[ 60.692093] BUG: Bad rss-counter state mm:00000000a7aa9634 type:MM_FILEPAGES val:33 [ 60.693657] BUG: Bad rss-counter state mm:00000000a7aa9634 type:MM_ANONPAGES val:22 [ 60.861296] ================================================================== [ 60.862279] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.863373] Read of size 8 at addr ffff88800e970ed8 by task sshd/219 [ 60.864309] [ 60.864526] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 60.865550] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.866723] Call Trace: [ 60.867107] [ 60.867442] dump_stack_lvl+0x91/0xf0 [ 60.868015] print_report+0xcc/0x620 [ 60.868602] ? __virt_addr_valid+0x102/0x340 [ 60.869285] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.870037] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.870797] kasan_report+0xbe/0xf0 [ 60.871373] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.872134] vma_interval_tree_remove+0xc75/0xec0 [ 60.872879] vma_prepare+0xc54/0x11a0 [ 60.873467] __split_vma+0x5af/0x950 [ 60.874063] ? __pfx___split_vma+0x10/0x10 [ 60.874739] ? find_held_lock+0x2c/0x110 [ 60.875312] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.875880] ? lock_is_held_type+0x9f/0x120 [ 60.876411] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.877018] ? mtree_range_walk+0x632/0x900 [ 60.877567] ? mas_walk+0x5c7/0x7c0 [ 60.878042] do_vmi_munmap+0x1f1/0x2b0 [ 60.878555] mmap_region+0x1f9/0x2660 [ 60.879042] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.879552] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.880279] ? __pfx_lock_acquire+0x10/0x10 [ 60.880810] ? __pfx_mmap_region+0x10/0x10 [ 60.881348] ? security_mmap_addr+0x7d/0xa0 [ 60.881875] ? get_unmapped_area+0x1f5/0x3f0 [ 60.882443] do_mmap+0x854/0xf00 [ 60.882888] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.883383] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.883946] ksys_mmap_pgoff+0x3af/0x500 [ 60.884453] do_syscall_64+0x3f/0x90 [ 60.884927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.885575] RIP: 0033:0x7f2b69f3ad82 [ 60.886034] 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 [ 60.888176] RSP: 002b:00007ffea10befc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.889084] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2b69f3ad82 [ 60.889931] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2b69374000 [ 60.890789] RBP: 00007f2b69374000 R08: 0000000000000009 R09: 0000000000001000 [ 60.891634] R10: 0000000000000812 R11: 0000000000000206 R12: 000056232ed2fec0 [ 60.892478] R13: 00007ffea10befe0 R14: 00007ffea10bf010 R15: 00007ffea10bf370 [ 60.893334] [ 60.893628] [ 60.893841] Allocated by task 211: [ 60.894273] kasan_save_stack+0x22/0x50 [ 60.894776] kasan_set_track+0x25/0x30 [ 60.895270] __kasan_slab_alloc+0x59/0x70 [ 60.895798] kmem_cache_alloc+0x16b/0x370 [ 60.896314] vm_area_dup+0x20/0x160 [ 60.896771] __split_vma+0x170/0x950 [ 60.897236] split_vma+0xc6/0x110 [ 60.897677] mprotect_fixup+0x8d2/0xb30 [ 60.898198] do_mprotect_pkey+0x87e/0xd40 [ 60.898722] __x64_sys_mprotect+0x78/0xc0 [ 60.899242] do_syscall_64+0x3f/0x90 [ 60.899718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.900360] [ 60.900577] Freed by task 211: [ 60.900971] kasan_save_stack+0x22/0x50 [ 60.901472] kasan_set_track+0x25/0x30 [ 60.901964] kasan_save_free_info+0x2b/0x50 [ 60.902501] __kasan_slab_free+0x10a/0x190 [ 60.903039] kmem_cache_free+0x10d/0x4d0 [ 60.903551] rcu_core+0x8c8/0x2860 [ 60.903994] __do_softirq+0x1b7/0x7d4 [ 60.904465] [ 60.904680] Last potentially related work creation: [ 60.905268] kasan_save_stack+0x22/0x50 [ 60.905775] __kasan_record_aux_stack+0x8e/0xa0 [ 60.906355] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.906998] remove_vma+0x139/0x170 [ 60.907458] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.908013] do_vmi_munmap+0x1f1/0x2b0 [ 60.908507] __vm_munmap+0x138/0x3a0 [ 60.908972] __x64_sys_munmap+0x59/0x80 [ 60.909475] do_syscall_64+0x3f/0x90 [ 60.909959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.910615] [ 60.910833] Second to last potentially related work creation: [ 60.911566] kasan_save_stack+0x22/0x50 [ 60.912071] __kasan_record_aux_stack+0x8e/0xa0 [ 60.912686] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.913328] remove_vma+0x139/0x170 [ 60.913773] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.914338] do_vmi_munmap+0x1f1/0x2b0 [ 60.914833] mmap_region+0x1f9/0x2660 [ 60.915322] do_mmap+0x854/0xf00 [ 60.915767] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.916266] ksys_mmap_pgoff+0x3af/0x500 [ 60.916774] do_syscall_64+0x3f/0x90 [ 60.917264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.917914] [ 60.918130] The buggy address belongs to the object at ffff88800e970e80 [ 60.918130] which belongs to the cache vm_area_struct of size 168 [ 60.919660] The buggy address is located 88 bytes inside of [ 60.919660] freed 168-byte region [ffff88800e970e80, ffff88800e970f28) [ 60.921050] [ 60.921264] The buggy address belongs to the physical page: [ 60.921921] page:00000000c88b820e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe970 [ 60.923024] memcg:ffff88800d152701 [ 60.923455] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.924149] page_type: 0xffffffff() [ 60.924597] raw: 0100000000000200 ffff88800879fc80 ffffea00003a1c80 dead000000000005 [ 60.925510] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d152701 [ 60.926438] page dumped because: kasan: bad access detected [ 60.927094] [ 60.927307] Memory state around the buggy address: [ 60.927884] ffff88800e970d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.928787] ffff88800e970e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 60.929659] >ffff88800e970e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.930512] ^ [ 60.931240] ffff88800e970f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 60.932102] ffff88800e970f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 60.932966] ================================================================== [ 60.933948] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 62.926604] BUG: Bad rss-counter state mm:00000000d497ed83 type:MM_FILEPAGES val:33 [ 62.927812] BUG: Bad rss-counter state mm:00000000d497ed83 type:MM_ANONPAGES val:22 [ 63.463328] BUG: Bad rss-counter state mm:00000000b95d3466 type:MM_FILEPAGES val:33 [ 63.464569] BUG: Bad rss-counter state mm:00000000b95d3466 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23863' (ECDSA) to the list of known hosts. 2023/06/19 16:30:20 fuzzer started 2023/06/19 16:30:20 dialing manager at localhost:44161 2023/06/19 16:30:20 checking machine... 2023/06/19 16:30:20 checking revisions... [ 64.155723] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:30:20 testing simple program... [ 64.215657] cgroup: Unknown subsys name 'net' [ 64.268978] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:29:50 Registers: info registers vcpu 0 RAX=ffff88800cb0cc80 RBX=ffff888016297d80 RCX=0000000000000000 RDX=ffff88801649b680 RSI=ffffffff8366cc74 RDI=0000000000000005 RBP=00000000000000f4 RSP=ffff888016297be0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000033fe0 R13=00000000ffffffa6 R14=0000000000000000 R15=ffff88800cb0cc80 RIP=ffffffff814c07e0 RFL=00000282 [--S----] 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 00007fba1c726900 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=00007fffef842000 CR3=000000001ca4e000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f71fc998160 CR3=000000000c9e4000 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=3be0891b327b3598f44e063682aedafd XMM02=0000000000122ee8eff9b2d0a8fce9cb XMM03=0000000000122fb82c67c8bc2e329bc3 XMM04=90330cdca241ebff00000000000ae988 XMM05=dfcdbad4f1609c37000000000013a330 XMM06=a82034116115f9110000000000139508 XMM07=e042d86d42eb936e00000000001293d0 XMM08=5237e600d52bdbdf0000000000122fb8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000