[ 29.714286] BUG: Bad rss-counter state mm:00000000e45f151e type:MM_FILEPAGES val:33 [ 29.715431] BUG: Bad rss-counter state mm:00000000e45f151e type:MM_ANONPAGES val:22 [ 29.948371] ================================================================== [ 29.948971] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.949565] Read of size 8 at addr ffff88800d935798 by task sshd/219 [ 29.950046] [ 29.950189] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.950889] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.951528] Call Trace: [ 29.951734] [ 29.951918] dump_stack_lvl+0x91/0xf0 [ 29.952277] print_report+0xcc/0x620 [ 29.952591] ? __virt_addr_valid+0x102/0x340 [ 29.952948] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.953345] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.953738] kasan_report+0xbe/0xf0 [ 29.954050] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.954556] vma_interval_tree_remove+0xc75/0xec0 [ 29.955031] vma_prepare+0xc54/0x11a0 [ 29.955345] __split_vma+0x5af/0x950 [ 29.955651] ? __pfx___split_vma+0x10/0x10 [ 29.956027] ? find_held_lock+0x2c/0x110 [ 29.956365] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.956727] ? lock_is_held_type+0x9f/0x120 [ 29.957110] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.957515] ? mtree_range_walk+0x632/0x900 [ 29.957876] ? mas_walk+0x5c7/0x7c0 [ 29.958186] do_vmi_munmap+0x1f1/0x2b0 [ 29.958636] mmap_region+0x1f9/0x2660 [ 29.958951] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.959283] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.959747] ? __pfx_lock_acquire+0x10/0x10 [ 29.960095] ? __pfx_mmap_region+0x10/0x10 [ 29.960438] ? security_mmap_addr+0x7d/0xa0 [ 29.960784] ? get_unmapped_area+0x1f5/0x3f0 [ 29.961144] do_mmap+0x854/0xf00 [ 29.961428] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.961749] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.962153] ksys_mmap_pgoff+0x3af/0x500 [ 29.962600] do_syscall_64+0x3f/0x90 [ 29.962907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.963321] RIP: 0033:0x7f8e62c53d82 [ 29.963626] 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 [ 29.964959] RSP: 002b:00007ffe2f50df48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.965535] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e62c53d82 [ 29.966076] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e6208d000 [ 29.966708] RBP: 00007f8e6208d000 R08: 0000000000000009 R09: 0000000000001000 [ 29.967283] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d85728fec0 [ 29.967855] R13: 00007ffe2f50df60 R14: 00007ffe2f50df90 R15: 00007ffe2f50e2f0 [ 29.968403] [ 29.968593] [ 29.968734] Allocated by task 212: [ 29.969008] kasan_save_stack+0x22/0x50 [ 29.969338] kasan_set_track+0x25/0x30 [ 29.969658] __kasan_slab_alloc+0x59/0x70 [ 29.970001] kmem_cache_alloc+0x16b/0x370 [ 29.970339] vm_area_dup+0x20/0x160 [ 29.970676] __split_vma+0x170/0x950 [ 29.970979] split_vma+0xc6/0x110 [ 29.971266] mprotect_fixup+0x8d2/0xb30 [ 29.971591] do_mprotect_pkey+0x87e/0xd40 [ 29.971940] __x64_sys_mprotect+0x78/0xc0 [ 29.972299] do_syscall_64+0x3f/0x90 [ 29.972606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.973029] [ 29.973203] Freed by task 19: [ 29.973450] kasan_save_stack+0x22/0x50 [ 29.973771] kasan_set_track+0x25/0x30 [ 29.974088] kasan_save_free_info+0x2b/0x50 [ 29.974589] __kasan_slab_free+0x10a/0x190 [ 29.974931] kmem_cache_free+0x10d/0x4d0 [ 29.975261] rcu_core+0x8c8/0x2860 [ 29.975614] __do_softirq+0x1b7/0x7d4 [ 29.975927] [ 29.976070] Last potentially related work creation: [ 29.976451] kasan_save_stack+0x22/0x50 [ 29.976777] __kasan_record_aux_stack+0x8e/0xa0 [ 29.977174] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.977586] remove_vma+0x139/0x170 [ 29.977878] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.978280] do_vmi_munmap+0x1f1/0x2b0 [ 29.978635] __vm_munmap+0x138/0x3a0 [ 29.978939] __x64_sys_munmap+0x59/0x80 [ 29.979259] do_syscall_64+0x3f/0x90 [ 29.979569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.979984] [ 29.980126] The buggy address belongs to the object at ffff88800d935740 [ 29.980126] which belongs to the cache vm_area_struct of size 168 [ 29.981051] The buggy address is located 88 bytes inside of [ 29.981051] freed 168-byte region [ffff88800d935740, ffff88800d9357e8) [ 29.981945] [ 29.982114] The buggy address belongs to the physical page: [ 29.983426] page:00000000c7b8b12c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd935 [ 29.984113] memcg:ffff888018ebf301 [ 29.984388] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.984837] page_type: 0xffffffff() [ 29.985131] raw: 0100000000000200 ffff8880087a0c80 ffffea000056f480 dead000000000007 [ 29.985712] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ebf301 [ 29.986284] page dumped because: kasan: bad access detected [ 29.986826] [ 29.986966] Memory state around the buggy address: [ 29.987340] ffff88800d935680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.987877] ffff88800d935700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.988465] >ffff88800d935780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.989007] ^ [ 29.989324] ffff88800d935800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.989868] ffff88800d935880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.990508] ================================================================== [ 29.991270] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.413753] BUG: Bad rss-counter state mm:000000003fd5cac5 type:MM_FILEPAGES val:33 [ 33.414380] BUG: Bad rss-counter state mm:000000003fd5cac5 type:MM_ANONPAGES val:22 [ 33.984881] BUG: Bad rss-counter state mm:000000007957900f type:MM_FILEPAGES val:33 [ 33.985552] BUG: Bad rss-counter state mm:000000007957900f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23937' (ECDSA) to the list of known hosts. 2023/06/21 08:22:50 fuzzer started 2023/06/21 08:22:50 dialing manager at localhost:36067 2023/06/21 08:22:50 checking machine... 2023/06/21 08:22:50 checking revisions... [ 34.723044] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:22:50 testing simple program... [ 34.759803] cgroup: Unknown subsys name 'net' [ 34.824825] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:22:50 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00007f2c49aa8600 RCX=0000000080000000 RDX=ffff88800f0d8000 RSI=ffffffff813a0b26 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff888009a9f4e0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800f0d8000 R15=ffff88800dcbbc00 RIP=ffffffff814c0871 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 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=00007f2c49a19790 CR3=00000000146b6000 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=2030353a32323a3830203132206e754a XMM01=5d3235353538392e33332020205b203a XMM02=415f4d4d3a6570797420663030393735 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a32323a3830203132 XMM08=3d656e696c646d632022656369767265 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=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fdfdb7afd20 CR3=0000000013a42000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=6eb4d3a4eab5d90d00000000001329b0 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=990ee2a3f828fb6100000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000