syzkaller login: [ 39.823322] BUG: Bad rss-counter state mm:0000000013b38291 type:MM_FILEPAGES val:33 [ 39.824760] BUG: Bad rss-counter state mm:0000000013b38291 type:MM_ANONPAGES val:22 [ 39.968418] ================================================================== [ 39.969510] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.970660] Read of size 8 at addr ffff88800edca4e0 by task sshd/220 [ 39.971606] [ 39.971872] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.972998] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.974202] Call Trace: [ 39.974599] [ 39.974946] dump_stack_lvl+0x91/0xf0 [ 39.975568] print_report+0xcc/0x620 [ 39.976157] ? __virt_addr_valid+0x102/0x340 [ 39.976832] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.977590] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.978353] kasan_report+0xbe/0xf0 [ 39.978934] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.979711] vma_interval_tree_remove+0xc75/0xec0 [ 39.980455] vma_prepare+0xc54/0x11a0 [ 39.981037] __split_vma+0x5af/0x950 [ 39.981619] ? __pfx___split_vma+0x10/0x10 [ 39.982264] ? find_held_lock+0x2c/0x110 [ 39.982894] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.983585] ? lock_is_held_type+0x9f/0x120 [ 39.984240] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.984974] ? mtree_range_walk+0x632/0x900 [ 39.985643] ? mas_walk+0x5c7/0x7c0 [ 39.986217] do_vmi_munmap+0x1f1/0x2b0 [ 39.986812] mmap_region+0x1f9/0x2660 [ 39.987423] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.988060] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.988932] ? __pfx_lock_acquire+0x10/0x10 [ 39.989582] ? __pfx_mmap_region+0x10/0x10 [ 39.990235] ? security_mmap_addr+0x7d/0xa0 [ 39.990893] ? get_unmapped_area+0x1f5/0x3f0 [ 39.991575] do_mmap+0x854/0xf00 [ 39.992107] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.992718] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.993403] ksys_mmap_pgoff+0x3af/0x500 [ 39.994028] do_syscall_64+0x3f/0x90 [ 39.994603] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.995412] RIP: 0033:0x7f5107620d82 [ 39.995970] 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 [ 39.998591] RSP: 002b:00007fff5fd391d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.999734] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5107620d82 [ 40.000788] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5106a5a000 [ 40.001839] RBP: 00007f5106a5a000 R08: 0000000000000009 R09: 0000000000001000 [ 40.002886] R10: 0000000000000812 R11: 0000000000000206 R12: 00005645e99a0ec0 [ 40.003948] R13: 00007fff5fd391f0 R14: 00007fff5fd39220 R15: 00007fff5fd39580 [ 40.005021] [ 40.005381] [ 40.005647] Allocated by task 213: [ 40.006168] kasan_save_stack+0x22/0x50 [ 40.006794] kasan_set_track+0x25/0x30 [ 40.007411] __kasan_slab_alloc+0x59/0x70 [ 40.008044] kmem_cache_alloc+0x16b/0x370 [ 40.008672] vm_area_dup+0x20/0x160 [ 40.009229] __split_vma+0x170/0x950 [ 40.009809] split_vma+0xc6/0x110 [ 40.010352] mprotect_fixup+0x8d2/0xb30 [ 40.010969] do_mprotect_pkey+0x87e/0xd40 [ 40.011632] __x64_sys_mprotect+0x78/0xc0 [ 40.012268] do_syscall_64+0x3f/0x90 [ 40.012842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.013687] [ 40.013949] Freed by task 203: [ 40.014434] kasan_save_stack+0x22/0x50 [ 40.015045] kasan_set_track+0x25/0x30 [ 40.015518] kasan_save_free_info+0x2b/0x50 [ 40.016023] __kasan_slab_free+0x10a/0x190 [ 40.016525] kmem_cache_free+0x10d/0x4d0 [ 40.017018] rcu_core+0x8c8/0x2860 [ 40.017437] __do_softirq+0x1b7/0x7d4 [ 40.017891] [ 40.018127] Last potentially related work creation: [ 40.018697] kasan_save_stack+0x22/0x50 [ 40.019190] __kasan_record_aux_stack+0x8e/0xa0 [ 40.019734] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.020341] remove_vma+0x139/0x170 [ 40.020768] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.021301] do_vmi_munmap+0x1f1/0x2b0 [ 40.021805] __vm_munmap+0x138/0x3a0 [ 40.022285] __x64_sys_munmap+0x59/0x80 [ 40.022791] do_syscall_64+0x3f/0x90 [ 40.023291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.023950] [ 40.024169] The buggy address belongs to the object at ffff88800edca488 [ 40.024169] which belongs to the cache vm_area_struct of size 168 [ 40.025668] The buggy address is located 88 bytes inside of [ 40.025668] freed 168-byte region [ffff88800edca488, ffff88800edca530) [ 40.027103] [ 40.027326] The buggy address belongs to the physical page: [ 40.027985] page:000000002d38de95 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedca [ 40.029101] memcg:ffff888016e08301 [ 40.029528] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.030196] page_type: 0xffffffff() [ 40.030656] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.031591] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e08301 [ 40.032534] page dumped because: kasan: bad access detected [ 40.033217] [ 40.033434] Memory state around the buggy address: [ 40.034012] ffff88800edca380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.034887] ffff88800edca400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 40.035765] >ffff88800edca480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.036616] ^ [ 40.037374] ffff88800edca500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 40.038236] ffff88800edca580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.039096] ================================================================== [ 40.040119] Disabling lock debugging due to kernel taint [ 42.074101] BUG: Bad rss-counter state mm:00000000dc043984 type:MM_FILEPAGES val:33 [ 42.075003] BUG: Bad rss-counter state mm:00000000dc043984 type:MM_ANONPAGES val:22 [ 42.606264] BUG: Bad rss-counter state mm:000000004d6a1d8e type:MM_FILEPAGES val:33 [ 42.607462] BUG: Bad rss-counter state mm:000000004d6a1d8e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58036' (ECDSA) to the list of known hosts. 2023/06/20 07:38:51 fuzzer started 2023/06/20 07:38:51 dialing manager at localhost:44161 2023/06/20 07:38:51 checking machine... 2023/06/20 07:38:51 checking revisions... [ 43.247479] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:38:51 testing simple program... [ 43.309641] cgroup: Unknown subsys name 'net' [ 43.349985] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:38:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8366cd3b RDX=00000000000266cd RSI=00000000000266cd RDI=ffffffff865816f4 RBP=ffff888015b9f3e0 RSP=ffff888015b9f318 R8 =0000000000000000 R9 =ffff888015b9f3c8 R10=0000000000038001 R11=0000000000020c4e R12=ffff888015b9f3e8 R13=ffff888015b9f3d0 R14=ffff888015b9f3c9 R15=ffff888015b9f388 RIP=ffffffff8113077a RFL=00000217 [----APC] 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 00007fc48b195900 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=00007fc48b74c618 CR3=000000000f322000 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=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 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=00007f3aed486040 CR3=000000000d9a4000 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=41278b7a451e7ab3784d1995839ce4d8 XMM02=2c67c8bc2e329bc3000000000011e538 XMM03=fb795ef6d65770560000000000124f88 XMM04=cc46ff44b0f2b90600000000000ae988 XMM05=6f0c5604d74af5f100000000001358d8 XMM06=4fda316b135da52b0000000000134978 XMM07=e042d86d42eb936e0000000000125208 XMM08=cb28cb17a2036d94000000000011e598 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000