syzkaller login: [ 30.932473] BUG: Bad rss-counter state mm:00000000d3faa7b8 type:MM_FILEPAGES val:33 [ 30.933465] BUG: Bad rss-counter state mm:00000000d3faa7b8 type:MM_ANONPAGES val:22 [ 30.970056] ================================================================== [ 30.971019] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.971966] Read of size 8 at addr ffff88800f079880 by task sshd/219 [ 30.972738] [ 30.972964] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.973855] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.974840] Call Trace: [ 30.975170] [ 30.975466] dump_stack_lvl+0x91/0xf0 [ 30.975957] print_report+0xcc/0x620 [ 30.976445] ? __virt_addr_valid+0x102/0x340 [ 30.976996] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.977620] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.978267] kasan_report+0xbe/0xf0 [ 30.978747] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.979373] vma_interval_tree_remove+0xc75/0xec0 [ 30.979983] vma_prepare+0xc54/0x11a0 [ 30.980468] __split_vma+0x5af/0x950 [ 30.981043] ? __pfx___split_vma+0x10/0x10 [ 30.981578] ? find_held_lock+0x2c/0x110 [ 30.982126] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.982693] ? lock_is_held_type+0x9f/0x120 [ 30.983272] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.983883] ? mtree_range_walk+0x632/0x900 [ 30.984443] ? mas_walk+0x5c7/0x7c0 [ 30.984930] do_vmi_munmap+0x1f1/0x2b0 [ 30.985428] mmap_region+0x1f9/0x2660 [ 30.985922] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.986444] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.987160] ? __pfx_lock_acquire+0x10/0x10 [ 30.987690] ? __pfx_mmap_region+0x10/0x10 [ 30.988217] ? security_mmap_addr+0x7d/0xa0 [ 30.988757] ? get_unmapped_area+0x1f5/0x3f0 [ 30.989309] do_mmap+0x854/0xf00 [ 30.989763] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.990261] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.990820] ksys_mmap_pgoff+0x3af/0x500 [ 30.991336] do_syscall_64+0x3f/0x90 [ 30.991821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.992477] RIP: 0033:0x7fef7bcbdd82 [ 30.992930] 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 [ 30.995105] RSP: 002b:00007fffe7351d58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.996030] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fef7bcbdd82 [ 30.996893] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fef7b0f7000 [ 30.997760] RBP: 00007fef7b0f7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.998611] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e74d692ec0 [ 30.999469] R13: 00007fffe7351d70 R14: 00007fffe7351da0 R15: 00007fffe7352100 [ 31.000331] [ 31.000629] [ 31.000843] Allocated by task 212: [ 31.001278] kasan_save_stack+0x22/0x50 [ 31.001812] kasan_set_track+0x25/0x30 [ 31.002317] __kasan_slab_alloc+0x59/0x70 [ 31.002861] kmem_cache_alloc+0x16b/0x370 [ 31.003380] vm_area_dup+0x20/0x160 [ 31.003836] __split_vma+0x170/0x950 [ 31.004309] split_vma+0xc6/0x110 [ 31.004751] mprotect_fixup+0x8d2/0xb30 [ 31.005259] do_mprotect_pkey+0x87e/0xd40 [ 31.005788] __x64_sys_mprotect+0x78/0xc0 [ 31.006322] do_syscall_64+0x3f/0x90 [ 31.006801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.007463] [ 31.007688] Freed by task 212: [ 31.008088] kasan_save_stack+0x22/0x50 [ 31.008597] kasan_set_track+0x25/0x30 [ 31.009098] kasan_save_free_info+0x2b/0x50 [ 31.009651] __kasan_slab_free+0x10a/0x190 [ 31.010196] kmem_cache_free+0x10d/0x4d0 [ 31.010710] rcu_core+0x8c8/0x2860 [ 31.011161] __do_softirq+0x1b7/0x7d4 [ 31.011643] [ 31.011856] Last potentially related work creation: [ 31.012453] kasan_save_stack+0x22/0x50 [ 31.012961] __kasan_record_aux_stack+0x8e/0xa0 [ 31.013543] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.014196] remove_vma+0x139/0x170 [ 31.014646] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.015207] do_vmi_munmap+0x1f1/0x2b0 [ 31.015696] __vm_munmap+0x138/0x3a0 [ 31.016165] __x64_sys_munmap+0x59/0x80 [ 31.016665] do_syscall_64+0x3f/0x90 [ 31.017138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.017787] [ 31.018010] Second to last potentially related work creation: [ 31.018707] kasan_save_stack+0x22/0x50 [ 31.019225] __kasan_record_aux_stack+0x8e/0xa0 [ 