syzkaller login: [ 81.833668] BUG: Bad rss-counter state mm:00000000a65fee7b type:MM_FILEPAGES val:33 [ 81.835379] BUG: Bad rss-counter state mm:00000000a65fee7b type:MM_ANONPAGES val:22 [ 82.005047] ================================================================== [ 82.006129] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 82.007323] Read of size 8 at addr ffff88800ecc2968 by task sshd/219 [ 82.008076] [ 82.008290] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 82.009293] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 82.010255] Call Trace: [ 82.010568] [ 82.010846] dump_stack_lvl+0x91/0xf0 [ 82.011331] print_report+0xcc/0x620 [ 82.011811] ? __virt_addr_valid+0x102/0x340 [ 82.012349] ? vma_interval_tree_remove+0xc75/0xec0 [ 82.012955] ? vma_interval_tree_remove+0xc75/0xec0 [ 82.013568] kasan_report+0xbe/0xf0 [ 82.014038] ? vma_interval_tree_remove+0xc75/0xec0 [ 82.014656] vma_interval_tree_remove+0xc75/0xec0 [ 82.015242] vma_prepare+0xc54/0x11a0 [ 82.015712] __split_vma+0x5af/0x950 [ 82.016179] ? __pfx___split_vma+0x10/0x10 [ 82.016699] ? find_held_lock+0x2c/0x110 [ 82.017206] do_vmi_align_munmap+0x2ba/0x11f0 [ 82.017764] ? lock_is_held_type+0x9f/0x120 [ 82.018315] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 82.018913] ? mtree_range_walk+0x632/0x900 [ 82.019457] ? mas_walk+0x5c7/0x7c0 [ 82.019923] do_vmi_munmap+0x1f1/0x2b0 [ 82.020408] mmap_region+0x1f9/0x2660 [ 82.020883] ? vm_mmap_pgoff+0x15c/0x3a0 [ 82.021382] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 82.022086] ? __pfx_lock_acquire+0x10/0x10 [ 82.022622] ? __pfx_mmap_region+0x10/0x10 [ 82.023149] ? security_mmap_addr+0x7d/0xa0 [ 82.023673] ? get_unmapped_area+0x1f5/0x3f0 [ 82.024214] do_mmap+0x854/0xf00 [ 82.024648] vm_mmap_pgoff+0x1a6/0x3a0 [ 82.025140] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 82.025691] ksys_mmap_pgoff+0x3af/0x500 [ 82.026207] do_syscall_64+0x3f/0x90 [ 82.026679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.027319] RIP: 0033:0x7f03e2371d82 [ 82.027772] 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 [ 82.029849] RSP: 002b:00007fff5d2e6478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 82.030745] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f03e2371d82 [ 82.031583] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f03e17ab000 [ 82.032421] RBP: 00007f03e17ab000 R08: 0000000000000009 R09: 0000000000001000 [ 82.033252] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636b9189ec0 [ 82.034086] R13: 00007fff5d2e6490 R14: 00007fff5d2e64c0 R15: 00007fff5d2e6820 [ 82.034938] [ 82.035233] [ 82.035445] Allocated by task 212: [ 82.035869] kasan_save_stack+0x22/0x50 [ 82.036365] kasan_set_track+0x25/0x30 [ 82.036849] __kasan_slab_alloc+0x59/0x70 [ 82.037364] kmem_cache_alloc+0x16b/0x370 [ 82.037876] vm_area_dup+0x20/0x160 [ 82.038329] __split_vma+0x170/0x950 [ 82.038789] split_vma+0xc6/0x110 [ 82.039226] mprotect_fixup+0x8d2/0xb30 [ 82.039720] do_mprotect_pkey+0x87e/0xd40 [ 82.040238] __x64_sys_mprotect+0x78/0xc0 [ 82.040753] do_syscall_64+0x3f/0x90 [ 82.041219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.041848] [ 82.042060] Freed by task 212: [ 82.042460] kasan_save_stack+0x22/0x50 [ 82.042961] kasan_set_track+0x25/0x30 [ 82.043456] kasan_save_free_info+0x2b/0x50 [ 82.043984] __kasan_slab_free+0x10a/0x190 [ 82.044511] kmem_cache_free+0x10d/0x4d0 [ 82.045006] rcu_core+0x8c8/0x2860 [ 82.045445] __do_softirq+0x1b7/0x7d4 [ 82.045915] [ 82.046127] Last potentially related work creation: [ 82.046723] kasan_save_stack+0x22/0x50 [ 82.047215] __kasan_record_aux_stack+0x8e/0xa0 [ 82.047782] __call_rcu_common.constprop.0+0x6a/0xb90 [ 82.048422] remove_vma+0x139/0x170 [ 82.048868] do_vmi_align_munmap+0xd4a/0x11f0 [ 82.049417] do_vmi_munmap+0x1f1/0x2b0 [ 82.049894] __vm_munmap+0x138/0x3a0 [ 82.050361] __x64_sys_munmap+0x59/0x80 [ 82.050851] do_syscall_64+0x3f/0x90 [ 