[ 23.825164] BUG: Bad rss-counter state mm:000000005136557f type:MM_FILEPAGES val:33 [ 23.826539] BUG: Bad rss-counter state mm:000000005136557f type:MM_ANONPAGES val:22 [ 23.963542] ================================================================== [ 23.964491] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.965440] Read of size 8 at addr ffff88800968ab38 by task sshd/218 [ 23.966209] [ 23.966433] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.967385] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.968378] Call Trace: [ 23.968704] [ 23.969002] dump_stack_lvl+0x91/0xf0 [ 23.969493] print_report+0xcc/0x620 [ 23.969975] ? __virt_addr_valid+0x102/0x340 [ 23.970527] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.971138] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.971748] kasan_report+0xbe/0xf0 [ 23.972257] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.972874] vma_interval_tree_remove+0xc75/0xec0 [ 23.973504] vma_prepare+0xc54/0x11a0 [ 23.974006] __split_vma+0x5af/0x950 [ 23.974495] ? __pfx___split_vma+0x10/0x10 [ 23.975052] ? find_held_lock+0x2c/0x110 [ 23.975593] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.976194] ? lock_is_held_type+0x9f/0x120 [ 23.976747] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.977375] ? mtree_range_walk+0x632/0x900 [ 23.977949] ? mas_walk+0x5c7/0x7c0 [ 23.978446] do_vmi_munmap+0x1f1/0x2b0 [ 23.978951] mmap_region+0x1f9/0x2660 [ 23.979454] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.979995] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.980737] ? __pfx_lock_acquire+0x10/0x10 [ 23.981295] ? __pfx_mmap_region+0x10/0x10 [ 23.981846] ? security_mmap_addr+0x7d/0xa0 [ 23.982387] ? get_unmapped_area+0x1f5/0x3f0 [ 23.982946] do_mmap+0x854/0xf00 [ 23.983401] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.983921] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.984511] ksys_mmap_pgoff+0x3af/0x500 [ 23.985040] do_syscall_64+0x3f/0x90 [ 23.985531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.986208] RIP: 0033:0x7fe53d5a7d82 [ 23.986685] 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 [ 23.988913] RSP: 002b:00007ffe8961c228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.989856] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe53d5a7d82 [ 23.990741] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe53c9e1000 [ 23.991618] RBP: 00007fe53c9e1000 R08: 0000000000000009 R09: 0000000000001000 [ 23.992505] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565252b3cb20 [ 23.993386] R13: 00007ffe8961c240 R14: 00007ffe8961c270 R15: 00007ffe8961c5d0 [ 23.994278] [ 23.994584] [ 23.994808] Allocated by task 211: [ 23.995255] kasan_save_stack+0x22/0x50 [ 23.995777] kasan_set_track+0x25/0x30 [ 23.996297] __kasan_slab_alloc+0x59/0x70 [ 23.996843] kmem_cache_alloc+0x16b/0x370 [ 23.997380] vm_area_dup+0x20/0x160 [ 23.997852] __split_vma+0x170/0x950 [ 23.998335] split_vma+0xc6/0x110 [ 23.998792] mprotect_fixup+0x8d2/0xb30 [ 23.999312] do_mprotect_pkey+0x87e/0xd40 [ 23.999850] __x64_sys_mprotect+0x78/0xc0 [ 24.000412] do_syscall_64+0x3f/0x90 [ 24.000910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.001575] [ 24.001801] Freed by task 211: [ 24.002212] kasan_save_stack+0x22/0x50 [ 24.002740] kasan_set_track+0x25/0x30 [ 24.003250] kasan_save_free_info+0x2b/0x50 [ 24.003810] __kasan_slab_free+0x10a/0x190 [ 24.004377] kmem_cache_free+0x10d/0x4d0 [ 24.004914] rcu_core+0x8c8/0x2860 [ 24.005377] __do_softirq+0x1b7/0x7d4 [ 24.005877] [ 24.006100] Last potentially related work creation: [ 24.006707] kasan_save_stack+0x22/0x50 [ 24.007237] __kasan_record_aux_stack+0x8e/0xa0 [ 24.007834] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.008519] remove_vma+0x139/0x170 [ 24.008991] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.009572] do_vmi_munmap+0x1f1/0x2b0 [ 24.010076] __vm_munmap+0x138/0x3a0 [ 24.010557] __x64_sys_munmap+0x59/0x80 [ 24.011074] do_syscall_64+0x3f/0x90 [ 24.011568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.012267] [ 24.012491] Second to last potentially related work creation: [ 24.013198] kasan_save_stack+0x22/0x50 [ 24.013714] __kasan_record_aux_stack+0x8e/0xa0 [ 24.014316] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.014977] remove_vma+0x139/0x170 [ 24.015444] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.016028] do_vmi_munmap+0x1f1/0x2b0 [ 24.016529] mmap_region+0x1f9/0x2660 [ 24.017028] do_mmap+0x854/0xf00 [ 24.017475] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.017977] ksys_mmap_pgoff+0x3af/0x500 [ 24.018498] do_syscall_64+0x3f/0x90 [ 24.018990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.019661] [ 24.019883] The buggy address belongs to the object at ffff88800968aae0 [ 24.019883] which belongs to the cache vm_area_struct of size 168 [ 24.021434] The buggy address is located 88 bytes inside of [ 24.021434] freed 168-byte region [ffff88800968aae0, ffff88800968ab88) [ 24.022899] [ 24.023125] The buggy address belongs to the physical page: [ 24.023811] page:0000000012b83bcf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x968a [ 24.024945] memcg:ffff88800dd11e01 [ 24.025390] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.026115] page_type: 0xffffffff() [ 24.026582] raw: 0100000000000200 ffff8880087a0c80 ffffea000038ae40 dead000000000005 [ 24.027545] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd11e01 [ 24.028501] page dumped because: kasan: bad access detected [ 24.029191] [ 24.029411] Memory state around the buggy address: [ 24.030017] ffff88800968aa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.030904] ffff88800968aa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 24.031799] >ffff88800968ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.032702] ^ [ 24.033337] ffff88800968ab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.034234] ffff88800968ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.035137] ================================================================== [ 24.036177] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.195780] BUG: Bad rss-counter state mm:0000000042821daa type:MM_FILEPAGES val:33 [ 26.197092] BUG: Bad rss-counter state mm:0000000042821daa type:MM_ANONPAGES val:22 [ 26.669688] BUG: Bad rss-counter state mm:00000000fa644be7 type:MM_FILEPAGES val:33 [ 26.670619] BUG: Bad rss-counter state mm:00000000fa644be7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8276' (ECDSA) to the list of known hosts. 2023/06/21 01:12:30 fuzzer started 2023/06/21 01:12:31 dialing manager at localhost:36067 2023/06/21 01:12:31 checking machine... 2023/06/21 01:12:31 checking revisions... [ 27.402155] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:12:31 testing simple program... [ 27.449970] cgroup: Unknown subsys name 'net' [ 27.492142] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:12:30 Registers: info registers vcpu 0 RAX=00000000fbad2488 RBX=000055e4b296ef80 RCX=0000000000000c00 RDX=000055e4b297ded0 RSI=0000000000002023 RDI=000055e4b296ef80 RBP=00007fff7a80f2e0 RSP=00007fff7a80f230 R8 =000055e4b297decd R9 =00007f7eb507dbe0 R10=0000000000400000 R11=0000000000000246 R12=0000000000000003 R13=0000000000000000 R14=0000000000000003 R15=0000000000000000 RIP=00007f7eb4f40761 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7eb4acb900 00000000 00000000 GS =0000 0000000000000000 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=00007f7eb5080650 CR3=000000000e25e000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=7720656c62697461706d6f63206d6874 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=706d6f63206d687469726f676c612023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff8617f7d6 RDX=0000000000000008 RSI=ffff888016637ac0 RDI=ffff888016637630 RBP=ffff888016637688 RSP=ffff8880166375c0 R8 =ffffffff8617f7da R9 =ffff888016637670 R10=0000000000038001 R11=000000000002c9cc R12=ffff888016637690 R13=ffff888016637678 R14=ffff888016637ac8 R15=ffff888016637630 RIP=ffffffff81131023 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 00007f039eb8e700 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=000055e4b297b818 CR3=0000000009bf6000 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=2030333a32313a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a32313a3130203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000