[ 31.211123] BUG: Bad rss-counter state mm:00000000e39823a5 type:MM_FILEPAGES val:33 [ 31.212327] BUG: Bad rss-counter state mm:00000000e39823a5 type:MM_ANONPAGES val:22 [ 31.247107] ================================================================== [ 31.248452] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.249878] Read of size 8 at addr ffff8880164cfb38 by task sshd/219 [ 31.250967] [ 31.251255] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.252531] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.253888] Call Trace: [ 31.254330] <TASK> [ 31.254729] dump_stack_lvl+0x91/0xf0 [ 31.255389] print_report+0xcc/0x620 [ 31.256087] ? __virt_addr_valid+0x102/0x340 [ 31.256807] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.257705] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.258496] kasan_report+0xbe/0xf0 [ 31.259107] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.259886] vma_interval_tree_remove+0xc75/0xec0 [ 31.260687] vma_prepare+0xc54/0x11a0 [ 31.261311] __split_vma+0x5af/0x950 [ 31.262077] ? __pfx___split_vma+0x10/0x10 [ 31.262790] ? find_held_lock+0x2c/0x110 [ 31.263453] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.264339] ? lock_is_held_type+0x9f/0x120 [ 31.265132] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.265998] ? mtree_range_walk+0x632/0x900 [ 31.266735] ? mas_walk+0x5c7/0x7c0 [ 31.267426] do_vmi_munmap+0x1f1/0x2b0 [ 31.268185] mmap_region+0x1f9/0x2660 [ 31.268949] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.269564] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.270422] ? __pfx_lock_acquire+0x10/0x10 [ 31.271071] ? __pfx_mmap_region+0x10/0x10 [ 31.271702] ? security_mmap_addr+0x7d/0xa0 [ 31.272558] ? get_unmapped_area+0x1f5/0x3f0 [ 31.273194] do_mmap+0x854/0xf00 [ 31.273722] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.274334] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.275019] ksys_mmap_pgoff+0x3af/0x500 [ 31.275636] do_syscall_64+0x3f/0x90 [ 31.276211] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.277020] RIP: 0033:0x7fa700dd7d82 [ 31.277474] 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 [ 31.279551] RSP: 002b:00007ffd71bcb308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.280439] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa700dd7d82 [ 31.281283] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa700211000 [ 31.282113] RBP: 00007fa700211000 R08: 0000000000000009 R09: 0000000000001000 [ 31.282951] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561098956ec0 [ 31.283780] R13: 00007ffd71bcb320 R14: 00007ffd71bcb350 R15: 00007ffd71bcb6b0 [ 31.284635] </TASK> [ 31.284924] [ 31.285134] Allocated by task 212: [ 31.285555] kasan_save_stack+0x22/0x50 [ 31.286051] kasan_set_track+0x25/0x30 [ 31.286539] __kasan_slab_alloc+0x59/0x70 [ 31.287053] kmem_cache_alloc+0x16b/0x370 [ 31.287560] vm_area_dup+0x20/0x160 [ 31.288013] __split_vma+0x170/0x950 [ 31.288474] split_vma+0xc6/0x110 [ 31.288926] mprotect_fixup+0x8d2/0xb30 [ 31.289423] do_mprotect_pkey+0x87e/0xd40 [ 31.289940] __x64_sys_mprotect+0x78/0xc0 [ 31.290452] do_syscall_64+0x3f/0x90 [ 31.290918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.291557] [ 31.291771] Freed by task 212: [ 31.292163] kasan_save_stack+0x22/0x50 [ 31.292662] kasan_set_track+0x25/0x30 [ 31.293144] kasan_save_free_info+0x2b/0x50 [ 31.293666] __kasan_slab_free+0x10a/0x190 [ 31.294189] kmem_cache_free+0x10d/0x4d0 [ 31.294685] rcu_core+0x8c8/0x2860 [ 31.295121] __do_softirq+0x1b7/0x7d4 [ 31.295590] [ 31.295805] Last potentially related work creation: [ 31.296381] kasan_save_stack+0x22/0x50 [ 31.296883] __kasan_record_aux_stack+0x8e/0xa0 [ 31.297442] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.298081] remove_vma+0x139/0x170 [ 31.298531] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.299078] do_vmi_munmap+0x1f1/0x2b0 [ 31.299554] __vm_munmap+0x138/0x3a0 [ 31.300014] __x64_sys_munmap+0x59/0x80 [ 31.300517] do_syscall_64+0x3f/0x90 [ 31.300985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.301619] [ 31.301829] The buggy address belongs to the object at ffff8880164cfae0 [ 31.301829] which belongs to the cache vm_area_struct of size 168 [ 31.303267] The buggy address is located 88 bytes inside of [ 31.303267] freed 168-byte region [ffff8880164cfae0, ffff8880164cfb88) [ 31.304656] [ 31.304867] The buggy address belongs to the physical page: [ 31.305513] page:000000007248a72a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164cf [ 31.306586] memcg:ffff88800ef4b301 [ 31.307009] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.307694] page_type: 0xffffffff() [ 31.308143] raw: 0100000000000200 ffff8880087a0c80 ffffea000037c380 000000000000000d [ 31.309056] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef4b301 [ 31.309951] page dumped because: kasan: bad access detected [ 31.310600] [ 31.310815] Memory state around the buggy address: [ 31.311392] ffff8880164cfa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.312228] ffff8880164cfa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.313077] >ffff8880164cfb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.313918] ^ [ 31.314517] ffff8880164cfb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.315363] ffff8880164cfc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.316203] ================================================================== [ 31.317419] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.441409] BUG: Bad rss-counter state mm:00000000849fe936 type:MM_FILEPAGES val:33 [ 33.442448] BUG: Bad rss-counter state mm:00000000849fe936 type:MM_ANONPAGES val:22 [ 34.025989] BUG: Bad rss-counter state mm:00000000bfe371be type:MM_FILEPAGES val:33 [ 34.027283] BUG: Bad rss-counter state mm:00000000bfe371be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45840' (ECDSA) to the list of known hosts. 2023/06/21 01:22:17 fuzzer started 2023/06/21 01:22:18 dialing manager at localhost:36067 2023/06/21 01:22:18 checking machine... 2023/06/21 01:22:18 checking revisions... [ 34.686713] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:22:18 testing simple program... [ 34.740736] cgroup: Unknown subsys name 'net' [ 34.801874] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:22:17 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d86ea RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff8880146a7420 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000b4a00000b4a R12=ffffffff8560b640 R13=ffffffff83ab1b1f R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff8180f0a8 RFL=00000283 [--S---C] 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 00007fa3af477900 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=00007fa3afa2e618 CR3=0000000019ee0000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=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 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=00007f2986a7dc40 CR3=0000000010242000 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=c3d74fde4bac4bbac1441cd86c0f247b XMM02=000000000011a970ec2efd57dc4c00df XMM03=00000000001213106eb9602017b74eb7 XMM04=6a83a42ea1e4b77a00000000000ae988 XMM05=dfcdbad4f1609c370000000000130f28 XMM06=806171799158d9670000000000130db0 XMM07=e042d86d42eb936e0000000000121590 XMM08=6eb9602017b74eb7000000000011a9d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000