syzkaller login: [ 61.211655] BUG: Bad rss-counter state mm:00000000f058eb58 type:MM_FILEPAGES val:33 [ 61.212885] BUG: Bad rss-counter state mm:00000000f058eb58 type:MM_ANONPAGES val:22 [ 61.388915] ================================================================== [ 61.390117] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.391490] Read of size 8 at addr ffff888009483ed8 by task sshd/227 [ 61.392488] [ 61.392760] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.393864] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.395111] Call Trace: [ 61.395515] [ 61.395879] dump_stack_lvl+0x91/0xf0 [ 61.396526] print_report+0xcc/0x620 [ 61.397136] ? __virt_addr_valid+0x102/0x340 [ 61.397807] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.398626] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.399421] kasan_report+0xbe/0xf0 [ 61.400032] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.400846] vma_interval_tree_remove+0xc75/0xec0 [ 61.401623] vma_prepare+0xc54/0x11a0 [ 61.402240] __split_vma+0x5af/0x950 [ 61.402833] ? __pfx___split_vma+0x10/0x10 [ 61.403498] ? find_held_lock+0x2c/0x110 [ 61.404160] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.404915] ? lock_is_held_type+0x9f/0x120 [ 61.405602] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.406367] ? mtree_range_walk+0x632/0x900 [ 61.407059] ? mas_walk+0x5c7/0x7c0 [ 61.407661] do_vmi_munmap+0x1f1/0x2b0 [ 61.408280] mmap_region+0x1f9/0x2660 [ 61.408902] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.409558] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.410469] ? __pfx_lock_acquire+0x10/0x10 [ 61.411144] ? __pfx_mmap_region+0x10/0x10 [ 61.411817] ? security_mmap_addr+0x7d/0xa0 [ 61.412505] ? get_unmapped_area+0x1f5/0x3f0 [ 61.413207] do_mmap+0x854/0xf00 [ 61.413768] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.414388] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.415105] ksys_mmap_pgoff+0x3af/0x500 [ 61.415753] do_syscall_64+0x3f/0x90 [ 61.416354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.417045] RIP: 0033:0x7fef5aa96d82 [ 61.417521] 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 [ 61.419670] RSP: 002b:00007ffc647ae508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.420602] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fef5aa96d82 [ 61.421465] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fef59ed0000 [ 61.422324] RBP: 00007fef59ed0000 R08: 0000000000000009 R09: 0000000000001000 [ 61.423190] R10: 0000000000000812 R11: 0000000000000206 R12: 000056150eb70ec0 [ 61.424053] R13: 00007ffc647ae520 R14: 00007ffc647ae550 R15: 00007ffc647ae8b0 [ 61.424952] [ 61.425247] [ 61.425468] Allocated by task 220: [ 61.425908] kasan_save_stack+0x22/0x50 [ 61.426421] kasan_set_track+0x25/0x30 [ 61.426931] __kasan_slab_alloc+0x59/0x70 [ 61.427468] kmem_cache_alloc+0x16b/0x370 [ 61.427990] vm_area_dup+0x20/0x160 [ 61.428455] __split_vma+0x170/0x950 [ 61.428930] split_vma+0xc6/0x110 [ 61.429376] mprotect_fixup+0x8d2/0xb30 [ 61.429882] do_mprotect_pkey+0x87e/0xd40 [ 61.430403] __x64_sys_mprotect+0x78/0xc0 [ 61.430926] do_syscall_64+0x3f/0x90 [ 61.431410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.432057] [ 61.432277] Freed by task 19: [ 61.432677] kasan_save_stack+0x22/0x50 [ 61.433185] kasan_set_track+0x25/0x30 [ 61.433683] kasan_save_free_info+0x2b/0x50 [ 61.434218] __kasan_slab_free+0x10a/0x190 [ 61.434761] kmem_cache_free+0x10d/0x4d0 [ 61.435274] rcu_core+0x8c8/0x2860 [ 61.435723] __do_softirq+0x1b7/0x7d4 [ 61.436206] [ 61.436452] Last potentially related work creation: [ 61.437073] kasan_save_stack+0x22/0x50 [ 61.437604] __kasan_record_aux_stack+0x8e/0xa0 [ 61.438210] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.438886] remove_vma+0x139/0x170 [ 61.439361] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.439949] do_vmi_munmap+0x1f1/0x2b0 [ 61.440471] __vm_munmap+0x138/0x3a0 [ 61.440965] __x64_sys_munmap+0x59/0x80 [ 61.441494] do_syscall_64+0x3f/0x90 [ 61.441997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.442676] [ 61.442902] The buggy address belongs to the object at ffff888009483e80 [ 61.442902] which belongs to the cache vm_area_struct of size 168 [ 61.444454] The buggy address is located 88 bytes inside of [ 61.444454] freed 168-byte region [ffff888009483e80, ffff888009483f28) [ 61.445933] [ 61.446158] The buggy address belongs to the physical page: [ 61.446854] page:000000001b5ab055 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9483 [ 61.447994] memcg:ffff88800e285101 [ 61.448457] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.449190] page_type: 0xffffffff() [ 61.449663] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 61.450635] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e285101 [ 61.451594] page dumped because: kasan: bad access detected [ 61.452293] [ 61.452528] Memory state around the buggy address: [ 61.453139] ffff888009483d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 61.454035] ffff888009483e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 61.454935] >ffff888009483e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.455835] ^ [ 61.456624] ffff888009483f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 61.457523] ffff888009483f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 61.458408] ================================================================== [ 61.459761] Disabling lock debugging due to kernel taint [ 63.613327] BUG: Bad rss-counter state mm:0000000035b2e551 type:MM_FILEPAGES val:33 [ 63.614333] BUG: Bad rss-counter state mm:0000000035b2e551 type:MM_ANONPAGES val:22 [ 64.059062] BUG: Bad rss-counter state mm:000000000e8f9d1e type:MM_FILEPAGES val:33 [ 64.060336] BUG: Bad rss-counter state mm:000000000e8f9d1e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15330' (ECDSA) to the list of known hosts. 2023/06/20 15:16:34 fuzzer started 2023/06/20 15:16:35 dialing manager at localhost:36067 2023/06/20 15:16:35 checking machine... 2023/06/20 15:16:35 checking revisions... [ 64.695164] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:16:35 testing simple program... [ 64.731124] cgroup: Unknown subsys name 'net' [ 64.778997] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:16:34 Registers: info registers vcpu 0 RAX=ffffffff81afbf50 RBX=000000000000801d RCX=0000000000000000 RDX=ffff888016f41b40 RSI=ffff88800dba2000 RDI=ffff88801667aa50 RBP=ffff88800dba2000 RSP=ffff88801a887a80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88800dba2180 R14=ffff88801667aa50 R15=ffff88800dba2198 RIP=ffffffff81afbf56 RFL=00000293 [--S-A-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 00007f20672e5900 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=00007f206789d0b0 CR3=000000001b9fc000 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=1ffffffff0c09ebd RBX=ffffffff8604f5ec RCX=ffffffff8451105d RDX=0000000000000000 RSI=ffffffff864b2f26 RDI=ffffffff8604f5d8 RBP=ffffffff8604f5e8 RSP=ffff88806cf099e0 R8 =ffffffff864b2f26 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffffffff8604f5f4 R13=ffffffff8604f5d8 R14=ffffffff8604f5e4 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 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=00007f10bf665c80 CR3=000000000d04e000 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=202687cbec5ada9e1249ddbda6289bb3 XMM02=000000000011c7f0ec2efd57dc4c00df XMM03=0000000000123530133545cdcc9af045 XMM04=d4b203df2cfd693500000000000ae988 XMM05=16bbfc4fa606b62500000000001333b0 XMM06=f3a5402c8c2f2c870000000000132218 XMM07=e042d86d42eb936e00000000001237b0 XMM08=133545cdcc9af045000000000011c850 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000