[ 27.394858] BUG: Bad rss-counter state mm:00000000c11c2978 type:MM_FILEPAGES val:33 [ 27.395878] BUG: Bad rss-counter state mm:00000000c11c2978 type:MM_ANONPAGES val:22 [ 27.579268] ================================================================== [ 27.580450] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.581676] Read of size 8 at addr ffff888009efa3f8 by task sshd/218 [ 27.582749] [ 27.583015] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.584042] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.585234] Call Trace: [ 27.585638] [ 27.585990] dump_stack_lvl+0x91/0xf0 [ 27.586631] print_report+0xcc/0x620 [ 27.587227] ? __virt_addr_valid+0x102/0x340 [ 27.587821] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.588433] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.589050] kasan_report+0xbe/0xf0 [ 27.589532] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.590153] vma_interval_tree_remove+0xc75/0xec0 [ 27.590761] vma_prepare+0xc54/0x11a0 [ 27.591250] __split_vma+0x5af/0x950 [ 27.591724] ? __pfx___split_vma+0x10/0x10 [ 27.592268] ? find_held_lock+0x2c/0x110 [ 27.592802] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.593381] ? lock_is_held_type+0x9f/0x120 [ 27.593918] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.594534] ? mtree_range_walk+0x632/0x900 [ 27.595081] ? mas_walk+0x5c7/0x7c0 [ 27.595556] do_vmi_munmap+0x1f1/0x2b0 [ 27.596049] mmap_region+0x1f9/0x2660 [ 27.596540] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.597056] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.597767] ? __pfx_lock_acquire+0x10/0x10 [ 27.598310] ? __pfx_mmap_region+0x10/0x10 [ 27.598870] ? security_mmap_addr+0x7d/0xa0 [ 27.599406] ? get_unmapped_area+0x1f5/0x3f0 [ 27.599961] do_mmap+0x854/0xf00 [ 27.600405] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.600897] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.601459] ksys_mmap_pgoff+0x3af/0x500 [ 27.601970] do_syscall_64+0x3f/0x90 [ 27.602456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.603118] RIP: 0033:0x7f2aaf7bdd82 [ 27.603582] 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 [ 27.605704] RSP: 002b:00007ffe7c8b6f28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.606619] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2aaf7bdd82 [ 27.607467] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2aaebf7000 [ 27.608311] RBP: 00007f2aaebf7000 R08: 0000000000000009 R09: 0000000000001000 [ 27.609169] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c89c007ec0 [ 27.610032] R13: 00007ffe7c8b6f40 R14: 00007ffe7c8b6f70 R15: 00007ffe7c8b72d0 [ 27.610924] [ 27.611219] [ 27.611437] Allocated by task 211: [ 27.611867] kasan_save_stack+0x22/0x50 [ 27.612379] kasan_set_track+0x25/0x30 [ 27.612891] __kasan_slab_alloc+0x59/0x70 [ 27.613422] kmem_cache_alloc+0x16b/0x370 [ 27.613950] vm_area_dup+0x20/0x160 [ 27.614414] __split_vma+0x170/0x950 [ 27.614894] split_vma+0xc6/0x110 [ 27.615337] mprotect_fixup+0x8d2/0xb30 [ 27.615842] do_mprotect_pkey+0x87e/0xd40 [ 27.616364] __x64_sys_mprotect+0x78/0xc0 [ 27.616897] do_syscall_64+0x3f/0x90 [ 27.617375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.618018] [ 27.618232] Freed by task 211: [ 27.618639] kasan_save_stack+0x22/0x50 [ 27.619154] kasan_set_track+0x25/0x30 [ 27.619647] kasan_save_free_info+0x2b/0x50 [ 27.620183] __kasan_slab_free+0x10a/0x190 [ 27.620719] kmem_cache_free+0x10d/0x4d0 [ 27.621224] rcu_core+0x8c8/0x2860 [ 27.621675] __do_softirq+0x1b7/0x7d4 [ 27.622150] [ 27.622377] Last potentially related work creation: [ 27.622973] kasan_save_stack+0x22/0x50 [ 27.623477] __kasan_record_aux_stack+0x8e/0xa0 [ 27.624066] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.624712] remove_vma+0x139/0x170 [ 27.625166] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.625718] do_vmi_munmap+0x1f1/0x2b0 [ 27.626206] __vm_munmap+0x138/0x3a0 [ 27.626682] __x64_sys_munmap+0x59/0x80 [ 27.627175] do_syscall_64+0x3f/0x90 [ 27.627646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.628286] [ 27.628503] The buggy address belongs to the object at ffff888009efa3a0 [ 27.628503] which belongs to the cache vm_area_struct of size 168 [ 27.629977] The buggy address is located 88 bytes inside of [ 27.629977] freed 168-byte region [ffff888009efa3a0, ffff888009efa448) [ 27.631402] [ 27.631616] The buggy address belongs to the physical page: [ 27.632274] page:0000000093a35ced refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9efa [ 27.633355] memcg:ffff88800d20d201 [ 27.633785] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 27.634492] page_type: 0xffffffff() [ 27.634942] raw: 0100000000000200 ffff88800879fc80 ffffea0000380ec0 dead000000000007 [ 27.635867] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d20d201 [ 27.636769] page dumped because: kasan: bad access detected [ 27.637437] [ 27.637654] Memory state around the buggy address: [ 27.638230] ffff888009efa280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 27.639100] ffff888009efa300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 27.639956] >ffff888009efa380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 27.640810] ^ [ 27.641661] ffff888009efa400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 27.642542] ffff888009efa480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.643402] ================================================================== [ 27.644673] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.864159] BUG: Bad rss-counter state mm:000000006b616bd1 type:MM_FILEPAGES val:33 [ 29.865338] BUG: Bad rss-counter state mm:000000006b616bd1 type:MM_ANONPAGES val:22 [ 30.310057] BUG: Bad rss-counter state mm:0000000029fa79f2 type:MM_FILEPAGES val:33 [ 30.311001] BUG: Bad rss-counter state mm:0000000029fa79f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12856' (ECDSA) to the list of known hosts. 2023/06/20 07:58:22 fuzzer started 2023/06/20 07:58:23 dialing manager at localhost:44161 2023/06/20 07:58:23 checking machine... 2023/06/20 07:58:23 checking revisions... [ 30.975922] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:58:23 testing simple program... [ 31.025931] cgroup: Unknown subsys name 'net' [ 31.095892] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:58:19 Registers: info registers vcpu 0 RAX=fbfbfbfbfbfbfbfb RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=ffffed10034f0b72 RBP=ffffffff813782a8 RSP=ffff888008d7fce0 R8 =0000000000000002 R9 =0000000000000006 R10=ffffed10034f0b56 R11=0000000000000128 R12=ffff88801a785ab0 R13=ffff88800844f780 R14=ffffffff813782a8 R15=ffff88801a785b30 RIP=ffffffff8450d454 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 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=00007f1d3be0d0b0 CR3=0000000018fd6000 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=38353a3730203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343134 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=ffff888008c58400 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=00007f3bf358a500 CR3=000000000d5fe000 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=b01d707596f08ca6634c4c2e374a5419 XMM02=000000000011fab0eff9b2d0a8fce9cb XMM03=000000000011fb802c67c8bc2e329bc3 XMM04=69dfcd2f4486e13200000000000ae988 XMM05=dfcdbad4f1609c370000000000133350 XMM06=54f8d429bbc2c2fc0000000000132528 XMM07=e042d86d42eb936e0000000000123a48 XMM08=62b41555543b2524000000000011fb80 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000