213: [ 40.923428] kasan_save_stack+0x22/0x50 [ 40.923929] kasan_set_track+0x25/0x30 [ 40.924418] __kasan_slab_alloc+0x59/0x70 [ 40.924936] kmem_cache_alloc+0x16b/0x370 [ 40.925443] vm_area_dup+0x20/0x160 [ 40.925902] __split_vma+0x170/0x950 [ 40.926364] split_vma+0xc6/0x110 [ 40.926800] mprotect_fixup+0x8d2/0xb30 [ 40.927295] do_mprotect_pkey+0x87e/0xd40 [ 40.927807] __x64_sys_mprotect+0x78/0xc0 [ 40.928325] do_syscall_64+0x3f/0x90 [ 40.928795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.929448] [ 40.929701] Freed by task 19: [ 40.930087] kasan_save_stack+0x22/0x50 [ 40.930583] kasan_set_track+0x25/0x30 [ 40.931069] kasan_save_free_info+0x2b/0x50 [ 40.931598] __kasan_slab_free+0x10a/0x190 [ 40.932124] kmem_cache_free+0x10d/0x4d0 [ 40.932628] rcu_core+0x8c8/0x2860 [ 40.933067] __do_softirq+0x1b7/0x7d4 [ 40.933550] [ 40.933762] Last potentially related work creation: [ 40.934349] kasan_save_stack+0x22/0x50 [ 40.934850] __kasan_record_aux_stack+0x8e/0xa0 [ 40.935449] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.936112] remove_vma+0x139/0x170 [ 40.936585] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.937172] do_vmi_munmap+0x1f1/0x2b0 [ 40.937689] __vm_munmap+0x138/0x3a0 [ 40.938170] __x64_sys_munmap+0x59/0x80 [ 40.938687] do_syscall_64+0x3f/0x90 [ 40.939175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.939811] [ 40.940024] The buggy address belongs to the object at ffff88800f8d8cb0 [ 40.940024] which belongs to the cache vm_area_struct of size 168 [ 40.941481] The buggy address is located 88 bytes inside of [ 40.941481] freed 168-byte region [ffff88800f8d8cb0, ffff88800f8d8d58) [ 40.942872] [ 40.943096] The buggy address belongs to the physical page: [ 40.943755] page:00000000cb690f76 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf8d8 [ 40.944833] memcg:ffff8880165c3301 [ 40.945259] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.945918] page_type: 0xffffffff() [ 40.946377] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.947303] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165c3301 [ 40.948269] page dumped because: kasan: bad access detected [ 40.948974] [ 40.949199] Memory state around the buggy address: [ 40.949837] ffff88800f8d8c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 40.950750] ffff88800f8d8c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 40.951658] >ffff88800f8d8d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 40.952567] ^ [ 40.953032] ffff88800f8d8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 40.953946] ffff88800f8d8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 40.954847] ================================================================== [ 40.955858] Disabling lock debugging due to kernel taint [ 42.461878] BUG: Bad rss-counter state mm:0000000020061e83 type:MM_FILEPAGES val:33 [ 42.462404] BUG: Bad rss-counter state mm:0000000020061e83 type:MM_ANONPAGES val:22 [ 42.915063] BUG: Bad rss-counter state mm:00000000d5062c17 type:MM_FILEPAGES val:33 [ 42.916133] BUG: Bad rss-counter state mm:00000000d5062c17 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41729' (ECDSA) to the list of known hosts. 2023/06/19 12:27:28 fuzzer started 2023/06/19 12:27:29 dialing manager at localhost:44161 2023/06/19 12:27:29 checking machine... 2023/06/19 12:27:29 checking revisions... [ 43.637175] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:27:29 testing simple program... [ 43.686459] cgroup: Unknown subsys name 'net' [ 43.749419] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:27:17 Registers: info registers vcpu 0 RAX=1ffffffff0bcbe6f RBX=ffffffff85e5f37c RCX=ffffffff81f05e03 RDX=0000000000000000 RSI=ffffffff861cb336 RDI=ffffffff85e5f370 RBP=ffffffff85e5f370 RSP=ffff88800ecff870 R8 =ffffffff861cb336 R9 =ffff88800ecff968 R10=0000000000038001 R11=00000000000397e7 R12=ffffffff85e5f388 R13=ffffffff85e5f370 R14=ffffffff85e5f370 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 00007f6bdecff900 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=00007ffc76261000 CR3=000000000c74c000 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=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=00007fd0523b9080 CR3=000000001853e000 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=2038323a37323a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a37323a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000