syzkaller login: [ 30.248257] BUG: Bad rss-counter state mm:000000004868ba13 type:MM_FILEPAGES val:33 [ 30.249661] BUG: Bad rss-counter state mm:000000004868ba13 type:MM_ANONPAGES val:22 [ 30.285905] ================================================================== [ 30.286896] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.287792] Read of size 8 at addr ffff88801a88da50 by task sshd/221 [ 30.288502] [ 30.288709] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.289662] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.290567] Call Trace: [ 30.290870] [ 30.291182] dump_stack_lvl+0x91/0xf0 [ 30.291649] print_report+0xcc/0x620 [ 30.292105] ? __virt_addr_valid+0x102/0x340 [ 30.292638] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.293218] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.293807] kasan_report+0xbe/0xf0 [ 30.294261] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.294860] vma_interval_tree_remove+0xc75/0xec0 [ 30.295463] vma_prepare+0xc54/0x11a0 [ 30.295931] __split_vma+0x5af/0x950 [ 30.296402] ? __pfx___split_vma+0x10/0x10 [ 30.296912] ? find_held_lock+0x2c/0x110 [ 30.297421] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.297966] ? lock_is_held_type+0x9f/0x120 [ 30.298489] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.299084] ? mtree_range_walk+0x632/0x900 [ 30.299634] ? mas_walk+0x5c7/0x7c0 [ 30.300094] do_vmi_munmap+0x1f1/0x2b0 [ 30.300577] mmap_region+0x1f9/0x2660 [ 30.301049] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.301552] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.302247] ? __pfx_lock_acquire+0x10/0x10 [ 30.302781] ? __pfx_mmap_region+0x10/0x10 [ 30.303317] ? security_mmap_addr+0x7d/0xa0 [ 30.303830] ? get_unmapped_area+0x1f5/0x3f0 [ 30.304366] do_mmap+0x854/0xf00 [ 30.304791] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.305275] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.305819] ksys_mmap_pgoff+0x3af/0x500 [ 30.306322] do_syscall_64+0x3f/0x90 [ 30.306799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.307432] RIP: 0033:0x7f89744edd82 [ 30.307867] 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 [ 30.309952] RSP: 002b:00007ffe44e9ab58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.310830] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f89744edd82 [ 30.311659] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8973927000 [ 30.312488] RBP: 00007f8973927000 R08: 0000000000000009 R09: 0000000000001000 [ 30.313310] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560bfe0d5ec0 [ 30.314125] R13: 00007ffe44e9ab70 R14: 00007ffe44e9aba0 R15: 00007ffe44e9af00 [ 30.314957] [ 30.315257] [ 30.315470] Allocated by task 214: [ 30.315884] kasan_save_stack+0x22/0x50 [ 30.316371] kasan_set_track+0x25/0x30 [ 30.316855] __kasan_slab_alloc+0x59/0x70 [ 30.317378] kmem_cache_alloc+0x16b/0x370 [ 30.317879] vm_area_dup+0x20/0x160 [ 30.318322] __split_vma+0x170/0x950 [ 30.318782] split_vma+0xc6/0x110 [ 30.319227] mprotect_fixup+0x8d2/0xb30 [ 30.319718] do_mprotect_pkey+0x87e/0xd40 [ 30.320235] __x64_sys_mprotect+0x78/0xc0 [ 30.320741] do_syscall_64+0x3f/0x90 [ 30.321217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.321839] [ 30.322051] Freed by task 204: [ 30.322432] kasan_save_stack+0x22/0x50 [ 30.322915] kasan_set_track+0x25/0x30 [ 30.323400] kasan_save_free_info+0x2b/0x50 [ 30.323921] __kasan_slab_free+0x10a/0x190 [ 30.324438] kmem_cache_free+0x10d/0x4d0 [ 30.324939] rcu_core+0x8c8/0x2860 [ 30.325371] __do_softirq+0x1b7/0x7d4 [ 30.325835] [ 30.326053] Last potentially related work creation: [ 30.326633] kasan_save_stack+0x22/0x50 [ 30.327126] __kasan_record_aux_stack+0x8e/0xa0 [ 30.327727] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.328355] remove_vma+0x139/0x170 [ 30.328801] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.329351] do_vmi_munmap+0x1f1/0x2b0 [ 30.329832] __vm_munmap+0x138/0x3a0 [ 30.330284] __x64_sys_munmap+0x59/0x80 [ 30.330770] do_syscall_64+0x3f/0x90 [ 30.331248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.331864] [ 30.332079] The buggy address belongs to the object at ffff88801a88d9f8 [ 30.332079] which belongs to the cache vm_area_struct of size 168 [ 30.333514] The buggy address is located 88 bytes inside of [ 30.333514] freed 168-byte region [ffff88801a88d9f8, ffff88801a88daa0) [ 30.334879] [ 30.335090] The buggy address belongs to the physical page: [ 30.335725] page:000000001afc7feb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a88d [ 30.336777] memcg:ffff88800fc74601 [ 30.337186] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.337806] page_type: 0xffffffff() [ 30.338244] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.339172] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc74601 [ 30.340122] page dumped because: kasan: bad access detected [ 30.340789] [ 30.341008] Memory state around the buggy address: [ 30.341602] ffff88801a88d900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.342470] ffff88801a88d980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.343329] >ffff88801a88da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.344193] ^ [ 30.344909] ffff88801a88da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.345780] ffff88801a88db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.346645] ================================================================== [ 30.347589] Disabling lock debugging due to kernel taint [ 32.904078] BUG: Bad rss-counter state mm:000000002c0cea30 type:MM_FILEPAGES val:33 [ 32.905257] BUG: Bad rss-counter state mm:000000002c0cea30 type:MM_ANONPAGES val:22 [ 33.476680] BUG: Bad rss-counter state mm:00000000e284a687 type:MM_FILEPAGES val:33 [ 33.477819] BUG: Bad rss-counter state mm:00000000e284a687 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21126' (ECDSA) to the list of known hosts. 2023/06/20 14:10:03 fuzzer started 2023/06/20 14:10:03 dialing manager at localhost:36067 2023/06/20 14:10:03 checking machine... 2023/06/20 14:10:03 checking revisions... [ 34.088170] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:10:03 testing simple program... [ 34.127565] cgroup: Unknown subsys name 'net' [ 34.199420] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:10:03 Registers: info registers vcpu 0 RAX=ffff88806ce0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09b01 RSI=ffff88806ce09bc8 RDI=ffff88806ce09aa8 RBP=ffff88806ce09bc8 RSP=ffff88806ce09a00 R8 =ffffffff860d825a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b8d R12=0000000000000008 R13=ffff88806ce02000 R14=ffff88806ce09bd0 R15=ffff88806ce09a98 RIP=ffffffff811304ce 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 00007f6cc36c2900 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=00007f6cc3c77650 CR3=0000000013a3c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f7a3b1a4000 CR3=000000000c6aa000 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=9958277fdb38038a9f4eb225722df15a XMM02=eff9b2d0a8fce9cb000000000011a868 XMM03=2c67c8bc2e329bc3000000000011a990 XMM04=9b86fc9946171ec400000000000ae988 XMM05=f52d8043357ba5f10000000000132e48 XMM06=c291bd5c70af25b90000000000131c38 XMM07=fb795ef6d65770560000000000121ed0 XMM08=2c67c8bc2e329bc3000000000011a990 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000