[ 32.777545] BUG: Bad rss-counter state mm:000000009975e314 type:MM_FILEPAGES val:33 [ 32.779543] BUG: Bad rss-counter state mm:000000009975e314 type:MM_ANONPAGES val:22 [ 32.937742] ================================================================== [ 32.938814] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.939937] Read of size 8 at addr ffff8880191ac3f8 by task sshd/218 [ 32.940998] [ 32.941257] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.942267] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.943503] Call Trace: [ 32.943886] [ 32.944221] dump_stack_lvl+0x91/0xf0 [ 32.944800] print_report+0xcc/0x620 [ 32.945369] ? __virt_addr_valid+0x102/0x340 [ 32.946017] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.946755] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.947497] kasan_report+0xbe/0xf0 [ 32.948061] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.948808] vma_interval_tree_remove+0xc75/0xec0 [ 32.949523] vma_prepare+0xc54/0x11a0 [ 32.950095] __split_vma+0x5af/0x950 [ 32.950657] ? __pfx___split_vma+0x10/0x10 [ 32.951325] ? find_held_lock+0x2c/0x110 [ 32.951965] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.952657] ? lock_is_held_type+0x9f/0x120 [ 32.953302] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.954039] ? mtree_range_walk+0x632/0x900 [ 32.954778] ? mas_walk+0x5c7/0x7c0 [ 32.955364] do_vmi_munmap+0x1f1/0x2b0 [ 32.955962] mmap_region+0x1f9/0x2660 [ 32.956540] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.957169] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.958027] ? __pfx_lock_acquire+0x10/0x10 [ 32.958661] ? __pfx_mmap_region+0x10/0x10 [ 32.959303] ? security_mmap_addr+0x7d/0xa0 [ 32.959946] ? get_unmapped_area+0x1f5/0x3f0 [ 32.960611] do_mmap+0x854/0xf00 [ 32.961141] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.961745] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.962419] ksys_mmap_pgoff+0x3af/0x500 [ 32.963024] do_syscall_64+0x3f/0x90 [ 32.963619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.964391] RIP: 0033:0x7f5d840fdd82 [ 32.964941] 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 [ 32.967514] RSP: 002b:00007ffcf705e918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.968604] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d840fdd82 [ 32.969617] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d83537000 [ 32.970617] RBP: 00007f5d83537000 R08: 0000000000000009 R09: 0000000000001000 [ 32.971650] R10: 0000000000000812 R11: 0000000000000206 R12: 00005646d4e49b20 [ 32.972650] R13: 00007ffcf705e930 R14: 00007ffcf705e960 R15: 00007ffcf705ecc0 [ 32.973666] [ 32.974011] [ 32.974265] Allocated by task 211: [ 32.974773] kasan_save_stack+0x22/0x50 [ 32.975373] kasan_set_track+0x25/0x30 [ 32.975963] __kasan_slab_alloc+0x59/0x70 [ 32.976602] kmem_cache_alloc+0x16b/0x370 [ 32.977242] vm_area_dup+0x20/0x160 [ 32.977803] __split_vma+0x170/0x950 [ 32.978381] split_vma+0xc6/0x110 [ 32.978927] mprotect_fixup+0x8d2/0xb30 [ 32.979546] do_mprotect_pkey+0x87e/0xd40 [ 32.980188] __x64_sys_mprotect+0x78/0xc0 [ 32.980796] do_syscall_64+0x3f/0x90 [ 32.981347] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.982154] [ 32.982406] Freed by task 211: [ 32.982861] kasan_save_stack+0x22/0x50 [ 32.983463] kasan_set_track+0x25/0x30 [ 32.984044] kasan_save_free_info+0x2b/0x50 [ 32.984664] __kasan_slab_free+0x10a/0x190 [ 32.985289] kmem_cache_free+0x10d/0x4d0 [ 32.985877] rcu_core+0x8c8/0x2860 [ 32.986393] __do_softirq+0x1b7/0x7d4 [ 32.986943] [ 32.987196] Last potentially related work creation: [ 32.987886] kasan_save_stack+0x22/0x50 [ 32.988477] __kasan_record_aux_stack+0x8e/0xa0 [ 32.989139] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.989892] remove_vma+0x139/0x170 [ 32.990425] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.991076] do_vmi_munmap+0x1f1/0x2b0 [ 32.991663] __vm_munmap+0x138/0x3a0 [ 32.992207] __x64_sys_munmap+0x59/0x80 [ 32.992783] do_syscall_64+0x3f/0x90 [ 32.993325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.994070] [ 32.994316] The buggy address belongs to the object at ffff8880191ac3a0 [ 32.994316] which belongs to the cache vm_area_struct of size 168 [ 32.996020] The buggy address is located 88 bytes inside of [ 32.996020] freed 168-byte region [ffff8880191ac3a0, ffff8880191ac448) [ 32.997636] [ 32.997889] The buggy address belongs to the physical page: [ 32.998648] page:000000007626a53a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x191ac [ 32.999922] memcg:ffff888016fc2601 [ 33.000409] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.001179] page_type: 0xffffffff() [ 33.001729] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.002862] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016fc2601 [ 33.003958] page dumped because: kasan: bad access detected [ 33.004781] [ 33.005040] Memory state around the buggy address: [ 33.005753] ffff8880191ac280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.006793] ffff8880191ac300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.007847] >ffff8880191ac380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.008858] ^ [ 33.009856] ffff8880191ac400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.010826] ffff8880191ac480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.011810] ================================================================== [ 33.012947] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.355302] BUG: Bad rss-counter state mm:0000000059650d52 type:MM_FILEPAGES val:33 [ 35.356323] BUG: Bad rss-counter state mm:0000000059650d52 type:MM_ANONPAGES val:22 [ 35.753493] BUG: Bad rss-counter state mm:000000000e2a59c6 type:MM_FILEPAGES val:33 [ 35.754501] BUG: Bad rss-counter state mm:000000000e2a59c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51298' (ECDSA) to the list of known hosts. 2023/06/19 12:10:22 fuzzer started 2023/06/19 12:10:22 dialing manager at localhost:44161 2023/06/19 12:10:22 checking machine... 2023/06/19 12:10:22 checking revisions... [ 36.507388] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:10:22 testing simple program... [ 36.556825] cgroup: Unknown subsys name 'net' [ 36.607771] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:10:19 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffc87c9a848 CR3=0000000005482000 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=00007f816bebc5100000558827821790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000000f4 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800bf17b01 RSI=ffff88800bf17bb8 RDI=ffff88800bf17bb8 RBP=ffff88800bf17700 RSP=ffff88800bf17638 R8 =0000000000000001 R9 =ffff88800bf176e8 R10=0000000000038001 R11=0000000000091bd6 R12=ffff88800bf17708 R13=ffff88800bf176f0 R14=ffff88800bf17bb8 R15=ffff88800bf176a8 RIP=ffffffff81131236 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdc67ce7900 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=00007ffda7506000 CR3=000000000f29e000 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