82.051321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.051950] [ 82.052165] Second to last potentially related work creation: [ 82.052839] kasan_save_stack+0x22/0x50 [ 82.053331] __kasan_record_aux_stack+0x8e/0xa0 [ 82.053898] __call_rcu_common.constprop.0+0x6a/0xb90 [ 82.054546] remove_vma+0x139/0x170 [ 82.054995] do_vmi_align_munmap+0xd4a/0x11f0 [ 82.055539] do_vmi_munmap+0x1f1/0x2b0 [ 82.056018] mmap_region+0x1f9/0x2660 [ 82.056487] do_mmap+0x854/0xf00 [ 82.056915] vm_mmap_pgoff+0x1a6/0x3a0 [ 82.057401] ksys_mmap_pgoff+0x3af/0x500 [ 82.057894] do_syscall_64+0x3f/0x90 [ 82.058373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.059006] [ 82.059220] The buggy address belongs to the object at ffff88800ecc2910 [ 82.059220] which belongs to the cache vm_area_struct of size 168 [ 82.060660] The buggy address is located 88 bytes inside of [ 82.060660] freed 168-byte region [ffff88800ecc2910, ffff88800ecc29b8) [ 82.062044] [ 82.062264] The buggy address belongs to the physical page: [ 82.062910] page:00000000155950a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecc2 [ 82.063979] memcg:ffff88800e671e01 [ 82.064400] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 82.065091] page_type: 0xffffffff() [ 82.065530] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 82.066449] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e671e01 [ 82.067336] page dumped because: kasan: bad access detected [ 82.067989] [ 82.068208] Memory state around the buggy address: [ 82.068773] ffff88800ecc2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 82.069616] ffff88800ecc2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 82.070465] >ffff88800ecc2900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 82.071309] ^ [ 82.072080] ffff88800ecc2980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 82.072922] ffff88800ecc2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 82.073767] ================================================================== [ 82.074739] Disabling lock debugging due to kernel taint [ 83.783623] BUG: Bad rss-counter state mm:000000004dc157fc type:MM_FILEPAGES val:33 [ 83.784617] BUG: Bad rss-counter state mm:000000004dc157fc type:MM_ANONPAGES val:22 [ 84.239625] BUG: Bad rss-counter state mm:00000000c2fb96fb type:MM_FILEPAGES val:33 [ 84.240781] BUG: Bad rss-counter state mm:00000000c2fb96fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65157' (ECDSA) to the list of known hosts. 2023/06/19 13:28:06 fuzzer started 2023/06/19 13:28:07 dialing manager at localhost:44161 2023/06/19 13:28:07 checking machine... 2023/06/19 13:28:07 checking revisions... [ 84.934137] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:28:07 testing simple program... [ 84.971253] cgroup: Unknown subsys name 'net' [ 85.020506] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:27:13 Registers: info registers vcpu 0 RAX=ffff888009a26130 RBX=ffff888009a265f0 RCX=00000000800d000a RDX=00000000800d000b RSI=ffff888009a265f0 RDI=ffff88800844f780 RBP=ffff888019f6fa28 RSP=ffff888019f6f990 R8 =00000000800d000a R9 =0000000000000000 R10=ffffea0000268980 R11=00000000800d000b R12=ffffea0000268980 R13=ffff888009a26130 R14=00000000800d000a R15=ffff88800844f780 RIP=ffffffff818095bf RFL=00000242 [---Z---] 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 00007fcedbcea900 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=00007ffd86631000 CR3=000000000caf4000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007f5ad2e141c0 CR3=000000000ca36000 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=133ceeb9caa197ab4a40d31b0245665a XMM02=2c67c8bc2e329bc30000000000123fb8 XMM03=fb795ef6d65770560000000000127f00 XMM04=4e18fdbfcf747abb00000000000ae988 XMM05=e4cb8bb95a7664b60000000000139bc8 XMM06=497aec159fbf096b0000000000138a30 XMM07=e042d86d42eb936e00000000001281d8 XMM08=452751cfadc832400000000000124018 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000