[ 29.579756] BUG: Bad rss-counter state mm:000000004dbc053d type:MM_FILEPAGES val:33 [ 29.580495] BUG: Bad rss-counter state mm:000000004dbc053d type:MM_ANONPAGES val:22 [ 29.705131] ================================================================== [ 29.706337] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.707477] Read of size 8 at addr ffff888018f8d310 by task sshd/220 [ 29.708087] [ 29.708254] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.708929] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.709738] Call Trace: [ 29.709993] [ 29.710213] dump_stack_lvl+0x91/0xf0 [ 29.710596] print_report+0xcc/0x620 [ 29.710969] ? __virt_addr_valid+0x102/0x340 [ 29.711402] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.711909] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.712425] kasan_report+0xbe/0xf0 [ 29.712789] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.713256] vma_interval_tree_remove+0xc75/0xec0 [ 29.713713] vma_prepare+0xc54/0x11a0 [ 29.714080] __split_vma+0x5af/0x950 [ 29.714442] ? __pfx___split_vma+0x10/0x10 [ 29.714846] ? find_held_lock+0x2c/0x110 [ 29.715252] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.715690] ? lock_is_held_type+0x9f/0x120 [ 29.716111] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.716580] ? mtree_range_walk+0x632/0x900 [ 29.717006] ? mas_walk+0x5c7/0x7c0 [ 29.717362] do_vmi_munmap+0x1f1/0x2b0 [ 29.717741] mmap_region+0x1f9/0x2660 [ 29.718115] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.718525] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.719078] ? __pfx_lock_acquire+0x10/0x10 [ 29.719461] ? __pfx_mmap_region+0x10/0x10 [ 29.719838] ? security_mmap_addr+0x7d/0xa0 [ 29.720215] ? get_unmapped_area+0x1f5/0x3f0 [ 29.720601] do_mmap+0x854/0xf00 [ 29.720913] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.721270] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.721677] ksys_mmap_pgoff+0x3af/0x500 [ 29.722040] do_syscall_64+0x3f/0x90 [ 29.722384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.722837] RIP: 0033:0x7ffb5b2a6d82 [ 29.723171] 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 [ 29.724696] RSP: 002b:00007ffd57681718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.725330] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb5b2a6d82 [ 29.725920] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb5a6e0000 [ 29.726514] RBP: 00007ffb5a6e0000 R08: 0000000000000009 R09: 0000000000001000 [ 29.727102] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c02aa05ec0 [ 29.727691] R13: 00007ffd57681730 R14: 00007ffd57681760 R15: 00007ffd57681ac0 [ 29.728287] [ 29.728490] [ 29.728642] Allocated by task 211: [ 29.728946] kasan_save_stack+0x22/0x50 [ 29.729295] kasan_set_track+0x25/0x30 [ 29.729645] __kasan_slab_alloc+0x59/0x70 [ 29.730012] kmem_cache_alloc+0x16b/0x370 [ 29.730392] vm_area_dup+0x20/0x160 [ 29.730714] __split_vma+0x170/0x950 [ 29.731046] split_vma+0xc6/0x110 [ 29.731347] mprotect_fixup+0x8d2/0xb30 [ 29.731703] do_mprotect_pkey+0x87e/0xd40 [ 29.732075] __x64_sys_mprotect+0x78/0xc0 [ 29.732442] do_syscall_64+0x3f/0x90 [ 29.732777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.733228] [ 29.733378] Freed by task 19: [ 29.733649] kasan_save_stack+0x22/0x50 [ 29.734004] kasan_set_track+0x25/0x30 [ 29.734366] kasan_save_free_info+0x2b/0x50 [ 29.734744] __kasan_slab_free+0x10a/0x190 [ 29.735117] kmem_cache_free+0x10d/0x4d0 [ 29.735469] rcu_core+0x8c8/0x2860 [ 29.735795] __do_softirq+0x1b7/0x7d4 [ 29.736132] [ 29.736283] Last potentially related work creation: [ 29.736691] kasan_save_stack+0x22/0x50 [ 29.737045] __kasan_record_aux_stack+0x8e/0xa0 [ 29.737450] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.737908] remove_vma+0x139/0x170 [ 29.738226] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.738631] do_vmi_munmap+0x1f1/0x2b0 [ 29.738973] __vm_munmap+0x138/0x3a0 [ 29.739300] __x64_sys_munmap+0x59/0x80 [ 29.739650] do_syscall_64+0x3f/0x90 [ 29.739979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.740429] [ 29.740583] The buggy address belongs to the object at ffff888018f8d2b8 [ 29.740583] which belongs to the cache vm_area_struct of size 168 [ 29.741613] The buggy address is located 88 bytes inside of [ 29.741613] freed 168-byte region [ffff888018f8d2b8, ffff888018f8d360) [ 29.742595] [ 29.742745] The buggy address belongs to the physical page: [ 29.743201] page:000000007622394b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f8d [ 29.743959] memcg:ffff8880097e8501 [ 29.744257] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.744700] page_type: 0xffffffff() [ 29.745016] raw: 0100000000000200 ffff88800879fc80 ffffea000038f900 dead000000000004 [ 29.745652] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097e8501 [ 29.746272] page dumped because: kasan: bad access detected [ 29.746734] [ 29.746882] Memory state around the buggy address: [ 29.747290] ffff888018f8d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.747882] ffff888018f8d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 29.748469] >ffff888018f8d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 29.749126] ^ [ 29.749463] ffff888018f8d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.750061] ffff888018f8d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.750663] ================================================================== [ 29.751321] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.627231] BUG: Bad rss-counter state mm:0000000033b5ea80 type:MM_FILEPAGES val:33 [ 31.627993] BUG: Bad rss-counter state mm:0000000033b5ea80 type:MM_ANONPAGES val:22 [ 32.076523] BUG: Bad rss-counter state mm:00000000596383ca type:MM_FILEPAGES val:33 [ 32.077284] BUG: Bad rss-counter state mm:00000000596383ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21552' (ECDSA) to the list of known hosts. 2023/06/19 22:47:28 fuzzer started 2023/06/19 22:47:29 dialing manager at localhost:44161 2023/06/19 22:47:29 checking machine... 2023/06/19 22:47:29 checking revisions... [ 32.792622] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:47:29 testing simple program... [ 32.842047] cgroup: Unknown subsys name 'net' [ 32.888694] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:47:23 Registers: info registers vcpu 0 RAX=ffff88806ce09e58 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09e01 RSI=ffff88806ce09e00 RDI=ffff88806ce09e00 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000000fc0f R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09e00 R15=ffff88806ce09a70 RIP=ffffffff81131236 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 00007f4c22837900 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=00007f4c21ca2c90 CR3=000000000d81a000 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=cb2784f55d2272b8b04ed77233aad2fb XMM02=000000000011c660d59e07bde36eea69 XMM03=000000000011c788ec2efd57dc4c00df XMM04=7f3f7ccc3522d17400000000000ae988 XMM05=ce1d59bcd642dfd60000000000134270 XMM06=66dfefb4026e79f40000000000132ca0 XMM07=fb795ef6d657705600000000001231d0 XMM08=2c67c8bc2e329bc3000000000011c788 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff864b9d56 RDX=1ffff11001f9de2d RSI=0000000000000000 RDI=ffff88800fcef168 RBP=ffff88800fcef1f0 RSP=ffff88800fcef138 R8 =ffffffff864b9d5a R9 =ffff88800fcef198 R10=0000000000038001 R11=00000000000b6996 R12=ffff88800fcef220 R13=ffff88800fcef1a0 R14=ffff88800fceff58 R15=ffff88800fcef158 RIP=ffffffff81130933 RFL=00000292 [--S-A--] 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 00007fb6e6898900 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=00007fb6e6877020 CR3=000000000ef9c000 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