[ 31.064189] BUG: Bad rss-counter state mm:00000000057d2e7e type:MM_FILEPAGES val:33 [ 31.065422] BUG: Bad rss-counter state mm:00000000057d2e7e type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.212955] ================================================================== [ 31.214078] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.215189] Read of size 8 at addr ffff888009f8b798 by task sshd/219 [ 31.215973] [ 31.216193] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.217054] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.218083] Call Trace: [ 31.218405] [ 31.218693] dump_stack_lvl+0x91/0xf0 [ 31.219220] print_report+0xcc/0x620 [ 31.219713] ? __virt_addr_valid+0x102/0x340 [ 31.220269] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.220894] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.221526] kasan_report+0xbe/0xf0 [ 31.222040] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.222674] vma_interval_tree_remove+0xc75/0xec0 [ 31.223313] vma_prepare+0xc54/0x11a0 [ 31.223797] __split_vma+0x5af/0x950 [ 31.224269] ? __pfx___split_vma+0x10/0x10 [ 31.224803] ? find_held_lock+0x2c/0x110 [ 31.225337] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.225911] ? lock_is_held_type+0x9f/0x120 [ 31.226480] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.227130] ? mtree_range_walk+0x632/0x900 [ 31.227689] ? mas_walk+0x5c7/0x7c0 [ 31.228168] do_vmi_munmap+0x1f1/0x2b0 [ 31.228667] mmap_region+0x1f9/0x2660 [ 31.229169] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.229681] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.230415] ? __pfx_lock_acquire+0x10/0x10 [ 31.230953] ? __pfx_mmap_region+0x10/0x10 [ 31.231522] ? security_mmap_addr+0x7d/0xa0 [ 31.232212] ? get_unmapped_area+0x1f5/0x3f0 [ 31.232807] do_mmap+0x854/0xf00 [ 31.233292] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.233798] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.234393] ksys_mmap_pgoff+0x3af/0x500 [ 31.234906] do_syscall_64+0x3f/0x90 [ 31.235420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.236110] RIP: 0033:0x7fdf65876d82 [ 31.236574] 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 [ 31.238734] RSP: 002b:00007ffe75fd07c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.239682] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf65876d82 [ 31.240525] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf64cb0000 [ 31.241377] RBP: 00007fdf64cb0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.242245] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b36b7bdec0 [ 31.243127] R13: 00007ffe75fd07e0 R14: 00007ffe75fd0810 R15: 00007ffe75fd0b70 [ 31.243992] [ 31.244290] [ 31.244511] Allocated by task 212: [ 31.244942] kasan_save_stack+0x22/0x50 [ 31.245450] kasan_set_track+0x25/0x30 [ 31.245945] __kasan_slab_alloc+0x59/0x70 [ 31.246529] kmem_cache_alloc+0x16b/0x370 [ 31.247094] vm_area_dup+0x20/0x160 [ 31.247559] __split_vma+0x170/0x950 [ 31.248031] split_vma+0xc6/0x110 [ 31.248474] mprotect_fixup+0x8d2/0xb30 [ 31.248982] do_mprotect_pkey+0x87e/0xd40 [ 31.249506] __x64_sys_mprotect+0x78/0xc0 [ 31.250050] do_syscall_64+0x3f/0x90 [ 31.250525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.251208] [ 31.251430] Freed by task 212: [ 31.251827] kasan_save_stack+0x22/0x50 [ 31.252336] kasan_set_track+0x25/0x30 [ 31.252832] kasan_save_free_info+0x2b/0x50 [ 31.253368] __kasan_slab_free+0x10a/0x190 [ 31.253906] kmem_cache_free+0x10d/0x4d0 [ 31.254439] rcu_core+0x8c8/0x2860 [ 31.254884] __do_softirq+0x1b7/0x7d4 [ 31.255432] [ 31.255650] Last potentially related work creation: [ 31.256248] kasan_save_stack+0x22/0x50 [ 31.256755] __kasan_record_aux_stack+0x8e/0xa0 [ 31.257348] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.258019] remove_vma+0x139/0x170 [ 31.258491] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.259084] do_vmi_munmap+0x1f1/0x2b0 [ 31.259576] __vm_munmap+0x138/0x3a0 [ 31.260045] __x64_sys_munmap+0x59/0x80 [ 31.260561] do_syscall_64+0x3f/0x90 [ 31.261037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.261700] [ 