31.019802] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.020452] remove_vma+0x139/0x170 [ 31.020913] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.021474] do_vmi_munmap+0x1f1/0x2b0 [ 31.021976] mmap_region+0x1f9/0x2660 [ 31.022457] do_mmap+0x854/0xf00 [ 31.022888] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.023387] ksys_mmap_pgoff+0x3af/0x500 [ 31.023895] do_syscall_64+0x3f/0x90 [ 31.024366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.025003] [ 31.025227] The buggy address belongs to the object at ffff88800f079828 [ 31.025227] which belongs to the cache vm_area_struct of size 168 [ 31.026712] The buggy address is located 88 bytes inside of [ 31.026712] freed 168-byte region [ffff88800f079828, ffff88800f0798d0) [ 31.028154] [ 31.028368] The buggy address belongs to the physical page: [ 31.029039] page:0000000004833cb8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf079 [ 31.030152] memcg:ffff88800980f301 [ 31.030587] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.031235] page_type: 0xffffffff() [ 31.031693] raw: 0100000000000200 ffff8880087a0c80 ffffea0000384e80 dead000000000002 [ 31.032618] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800980f301 [ 31.033542] page dumped because: kasan: bad access detected [ 31.034240] [ 31.034462] Memory state around the buggy address: [ 31.035050] ffff88800f079780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.035917] ffff88800f079800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.036783] >ffff88800f079880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.037668] ^ [ 31.038092] ffff88800f079900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.038950] ffff88800f079980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.039836] ================================================================== [ 31.040967] Disabling lock debugging due to kernel taint [ 32.954230] BUG: Bad rss-counter state mm:000000006a5c8929 type:MM_FILEPAGES val:33 [ 32.955404] BUG: Bad rss-counter state mm:000000006a5c8929 type:MM_ANONPAGES val:22 [ 33.424128] BUG: Bad rss-counter state mm:00000000a19855d7 type:MM_FILEPAGES val:33 [ 33.425180] BUG: Bad rss-counter state mm:00000000a19855d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3944' (ECDSA) to the list of known hosts. 2023/06/21 07:25:03 fuzzer started 2023/06/21 07:25:03 dialing manager at localhost:36067 2023/06/21 07:25:03 checking machine... 2023/06/21 07:25:03 checking revisions... [ 34.168429] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:25:04 testing simple program... [ 34.214512] cgroup: Unknown subsys name 'net' [ 34.265563] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:25:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=1ffffffff0ba7530 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f61d8e7c19d RSP=ffff88806ce09a00 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f61d8e7c000 R11=00000000000b6a61 R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff88800d938000 R15=ffff88800c57a980 RIP=ffffffff8135b960 RFL=00000216 [----AP-] 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 00007f61d85b2900 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=00007f61d79cde90 CR3=000000000c560000 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=938d57d637e289af8f4ca44102eda929 XMM02=eff9b2d0a8fce9cb0000000000119c70 XMM03=2c67c8bc2e329bc30000000000119d98 XMM04=7d554df62c840e7100000000000ae988 XMM05=1fb013ef3b8078e500000000001335c8 XMM06=dfcdbad4f1609c370000000000132480 XMM07=fb795ef6d65770560000000000121008 XMM08=2c67c8bc2e329bc30000000000119d98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffffffff87f97640 RCX=0000000000000000 RDX=ffff8880158b51c0 RSI=ffffffff83c60be5 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800fcb76a0 R8 =0000000000000005 R9 =00000000000000ff R10=000000000000001d R11=00000a7600000a76 R12=0000000000000000 R13=000000000000001d R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c086b 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 00007fb703c59900 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=00007ffef9417000 CR3=0000000019d7e000 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=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000