syzkaller login: [ 31.210257] BUG: Bad rss-counter state mm:00000000f2c8d2a7 type:MM_FILEPAGES val:33 [ 31.211250] BUG: Bad rss-counter state mm:00000000f2c8d2a7 type:MM_ANONPAGES val:22 [ 31.401376] ================================================================== [ 31.402379] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.403674] Read of size 8 at addr ffff88800fd7f3f8 by task sshd/220 [ 31.404471] [ 31.404691] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.405577] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.406571] Call Trace: [ 31.406894] [ 31.407172] dump_stack_lvl+0x91/0xf0 [ 31.407750] print_report+0xcc/0x620 [ 31.408243] ? __virt_addr_valid+0x102/0x340 [ 31.408803] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.409439] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.410070] kasan_report+0xbe/0xf0 [ 31.410559] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.411199] vma_interval_tree_remove+0xc75/0xec0 [ 31.411854] vma_prepare+0xc54/0x11a0 [ 31.412351] __split_vma+0x5af/0x950 [ 31.412844] ? __pfx___split_vma+0x10/0x10 [ 31.413389] ? find_held_lock+0x2c/0x110 [ 31.413930] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.414512] ? lock_is_held_type+0x9f/0x120 [ 31.415068] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.415739] ? mtree_range_walk+0x632/0x900 [ 31.416336] ? mas_walk+0x5c7/0x7c0 [ 31.416853] do_vmi_munmap+0x1f1/0x2b0 [ 31.417359] mmap_region+0x1f9/0x2660 [ 31.417854] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.418395] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.419161] ? __pfx_lock_acquire+0x10/0x10 [ 31.419775] ? __pfx_mmap_region+0x10/0x10 [ 31.420323] ? security_mmap_addr+0x7d/0xa0 [ 31.420887] ? get_unmapped_area+0x1f5/0x3f0 [ 31.421471] do_mmap+0x854/0xf00 [ 31.421937] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.422459] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.423054] ksys_mmap_pgoff+0x3af/0x500 [ 31.423606] do_syscall_64+0x3f/0x90 [ 31.424121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.424826] RIP: 0033:0x7f0dd39a9d82 [ 31.425295] 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 [ 31.427521] RSP: 002b:00007ffc150d71d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.428460] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0dd39a9d82 [ 31.429337] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0dd2de3000 [ 31.430207] RBP: 00007f0dd2de3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.431084] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ac1180b20 [ 31.432001] R13: 00007ffc150d71f0 R14: 00007ffc150d7220 R15: 00007ffc150d7580 [ 31.432861] [ 31.433198] [ 31.433414] Allocated by task 213: [ 31.433863] kasan_save_stack+0x22/0x50 [ 31.434392] kasan_set_track+0x25/0x30 [ 31.434890] __kasan_slab_alloc+0x59/0x70 [ 31.435503] kmem_cache_alloc+0x16b/0x370 [ 31.436035] vm_area_dup+0x20/0x160 [ 31.436497] __split_vma+0x170/0x950 [ 31.436987] split_vma+0xc6/0x110 [ 31.437451] mprotect_fixup+0x8d2/0xb30 [ 31.437963] do_mprotect_pkey+0x87e/0xd40 [ 31.438497] __x64_sys_mprotect+0x78/0xc0 [ 31.439053] do_syscall_64+0x3f/0x90 [ 31.439609] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.440298] [ 31.440512] Freed by task 13: [ 31.440883] kasan_save_stack+0x22/0x50 [ 31.441391] kasan_set_track+0x25/0x30 [ 31.441900] kasan_save_free_info+0x2b/0x50 [ 31.442479] __kasan_slab_free+0x10a/0x190 [ 31.443022] kmem_cache_free+0x10d/0x4d0 [ 31.443556] rcu_core+0x8c8/0x2860 [ 31.444029] __do_softirq+0x1b7/0x7d4 [ 31.444530] [ 31.444744] Last potentially related work creation: [ 31.445475] kasan_save_stack+0x22/0x50 [ 31.445992] __kasan_record_aux_stack+0x8e/0xa0 [ 31.446588] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.447215] remove_vma+0x139/0x170 [ 31.447705] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.448271] do_vmi_munmap+0x1f1/0x2b0 [ 31.448790] __vm_munmap+0x138/0x3a0 [ 31.449255] __x64_sys_munmap+0x59/0x80 [ 31.449749] do_syscall_64+0x3f/0x90 [ 31.450221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.450860] [ 31.451078] The buggy address belongs to the object at ffff88800fd7f3a0 [ 31.451078] which belongs to the cache vm_area_struct of size 168 [ 31.452603] The buggy address is located 88 bytes inside of [ 31.452603] freed 168-byte region [ffff88800fd7f3a0, ffff88800fd7f448) [ 31.453989] [ 31.454202] The buggy address belongs to the physical page: [ 31.454889] page:0000000037fd92a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd7f [ 31.455984] memcg:ffff88800ecd0401 [ 31.456396] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.457019] page_type: 0xffffffff() [ 31.457448] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.458324] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecd0401 [ 31.459214] page dumped because: kasan: bad access detected [ 31.459913] [ 31.460143] Memory state around the buggy address: [ 31.460755] ffff88800fd7f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.461559] ffff88800fd7f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.462351] >ffff88800fd7f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.463142] ^ [ 31.463993] ffff88800fd7f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.464811] ffff88800fd7f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.465621] ================================================================== [ 31.466646] Disabling lock debugging due to kernel taint [ 33.365658] BUG: Bad rss-counter state mm:0000000070d1164e type:MM_FILEPAGES val:33 [ 33.366728] BUG: Bad rss-counter state mm:0000000070d1164e type:MM_ANONPAGES val:22 [ 33.716470] BUG: Bad rss-counter state mm:00000000f89df736 type:MM_FILEPAGES val:33 [ 33.717189] BUG: Bad rss-counter state mm:00000000f89df736 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14065' (ECDSA) to the list of known hosts. 2023/06/21 09:25:40 fuzzer started 2023/06/21 09:25:40 dialing manager at localhost:36067 2023/06/21 09:25:40 checking machine... 2023/06/21 09:25:40 checking revisions... [ 34.274636] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:25:40 testing simple program... [ 34.309087] cgroup: Unknown subsys name 'net' [ 34.354920] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:25:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f735fcf66c8 CR3=0000000016758000 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=2030343a35323a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a35323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81741111 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100394be36 RSI=ffffffff81741111 RDI=ffff88801ca5f220 RBP=ffff88801ca5f1f0 RSP=ffff88801ca5f150 R8 =0000000000000001 R9 =ffff88801ca5f198 R10=0000000000038001 R11=000000000001e427 R12=ffff88801ca5f220 R13=0000000000000000 R14=ffff88800fc60000 R15=ffff88800d0105f0 RIP=ffffffff813ad474 RFL=00000286 [--S--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 00007f7010030900 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=00007f700ffd5008 CR3=000000000ca3c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000