31.261922] Second to last potentially related work creation: [ 31.262641] kasan_save_stack+0x22/0x50 [ 31.263188] __kasan_record_aux_stack+0x8e/0xa0 [ 31.263785] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.264454] remove_vma+0x139/0x170 [ 31.264914] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.265487] do_vmi_munmap+0x1f1/0x2b0 [ 31.265983] mmap_region+0x1f9/0x2660 [ 31.266482] do_mmap+0x854/0xf00 [ 31.266919] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.267455] ksys_mmap_pgoff+0x3af/0x500 [ 31.267967] do_syscall_64+0x3f/0x90 [ 31.268465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.269112] [ 31.269342] The buggy address belongs to the object at ffff888009f8b740 [ 31.269342] which belongs to the cache vm_area_struct of size 168 [ 31.270848] The buggy address is located 88 bytes inside of [ 31.270848] freed 168-byte region [ffff888009f8b740, ffff888009f8b7e8) [ 31.272664] [ 31.272940] The buggy address belongs to the physical page: [ 31.273782] page:00000000c913f4f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9f8b [ 31.275173] memcg:ffff88800fe60d01 [ 31.275725] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.276623] page_type: 0xffffffff() [ 31.277208] raw: 0100000000000200 ffff8880087a0c80 ffffea000064ebc0 dead000000000007 [ 31.278394] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe60d01 [ 31.279535] page dumped because: kasan: bad access detected [ 31.280387] [ 31.280668] Memory state around the buggy address: [ 31.281422] ffff888009f8b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.282464] ffff888009f8b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.283336] >ffff888009f8b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.284202] ^ [ 31.284689] ffff888009f8b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.285560] ffff888009f8b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.286442] ================================================================== [ 31.287428] Disabling lock debugging due to kernel taint [ 33.185659] BUG: Bad rss-counter state mm:00000000bf57313f type:MM_FILEPAGES val:33 [ 33.186853] BUG: Bad rss-counter state mm:00000000bf57313f type:MM_ANONPAGES val:22 [ 33.643644] BUG: Bad rss-counter state mm:00000000586c429b type:MM_FILEPAGES val:33 [ 33.645409] BUG: Bad rss-counter state mm:00000000586c429b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32613' (ECDSA) to the list of known hosts. 2023/06/21 01:20:21 fuzzer started 2023/06/21 01:20:22 dialing manager at localhost:36067 2023/06/21 01:20:22 checking machine... 2023/06/21 01:20:22 checking revisions... [ 34.390461] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:20:22 testing simple program... [ 34.445491] cgroup: Unknown subsys name 'net' [ 34.484309] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:20:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018f11680 RCX=ffffffff81b28f30 RDX=000000000000005a RSI=0000000000000ac1 RDI=ffffea0000692500 RBP=ffffea0000692500 RSP=ffff88800fedf9d8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=ffff888018f118a8 R14=0000000000000ac1 R15=0000000000000000 RIP=ffffffff81979a16 RFL=00000293 [--S-A-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 00007f6306e32700 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=00007f61b31a9618 CR3=000000000d262000 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=2031323a30323a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a30323a3130203132 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=0000000000000001 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=00007f82f731e030 CR3=000000000c5ee000 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=7cc6c0966bf2e88e1d4dc0539280b943 XMM02=2c67c8bc2e329bc300000000001208d8 XMM03=fb795ef6d65770560000000000122e68 XMM04=9171255fc21f60db00000000000ae988 XMM05=dfcdbad4f1609c370000000000133dc0 XMM06=806171799158d9670000000000133c48 XMM07=e042d86d42eb936e0000000000123140 XMM08=9b50813b85bb1cee0000000000120938 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000