syzkaller login: [ 36.849549] BUG: Bad rss-counter state mm:00000000564cd042 type:MM_FILEPAGES val:33 [ 36.851285] BUG: Bad rss-counter state mm:00000000564cd042 type:MM_ANONPAGES val:22 [ 37.052966] ================================================================== [ 37.054000] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.055173] Read of size 8 at addr ffff888016c88a50 by task sshd/221 [ 37.056032] [ 37.056278] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.057269] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.058354] Call Trace: [ 37.058708] [ 37.059037] dump_stack_lvl+0x91/0xf0 [ 37.059581] print_report+0xcc/0x620 [ 37.060118] ? __virt_addr_valid+0x102/0x340 [ 37.060729] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.061422] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.062117] kasan_report+0xbe/0xf0 [ 37.062660] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.063389] vma_interval_tree_remove+0xc75/0xec0 [ 37.064079] vma_prepare+0xc54/0x11a0 [ 37.064627] __split_vma+0x5af/0x950 [ 37.065172] ? __pfx___split_vma+0x10/0x10 [ 37.065779] ? find_held_lock+0x2c/0x110 [ 37.066368] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.067033] ? lock_is_held_type+0x9f/0x120 [ 37.067647] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.068336] ? mtree_range_walk+0x632/0x900 [ 37.068968] ? mas_walk+0x5c7/0x7c0 [ 37.069510] do_vmi_munmap+0x1f1/0x2b0 [ 37.070073] mmap_region+0x1f9/0x2660 [ 37.070620] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.071203] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.072005] ? __pfx_lock_acquire+0x10/0x10 [ 37.072608] ? __pfx_mmap_region+0x10/0x10 [ 37.073210] ? security_mmap_addr+0x7d/0xa0 [ 37.073814] ? get_unmapped_area+0x1f5/0x3f0 [ 37.074443] do_mmap+0x854/0xf00 [ 37.074953] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.075507] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.076155] ksys_mmap_pgoff+0x3af/0x500 [ 37.076737] do_syscall_64+0x3f/0x90 [ 37.077282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.078016] RIP: 0033:0x7f554ae15d82 [ 37.078529] 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 [ 37.080918] RSP: 002b:00007ffd5f7ec6d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.081909] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f554ae15d82 [ 37.082864] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f554a24f000 [ 37.083804] RBP: 00007f554a24f000 R08: 0000000000000009 R09: 0000000000001000 [ 37.084737] R10: 0000000000000812 R11: 0000000000000206 R12: 000056445eb60ec0 [ 37.085678] R13: 00007ffd5f7ec6f0 R14: 00007ffd5f7ec720 R15: 00007ffd5f7eca80 [ 37.086627] [ 37.086959] [ 37.087201] Allocated by task 214: [ 37.087684] kasan_save_stack+0x22/0x50 [ 37.088252] kasan_set_track+0x25/0x30 [ 37.088806] __kasan_slab_alloc+0x59/0x70 [ 37.089396] kmem_cache_alloc+0x16b/0x370 [ 37.089973] vm_area_dup+0x20/0x160 [ 37.090476] __split_vma+0x170/0x950 [ 37.091016] split_vma+0xc6/0x110 [ 37.091507] mprotect_fixup+0x8d2/0xb30 [ 37.092069] do_mprotect_pkey+0x87e/0xd40 [ 37.092656] __x64_sys_mprotect+0x78/0xc0 [ 37.093241] do_syscall_64+0x3f/0x90 [ 37.093768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.094488] [ 37.094731] Freed by task 214: [ 37.095178] kasan_save_stack+0x22/0x50 [ 37.095745] kasan_set_track+0x25/0x30 [ 37.096298] kasan_save_free_info+0x2b/0x50 [ 37.096896] __kasan_slab_free+0x10a/0x190 [ 37.097492] kmem_cache_free+0x10d/0x4d0 [ 37.098059] rcu_core+0x8c8/0x2860 [ 37.098559] __do_softirq+0x1b7/0x7d4 [ 37.099096] [ 37.099336] Last potentially related work creation: [ 37.099988] kasan_save_stack+0x22/0x50 [ 37.100553] __kasan_record_aux_stack+0x8e/0xa0 [ 37.101188] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.101912] remove_vma+0x139/0x170 [ 37.102420] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.103063] do_vmi_munmap+0x1f1/0x2b0 [ 37.103613] __vm_munmap+0x138/0x3a0 [ 37.104133] __x64_sys_munmap+0x59/0x80 [ 37.104693] do_syscall_64+0x3f/0x90 [ 37.105228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.105949] [ 37.106189] The buggy address belongs to the object at ffff888016c889f8 [ 37.106189] which belongs to the cache vm_area_struct of size 168 [ 37.107829] The buggy address is located 88 bytes inside of [ 37.107829] freed 168-byte region [ffff888016c889f8, ffff888016c88aa0) [ 37.109379] [ 37.109620] The buggy address belongs to the physical page: [ 37.110362] page:000000000a089a98 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c88 [ 37.111592] memcg:ffff888018de0201 [ 37.112069] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.112780] page_type: 0xffffffff() [ 37.113280] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.114306] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018de0201 [ 37.115331] page dumped because: kasan: bad access detected [ 37.116061] [ 37.116299] Memory state around the buggy address: [ 37.116941] ffff888016c88900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.117895] ffff888016c88980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 37.118849] >ffff888016c88a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.119789] ^ [ 37.120575] ffff888016c88a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 37.121520] ffff888016c88b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.122458] ================================================================== [ 37.123650] Disabling lock debugging due to kernel taint [ 39.079724] BUG: Bad rss-counter state mm:00000000a01545b1 type:MM_FILEPAGES val:33 [ 39.081123] BUG: Bad rss-counter state mm:00000000a01545b1 type:MM_ANONPAGES val:22 [ 39.639212] BUG: Bad rss-counter state mm:00000000d760470e type:MM_FILEPAGES val:33 [ 39.640445] BUG: Bad rss-counter state mm:00000000d760470e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20902' (ECDSA) to the list of known hosts. 2023/06/19 16:12:50 fuzzer started 2023/06/19 16:12:51 dialing manager at localhost:44161 2023/06/19 16:12:51 checking machine... 2023/06/19 16:12:51 checking revisions... [ 40.285242] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:12:51 testing simple program... [ 40.341143] cgroup: Unknown subsys name 'net' [ 40.395293] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:12:43 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88801a39fdf0 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81859ab6 RDI=ffff88801a39fdfc RBP=0000000000000000 RSP=ffff88801a39fd80 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000008000 R13=ffff88801a39fea8 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c07eb RFL=00000246 [---Z-P-] 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 00007fabf629d900 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=00007fabf68550b0 CR3=00000000099ea000 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=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=00007ffca8d0fa18 CR3=000000000d810000 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=2030353a32313a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a32313a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000