syzkaller login: [ 56.828252] BUG: Bad rss-counter state mm:000000002337b976 type:MM_FILEPAGES val:33 [ 56.829944] BUG: Bad rss-counter state mm:000000002337b976 type:MM_ANONPAGES val:22 [ 57.014534] ================================================================== [ 57.015726] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 57.017113] Read of size 8 at addr ffff88800fc86c20 by task sshd/222 [ 57.018147] [ 57.018444] CPU: 0 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 57.019855] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 57.021171] Call Trace: [ 57.021529] [ 57.021830] dump_stack_lvl+0x91/0xf0 [ 57.022367] print_report+0xcc/0x620 [ 57.022880] ? __virt_addr_valid+0x102/0x340 [ 57.023476] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.024135] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.024776] kasan_report+0xbe/0xf0 [ 57.025277] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.025917] vma_interval_tree_remove+0xc75/0xec0 [ 57.026558] vma_prepare+0xc54/0x11a0 [ 57.027068] __split_vma+0x5af/0x950 [ 57.027578] ? __pfx___split_vma+0x10/0x10 [ 57.028140] ? find_held_lock+0x2c/0x110 [ 57.028684] do_vmi_align_munmap+0x2ba/0x11f0 [ 57.029298] ? lock_is_held_type+0x9f/0x120 [ 57.029858] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 57.030505] ? mtree_range_walk+0x632/0x900 [ 57.031089] ? mas_walk+0x5c7/0x7c0 [ 57.031591] do_vmi_munmap+0x1f1/0x2b0 [ 57.032115] mmap_region+0x1f9/0x2660 [ 57.032606] ? vm_mmap_pgoff+0x15c/0x3a0 [ 57.033144] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 57.033888] ? __pfx_lock_acquire+0x10/0x10 [ 57.034470] ? __pfx_mmap_region+0x10/0x10 [ 57.035035] ? security_mmap_addr+0x7d/0xa0 [ 57.035614] ? get_unmapped_area+0x1f5/0x3f0 [ 57.036202] do_mmap+0x854/0xf00 [ 57.036659] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.037187] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 57.037767] ksys_mmap_pgoff+0x3af/0x500 [ 57.038324] do_syscall_64+0x3f/0x90 [ 57.038817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.039519] RIP: 0033:0x7f6dbfba0d82 [ 57.040005] 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 [ 57.042209] RSP: 002b:00007ffe9a8bb398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 57.043171] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6dbfba0d82 [ 57.044092] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6dbefda000 [ 57.044980] RBP: 00007f6dbefda000 R08: 0000000000000009 R09: 0000000000001000 [ 57.045862] R10: 0000000000000812 R11: 0000000000000206 R12: 00005644c6cd4f70 [ 57.046739] R13: 00007ffe9a8bb3b0 R14: 00007ffe9a8bb3e0 R15: 00007ffe9a8bb740 [ 57.047659] [ 57.047980] [ 57.048202] Allocated by task 213: [ 57.048647] kasan_save_stack+0x22/0x50 [ 57.049175] kasan_set_track+0x25/0x30 [ 57.049667] __kasan_slab_alloc+0x59/0x70 [ 57.050200] kmem_cache_alloc+0x16b/0x370 [ 57.050711] vm_area_dup+0x20/0x160 [ 57.051185] __split_vma+0x170/0x950 [ 57.051675] split_vma+0xc6/0x110 [ 57.052127] mprotect_fixup+0x8d2/0xb30 [ 57.052623] do_mprotect_pkey+0x87e/0xd40 [ 57.053161] __x64_sys_mprotect+0x78/0xc0 [ 57.053678] do_syscall_64+0x3f/0x90 [ 57.054170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.054809] [ 57.055050] Freed by task 213: [ 57.055451] kasan_save_stack+0x22/0x50 [ 57.055966] kasan_set_track+0x25/0x30 [ 57.056468] kasan_save_free_info+0x2b/0x50 [ 57.057017] __kasan_slab_free+0x10a/0x190 [ 57.057553] kmem_cache_free+0x10d/0x4d0 [ 57.058076] rcu_core+0x8c8/0x2860 [ 57.058518] __do_softirq+0x1b7/0x7d4 [ 57.059009] [ 57.059237] Last potentially related work creation: [ 57.059826] kasan_save_stack+0x22/0x50 [ 57.060359] __kasan_record_aux_stack+0x8e/0xa0 [ 57.060935] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.061592] remove_vma+0x139/0x170 [ 57.062080] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.062820] do_vmi_munmap+0x1f1/0x2b0 [ 57.063493] __vm_munmap+0x138/0x3a0 [ 57.064094] __x64_sys_munmap+0x59/0x80 [ 57.064596] do_syscall_64+0x3f/0x90 [ 57.065221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.065967] [ 57.066206] The buggy address belongs to the object at ffff88800fc86bc8 [ 57.066206] which belongs to the cache vm_area_struct of size 168 [ 57.067853] The buggy address is located 88 bytes inside of [ 57.067853] freed 168-byte region [ffff88800fc86bc8, ffff88800fc86c70) [ 57.069299] [ 57.069517] The buggy address belongs to the physical page: [ 57.070194] page:000000002980172c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc86 [ 57.071353] memcg:ffff88800f6f8c01 [ 57.071781] flags: 0x100000000000200(slab|node=0|zone=1) [ 57.072446] page_type: 0xffffffff() [ 57.072913] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 57.073842] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6f8c01 [ 57.074765] page dumped because: kasan: bad access detected [ 57.075455] [ 57.075674] Memory state around the buggy address: [ 57.076267] ffff88800fc86b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 57.077144] ffff88800fc86b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 57.078013] >ffff88800fc86c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 57.078865] ^ [ 57.079435] ffff88800fc86c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 57.080309] ffff88800fc86d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 57.081170] ================================================================== [ 57.082166] Disabling lock debugging due to kernel taint [ 59.112192] BUG: Bad rss-counter state mm:000000000aaa1e16 type:MM_FILEPAGES val:33 [ 59.113319] BUG: Bad rss-counter state mm:000000000aaa1e16 type:MM_ANONPAGES val:22 [ 59.533452] BUG: Bad rss-counter state mm:0000000057606d35 type:MM_FILEPAGES val:33 [ 59.534672] BUG: Bad rss-counter state mm:0000000057606d35 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8358' (ECDSA) to the list of known hosts. 2023/06/20 04:34:59 fuzzer started 2023/06/20 04:34:59 dialing manager at localhost:44161 2023/06/20 04:34:59 checking machine... 2023/06/20 04:34:59 checking revisions... [ 60.200778] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:34:59 testing simple program... [ 60.262149] cgroup: Unknown subsys name 'net' [ 60.310997] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:34:32 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff856529e0 RCX=0000000080000000 RDX=ffff888016a30000 RSI=ffffffff814c842f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800fdd7690 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f7944d81366 R13=0000000000000000 R14=ffff888016a30000 R15=0000000000082cc0 RIP=ffffffff814c07f1 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 00007f794488e900 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=00007ffe8f95f000 CR3=000000000dcf6000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=ffff888008c58400 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=00007f2f314aebf0 CR3=000000000e9c0000 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=2038353a34333a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a34333a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000