syzkaller login: [ 103.804810] BUG: Bad rss-counter state mm:00000000434557a6 type:MM_FILEPAGES val:33 [ 103.806498] BUG: Bad rss-counter state mm:00000000434557a6 type:MM_ANONPAGES val:22 [ 103.954310] ================================================================== [ 103.955378] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 103.956531] Read of size 8 at addr ffff88800d5b0880 by task sshd/220 [ 103.957579] [ 103.957838] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 103.959058] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 103.960089] Call Trace: [ 103.960405] [ 103.960677] dump_stack_lvl+0x91/0xf0 [ 103.961147] print_report+0xcc/0x620 [ 103.961616] ? __virt_addr_valid+0x102/0x340 [ 103.962143] ? vma_interval_tree_remove+0xc75/0xec0 [ 103.962727] ? vma_interval_tree_remove+0xc75/0xec0 [ 103.963316] kasan_report+0xbe/0xf0 [ 103.963771] ? vma_interval_tree_remove+0xc75/0xec0 [ 103.964406] vma_interval_tree_remove+0xc75/0xec0 [ 103.965002] vma_prepare+0xc54/0x11a0 [ 103.965488] __split_vma+0x5af/0x950 [ 103.965948] ? __pfx___split_vma+0x10/0x10 [ 103.966463] ? find_held_lock+0x2c/0x110 [ 103.966979] do_vmi_align_munmap+0x2ba/0x11f0 [ 103.967538] ? lock_is_held_type+0x9f/0x120 [ 103.968066] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 103.968690] ? mtree_range_walk+0x632/0x900 [ 103.969226] ? mas_walk+0x5c7/0x7c0 [ 103.969695] do_vmi_munmap+0x1f1/0x2b0 [ 103.970183] mmap_region+0x1f9/0x2660 [ 103.970656] ? vm_mmap_pgoff+0x15c/0x3a0 [ 103.971161] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 103.971860] ? __pfx_lock_acquire+0x10/0x10 [ 103.972396] ? __pfx_mmap_region+0x10/0x10 [ 103.972909] ? security_mmap_addr+0x7d/0xa0 [ 103.973433] ? get_unmapped_area+0x1f5/0x3f0 [ 103.973964] do_mmap+0x854/0xf00 [ 103.974395] vm_mmap_pgoff+0x1a6/0x3a0 [ 103.974882] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 103.975440] ksys_mmap_pgoff+0x3af/0x500 [ 103.975969] do_syscall_64+0x3f/0x90 [ 103.976551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 103.977185] RIP: 0033:0x7f5e10b07d82 [ 103.977639] 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 [ 103.979738] RSP: 002b:00007ffdb3738c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 103.980639] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e10b07d82 [ 103.981486] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e0ff41000 [ 103.982329] RBP: 00007f5e0ff41000 R08: 0000000000000009 R09: 0000000000001000 [ 103.983171] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562247785ec0 [ 103.984004] R13: 00007ffdb3738c20 R14: 00007ffdb3738c50 R15: 00007ffdb3738fb0 [ 103.984860] [ 103.985146] [ 103.985356] Allocated by task 213: [ 103.985783] kasan_save_stack+0x22/0x50 [ 103.986280] kasan_set_track+0x25/0x30 [ 103.986772] __kasan_slab_alloc+0x59/0x70 [ 103.987286] kmem_cache_alloc+0x16b/0x370 [ 103.987792] vm_area_dup+0x20/0x160 [ 103.988240] __split_vma+0x170/0x950 [ 103.988720] split_vma+0xc6/0x110 [ 103.989149] mprotect_fixup+0x8d2/0xb30 [ 103.989653] do_mprotect_pkey+0x87e/0xd40 [ 103.990170] __x64_sys_mprotect+0x78/0xc0 [ 103.990691] do_syscall_64+0x3f/0x90 [ 103.991163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 103.991793] [ 103.992009] Freed by task 213: [ 103.992410] kasan_save_stack+0x22/0x50 [ 103.992914] kasan_set_track+0x25/0x30 [ 103.993409] kasan_save_free_info+0x2b/0x50 [ 103.993933] __kasan_slab_free+0x10a/0x190 [ 103.994465] kmem_cache_free+0x10d/0x4d0 [ 103.994968] rcu_core+0x8c8/0x2860 [ 103.995406] __do_softirq+0x1b7/0x7d4 [ 103.995879] [ 103.996089] Last potentially related work creation: [ 103.996672] kasan_save_stack+0x22/0x50 [ 103.997165] __kasan_record_aux_stack+0x8e/0xa0 [ 103.997743] __call_rcu_common.constprop.0+0x6a/0xb90 [ 103.998502] remove_vma+0x139/0x170 [ 103.998940] do_vmi_align_munmap+0xd4a/0x11f0 [ 103.999492] do_vmi_munmap+0x1f1/0x2b0 [ 103.999977] __vm_munmap+0x138/0x3a0 [ 104.000455] __x64_sys_munmap+0x59/0x80 [ 104.000943] do_syscall_64+0x3f/0x90 [ 104.001410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 