syzkaller login: [ 30.203363] BUG: Bad rss-counter state mm:000000008f793bc0 type:MM_FILEPAGES val:33 [ 30.204025] BUG: Bad rss-counter state mm:000000008f793bc0 type:MM_ANONPAGES val:22 [ 30.408813] ================================================================== [ 30.409429] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.410076] Read of size 8 at addr ffff88801a193df0 by task sshd/222 [ 30.414611] [ 30.426460] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.427051] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.427696] Call Trace: [ 30.427913] [ 30.428103] dump_stack_lvl+0x91/0xf0 [ 30.428432] print_report+0xcc/0x620 [ 30.428756] ? __virt_addr_valid+0x102/0x340 [ 30.429122] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.429536] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.429947] kasan_report+0xbe/0xf0 [ 30.430352] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.430776] vma_interval_tree_remove+0xc75/0xec0 [ 30.431220] vma_prepare+0xc54/0x11a0 [ 30.431538] __split_vma+0x5af/0x950 [ 30.431853] ? __pfx___split_vma+0x10/0x10 [ 30.432197] ? find_held_lock+0x2c/0x110 [ 30.432542] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.432911] ? lock_is_held_type+0x9f/0x120 [ 30.433261] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.433651] ? mtree_range_walk+0x632/0x900 [ 30.434015] ? mas_walk+0x5c7/0x7c0 [ 30.434408] do_vmi_munmap+0x1f1/0x2b0 [ 30.434740] mmap_region+0x1f9/0x2660 [ 30.435091] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.435442] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.435917] ? __pfx_lock_acquire+0x10/0x10 [ 30.436269] ? __pfx_mmap_region+0x10/0x10 [ 30.436620] ? security_mmap_addr+0x7d/0xa0 [ 30.436956] ? get_unmapped_area+0x1f5/0x3f0 [ 30.437345] do_mmap+0x854/0xf00 [ 30.437618] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.437923] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.438309] ksys_mmap_pgoff+0x3af/0x500 [ 30.438621] do_syscall_64+0x3f/0x90 [ 30.438914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.439316] RIP: 0033:0x7f81a6cded82 [ 30.439600] 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 [ 30.440953] RSP: 002b:00007fff06dd88e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.441573] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f81a6cded82 [ 30.442129] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f81a6118000 [ 30.442711] RBP: 00007f81a6118000 R08: 0000000000000009 R09: 0000000000001000 [ 30.443311] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ef41202ec0 [ 30.443870] R13: 00007fff06dd8900 R14: 00007fff06dd8930 R15: 00007fff06dd8c90 [ 30.444463] [ 30.444662] [ 30.444809] Allocated by task 213: [ 30.445094] kasan_save_stack+0x22/0x50 [ 30.445436] kasan_set_track+0x25/0x30 [ 30.445764] __kasan_slab_alloc+0x59/0x70 [ 30.446114] kmem_cache_alloc+0x16b/0x370 [ 30.446477] vm_area_dup+0x20/0x160 [ 30.446768] __split_vma+0x170/0x950 [ 30.447064] split_vma+0xc6/0x110 [ 30.447386] mprotect_fixup+0x8d2/0xb30 [ 30.447701] do_mprotect_pkey+0x87e/0xd40 [ 30.448026] __x64_sys_mprotect+0x78/0xc0 [ 30.448373] do_syscall_64+0x3f/0x90 [ 30.448668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.449069] [ 30.449209] Freed by task 213: [ 30.449450] kasan_save_stack+0x22/0x50 [ 30.449775] kasan_set_track+0x25/0x30 [ 30.450081] kasan_save_free_info+0x2b/0x50 [ 30.450481] __kasan_slab_free+0x10a/0x190 [ 30.450832] kmem_cache_free+0x10d/0x4d0 [ 30.451185] rcu_core+0x8c8/0x2860 [ 30.451452] __do_softirq+0x1b7/0x7d4 [ 30.451748] [ 30.451888] Last potentially related work creation: [ 30.452253] kasan_save_stack+0x22/0x50 [ 30.452563] __kasan_record_aux_stack+0x8e/0xa0 [ 30.452910] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.453366] remove_vma+0x139/0x170 [ 30.453648] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.454004] do_vmi_munmap+0x1f1/0x2b0 [ 30.454386] __vm_munmap+0x138/0x3a0 [ 30.454681] __x64_sys_munmap+0x59/0x80 [ 30.454994] do_syscall_64+0x3f/0x90 [ 30.455305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.455717] [ 30.455855] The buggy address belongs to the object at ffff88801a193d98 [ 30.455855] which belongs to the cache vm_area_struct of size 168 [ 30.456822] The buggy address is located 88 bytes inside of [ 30.456822] freed 168-byte region [ffff88801a193d98, ffff88801a193e40) [ 30.457725] [ 30.457863] The buggy address belongs to the physical page: [ 30.458292] page:000000001750c921 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a193 [ 30.459003] memcg:ffff88800f27af01 [ 30.459325] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.459746] page_type: 0xffffffff() [ 30.460039] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.460638] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f27af01 [ 30.461211] page dumped because: kasan: bad access detected [ 30.461644] [ 30.461786] Memory state around the buggy address: [ 30.462162] ffff88801a193c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.462741] ffff88801a193d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.463341] >ffff88801a193d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.463892] ^ [ 30.464445] ffff88801a193e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.465014] ffff88801a193e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.465560] ================================================================== [ 30.466438] Disabling lock debugging due to kernel taint [ 36.371479] BUG: Bad rss-counter state mm:00000000ad50f8f0 type:MM_FILEPAGES val:33 [ 36.372193] BUG: Bad rss-counter state mm:00000000ad50f8f0 type:MM_ANONPAGES val:22 [ 37.707578] BUG: Bad rss-counter state mm:00000000d91f30f4 type:MM_FILEPAGES val:33 [ 37.708241] BUG: Bad rss-counter state mm:00000000d91f30f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20543' (ECDSA) to the list of known hosts. 2023/06/21 10:24:51 fuzzer started 2023/06/21 10:24:51 dialing manager at localhost:36067 2023/06/21 10:24:51 checking machine... 2023/06/21 10:24:51 checking revisions... [ 38.585835] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:24:51 testing simple program... [ 38.638244] cgroup: Unknown subsys name 'net' [ 38.708995] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:24:51 Registers: info registers vcpu 0 RAX=ffffffff86098097 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801a1d76c8 RSP=ffff88801a1d75b0 R8 =ffffffff86098096 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88801a1d76d0 R13=ffff88801a1d76b8 R14=ffff88801a1d76b1 R15=ffff88801a1d7670 RIP=ffffffff81130abf 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 00007fdec0cd2900 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=00007fdec0cd26f8 CR3=000000001800e000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff84537da7 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a88 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff8880100251c0 R15=ffff88801a12fc60 RIP=ffffffff813ad47f 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 00007f86d673c700 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=00007ffe51f473f8 CR3=0000000015d76000 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=2031353a34323a3031203132206e754a XMM01=5d3134323830372e37332020205b203a XMM02=415f4d4d3a6570797420346630336631 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a34323a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000