[ 30.030441] BUG: Bad rss-counter state mm:00000000ea2ded8c type:MM_FILEPAGES val:33 [ 30.031462] BUG: Bad rss-counter state mm:00000000ea2ded8c type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.191029] ================================================================== [ 30.192126] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.193309] Read of size 8 at addr ffff88800dbb4310 by task sshd/218 [ 30.194341] [ 30.194595] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.195492] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.196473] Call Trace: [ 30.196791] [ 30.197069] dump_stack_lvl+0x91/0xf0 [ 30.197552] print_report+0xcc/0x620 [ 30.198019] ? __virt_addr_valid+0x102/0x340 [ 30.198551] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.199157] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.199783] kasan_report+0xbe/0xf0 [ 30.200264] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.200900] vma_interval_tree_remove+0xc75/0xec0 [ 30.201508] vma_prepare+0xc54/0x11a0 [ 30.201990] __split_vma+0x5af/0x950 [ 30.202459] ? __pfx___split_vma+0x10/0x10 [ 30.202980] ? find_held_lock+0x2c/0x110 [ 30.203492] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.204043] ? lock_is_held_type+0x9f/0x120 [ 30.204585] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.205209] ? mtree_range_walk+0x632/0x900 [ 30.205750] ? mas_walk+0x5c7/0x7c0 [ 30.206214] do_vmi_munmap+0x1f1/0x2b0 [ 30.206693] mmap_region+0x1f9/0x2660 [ 30.207164] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.207661] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.208356] ? __pfx_lock_acquire+0x10/0x10 [ 30.208887] ? __pfx_mmap_region+0x10/0x10 [ 30.209407] ? security_mmap_addr+0x7d/0xa0 [ 30.209930] ? get_unmapped_area+0x1f5/0x3f0 [ 30.210479] do_mmap+0x854/0xf00 [ 30.210910] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.211393] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.211944] ksys_mmap_pgoff+0x3af/0x500 [ 30.212442] do_syscall_64+0x3f/0x90 [ 30.212948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.213584] RIP: 0033:0x7fb569382d82 [ 30.214031] 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 [ 30.216172] RSP: 002b:00007ffdb6cc3788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.217062] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb569382d82 [ 30.217909] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb5687bc000 [ 30.218750] RBP: 00007fb5687bc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.219583] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a0018e1ec0 [ 30.220423] R13: 00007ffdb6cc37a0 R14: 00007ffdb6cc37d0 R15: 00007ffdb6cc3b30 [ 30.221276] [ 30.221565] [ 30.221775] Allocated by task 211: [ 30.222200] kasan_save_stack+0x22/0x50 [ 30.222697] kasan_set_track+0x25/0x30 [ 30.223191] __kasan_slab_alloc+0x59/0x70 [ 30.223725] kmem_cache_alloc+0x16b/0x370 [ 30.224250] vm_area_dup+0x20/0x160 [ 30.224727] __split_vma+0x170/0x950 [ 30.225207] split_vma+0xc6/0x110 [ 30.225643] mprotect_fixup+0x8d2/0xb30 [ 30.226137] do_mprotect_pkey+0x87e/0xd40 [ 30.226643] __x64_sys_mprotect+0x78/0xc0 [ 30.227154] do_syscall_64+0x3f/0x90 [ 30.227617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.228251] [ 30.228462] Freed by task 19: [ 30.228842] kasan_save_stack+0x22/0x50 [ 30.229334] kasan_set_track+0x25/0x30 [ 30.229811] kasan_save_free_info+0x2b/0x50 [ 30.230324] __kasan_slab_free+0x10a/0x190 [ 30.230843] kmem_cache_free+0x10d/0x4d0 [ 30.231342] rcu_core+0x8c8/0x2860 [ 30.231770] __do_softirq+0x1b7/0x7d4 [ 30.232236] [ 30.232449] Last potentially related work creation: [ 30.233022] kasan_save_stack+0x22/0x50 [ 30.233525] __kasan_record_aux_stack+0x8e/0xa0 [ 30.234092] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.234726] remove_vma+0x139/0x170 [ 30.235220] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.235776] do_vmi_munmap+0x1f1/0x2b0 [ 30.236252] __vm_munmap+0x138/0x3a0 [ 30.236719] __x64_sys_munmap+0x59/0x80 [ 30.237214] do_syscall_64+0x3f/0x90 [ 30.237684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.238320] [ 30.238543] The buggy address belongs to the object at ffff88800dbb42b8 [ 30.238543] which belongs to the cache vm_area_struct of size 168 [ 30.239990] The buggy address is located 88 bytes inside of [ 30.239990] freed 168-byte region [ffff88800dbb42b8, ffff88800dbb4360) [ 30.241372] [ 30.241582] The buggy address belongs to the physical page: [ 30.242228] page:00000000dbb9850d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbb4 [ 30.243296] memcg:ffff88800e816101 [ 30.243718] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.244345] page_type: 0xffffffff() [ 30.244800] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ad3c0 dead000000000008 [ 30.245698] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e816101 [ 30.246588] page dumped because: kasan: bad access detected [ 30.247242] [ 30.247458] Memory state around the buggy address: [ 30.248028] ffff88800dbb4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.248876] ffff88800dbb4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.249714] >ffff88800dbb4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.250558] ^ [ 30.251019] ffff88800dbb4380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.251869] ffff88800dbb4400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.252718] ================================================================== [ 30.253644] Disabling lock debugging due to kernel taint [ 32.231942] BUG: Bad rss-counter state mm:00000000f1c7f19f type:MM_FILEPAGES val:33 [ 32.232722] BUG: Bad rss-counter state mm:00000000f1c7f19f type:MM_ANONPAGES val:22 [ 32.728666] BUG: Bad rss-counter state mm:000000000a2eb814 type:MM_FILEPAGES val:33 [ 32.729852] BUG: Bad rss-counter state mm:000000000a2eb814 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37075' (ECDSA) to the list of known hosts. 2023/06/20 22:18:37 fuzzer started 2023/06/20 22:18:37 dialing manager at localhost:36067 2023/06/20 22:18:37 checking machine... 2023/06/20 22:18:37 checking revisions... [ 33.395361] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:18:38 testing simple program... [ 33.441050] cgroup: Unknown subsys name 'net' [ 33.501752] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:18:37 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fe336d65100 CR3=000000000d774000 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=38313a3232203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3732325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343830 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00007f8eae8b9e07 RCX=0000000080000000 RDX=ffff888015d93680 RSI=ffffffff81007b6c RDI=0000000000000005 RBP=0000000000000001 RSP=ffff888016706fd0 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6a61 R12=ffff888016707118 R13=0000000000000000 R14=ffff888015d93680 R15=0000000000000000 RIP=ffffffff814c0871 RFL=00000297 [--S-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 00007f8eadd27900 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=00007f8eadd06020 CR3=000000000eab2000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000