104.002048] [ 104.002259] Second to last potentially related work creation: [ 104.002933] kasan_save_stack+0x22/0x50 [ 104.003438] __kasan_record_aux_stack+0x8e/0xa0 [ 104.004010] __call_rcu_common.constprop.0+0x6a/0xb90 [ 104.004655] remove_vma+0x139/0x170 [ 104.005108] do_vmi_align_munmap+0xd4a/0x11f0 [ 104.005657] do_vmi_munmap+0x1f1/0x2b0 [ 104.006140] __vm_munmap+0x138/0x3a0 [ 104.006600] elf_map+0x26f/0x310 [ 104.007039] load_elf_binary+0x3417/0x5030 [ 104.007564] bprm_execve+0x803/0x1940 [ 104.008033] do_execveat_common+0x734/0x8e0 [ 104.008571] __x64_sys_execve+0x93/0xc0 [ 104.009062] do_syscall_64+0x3f/0x90 [ 104.009546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 104.010169] [ 104.010388] The buggy address belongs to the object at ffff88800d5b0828 [ 104.010388] which belongs to the cache vm_area_struct of size 168 [ 104.011851] The buggy address is located 88 bytes inside of [ 104.011851] freed 168-byte region [ffff88800d5b0828, ffff88800d5b08d0) [ 104.013236] [ 104.013448] The buggy address belongs to the physical page: [ 104.014098] page:00000000a3d53256 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5b0 [ 104.015165] memcg:ffff88800e45cb01 [ 104.015584] flags: 0x100000000000200(slab|node=0|zone=1) [ 104.016210] page_type: 0xffffffff() [ 104.016730] raw: 0100000000000200 ffff88800879fc80 ffffea000039ab80 dead000000000008 [ 104.017654] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e45cb01 [ 104.018548] page dumped because: kasan: bad access detected [ 104.019199] [ 104.019411] Memory state around the buggy address: [ 104.019976] ffff88800d5b0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 104.020831] ffff88800d5b0800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 104.021674] >ffff88800d5b0880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 104.022510] ^ [ 104.022909] ffff88800d5b0900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 104.023747] ffff88800d5b0980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 104.024591] ================================================================== [ 104.025596] Disabling lock debugging due to kernel taint [ 106.070624] BUG: Bad rss-counter state mm:00000000773f5397 type:MM_FILEPAGES val:33 [ 106.071612] BUG: Bad rss-counter state mm:00000000773f5397 type:MM_ANONPAGES val:22 [ 106.523957] BUG: Bad rss-counter state mm:00000000b6148550 type:MM_FILEPAGES val:33 [ 106.524958] BUG: Bad rss-counter state mm:00000000b6148550 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10103' (ECDSA) to the list of known hosts. 2023/06/20 06:03:51 fuzzer started 2023/06/20 06:03:51 dialing manager at localhost:44161 2023/06/20 06:03:52 checking machine... 2023/06/20 06:03:52 checking revisions... [ 107.259434] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:03:52 testing simple program... [ 107.310255] cgroup: Unknown subsys name 'net' [ 107.356104] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:02:38 Registers: info registers vcpu 0 RAX=ffffed10028b5211 RBX=ffff8880145a9000 RCX=ffffffff8364d1c3 RDX=ffffed10028b5211 RSI=0000000000000004 RDI=ffff8880145a9080 RBP=ffffed10028b5210 RSP=ffff88801471fd38 R8 =0000000000000001 R9 =ffffed10028b5210 R10=ffff8880145a9083 R11=00000000000b6996 R12=ffff8880145a93b8 R13=0000000000000000 R14=ffffffff87f94640 R15=0000000000000001 RIP=ffffffff8180efaf 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 00007f4ac1b63900 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=0000556c22074954 CR3=000000001c9ba000 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=00007f03bafa4c00 CR3=000000000ca9c000 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=5d2df4d5f53fa48f054080c55339f118 XMM02=000000000012cb08ec2efd57dc4c00df XMM03=0000000000133590c952b8ac39f2ea4c XMM04=dc64ccd546ebe3db00000000000ae988 XMM05=19e9129bd510f2350000000000144808 XMM06=4fda316b135da52b0000000000144690 XMM07=e042d86d42eb936e0000000000133810 XMM08=c952b8ac39f2ea4c000000000012cb68 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000