[ 24.811678] sshd (213) used greatest stack depth: 23992 bytes left [ 24.813829] BUG: Bad rss-counter state mm:000000000546e8e5 type:MM_FILEPAGES val:33 [ 24.815768] BUG: Bad rss-counter state mm:000000000546e8e5 type:MM_ANONPAGES val:22 [ 24.966879] ================================================================== [ 24.967794] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.968823] Read of size 8 at addr ffff88800ff38d08 by task sshd/220 [ 24.969584] [ 24.969799] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.970650] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.971658] Call Trace: [ 24.971978] [ 24.972296] dump_stack_lvl+0x91/0xf0 [ 24.972779] print_report+0xcc/0x620 [ 24.973265] ? __virt_addr_valid+0x102/0x340 [ 24.973806] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.974427] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.975036] kasan_report+0xbe/0xf0 [ 24.975516] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.976144] vma_interval_tree_remove+0xc75/0xec0 [ 24.976745] vma_prepare+0xc54/0x11a0 [ 24.977223] __split_vma+0x5af/0x950 [ 24.977695] ? __pfx___split_vma+0x10/0x10 [ 24.978226] ? find_held_lock+0x2c/0x110 [ 24.978745] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.979310] ? lock_is_held_type+0x9f/0x120 [ 24.979844] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.980459] ? mtree_range_walk+0x632/0x900 [ 24.981007] ? mas_walk+0x5c7/0x7c0 [ 24.981479] do_vmi_munmap+0x1f1/0x2b0 [ 24.981971] mmap_region+0x1f9/0x2660 [ 24.982451] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.982959] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.983671] ? __pfx_lock_acquire+0x10/0x10 [ 24.984221] ? __pfx_mmap_region+0x10/0x10 [ 24.984753] ? security_mmap_addr+0x7d/0xa0 [ 24.985283] ? get_unmapped_area+0x1f5/0x3f0 [ 24.985828] do_mmap+0x854/0xf00 [ 24.986268] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.986763] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.987319] ksys_mmap_pgoff+0x3af/0x500 [ 24.987824] do_syscall_64+0x3f/0x90 [ 24.988309] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.988958] RIP: 0033:0x7f8f3e929d82 [ 24.989417] 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 [ 24.991540] RSP: 002b:00007fffc4fa0fa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.992459] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f3e929d82 [ 24.993308] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f3dd63000 [ 24.994149] RBP: 00007f8f3dd63000 R08: 0000000000000009 R09: 0000000000001000 [ 24.994992] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c59e94eec0 [ 24.995836] R13: 00007fffc4fa0fc0 R14: 00007fffc4fa0ff0 R15: 00007fffc4fa1350 [ 24.996706] [ 24.996999] [ 24.997212] Allocated by task 213: [ 24.997642] kasan_save_stack+0x22/0x50 [ 24.998148] kasan_set_track+0x25/0x30 [ 24.998640] __kasan_slab_alloc+0x59/0x70 [ 24.999158] kmem_cache_alloc+0x16b/0x370 [ 24.999673] vm_area_dup+0x20/0x160 [ 25.000136] __split_vma+0x170/0x950 [ 25.000600] split_vma+0xc6/0x110 [ 25.001034] mprotect_fixup+0x8d2/0xb30 [ 25.001540] do_mprotect_pkey+0x87e/0xd40 [ 25.002060] __x64_sys_mprotect+0x78/0xc0 [ 25.002581] do_syscall_64+0x3f/0x90 [ 25.003049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.003693] [ 25.003910] Freed by task 213: [ 25.004310] kasan_save_stack+0x22/0x50 [ 25.004811] kasan_set_track+0x25/0x30 [ 25.005297] kasan_save_free_info+0x2b/0x50 [ 25.005823] __kasan_slab_free+0x10a/0x190 [ 25.006351] kmem_cache_free+0x10d/0x4d0 [ 25.006854] rcu_core+0x8c8/0x2860 [ 25.007295] __do_softirq+0x1b7/0x7d4 [ 25.007777] [ 25.007993] Last potentially related work creation: [ 25.008591] kasan_save_stack+0x22/0x50 [ 25.009129] __kasan_record_aux_stack+0x8e/0xa0 [ 25.009747] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.010448] remove_vma+0x139/0x170 [ 25.010938] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.011531] do_vmi_munmap+0x1f1/0x2b0 [ 25.012056] __vm_munmap+0x138/0x3a0 [ 25.012570] __x64_sys_munmap+0x59/0x80 [ 25.013110] do_syscall_64+0x3f/0x90 [ 25.013624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.014328] [ 25.014562] Second to last potentially related work creation: [ 25.015323] kasan_save_stack+0x22/0x50 [ 25.015871] __kasan_record_aux_stack+0x8e/0xa0 [ 25.016501] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.017189] remove_vma+0x139/0x170 [ 25.017672] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.018264] do_vmi_munmap+0x1f1/0x2b0 [ 25.018776] mmap_region+0x1f9/0x2660 [ 25.019283] do_mmap+0x854/0xf00 [ 25.019732] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.020261] ksys_mmap_pgoff+0x3af/0x500 [ 25.020779] do_syscall_64+0x3f/0x90 [ 25.021278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.021948] [ 25.022169] The buggy address belongs to the object at ffff88800ff38cb0 [ 25.022169] which belongs to the cache vm_area_struct of size 168 [ 25.023715] The buggy address is located 88 bytes inside of [ 25.023715] freed 168-byte region [ffff88800ff38cb0, ffff88800ff38d58) [ 25.025192] [ 25.025420] The buggy address belongs to the physical page: [ 25.026105] page:000000001f4d0d4e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xff38 [ 25.027227] memcg:ffff88800d444c01 [ 25.027679] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.028361] page_type: 0xffffffff() [ 25.028835] raw: 0100000000000200 ffff88800879fc80 ffffea00003bda00 dead000000000006 [ 25.029797] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d444c01 [ 25.030746] page dumped because: kasan: bad access detected [ 25.031440] [ 25.031663] Memory state around the buggy address: [ 25.032286] ffff88800ff38c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 25.033206] ffff88800ff38c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 25.034101] >ffff88800ff38d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 25.035002] ^ [ 25.035463] ffff88800ff38d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.036394] ffff88800ff38e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 25.037295] ================================================================== [ 25.038341] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.830317] BUG: Bad rss-counter state mm:000000000333d41d type:MM_FILEPAGES val:33 [ 26.831501] BUG: Bad rss-counter state mm:000000000333d41d type:MM_ANONPAGES val:22 [ 27.235743] BUG: Bad rss-counter state mm:00000000d680c6ef type:MM_FILEPAGES val:33 [ 27.237131] BUG: Bad rss-counter state mm:00000000d680c6ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47158' (ECDSA) to the list of known hosts. 2023/06/19 23:17:55 fuzzer started 2023/06/19 23:17:56 dialing manager at localhost:44161 2023/06/19 23:17:56 checking machine... 2023/06/19 23:17:56 checking revisions... [ 27.968832] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:17:56 testing simple program... [ 28.018929] cgroup: Unknown subsys name 'net' [ 28.081279] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:17:54 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=00007fc4f8c21d20 CR3=000000000d72a000 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=474eaebe89270283bd47e0861097ccee XMM02=2c67c8bc2e329bc3000000000011e3c8 XMM03=fb795ef6d65770560000000000124a80 XMM04=c12e29f7314e693200000000000ae988 XMM05=19e9129bd510f2350000000000135900 XMM06=4fda316b135da52b0000000000135788 XMM07=e042d86d42eb936e0000000000124d58 XMM08=6af03002dce73aeb000000000011e428 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888015921b40 RSI=0000000000000008 RDI=ffffffff8560b640 RBP=1ffff11003950e8a RSP=ffff88801ca87440 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=000008c1000008c1 R12=ffffffff8560b640 R13=ffffffff83ab421f R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff812d8689 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 00007f5d55091900 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=00007ffedf515000 CR3=000000000d654000 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