syzkaller login: [ 38.007724] BUG: Bad rss-counter state mm:00000000fc6b52ad type:MM_FILEPAGES val:33 [ 38.008410] BUG: Bad rss-counter state mm:00000000fc6b52ad type:MM_ANONPAGES val:22 [ 38.139180] ================================================================== [ 38.140104] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.141196] Read of size 8 at addr ffff88800f19fd08 by task sshd/220 [ 38.141978] [ 38.142199] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.143056] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.144068] Call Trace: [ 38.144389] [ 38.144665] dump_stack_lvl+0x91/0xf0 [ 38.145148] print_report+0xcc/0x620 [ 38.145652] ? __virt_addr_valid+0x102/0x340 [ 38.146173] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.146575] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.146980] kasan_report+0xbe/0xf0 [ 38.147328] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.147737] vma_interval_tree_remove+0xc75/0xec0 [ 38.148158] vma_prepare+0xc54/0x11a0 [ 38.148479] __split_vma+0x5af/0x950 [ 38.148788] ? __pfx___split_vma+0x10/0x10 [ 38.149138] ? find_held_lock+0x2c/0x110 [ 38.149537] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.149911] ? lock_is_held_type+0x9f/0x120 [ 38.150295] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.150687] ? mtree_range_walk+0x632/0x900 [ 38.151050] ? mas_walk+0x5c7/0x7c0 [ 38.151400] do_vmi_munmap+0x1f1/0x2b0 [ 38.151723] mmap_region+0x1f9/0x2660 [ 38.152033] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.152374] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.152843] ? __pfx_lock_acquire+0x10/0x10 [ 38.153224] ? __pfx_mmap_region+0x10/0x10 [ 38.153580] ? security_mmap_addr+0x7d/0xa0 [ 38.153922] ? get_unmapped_area+0x1f5/0x3f0 [ 38.154309] do_mmap+0x854/0xf00 [ 38.154612] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.154941] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.155337] ksys_mmap_pgoff+0x3af/0x500 [ 38.155667] do_syscall_64+0x3f/0x90 [ 38.155982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.156458] RIP: 0033:0x7fb4cda0dd82 [ 38.156762] 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 [ 38.158219] RSP: 002b:00007ffe39697428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.158858] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb4cda0dd82 [ 38.159431] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb4cce47000 [ 38.160000] RBP: 00007fb4cce47000 R08: 0000000000000009 R09: 0000000000001000 [ 38.160580] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563667afbec0 [ 38.161150] R13: 00007ffe39697440 R14: 00007ffe39697470 R15: 00007ffe396977d0 [ 38.161738] [ 38.161930] [ 38.162067] Allocated by task 213: [ 38.162357] kasan_save_stack+0x22/0x50 [ 38.162684] kasan_set_track+0x25/0x30 [ 38.163003] __kasan_slab_alloc+0x59/0x70 [ 38.163348] kmem_cache_alloc+0x16b/0x370 [ 38.163680] vm_area_dup+0x20/0x160 [ 38.163976] __split_vma+0x170/0x950 [ 38.164293] split_vma+0xc6/0x110 [ 38.164584] mprotect_fixup+0x8d2/0xb30 [ 38.164915] do_mprotect_pkey+0x87e/0xd40 [ 38.165288] __x64_sys_mprotect+0x78/0xc0 [ 38.165648] do_syscall_64+0x3f/0x90 [ 38.165949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.166425] [ 38.166564] Freed by task 19: [ 38.166818] kasan_save_stack+0x22/0x50 [ 38.167161] kasan_set_track+0x25/0x30 [ 38.167502] kasan_save_free_info+0x2b/0x50 [ 38.167850] __kasan_slab_free+0x10a/0x190 [ 38.168199] kmem_cache_free+0x10d/0x4d0 [ 38.168567] rcu_core+0x8c8/0x2860 [ 38.168860] __do_softirq+0x1b7/0x7d4 [ 38.169179] [ 38.169327] Last potentially related work creation: [ 38.169715] kasan_save_stack+0x22/0x50 [ 38.170039] __kasan_record_aux_stack+0x8e/0xa0 [ 38.170421] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.170852] remove_vma+0x139/0x170 [ 38.171150] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.171519] do_vmi_munmap+0x1f1/0x2b0 [ 38.171838] __vm_munmap+0x138/0x3a0 [ 38.172145] __x64_sys_munmap+0x59/0x80 [ 38.172473] do_syscall_64+0x3f/0x90 [ 38.172782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.173211] [ 38.173359] The buggy address belongs to the object at ffff88800f19fcb0 [ 38.173359] which belongs to the cache vm_area_struct of size 168 [ 38.174292] The buggy address is located 88 bytes inside of [ 38.174292] freed 168-byte region [ffff88800f19fcb0, ffff88800f19fd58) [ 38.175238] [ 38.175379] The buggy address belongs to the physical page: [ 38.175815] page:0000000064e1a944 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf19f [ 38.176545] memcg:ffff88800b38da01 [ 38.176829] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.177322] page_type: 0xffffffff() [ 38.177617] raw: 0100000000000200 ffff8880087a0c80 ffffea00005ab180 0000000000000009 [ 38.178217] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b38da01 [ 38.178830] page dumped because: kasan: bad access detected [ 38.179279] [ 38.179419] Memory state around the buggy address: [ 38.179805] ffff88800f19fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.180388] ffff88800f19fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.180960] >ffff88800f19fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.181540] ^ [ 38.181826] ffff88800f19fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.182404] ffff88800f19fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.183099] ================================================================== [ 38.183916] Disabling lock debugging due to kernel taint [ 40.132975] BUG: Bad rss-counter state mm:0000000037cf53cf type:MM_FILEPAGES val:33 [ 40.133783] BUG: Bad rss-counter state mm:0000000037cf53cf type:MM_ANONPAGES val:22 [ 40.519253] BUG: Bad rss-counter state mm:00000000b62e40a8 type:MM_FILEPAGES val:33 [ 40.519828] BUG: Bad rss-counter state mm:00000000b62e40a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54685' (ECDSA) to the list of known hosts. 2023/06/21 08:10:50 fuzzer started 2023/06/21 08:10:51 dialing manager at localhost:36067 2023/06/21 08:10:51 checking machine... 2023/06/21 08:10:51 checking revisions... [ 41.133663] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:10:51 testing simple program... [ 41.182609] cgroup: Unknown subsys name 'net' [ 41.222262] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:10:51 Registers: info registers vcpu 0 RAX=000000000000001c RBX=ffffffff85dbd818 RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff88806ce09998 R8 =ffffffff860d8256 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd814 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc5d RFL=00000212 [----A--] 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 00007f0af3325700 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=00007f71747d90b0 CR3=00000000096dc000 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=2030353a30313a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a30313a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801a3b0001 RBX=ffff88801a3afd48 RCX=ffffffff86138e01 RDX=ffff88801a3afd50 RSI=0000000000000000 RDI=ffff88801a3af9f8 RBP=ffff88801a3a8000 RSP=ffff88801a3af978 R8 =ffffffff86138eb4 R9 =ffff88801a3afa28 R10=0000000000038001 R11=0000000000020d9c R12=ffff88801a3afa48 R13=ffff88801a3afa30 R14=ffff88801a3afd48 R15=ffff88801a3af9e8 RIP=ffffffff8113128d RFL=00000287 [--S--PC] 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 00007f7174221900 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=00007f71747d8618 CR3=000000000f532000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000