[ 23.903097] BUG: Bad rss-counter state mm:00000000c0e517a0 type:MM_FILEPAGES val:33 [ 23.904610] BUG: Bad rss-counter state mm:00000000c0e517a0 type:MM_ANONPAGES val:22 [ 23.941929] ================================================================== [ 23.943013] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.944176] Read of size 8 at addr ffff88800daa34e0 by task sshd/220 [ 23.945189] [ 23.945493] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.946550] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.947760] Call Trace: [ 23.948145] [ 23.948488] dump_stack_lvl+0x91/0xf0 [ 23.949074] print_report+0xcc/0x620 [ 23.949659] ? __virt_addr_valid+0x102/0x340 [ 23.950325] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.951088] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.951839] kasan_report+0xbe/0xf0 [ 23.952411] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.953170] vma_interval_tree_remove+0xc75/0xec0 [ 23.953910] vma_prepare+0xc54/0x11a0 [ 23.954492] __split_vma+0x5af/0x950 [ 23.955089] ? __pfx___split_vma+0x10/0x10 [ 23.955738] ? find_held_lock+0x2c/0x110 [ 23.956370] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.957065] ? lock_is_held_type+0x9f/0x120 [ 23.957730] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.958469] ? mtree_range_walk+0x632/0x900 [ 23.959144] ? mas_walk+0x5c7/0x7c0 [ 23.959708] do_vmi_munmap+0x1f1/0x2b0 [ 23.960303] mmap_region+0x1f9/0x2660 [ 23.960888] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.961499] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.962382] ? __pfx_lock_acquire+0x10/0x10 [ 23.963042] ? __pfx_mmap_region+0x10/0x10 [ 23.963678] ? security_mmap_addr+0x7d/0xa0 [ 23.964326] ? get_unmapped_area+0x1f5/0x3f0 [ 23.965005] do_mmap+0x854/0xf00 [ 23.965540] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.966133] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.966814] ksys_mmap_pgoff+0x3af/0x500 [ 23.967462] do_syscall_64+0x3f/0x90 [ 23.968047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.968840] RIP: 0033:0x7f688f21ed82 [ 23.969374] 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 [ 23.971583] RSP: 002b:00007fff85ce4888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.972507] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f688f21ed82 [ 23.973352] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f688e658000 [ 23.974200] RBP: 00007f688e658000 R08: 0000000000000009 R09: 0000000000001000 [ 23.975067] R10: 0000000000000812 R11: 0000000000000206 R12: 00005619ad299f70 [ 23.975918] R13: 00007fff85ce48a0 R14: 00007fff85ce48d0 R15: 00007fff85ce4c30 [ 23.976772] [ 23.977061] [ 23.977285] Allocated by task 213: [ 23.977722] kasan_save_stack+0x22/0x50 [ 23.978232] kasan_set_track+0x25/0x30 [ 23.978728] __kasan_slab_alloc+0x59/0x70 [ 23.979340] kmem_cache_alloc+0x16b/0x370 [ 23.979877] vm_area_dup+0x20/0x160 [ 23.980331] __split_vma+0x170/0x950 [ 23.980813] split_vma+0xc6/0x110 [ 23.981249] mprotect_fixup+0x8d2/0xb30 [ 23.981752] do_mprotect_pkey+0x87e/0xd40 [ 23.982272] __x64_sys_mprotect+0x78/0xc0 [ 23.982798] do_syscall_64+0x3f/0x90 [ 23.983285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.983949] [ 23.984165] Freed by task 213: [ 23.984562] kasan_save_stack+0x22/0x50 [ 23.985071] kasan_set_track+0x25/0x30 [ 23.985559] kasan_save_free_info+0x2b/0x50 [ 23.986088] __kasan_slab_free+0x10a/0x190 [ 23.986614] kmem_cache_free+0x10d/0x4d0 [ 23.987136] rcu_core+0x8c8/0x2860 [ 23.987580] __do_softirq+0x1b7/0x7d4 [ 23.988061] [ 23.988279] Last potentially related work creation: [ 23.988863] kasan_save_stack+0x22/0x50 [ 23.989363] __kasan_record_aux_stack+0x8e/0xa0 [ 23.989934] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.990581] remove_vma+0x139/0x170 [ 23.991048] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.991615] do_vmi_munmap+0x1f1/0x2b0 [ 23.992100] __vm_munmap+0x138/0x3a0 [ 23.992566] __x64_sys_munmap+0x59/0x80 [ 23.993062] do_syscall_64+0x3f/0x90 [ 23.993534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.994172] [ 23.994390] Second to last potentially related work creation: [ 23.995074] kasan_save_stack+0x22/0x50 [ 23.995572] __kasan_record_aux_stack+0x8e/0xa0 [ 23.996153] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.996799] remove_vma+0x139/0x170 [ 23.997250] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.997807] do_vmi_munmap+0x1f1/0x2b0 [ 23.998293] mmap_region+0x1f9/0x2660 [ 23.998767] do_mmap+0x854/0xf00 [ 23.999208] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.999695] ksys_mmap_pgoff+0x3af/0x500 [ 24.000189] do_syscall_64+0x3f/0x90 [ 24.000666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.001308] [ 24.001523] The buggy address belongs to the object at ffff88800daa3488 [ 24.001523] which belongs to the cache vm_area_struct of size 168 [ 24.003000] The buggy address is located 88 bytes inside of [ 24.003000] freed 168-byte region [ffff88800daa3488, ffff88800daa3530) [ 24.004395] [ 24.004610] The buggy address belongs to the physical page: [ 24.005264] page:000000004e675496 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdaa3 [ 24.006344] memcg:ffff88800d93e201 [ 24.006768] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.007424] page_type: 0xffffffff() [ 24.007870] raw: 0100000000000200 ffff8880087a0c80 ffffea000025d000 000000000000000a [ 24.008792] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d93e201 [ 24.009709] page dumped because: kasan: bad access detected [ 24.010369] [ 24.010588] Memory state around the buggy address: [ 24.011189] ffff88800daa3380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.012043] ffff88800daa3400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.012893] >ffff88800daa3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.013738] ^ [ 24.014493] ffff88800daa3500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 24.015360] ffff88800daa3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.016211] ================================================================== [ 24.017191] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.016211] BUG: Bad rss-counter state mm:0000000035a0787c type:MM_FILEPAGES val:33 [ 26.017426] BUG: Bad rss-counter state mm:0000000035a0787c type:MM_ANONPAGES val:22 [ 26.395955] BUG: Bad rss-counter state mm:000000008036ab74 type:MM_FILEPAGES val:33 [ 26.397261] BUG: Bad rss-counter state mm:000000008036ab74 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10909' (ECDSA) to the list of known hosts. 2023/06/21 07:20:25 fuzzer started 2023/06/21 07:20:25 dialing manager at localhost:36067 2023/06/21 07:20:25 checking machine... 2023/06/21 07:20:25 checking revisions... [ 27.151095] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:20:26 testing simple program... [ 27.200740] cgroup: Unknown subsys name 'net' [ 27.256827] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:20:25 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800dac7ce8 RCX=ffffffff82197f0f RDX=ffff88800f4eb680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000010 RSP=ffff88800f1c7e60 R8 =0000000000000005 R9 =0000000000000010 R10=0000000000000010 R11=00000000000b6a61 R12=ffff88800dac7c00 R13=dffffc0000000000 R14=ffffed1001b58f9d R15=0000000000000000 RIP=ffffffff814c0261 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 00007f9ebf6c6900 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=00007f9ebf67a01c CR3=00000000193b2000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff816cb50b RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002b6ae68 RSI=ffffffff816cb50b RDI=ffff888015b573b0 RBP=ffff888015b57380 RSP=ffff888015b572e0 R8 =0000000000000001 R9 =ffff888015b57328 R10=0000000000038001 R11=0000000000020d03 R12=ffff888015b573b0 R13=0000000000000000 R14=ffff888019f651c0 R15=0000000000092820 RIP=ffffffff813ad474 RFL=00000282 [--S----] 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 00007f588f432700 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=000055b023685f08 CR3=000000000db4c000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732035323a3032 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343638 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000