[ 31.489706] BUG: Bad rss-counter state mm:0000000080e206ae type:MM_FILEPAGES val:31 [ 31.490651] BUG: Bad rss-counter state mm:0000000080e206ae type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.637221] ================================================================== [ 31.638236] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.639586] Read of size 8 at addr ffff88800dd7a4e0 by task sshd/218 [ 31.640629] [ 31.640930] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.642141] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.643476] Call Trace: [ 31.643952] [ 31.644338] dump_stack_lvl+0x91/0xf0 [ 31.645006] print_report+0xcc/0x620 [ 31.645668] ? __virt_addr_valid+0x102/0x340 [ 31.646429] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.647276] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.648144] kasan_report+0xbe/0xf0 [ 31.648822] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.649681] vma_interval_tree_remove+0xc75/0xec0 [ 31.650501] vma_prepare+0xc54/0x11a0 [ 31.651163] __split_vma+0x5af/0x950 [ 31.651825] ? __pfx___split_vma+0x10/0x10 [ 31.652557] ? find_held_lock+0x2c/0x110 [ 31.653275] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.654071] ? lock_is_held_type+0x9f/0x120 [ 31.654824] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.655692] ? mtree_range_walk+0x632/0x900 [ 31.656452] ? mas_walk+0x5c7/0x7c0 [ 31.657104] do_vmi_munmap+0x1f1/0x2b0 [ 31.657784] mmap_region+0x1f9/0x2660 [ 31.658457] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.659155] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.660151] ? __pfx_lock_acquire+0x10/0x10 [ 31.660893] ? __pfx_mmap_region+0x10/0x10 [ 31.661624] ? security_mmap_addr+0x7d/0xa0 [ 31.662357] ? get_unmapped_area+0x1f5/0x3f0 [ 31.663115] do_mmap+0x854/0xf00 [ 31.663733] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.664310] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.664959] ksys_mmap_pgoff+0x3af/0x500 [ 31.665548] do_syscall_64+0x3f/0x90 [ 31.666098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.666847] RIP: 0033:0x7f3fde2f1d82 [ 31.667373] 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 [ 31.669859] RSP: 002b:00007ffd2e866808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.670914] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3fde2f1d82 [ 31.671906] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3fdd72b000 [ 31.672902] RBP: 00007f3fdd72b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.673888] R10: 0000000000000812 R11: 0000000000000206 R12: 00005577dbb8af70 [ 31.674874] R13: 00007ffd2e866820 R14: 00007ffd2e866850 R15: 00007ffd2e866bb0 [ 31.675887] [ 31.676227] [ 31.676477] Allocated by task 211: [ 31.676972] kasan_save_stack+0x22/0x50 [ 31.677552] kasan_set_track+0x25/0x30 [ 31.678123] __kasan_slab_alloc+0x59/0x70 [ 31.678728] kmem_cache_alloc+0x16b/0x370 [ 31.679333] vm_area_dup+0x20/0x160 [ 31.679864] __split_vma+0x170/0x950 [ 31.680409] split_vma+0xc6/0x110 [ 31.680918] mprotect_fixup+0x8d2/0xb30 [ 31.681501] do_mprotect_pkey+0x87e/0xd40 [ 31.682103] __x64_sys_mprotect+0x78/0xc0 [ 31.682701] do_syscall_64+0x3f/0x90 [ 31.683254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.684004] [ 31.684257] Freed by task 202: [ 31.684714] kasan_save_stack+0x22/0x50 [ 31.685298] kasan_set_track+0x25/0x30 [ 31.685866] kasan_save_free_info+0x2b/0x50 [ 31.686483] __kasan_slab_free+0x10a/0x190 [ 31.687098] kmem_cache_free+0x10d/0x4d0 [ 31.687714] rcu_core+0x8c8/0x2860 [ 31.688225] __do_softirq+0x1b7/0x7d4 [ 31.688776] [ 31.689025] Last potentially related work creation: [ 31.689702] kasan_save_stack+0x22/0x50 [ 31.690294] __kasan_record_aux_stack+0x8e/0xa0 [ 31.690959] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.691719] remove_vma+0x139/0x170 [ 31.692241] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.692880] do_vmi_munmap+0x1f1/0x2b0 [ 31.693444] __vm_munmap+0x138/0x3a0 [ 31.693987] __x64_sys_munmap+0x59/0x80 [ 31.694558] do_syscall_64+0x3f/0x90 [ 31.695106] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.695859] [ 31.696104] Second to last potentially related work creation: [ 