syzkaller login: [ 31.068379] BUG: Bad rss-counter state mm:00000000caf1065f type:MM_FILEPAGES val:33 [ 31.069576] BUG: Bad rss-counter state mm:00000000caf1065f type:MM_ANONPAGES val:22 [ 31.160802] ================================================================== [ 31.161870] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.162895] Read of size 8 at addr ffff88800dd2c798 by task sshd/219 [ 31.163743] [ 31.163960] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.164999] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.166001] Call Trace: [ 31.166330] [ 31.166629] dump_stack_lvl+0x91/0xf0 [ 31.167121] print_report+0xcc/0x620 [ 31.167602] ? __virt_addr_valid+0x102/0x340 [ 31.168152] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.168764] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.169389] kasan_report+0xbe/0xf0 [ 31.169883] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.170502] vma_interval_tree_remove+0xc75/0xec0 [ 31.171107] vma_prepare+0xc54/0x11a0 [ 31.171582] __split_vma+0x5af/0x950 [ 31.172054] ? __pfx___split_vma+0x10/0x10 [ 31.172585] ? find_held_lock+0x2c/0x110 [ 31.173103] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.173663] ? lock_is_held_type+0x9f/0x120 [ 31.174216] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.174828] ? mtree_range_walk+0x632/0x900 [ 31.175382] ? mas_walk+0x5c7/0x7c0 [ 31.175854] do_vmi_munmap+0x1f1/0x2b0 [ 31.176353] mmap_region+0x1f9/0x2660 [ 31.176838] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.177354] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.178089] ? __pfx_lock_acquire+0x10/0x10 [ 31.178625] ? __pfx_mmap_region+0x10/0x10 [ 31.179156] ? security_mmap_addr+0x7d/0xa0 [ 31.179687] ? get_unmapped_area+0x1f5/0x3f0 [ 31.180235] do_mmap+0x854/0xf00 [ 31.180675] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.181177] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.181733] ksys_mmap_pgoff+0x3af/0x500 [ 31.182253] do_syscall_64+0x3f/0x90 [ 31.182730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.183381] RIP: 0033:0x7f72c1a99d82 [ 31.183834] 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 [ 31.185956] RSP: 002b:00007fff3293d268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.186854] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72c1a99d82 [ 31.187701] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72c0ed3000 [ 31.188551] RBP: 00007f72c0ed3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.189392] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636c6c69ec0 [ 31.190262] R13: 00007fff3293d280 R14: 00007fff3293d2b0 R15: 00007fff3293d610 [ 31.191315] [ 31.191654] [ 31.191885] Allocated by task 212: [ 31.192320] kasan_save_stack+0x22/0x50 [ 31.192849] kasan_set_track+0x25/0x30 [ 31.193349] __kasan_slab_alloc+0x59/0x70 [ 31.193905] kmem_cache_alloc+0x16b/0x370 [ 31.194429] vm_area_dup+0x20/0x160 [ 31.194892] __split_vma+0x170/0x950 [ 31.195367] split_vma+0xc6/0x110 [ 31.195851] mprotect_fixup+0x8d2/0xb30 [ 31.196446] do_mprotect_pkey+0x87e/0xd40 [ 31.197040] __x64_sys_mprotect+0x78/0xc0 [ 31.197667] do_syscall_64+0x3f/0x90 [ 31.198262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.198933] [ 31.199142] Freed by task 212: [ 31.199535] kasan_save_stack+0x22/0x50 [ 31.200064] kasan_set_track+0x25/0x30 [ 31.200571] kasan_save_free_info+0x2b/0x50 [ 31.201117] __kasan_slab_free+0x10a/0x190 [ 31.201658] kmem_cache_free+0x10d/0x4d0 [ 31.202179] rcu_core+0x8c8/0x2860 [ 31.202631] __do_softirq+0x1b7/0x7d4 [ 31.203111] [ 31.203330] Last potentially related work creation: [ 31.203926] kasan_save_stack+0x22/0x50 [ 31.204450] __kasan_record_aux_stack+0x8e/0xa0 [ 31.205041] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.205713] remove_vma+0x139/0x170 [ 31.206181] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.206749] do_vmi_munmap+0x1f1/0x2b0 [ 31.207246] __vm_munmap+0x138/0x3a0 [ 31.207718] __x64_sys_munmap+0x59/0x80 [ 31.208239] do_syscall_64+0x3f/0x90 [ 31.208723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.209373] [ 31.209588] Second to last potentially related work creation: [ 31.210317] kasan_save_stack+0x22/0x50 [ 