[ 26.324487] BUG: Bad rss-counter state mm:00000000be20b9ef type:MM_FILEPAGES val:33 [ 26.326113] BUG: Bad rss-counter state mm:00000000be20b9ef type:MM_ANONPAGES val:22 [ 26.489331] ================================================================== [ 26.490378] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.491504] Read of size 8 at addr ffff88801b94a310 by task sshd/219 [ 26.492379] [ 26.492596] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.493448] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.494440] Call Trace: [ 26.494757] [ 26.495053] dump_stack_lvl+0x91/0xf0 [ 26.495538] print_report+0xcc/0x620 [ 26.496019] ? __virt_addr_valid+0x102/0x340 [ 26.496559] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.497177] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.497786] kasan_report+0xbe/0xf0 [ 26.498268] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.498889] vma_interval_tree_remove+0xc75/0xec0 [ 26.499487] vma_prepare+0xc54/0x11a0 [ 26.499966] __split_vma+0x5af/0x950 [ 26.500435] ? __pfx___split_vma+0x10/0x10 [ 26.500961] ? find_held_lock+0x2c/0x110 [ 26.501481] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.502040] ? lock_is_held_type+0x9f/0x120 [ 26.502566] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.503187] ? mtree_range_walk+0x632/0x900 [ 26.503734] ? mas_walk+0x5c7/0x7c0 [ 26.504206] do_vmi_munmap+0x1f1/0x2b0 [ 26.504687] mmap_region+0x1f9/0x2660 [ 26.505167] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.505669] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.506379] ? __pfx_lock_acquire+0x10/0x10 [ 26.506906] ? __pfx_mmap_region+0x10/0x10 [ 26.507427] ? security_mmap_addr+0x7d/0xa0 [ 26.507949] ? get_unmapped_area+0x1f5/0x3f0 [ 26.508493] do_mmap+0x854/0xf00 [ 26.508925] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.509422] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.509987] ksys_mmap_pgoff+0x3af/0x500 [ 26.510492] do_syscall_64+0x3f/0x90 [ 26.510969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.511609] RIP: 0033:0x7fb58d312d82 [ 26.512060] 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 [ 26.514147] RSP: 002b:00007ffe56699528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.515218] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb58d312d82 [ 26.516244] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb58c74c000 [ 26.517261] RBP: 00007fb58c74c000 R08: 0000000000000009 R09: 0000000000001000 [ 26.518280] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a66813ec0 [ 26.519314] R13: 00007ffe56699540 R14: 00007ffe56699570 R15: 00007ffe566998d0 [ 26.520342] [ 26.520691] [ 26.520951] Allocated by task 211: [ 26.521466] kasan_save_stack+0x22/0x50 [ 26.522078] kasan_set_track+0x25/0x30 [ 26.522671] __kasan_slab_alloc+0x59/0x70 [ 26.523324] kmem_cache_alloc+0x16b/0x370 [ 26.523926] vm_area_dup+0x20/0x160 [ 26.524374] __split_vma+0x170/0x950 [ 26.524832] split_vma+0xc6/0x110 [ 26.525265] mprotect_fixup+0x8d2/0xb30 [ 26.525757] do_mprotect_pkey+0x87e/0xd40 [ 26.526266] __x64_sys_mprotect+0x78/0xc0 [ 26.526774] do_syscall_64+0x3f/0x90 [ 26.527246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.527878] [ 26.528093] Freed by task 211: [ 26.528482] kasan_save_stack+0x22/0x50 [ 26.528979] kasan_set_track+0x25/0x30 [ 26.529468] kasan_save_free_info+0x2b/0x50 [ 26.529986] __kasan_slab_free+0x10a/0x190 [ 26.530506] kmem_cache_free+0x10d/0x4d0 [ 26.531012] rcu_core+0x8c8/0x2860 [ 26.531453] __do_softirq+0x1b7/0x7d4 [ 26.531920] [ 26.532136] Last potentially related work creation: [ 26.532718] kasan_save_stack+0x22/0x50 [ 26.533211] __kasan_record_aux_stack+0x8e/0xa0 [ 26.533779] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.534413] remove_vma+0x139/0x170 [ 26.534871] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.535420] do_vmi_munmap+0x1f1/0x2b0 [ 26.535896] __vm_munmap+0x138/0x3a0 [ 26.536354] __x64_sys_munmap+0x59/0x80 [ 26.536843] do_syscall_64+0x3f/0x90 [ 26.537311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.537951] [ 26.538163] The buggy address belongs to the object at ffff88801b94a2b8 [ 26.538163] which belongs to the cache vm_area_struct of size 168 [ 26.539628] The buggy address is located 88 bytes inside of [ 26.539628] freed 168-byte region [ffff88801b94a2b8, ffff88801b94a360) [ 26.541012] [ 26.541224] The buggy address belongs to the physical page: [ 26.541866] page:00000000465ef551 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b94a [ 26.542956] memcg:ffff88801b930a01 [ 26.543377] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.544013] page_type: 0xffffffff() [ 26.544456] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 26.545372] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b930a01 [ 26.546266] page dumped because: kasan: bad access detected [ 26.546923] [ 26.547137] Memory state around the buggy address: [ 26.547706] ffff88801b94a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 26.548541] ffff88801b94a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 26.549388] >ffff88801b94a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 26.550218] ^ [ 26.550675] ffff88801b94a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 26.551524] ffff88801b94a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 26.552356] ================================================================== [ 26.553403] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.546273] BUG: Bad rss-counter state mm:0000000024844e01 type:MM_FILEPAGES val:33 [ 28.547331] BUG: Bad rss-counter state mm:0000000024844e01 type:MM_ANONPAGES val:22 [ 29.002259] BUG: Bad rss-counter state mm:00000000752fdeb5 type:MM_FILEPAGES val:33 [ 29.003920] BUG: Bad rss-counter state mm:00000000752fdeb5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12258' (ECDSA) to the list of known hosts. 2023/06/20 03:45:17 fuzzer started 2023/06/20 03:45:18 dialing manager at localhost:44161 2023/06/20 03:45:18 checking machine... 2023/06/20 03:45:18 checking revisions... [ 29.737133] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:45:18 testing simple program... [ 29.789905] cgroup: Unknown subsys name 'net' [ 29.853457] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:45:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880145e7418 RCX=0000000000000001 RDX=1ffff110028bce85 RSI=ffff8880145e73e8 RDI=ffff8880145e7428 RBP=ffff8880145e0000 RSP=ffff8880145e7358 R8 =0000000000000001 R9 =ffff8880145e7458 R10=0000000000038001 R11=0000000000006097 R12=ffff8880145e7478 R13=ffff8880145e7460 R14=ffff8880145e73e8 R15=ffff8880145e7418 RIP=ffffffff81131ca6 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 00007f7debb45900 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=00007f1737c4d650 CR3=000000000c6d6000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=837c38e8798c012d00000000000ae988 XMM05=c583eef5fac98e3900000000001341e0 XMM06=806171799158d9670000000000132c60 XMM07=fb795ef6d657705600000000001227e0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000004 RBX=ffff888008e1c0d8 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81f363ed RDI=ffff888008e1c0ec RBP=dffffc0000000000 RSP=ffff88801ca8f978 R8 =0000000000000004 R9 =000000001371c348 R10=000000001371c348 R11=0000000000000000 R12=000000001371c348 R13=000000001371c348 R14=ffff88801ca8fc38 R15=dffffc0000000000 RIP=ffffffff81f36402 RFL=00000202 [-------] 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 00007f1737698900 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=00007f1737c500b0 CR3=000000000d888000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000