[ 26.141731] BUG: Bad rss-counter state mm:000000004527f357 type:MM_FILEPAGES val:33 [ 26.143391] BUG: Bad rss-counter state mm:000000004527f357 type:MM_ANONPAGES val:22 [ 26.297987] ================================================================== [ 26.298906] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.299860] Read of size 8 at addr ffff888010298140 by task sshd/219 [ 26.300634] [ 26.300852] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.301869] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.302852] Call Trace: [ 26.303174] [ 26.303478] dump_stack_lvl+0x91/0xf0 [ 26.303977] print_report+0xcc/0x620 [ 26.304499] ? __virt_addr_valid+0x102/0x340 [ 26.305164] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.305895] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.306628] kasan_report+0xbe/0xf0 [ 26.307201] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.307980] vma_interval_tree_remove+0xc75/0xec0 [ 26.308649] vma_prepare+0xc54/0x11a0 [ 26.309129] __split_vma+0x5af/0x950 [ 26.309605] ? __pfx___split_vma+0x10/0x10 [ 26.310134] ? find_held_lock+0x2c/0x110 [ 26.310657] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.311220] ? lock_is_held_type+0x9f/0x120 [ 26.311769] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.312379] ? mtree_range_walk+0x632/0x900 [ 26.312933] ? mas_walk+0x5c7/0x7c0 [ 26.313405] do_vmi_munmap+0x1f1/0x2b0 [ 26.313904] mmap_region+0x1f9/0x2660 [ 26.314384] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.314896] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.315620] ? __pfx_lock_acquire+0x10/0x10 [ 26.316159] ? __pfx_mmap_region+0x10/0x10 [ 26.316688] ? security_mmap_addr+0x7d/0xa0 [ 26.317221] ? get_unmapped_area+0x1f5/0x3f0 [ 26.317777] do_mmap+0x854/0xf00 [ 26.318214] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.318711] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.319277] ksys_mmap_pgoff+0x3af/0x500 [ 26.319813] do_syscall_64+0x3f/0x90 [ 26.320290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.320940] RIP: 0033:0x7ff4bf04ed82 [ 26.321403] 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 [ 26.323551] RSP: 002b:00007ffe16d90098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.324465] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff4bf04ed82 [ 26.325318] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff4be488000 [ 26.326164] RBP: 00007ff4be488000 R08: 0000000000000009 R09: 0000000000001000 [ 26.327013] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563956d56ec0 [ 26.327868] R13: 00007ffe16d900b0 R14: 00007ffe16d900e0 R15: 00007ffe16d90440 [ 26.328760] [ 26.329055] [ 26.329275] Allocated by task 212: [ 26.329700] kasan_save_stack+0x22/0x50 [ 26.330204] kasan_set_track+0x25/0x30 [ 26.330705] __kasan_slab_alloc+0x59/0x70 [ 26.331228] kmem_cache_alloc+0x16b/0x370 [ 26.331778] vm_area_dup+0x20/0x160 [ 26.332234] __split_vma+0x170/0x950 [ 26.332701] split_vma+0xc6/0x110 [ 26.333147] mprotect_fixup+0x8d2/0xb30 [ 26.333663] do_mprotect_pkey+0x87e/0xd40 [ 26.334193] __x64_sys_mprotect+0x78/0xc0 [ 26.334714] do_syscall_64+0x3f/0x90 [ 26.335192] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.335853] [ 26.336068] Freed by task 212: [ 26.336470] kasan_save_stack+0x22/0x50 [ 26.336975] kasan_set_track+0x25/0x30 [ 26.337471] kasan_save_free_info+0x2b/0x50 [ 26.338006] __kasan_slab_free+0x10a/0x190 [ 26.338549] kmem_cache_free+0x10d/0x4d0 [ 26.339064] rcu_core+0x8c8/0x2860 [ 26.339533] __do_softirq+0x1b7/0x7d4 [ 26.340018] [ 26.340233] Last potentially related work creation: [ 26.340823] kasan_save_stack+0x22/0x50 [ 26.341332] __kasan_record_aux_stack+0x8e/0xa0 [ 26.341919] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.342590] remove_vma+0x139/0x170 [ 26.343097] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.343679] do_vmi_munmap+0x1f1/0x2b0 [ 26.344164] __vm_munmap+0x138/0x3a0 [ 26.344641] __x64_sys_munmap+0x59/0x80 [ 26.345163] do_syscall_64+0x3f/0x90 [ 26.345644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.346304] [ 26.346528] The buggy address belongs to the object at ffff8880102980e8 [ 26.346528] which belongs to the cache vm_area_struct of size 168 [ 26.348006] The buggy address is located 88 bytes inside of [ 26.348006] freed 168-byte region [ffff8880102980e8, ffff888010298190) [ 26.349404] [ 26.349624] The buggy address belongs to the physical page: [ 26.350280] page:0000000080c50d6a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10298 [ 26.351380] memcg:ffff88800d2e7d01 [ 26.351831] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.352487] page_type: 0xffffffff() [ 26.352933] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 26.353853] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2e7d01 [ 26.354755] page dumped because: kasan: bad access detected [ 26.355423] [ 26.355643] Memory state around the buggy address: [ 26.356225] ffff888010298000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.357085] ffff888010298080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 26.357937] >ffff888010298100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.358789] ^ [ 26.359441] ffff888010298180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 26.360292] ffff888010298200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 26.361146] ================================================================== [ 26.362263] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.388411] BUG: Bad rss-counter state mm:00000000529d3e68 type:MM_FILEPAGES val:33 [ 28.389107] BUG: Bad rss-counter state mm:00000000529d3e68 type:MM_ANONPAGES val:22 [ 28.872866] BUG: Bad rss-counter state mm:0000000077442ea7 type:MM_FILEPAGES val:33 [ 28.873991] BUG: Bad rss-counter state mm:0000000077442ea7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46383' (ECDSA) to the list of known hosts. 2023/06/19 22:10:44 fuzzer started 2023/06/19 22:10:45 dialing manager at localhost:44161 2023/06/19 22:10:45 checking machine... 2023/06/19 22:10:45 checking revisions... [ 29.537427] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:10:45 testing simple program... [ 29.576113] cgroup: Unknown subsys name 'net' [ 29.612735] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:10:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000010 RCX=00007ffc315791c0 RDX=0000000000000034 RSI=0000000000000000 RDI=00007ffc315791b0 RBP=00007ffc31579280 RSP=00007ffc31579190 R8 =0000000000000010 R9 =00007ffc31579420 R10=000000000000002b R11=0000000200000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000010 R15=00007ffc31579190 RIP=00007f8909118d35 RFL=00000283 [--S---C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f890858b900 00000000 00000000 GS =0000 0000000000000000 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=00007f890856a020 CR3=000000000a136000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=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=00007f73ee54f0c0 CR3=000000000cb8c000 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=cb110c8dc407f5a4014985e232490637 XMM02=000000000011c628eff9b2d0a8fce9cb XMM03=000000000011c6f82c67c8bc2e329bc3 XMM04=9f16843a315382fa00000000000ae988 XMM05=19e9129bd510f23500000000001329b0 XMM06=1c2686817950bd3e0000000000131420 XMM07=e042d86d42eb936e0000000000123360 XMM08=52679e354a94a71d000000000011c6f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000