[ 24.487831] BUG: Bad rss-counter state mm:00000000a55d0094 type:MM_FILEPAGES val:33 [ 24.489122] BUG: Bad rss-counter state mm:00000000a55d0094 type:MM_ANONPAGES val:22 [ 24.660436] ================================================================== [ 24.661367] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.662326] Read of size 8 at addr ffff88800cd67ed8 by task sshd/218 [ 24.663106] [ 24.663433] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.664316] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.665304] Call Trace: [ 24.665629] [ 24.665921] dump_stack_lvl+0x91/0xf0 [ 24.666412] print_report+0xcc/0x620 [ 24.666897] ? __virt_addr_valid+0x102/0x340 [ 24.667449] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.668083] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.668727] kasan_report+0xbe/0xf0 [ 24.669209] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.669837] vma_interval_tree_remove+0xc75/0xec0 [ 24.670444] vma_prepare+0xc54/0x11a0 [ 24.670926] __split_vma+0x5af/0x950 [ 24.671402] ? __pfx___split_vma+0x10/0x10 [ 24.671935] ? find_held_lock+0x2c/0x110 [ 24.672485] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.673049] ? lock_is_held_type+0x9f/0x120 [ 24.673584] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.674192] ? mtree_range_walk+0x632/0x900 [ 24.674740] ? mas_walk+0x5c7/0x7c0 [ 24.675216] do_vmi_munmap+0x1f1/0x2b0 [ 24.675709] mmap_region+0x1f9/0x2660 [ 24.676204] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.676718] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.677433] ? __pfx_lock_acquire+0x10/0x10 [ 24.677967] ? __pfx_mmap_region+0x10/0x10 [ 24.678504] ? security_mmap_addr+0x7d/0xa0 [ 24.679038] ? get_unmapped_area+0x1f5/0x3f0 [ 24.679591] do_mmap+0x854/0xf00 [ 24.680029] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.680548] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.681115] ksys_mmap_pgoff+0x3af/0x500 [ 24.681622] do_syscall_64+0x3f/0x90 [ 24.682101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.682750] RIP: 0033:0x7fa1005f0d82 [ 24.683208] 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 [ 24.685334] RSP: 002b:00007ffd5328b048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.686238] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa1005f0d82 [ 24.687080] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa0ffa2a000 [ 24.687934] RBP: 00007fa0ffa2a000 R08: 0000000000000009 R09: 0000000000001000 [ 24.688798] R10: 0000000000000812 R11: 0000000000000206 R12: 000056147c2c0ec0 [ 24.689638] R13: 00007ffd5328b060 R14: 00007ffd5328b090 R15: 00007ffd5328b3f0 [ 24.690495] [ 24.690789] [ 24.691006] Allocated by task 211: [ 24.691433] kasan_save_stack+0x22/0x50 [ 24.691943] kasan_set_track+0x25/0x30 [ 24.692453] __kasan_slab_alloc+0x59/0x70 [ 24.692979] kmem_cache_alloc+0x16b/0x370 [ 24.693493] vm_area_dup+0x20/0x160 [ 24.693947] __split_vma+0x170/0x950 [ 24.694419] split_vma+0xc6/0x110 [ 24.694882] mprotect_fixup+0x8d2/0xb30 [ 24.695389] do_mprotect_pkey+0x87e/0xd40 [ 24.695911] __x64_sys_mprotect+0x78/0xc0 [ 24.696442] do_syscall_64+0x3f/0x90 [ 24.696914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.697571] [ 24.697792] Freed by task 211: [ 24.698193] kasan_save_stack+0x22/0x50 [ 24.698701] kasan_set_track+0x25/0x30 [ 24.699201] kasan_save_free_info+0x2b/0x50 [ 24.699730] __kasan_slab_free+0x10a/0x190 [ 24.700287] kmem_cache_free+0x10d/0x4d0 [ 24.700793] rcu_core+0x8c8/0x2860 [ 24.701243] __do_softirq+0x1b7/0x7d4 [ 24.701737] [ 24.701953] Last potentially related work creation: [ 24.702536] kasan_save_stack+0x22/0x50 [ 24.703050] __kasan_record_aux_stack+0x8e/0xa0 [ 24.703628] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.704285] remove_vma+0x139/0x170 [ 24.704748] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.705307] do_vmi_munmap+0x1f1/0x2b0 [ 24.705794] __vm_munmap+0x138/0x3a0 [ 24.706270] __x64_sys_munmap+0x59/0x80 [ 24.706774] do_syscall_64+0x3f/0x90 [ 24.707252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.707897] [ 24.708118] The buggy address belongs to the object at ffff88800cd67e80 [ 24.708118] which belongs to the cache vm_area_struct of size 168 [ 24.709594] The buggy address is located 88 bytes inside of [ 24.709594] freed 168-byte region [ffff88800cd67e80, ffff88800cd67f28) [ 24.711007] [ 24.711224] The buggy address belongs to the physical page: [ 24.711884] page:00000000038b31fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcd67 [ 24.712976] memcg:ffff88800ed61301 [ 24.713415] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.714115] page_type: 0xffffffff() [ 24.714565] raw: 0100000000000200 ffff88800879fc80 ffffea000024e140 dead000000000007 [ 24.715480] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed61301 [ 24.716389] page dumped because: kasan: bad access detected [ 24.717045] [ 24.717260] Memory state around the buggy address: [ 24.717833] ffff88800cd67d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.718672] ffff88800cd67e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.719516] >ffff88800cd67e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.720405] ^ [ 24.721126] ffff88800cd67f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 24.721974] ffff88800cd67f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.722817] ================================================================== [ 24.723845] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.430601] BUG: Bad rss-counter state mm:00000000e67e9a44 type:MM_FILEPAGES val:33 [ 26.431780] BUG: Bad rss-counter state mm:00000000e67e9a44 type:MM_ANONPAGES val:22 [ 26.753763] BUG: Bad rss-counter state mm:000000006e2ce525 type:MM_FILEPAGES val:33 [ 26.755055] BUG: Bad rss-counter state mm:000000006e2ce525 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24008' (ECDSA) to the list of known hosts. 2023/06/19 11:21:50 fuzzer started 2023/06/19 11:21:51 dialing manager at localhost:44161 2023/06/19 11:21:51 checking machine... 2023/06/19 11:21:51 checking revisions... [ 27.402347] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:21:51 testing simple program... [ 27.442991] cgroup: Unknown subsys name 'net' [ 27.493614] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:21:50 Registers: info registers vcpu 0 RAX=1ffff11001c512f7 RBX=ffff88800e289788 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e2897b8 RBP=ffff888018b919f8 RSP=ffff888008d7fcb8 R8 =0000000000000001 R9 =ffffed10011aff8b R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888018bb2a48 R14=ffffffff813782a8 R15=ffff88800da2eb00 RIP=ffffffff8184636c RFL=00000046 [---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=00007ffde18ad000 CR3=000000000dc36000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8449ee3e RDX=ffff888015881b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000002 RSP=ffff88800fe97ce8 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000001 R11=0000000000000000 R12=0000000000000004 R13=ffff888015b15cc0 R14=00007f7ef18c4000 R15=00007f7ef18eefff RIP=ffffffff8449ee49 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7ef1529900 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=00007f7ef18c53ec CR3=000000000dc36000 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=6720646572637465733a4d41503d706f 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