31.210827] __kasan_record_aux_stack+0x8e/0xa0 [ 31.211407] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.212059] remove_vma+0x139/0x170 [ 31.212520] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.213084] do_vmi_munmap+0x1f1/0x2b0 [ 31.213601] mmap_region+0x1f9/0x2660 [ 31.214103] do_mmap+0x854/0xf00 [ 31.214549] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.215057] ksys_mmap_pgoff+0x3af/0x500 [ 31.215587] do_syscall_64+0x3f/0x90 [ 31.216087] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.216735] [ 31.216955] The buggy address belongs to the object at ffff88800dd2c740 [ 31.216955] which belongs to the cache vm_area_struct of size 168 [ 31.218464] The buggy address is located 88 bytes inside of [ 31.218464] freed 168-byte region [ffff88800dd2c740, ffff88800dd2c7e8) [ 31.219888] [ 31.220104] The buggy address belongs to the physical page: [ 31.220785] page:00000000bcb334b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd2c [ 31.221896] memcg:ffff88800eaf0101 [ 31.222323] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.223045] page_type: 0xffffffff() [ 31.223507] raw: 0100000000000200 ffff88800879fc80 ffffea000039f980 dead000000000007 [ 31.224441] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eaf0101 [ 31.225356] page dumped because: kasan: bad access detected [ 31.226028] [ 31.226244] Memory state around the buggy address: [ 31.226835] ffff88800dd2c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.227706] ffff88800dd2c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.228573] >ffff88800dd2c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.229466] ^ [ 31.230008] ffff88800dd2c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.230902] ffff88800dd2c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.231770] ================================================================== [ 31.232800] Disabling lock debugging due to kernel taint [ 33.228319] BUG: Bad rss-counter state mm:000000008e70701d type:MM_FILEPAGES val:33 [ 33.229319] BUG: Bad rss-counter state mm:000000008e70701d type:MM_ANONPAGES val:22 [ 33.698469] BUG: Bad rss-counter state mm:0000000031a953a2 type:MM_FILEPAGES val:33 [ 33.699514] BUG: Bad rss-counter state mm:0000000031a953a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55120' (ECDSA) to the list of known hosts. 2023/06/19 14:38:52 fuzzer started 2023/06/19 14:38:53 dialing manager at localhost:44161 2023/06/19 14:38:53 checking machine... 2023/06/19 14:38:53 checking revisions... [ 34.442407] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:38:53 testing simple program... [ 34.494726] cgroup: Unknown subsys name 'net' [ 34.531038] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:38:52 Registers: info registers vcpu 0 RAX=000055bac4431010 RBX=0000000000000005 RCX=0000000000000015 RDX=0000000000000002 RSI=000055bac447b880 RDI=0000000000000064 RBP=0000000000000064 RSP=00007ffc268c7d30 R8 =000055bac447be00 R9 =00007f1cbbd356fe R10=0000000000000001 R11=0000000000000000 R12=fffffffffffffe28 R13=00007ffc268c7e90 R14=0000000000000002 R15=000000000000000a RIP=00007f1cbb68520b RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1cbb207900 00000000 00000000 GS =0000 0000000000000000 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=00007f1cbb7bc650 CR3=000000000e9a0000 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=ffffffffffffffffffff000000000000 XMM01=01000101010101010100ffffffffffff XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000ffffff XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85e0250c RCX=ffffffff8185ae42 RDX=0000000000000001 RSI=ffffffff8613fda0 RDI=ffffffff85e0250c RBP=ffffffff85e0250c RSP=ffff88800db0f8d0 R8 =ffffffff8613fda0 R9 =ffff88800db0f9c8 R10=0000000000038001 R11=000000000002244e R12=ffffffff85e02510 R13=ffffffff85e0250c R14=ffffffff85e0250c R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000257 [---ZAPC] 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 00007f1cbb207900 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=00007f1cbb7bf0b0 CR3=000000000e9a0000 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=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