[ 23.773590] BUG: Bad rss-counter state mm:00000000c2bb75d8 type:MM_FILEPAGES val:33 [ 23.775737] BUG: Bad rss-counter state mm:00000000c2bb75d8 type:MM_ANONPAGES val:22 [ 23.946825] ================================================================== [ 23.947758] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.948709] Read of size 8 at addr ffff88800cb10880 by task sshd/219 [ 23.949500] [ 23.949721] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.950787] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.951788] Call Trace: [ 23.952112] [ 23.952409] dump_stack_lvl+0x91/0xf0 [ 23.952956] print_report+0xcc/0x620 [ 23.953467] ? __virt_addr_valid+0x102/0x340 [ 23.954018] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.954653] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.955278] kasan_report+0xbe/0xf0 [ 23.955759] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.956374] vma_interval_tree_remove+0xc75/0xec0 [ 23.956980] vma_prepare+0xc54/0x11a0 [ 23.957462] __split_vma+0x5af/0x950 [ 23.957935] ? __pfx___split_vma+0x10/0x10 [ 23.958468] ? find_held_lock+0x2c/0x110 [ 23.958995] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.959554] ? lock_is_held_type+0x9f/0x120 [ 23.960096] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.960702] ? mtree_range_walk+0x632/0x900 [ 23.961261] ? mas_walk+0x5c7/0x7c0 [ 23.961739] do_vmi_munmap+0x1f1/0x2b0 [ 23.962234] mmap_region+0x1f9/0x2660 [ 23.962736] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.963256] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.963983] ? __pfx_lock_acquire+0x10/0x10 [ 23.964523] ? __pfx_mmap_region+0x10/0x10 [ 23.965052] ? security_mmap_addr+0x7d/0xa0 [ 23.965588] ? get_unmapped_area+0x1f5/0x3f0 [ 23.966137] do_mmap+0x854/0xf00 [ 23.966584] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.967082] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.967649] ksys_mmap_pgoff+0x3af/0x500 [ 23.968152] do_syscall_64+0x3f/0x90 [ 23.968633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.969278] RIP: 0033:0x7fda7eb89d82 [ 23.969738] 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 [ 23.971904] RSP: 002b:00007ffecfc465f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.972812] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fda7eb89d82 [ 23.973672] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fda7dfc3000 [ 23.974528] RBP: 00007fda7dfc3000 R08: 0000000000000009 R09: 0000000000001000 [ 23.975381] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a3c4b0ec0 [ 23.976223] R13: 00007ffecfc46610 R14: 00007ffecfc46640 R15: 00007ffecfc469a0 [ 23.977079] [ 23.977370] [ 23.977587] Allocated by task 212: [ 23.978014] kasan_save_stack+0x22/0x50 [ 23.978536] kasan_set_track+0x25/0x30 [ 23.979026] __kasan_slab_alloc+0x59/0x70 [ 23.979549] kmem_cache_alloc+0x16b/0x370 [ 23.980062] vm_area_dup+0x20/0x160 [ 23.980515] __split_vma+0x170/0x950 [ 23.980987] split_vma+0xc6/0x110 [ 23.981433] mprotect_fixup+0x8d2/0xb30 [ 23.981936] do_mprotect_pkey+0x87e/0xd40 [ 23.982468] __x64_sys_mprotect+0x78/0xc0 [ 23.982989] do_syscall_64+0x3f/0x90 [ 23.983468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.984117] [ 23.984331] Freed by task 212: [ 23.984726] kasan_save_stack+0x22/0x50 [ 23.985237] kasan_set_track+0x25/0x30 [ 23.985739] kasan_save_free_info+0x2b/0x50 [ 23.986271] __kasan_slab_free+0x10a/0x190 [ 23.986817] kmem_cache_free+0x10d/0x4d0 [ 23.987337] rcu_core+0x8c8/0x2860 [ 23.987778] __do_softirq+0x1b7/0x7d4 [ 23.988269] [ 23.988484] Last potentially related work creation: [ 23.989065] kasan_save_stack+0x22/0x50 [ 23.989571] __kasan_record_aux_stack+0x8e/0xa0 [ 23.990150] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.990834] remove_vma+0x139/0x170 [ 23.991303] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.991914] do_vmi_munmap+0x1f1/0x2b0 [ 23.992444] __vm_munmap+0x138/0x3a0 [ 23.992927] __x64_sys_munmap+0x59/0x80 [ 23.993448] do_syscall_64+0x3f/0x90 [ 23.993941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.994619] [ 23.994843] The buggy address belongs to the object at ffff88800cb10828 [ 23.994843] which belongs to the cache vm_area_struct of size 168 [ 23.996364] The buggy address is located 88 bytes inside of [ 23.996364] freed 168-byte region [ffff88800cb10828, ffff88800cb108d0) [ 23.997818] [ 23.998042] The buggy address belongs to the physical page: [ 23.998741] page:0000000009eef320 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb10 [ 23.999871] memcg:ffff88800de48001 [ 24.000321] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.001060] page_type: 0xffffffff() [ 24.001532] raw: 0100000000000200 ffff8880087a0c80 ffffea0000380e00 dead000000000003 [ 24.002488] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de48001 [ 24.003425] page dumped because: kasan: bad access detected [ 24.004108] [ 24.004334] Memory state around the buggy address: [ 24.004939] ffff88800cb10780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.005824] ffff88800cb10800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.006739] >ffff88800cb10880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.007630] ^ [ 24.008055] ffff88800cb10900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.008941] ffff88800cb10980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 24.009833] ================================================================== [ 24.010782] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.054218] BUG: Bad rss-counter state mm:0000000049ee7d7d type:MM_FILEPAGES val:33 [ 26.055209] BUG: Bad rss-counter state mm:0000000049ee7d7d type:MM_ANONPAGES val:22 [ 26.524766] BUG: Bad rss-counter state mm:00000000d39801fc type:MM_FILEPAGES val:33 [ 26.526019] BUG: Bad rss-counter state mm:00000000d39801fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52365' (ECDSA) to the list of known hosts. 2023/06/20 12:09:10 fuzzer started 2023/06/20 12:09:10 dialing manager at localhost:36067 2023/06/20 12:09:10 checking machine... 2023/06/20 12:09:10 checking revisions... [ 27.224796] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:09:10 testing simple program... [ 27.266602] cgroup: Unknown subsys name 'net' [ 27.333034] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:09:10 Registers: info registers vcpu 0 RAX=ffffffff8118b640 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888008d90000 RSI=ffffffff8121b38c RDI=0000000000000000 RBP=ffff8880087a6280 RSP=ffff888008d9fec8 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=0000000000000128 R12=ffffffff854e8ec0 R13=ffff8880087a6284 R14=ffff888008d90000 R15=0000000000000000 RIP=ffffffff8118b644 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 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=00007f1f6d9258d0 CR3=000000000d74a000 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=68d3ea555caab9954c4698d728f971fd XMM02=000000000011a5e8ec2efd57dc4c00df XMM03=0000000000121470a6851c3af6eabff9 XMM04=a657b44218f1466600000000000ae988 XMM05=5c074ac155078c3d00000000001319b8 XMM06=806171799158d9670000000000131128 XMM07=e042d86d42eb936e00000000001216f0 XMM08=a6851c3af6eabff9000000000011a648 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000002106c RBX=ffff88806cf35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff888019c47990 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff8880181bb920 R15=0000000000000000 RIP=ffffffff8135b973 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 00007f26518c2900 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=00007ffc1b338000 CR3=000000000e1ea000 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