31.696892] kasan_save_stack+0x22/0x50 [ 31.697479] __kasan_record_aux_stack+0x8e/0xa0 [ 31.698139] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.698886] remove_vma+0x139/0x170 [ 31.699407] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.700056] do_vmi_munmap+0x1f1/0x2b0 [ 31.700620] mmap_region+0x1f9/0x2660 [ 31.701173] do_mmap+0x854/0xf00 [ 31.701671] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.702246] ksys_mmap_pgoff+0x3af/0x500 [ 31.702825] do_syscall_64+0x3f/0x90 [ 31.703380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.704144] [ 31.704394] The buggy address belongs to the object at ffff88800dd7a488 [ 31.704394] which belongs to the cache vm_area_struct of size 168 [ 31.706102] The buggy address is located 88 bytes inside of [ 31.706102] freed 168-byte region [ffff88800dd7a488, ffff88800dd7a530) [ 31.707747] [ 31.707997] The buggy address belongs to the physical page: [ 31.708765] page:000000003b8cb08e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd7a [ 31.710032] memcg:ffff88800c8f0501 [ 31.710527] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.711268] page_type: 0xffffffff() [ 31.711803] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a1080 dead000000000004 [ 31.712864] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c8f0501 [ 31.713920] page dumped because: kasan: bad access detected [ 31.714691] [ 31.714942] Memory state around the buggy address: [ 31.715625] ffff88800dd7a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.716614] ffff88800dd7a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.717617] >ffff88800dd7a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.718604] ^ [ 31.719482] ffff88800dd7a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.720500] ffff88800dd7a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.721485] ================================================================== [ 31.722604] Disabling lock debugging due to kernel taint [ 33.482078] BUG: Bad rss-counter state mm:0000000071e729f8 type:MM_FILEPAGES val:33 [ 33.483092] BUG: Bad rss-counter state mm:0000000071e729f8 type:MM_ANONPAGES val:22 [ 34.045113] BUG: Bad rss-counter state mm:000000009efa72bd type:MM_FILEPAGES val:33 [ 34.046308] BUG: Bad rss-counter state mm:000000009efa72bd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29716' (ECDSA) to the list of known hosts. 2023/06/20 22:26:03 fuzzer started 2023/06/20 22:26:04 dialing manager at localhost:36067 2023/06/20 22:26:04 checking machine... 2023/06/20 22:26:04 checking revisions... [ 34.697212] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:26:04 testing simple program... [ 34.741244] cgroup: Unknown subsys name 'net' [ 34.813883] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:26:03 Registers: info registers vcpu 0 RAX=1ffffffff0c0b21b RBX=ffffffff860590d8 RCX=ffffffff86607dd3 RDX=0000000000000000 RSI=ffffffff86073d08 RDI=ffffffff85d7a9c4 RBP=ffffffff86056148 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff8605c068 R13=ffffffff85d7a9c4 R14=ffffffff86056144 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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=00007f5fcd70cea0 CR3=000000000ca06000 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=804882ab6d325bb9c14dbf1f4ff54136 XMM02=000000000011a528ec2efd57dc4c00df XMM03=0000000000121180a7a4f42625713cfd XMM04=e4c4b908127a2a6f00000000000ae988 XMM05=751b9502027dc0b90000000000132080 XMM06=ef12a3e376a25e5f0000000000130af0 XMM07=e042d86d42eb936e0000000000121458 XMM08=a7a4f42625713cfd000000000011a588 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff888013f32260 RCX=ffff888013f32260 RDX=00000000000d000d RSI=ffff888013f32260 RDI=ffff88800844f780 RBP=ffff88801978fa28 RSP=ffff88801978f990 R8 =0000000000000001 R9 =0000000000000000 R10=ffffea00004fcc80 R11=00000000000d000c R12=ffffea00004fcc80 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff81809662 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 00007ff23a1e4900 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=00007fff16cbd000 CR3=000000000fdf0000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000