[ 56.737913] BUG: Bad rss-counter state mm:00000000d6647b6f type:MM_FILEPAGES val:33 [ 56.739290] BUG: Bad rss-counter state mm:00000000d6647b6f type:MM_ANONPAGES val:22 [ 56.778067] ================================================================== [ 56.779064] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.779993] Read of size 8 at addr ffff88801a06f3f8 by task sshd/227 [ 56.780783] [ 56.781002] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 56.781867] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.782870] Call Trace: [ 56.783198] [ 56.783481] dump_stack_lvl+0x91/0xf0 [ 56.783969] print_report+0xcc/0x620 [ 56.784466] ? __virt_addr_valid+0x102/0x340 [ 56.785008] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.785625] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.786244] kasan_report+0xbe/0xf0 [ 56.786725] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.787348] vma_interval_tree_remove+0xc75/0xec0 [ 56.787950] vma_prepare+0xc54/0x11a0 [ 56.788437] __split_vma+0x5af/0x950 [ 56.788907] ? __pfx___split_vma+0x10/0x10 [ 56.789433] ? find_held_lock+0x2c/0x110 [ 56.789981] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.790559] ? lock_is_held_type+0x9f/0x120 [ 56.791108] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.791724] ? mtree_range_walk+0x632/0x900 [ 56.792293] ? mas_walk+0x5c7/0x7c0 [ 56.792777] do_vmi_munmap+0x1f1/0x2b0 [ 56.793287] mmap_region+0x1f9/0x2660 [ 56.793783] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.794334] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.795059] ? __pfx_lock_acquire+0x10/0x10 [ 56.795597] ? __pfx_mmap_region+0x10/0x10 [ 56.796138] ? security_mmap_addr+0x7d/0xa0 [ 56.796680] ? get_unmapped_area+0x1f5/0x3f0 [ 56.797243] do_mmap+0x854/0xf00 [ 56.797691] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.798205] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.798786] ksys_mmap_pgoff+0x3af/0x500 [ 56.799306] do_syscall_64+0x3f/0x90 [ 56.799795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.800457] RIP: 0033:0x7f75dd769d82 [ 56.800921] 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 [ 56.803098] RSP: 002b:00007ffc84407268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.804002] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75dd769d82 [ 56.804876] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f75dcba3000 [ 56.805879] RBP: 00007f75dcba3000 R08: 0000000000000009 R09: 0000000000001000 [ 56.806752] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aaf08f9ec0 [ 56.807631] R13: 00007ffc84407280 R14: 00007ffc844072b0 R15: 00007ffc84407610 [ 56.808504] [ 56.808798] [ 56.809013] Allocated by task 220: [ 56.809442] kasan_save_stack+0x22/0x50 [ 56.809953] kasan_set_track+0x25/0x30 [ 56.810446] __kasan_slab_alloc+0x59/0x70 [ 56.810972] kmem_cache_alloc+0x16b/0x370 [ 56.811489] vm_area_dup+0x20/0x160 [ 56.811942] __split_vma+0x170/0x950 [ 56.812410] split_vma+0xc6/0x110 [ 56.812852] mprotect_fixup+0x8d2/0xb30 [ 56.813355] do_mprotect_pkey+0x87e/0xd40 [ 56.813878] __x64_sys_mprotect+0x78/0xc0 [ 56.814425] do_syscall_64+0x3f/0x90 [ 56.814902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.815547] [ 56.815764] Freed by task 220: [ 56.816156] kasan_save_stack+0x22/0x50 [ 56.816660] kasan_set_track+0x25/0x30 [ 56.817155] kasan_save_free_info+0x2b/0x50 [ 56.817691] __kasan_slab_free+0x10a/0x190 [ 56.818241] kmem_cache_free+0x10d/0x4d0 [ 56.818763] rcu_core+0x8c8/0x2860 [ 56.819212] __do_softirq+0x1b7/0x7d4 [ 56.819710] [ 56.819928] Last potentially related work creation: [ 56.820523] kasan_save_stack+0x22/0x50 [ 56.821032] __kasan_record_aux_stack+0x8e/0xa0 [ 56.821616] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.822293] remove_vma+0x139/0x170 [ 56.822750] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.823318] do_vmi_munmap+0x1f1/0x2b0 [ 56.823814] __vm_munmap+0x138/0x3a0 [ 56.824287] __x64_sys_munmap+0x59/0x80 [ 56.824804] do_syscall_64+0x3f/0x90 [ 56.825294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.825965] [ 56.826189] The buggy address belongs to the object at ffff88801a06f3a0 [ 56.826189] which belongs to the cache vm_area_struct of size 168 [ 56.827692] The buggy address is located 88 bytes inside of [ 56.827692] freed 168-byte region [ffff88801a06f3a0, ffff88801a06f448) [ 56.829106] [ 56.829321] The buggy address belongs to the physical page: [ 56.829993] page:000000006b6a6104 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a06f [ 56.831084] memcg:ffff8880100dd701 [ 56.831514] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.832182] page_type: 0xffffffff() [ 56.832651] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 56.833564] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880100dd701 [ 56.834477] page dumped because: kasan: bad access detected [ 56.835138] [ 56.835352] Memory state around the buggy address: [ 56.835927] ffff88801a06f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 56.836790] ffff88801a06f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 56.837663] >ffff88801a06f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 56.838527] ^ [ 56.839363] ffff88801a06f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 56.840233] ffff88801a06f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.841080] ================================================================== [ 56.842214] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 59.057746] BUG: Bad rss-counter state mm:00000000c510ccbe type:MM_FILEPAGES val:33 [ 59.058339] BUG: Bad rss-counter state mm:00000000c510ccbe type:MM_ANONPAGES val:22 [ 59.523390] BUG: Bad rss-counter state mm:000000004ca19a28 type:MM_FILEPAGES val:33 [ 59.524576] BUG: Bad rss-counter state mm:000000004ca19a28 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2828' (ECDSA) to the list of known hosts. 2023/06/20 22:11:08 fuzzer started 2023/06/20 22:11:08 dialing manager at localhost:36067 2023/06/20 22:11:08 checking machine... 2023/06/20 22:11:08 checking revisions... [ 60.300911] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:11:08 testing simple program... [ 60.354729] cgroup: Unknown subsys name 'net' [ 60.407855] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:11:08 Registers: info registers vcpu 0 RAX=1ffffffff0ff2ed1 RBX=ffff888009a3d430 RCX=ffffffff83ab193d RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff87f9768c RBP=000000005a6c4173 RSP=ffff8880183df508 R8 =0000000000000000 R9 =fffffbfff0ff2fc8 R10=ffffffff87f97e43 R11=0000095e0000095e R12=0000000000000000 R13=0000000000000086 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab1978 RFL=00000217 [----APC] 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 00007fec9c72e900 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=00007ffeb2a5c000 CR3=000000000d80a000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fc44e7e5ac0 CR3=000000000d56a000 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=c6b24194daf982afeb4e7ee7e92996be XMM02=ec2efd57dc4c00df000000000011a3f8 XMM03=f6813a93350d64f5000000000011a4c8 XMM04=18133e101899e42400000000000ae988 XMM05=a258bd65d9fad8ce0000000000131b88 XMM06=e8008b1642ea3e6000000000001308b8 XMM07=e042d86d42eb936e0000000000121088 XMM08=f6813a93350d64f5000000000011a4c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000