syzkaller login: [ 32.134451] BUG: Bad rss-counter state mm:0000000046c4432b type:MM_FILEPAGES val:33 [ 32.135740] BUG: Bad rss-counter state mm:0000000046c4432b type:MM_ANONPAGES val:22 [ 32.285102] ================================================================== [ 32.286014] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.286953] Read of size 8 at addr ffff8880097e7df0 by task sshd/220 [ 32.287714] [ 32.287934] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.288920] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.289968] Call Trace: [ 32.290296] [ 32.290585] dump_stack_lvl+0x91/0xf0 [ 32.291076] print_report+0xcc/0x620 [ 32.291574] ? __virt_addr_valid+0x102/0x340 [ 32.292296] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.293146] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.293951] kasan_report+0xbe/0xf0 [ 32.294564] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.295349] vma_interval_tree_remove+0xc75/0xec0 [ 32.296109] vma_prepare+0xc54/0x11a0 [ 32.296724] __split_vma+0x5af/0x950 [ 32.297320] ? __pfx___split_vma+0x10/0x10 [ 32.298011] ? find_held_lock+0x2c/0x110 [ 32.298681] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.299269] ? lock_is_held_type+0x9f/0x120 [ 32.299836] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.300478] ? mtree_range_walk+0x632/0x900 [ 32.301070] ? mas_walk+0x5c7/0x7c0 [ 32.301551] do_vmi_munmap+0x1f1/0x2b0 [ 32.302138] mmap_region+0x1f9/0x2660 [ 32.302639] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.303146] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.303910] ? __pfx_lock_acquire+0x10/0x10 [ 32.304473] ? __pfx_mmap_region+0x10/0x10 [ 32.305037] ? security_mmap_addr+0x7d/0xa0 [ 32.305605] ? get_unmapped_area+0x1f5/0x3f0 [ 32.306186] do_mmap+0x854/0xf00 [ 32.306653] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.307185] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.307783] ksys_mmap_pgoff+0x3af/0x500 [ 32.308322] do_syscall_64+0x3f/0x90 [ 32.308829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.309509] RIP: 0033:0x7f7b0f60cd82 [ 32.309994] 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 [ 32.312247] RSP: 002b:00007ffd94c6a808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.313221] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b0f60cd82 [ 32.314154] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b0ea46000 [ 32.315062] RBP: 00007f7b0ea46000 R08: 0000000000000009 R09: 0000000000001000 [ 32.315973] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a56e7aaf70 [ 32.316907] R13: 00007ffd94c6a820 R14: 00007ffd94c6a850 R15: 00007ffd94c6abb0 [ 32.317828] [ 32.318195] [ 32.318421] Allocated by task 213: [ 32.318887] kasan_save_stack+0x22/0x50 [ 32.319423] kasan_set_track+0x25/0x30 [ 32.319948] __kasan_slab_alloc+0x59/0x70 [ 32.320498] kmem_cache_alloc+0x16b/0x370 [ 32.321074] vm_area_dup+0x20/0x160 [ 32.321553] __split_vma+0x170/0x950 [ 32.322087] split_vma+0xc6/0x110 [ 32.322545] mprotect_fixup+0x8d2/0xb30 [ 32.323077] do_mprotect_pkey+0x87e/0xd40 [ 32.323633] __x64_sys_mprotect+0x78/0xc0 [ 32.324176] do_syscall_64+0x3f/0x90 [ 32.324696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.325371] [ 32.325598] Freed by task 210: [ 32.326009] kasan_save_stack+0x22/0x50 [ 32.326540] kasan_set_track+0x25/0x30 [ 32.327062] kasan_save_free_info+0x2b/0x50 [ 32.327624] __kasan_slab_free+0x10a/0x190 [ 32.328183] kmem_cache_free+0x10d/0x4d0 [ 32.328721] rcu_core+0x8c8/0x2860 [ 32.329198] __do_softirq+0x1b7/0x7d4 [ 32.329692] [ 32.329912] Last potentially related work creation: [ 32.330581] kasan_save_stack+0x22/0x50 [ 32.331117] __kasan_record_aux_stack+0x8e/0xa0 [ 32.331715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.332384] remove_vma+0x139/0x170 [ 32.332883] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.333480] do_vmi_munmap+0x1f1/0x2b0 [ 32.333991] __vm_munmap+0x138/0x3a0 [ 32.334483] __x64_sys_munmap+0x59/0x80 [ 32.335002] do_syscall_64+0x3f/0x90 [ 32.335499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.336173] [ 32.336398] The buggy address belongs to the object at ffff8880097e7d98 [ 32.336398] which belongs to the cache vm_area_struct of size 168 [ 32.337953] The buggy address is located 88 bytes inside of [ 32.337953] freed 168-byte region [ffff8880097e7d98, ffff8880097e7e40) [ 32.339437] [ 32.339662] The buggy address belongs to the physical page: [ 32.340391] page:000000004a188c5a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x97e7 [ 32.341539] memcg:ffff88800eaec101 [ 32.341986] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.342714] page_type: 0xffffffff() [ 32.343184] raw: 0100000000000200 ffff88800879fc80 ffffea00003a7a80 dead000000000005 [ 32.344152] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eaec101 [ 32.345117] page dumped because: kasan: bad access detected [ 32.345825] [ 32.346051] Memory state around the buggy address: [ 32.346662] ffff8880097e7c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.347561] ffff8880097e7d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.348467] >ffff8880097e7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.349365] ^ [ 32.350211] ffff8880097e7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.351112] ffff8880097e7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.352010] ================================================================== [ 32.353076] Disabling lock debugging due to kernel taint [ 35.286877] BUG: Bad rss-counter state mm:0000000096c7b0cf type:MM_FILEPAGES val:33 [ 35.288157] BUG: Bad rss-counter state mm:0000000096c7b0cf type:MM_ANONPAGES val:22 [ 35.679472] BUG: Bad rss-counter state mm:00000000c705dd37 type:MM_FILEPAGES val:33 [ 35.680649] BUG: Bad rss-counter state mm:00000000c705dd37 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56298' (ECDSA) to the list of known hosts. 2023/06/19 19:45:40 fuzzer started 2023/06/19 19:45:41 dialing manager at localhost:44161 2023/06/19 19:45:41 checking machine... 2023/06/19 19:45:41 checking revisions... [ 36.404966] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:45:41 testing simple program... [ 36.454562] cgroup: Unknown subsys name 'net' [ 36.492789] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:45:39 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fcfcffa5fa0 CR3=000000000c63a000 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=2030343a35343a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a35343a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880143d75e8 RCX=0000000000000001 RDX=1ffff1100287aed6 RSI=ffffffff84506c7f RDI=ffff8880143d75f4 RBP=ffff8880143d76b0 RSP=ffff8880143d7500 R8 =0000000000000001 R9 =ffff8880143d7560 R10=0000000000038001 R11=000000000008abed R12=ffff8880143d75e8 R13=0000000000000000 R14=ffff888014191b40 R15=00000000000000a4 RIP=ffffffff813ad4f7 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 00007fdf4ad2c900 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=00007ffd86759000 CR3=0000000019e32000 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=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