[ 30.745765] BUG: Bad rss-counter state mm:0000000090642fcd type:MM_FILEPAGES val:33 [ 30.747782] BUG: Bad rss-counter state mm:0000000090642fcd type:MM_ANONPAGES val:22 [ 30.924472] ================================================================== [ 30.925532] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.926660] Read of size 8 at addr ffff88800e1f3d08 by task sshd/219 [ 30.927536] [ 30.927755] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.928624] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.929600] Call Trace: [ 30.929916] [ 30.930195] dump_stack_lvl+0x91/0xf0 [ 30.930704] print_report+0xcc/0x620 [ 30.931188] ? __virt_addr_valid+0x102/0x340 [ 30.931735] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.932352] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.932966] kasan_report+0xbe/0xf0 [ 30.933439] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.934065] vma_interval_tree_remove+0xc75/0xec0 [ 30.934679] vma_prepare+0xc54/0x11a0 [ 30.935155] __split_vma+0x5af/0x950 [ 30.935628] ? __pfx___split_vma+0x10/0x10 [ 30.936161] ? find_held_lock+0x2c/0x110 [ 30.936677] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.937241] ? lock_is_held_type+0x9f/0x120 [ 30.937791] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.938401] ? mtree_range_walk+0x632/0x900 [ 30.938995] ? mas_walk+0x5c7/0x7c0 [ 30.939483] do_vmi_munmap+0x1f1/0x2b0 [ 30.939971] mmap_region+0x1f9/0x2660 [ 30.940464] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.940992] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.941720] ? __pfx_lock_acquire+0x10/0x10 [ 30.942265] ? __pfx_mmap_region+0x10/0x10 [ 30.942816] ? security_mmap_addr+0x7d/0xa0 [ 30.943353] ? get_unmapped_area+0x1f5/0x3f0 [ 30.943918] do_mmap+0x854/0xf00 [ 30.944369] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.944867] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.945431] ksys_mmap_pgoff+0x3af/0x500 [ 30.945948] do_syscall_64+0x3f/0x90 [ 30.946432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.947094] RIP: 0033:0x7ff900361d82 [ 30.947549] 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 [ 30.949703] RSP: 002b:00007ffccf2d2878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.950642] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff900361d82 [ 30.951493] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8ff79b000 [ 30.952336] RBP: 00007ff8ff79b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.953180] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556814563980 [ 30.954028] R13: 00007ffccf2d2890 R14: 00007ffccf2d28c0 R15: 00007ffccf2d2c20 [ 30.954893] [ 30.955190] [ 30.955404] Allocated by task 212: [ 30.955832] kasan_save_stack+0x22/0x50 [ 30.956334] kasan_set_track+0x25/0x30 [ 30.956828] __kasan_slab_alloc+0x59/0x70 [ 30.957352] kmem_cache_alloc+0x16b/0x370 [ 30.957866] vm_area_dup+0x20/0x160 [ 30.958323] __split_vma+0x170/0x950 [ 30.958799] split_vma+0xc6/0x110 [ 30.959247] mprotect_fixup+0x8d2/0xb30 [ 30.959759] do_mprotect_pkey+0x87e/0xd40 [ 30.960280] __x64_sys_mprotect+0x78/0xc0 [ 30.960804] do_syscall_64+0x3f/0x90 [ 30.961281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.961932] [ 30.962146] Freed by task 212: [ 30.962541] kasan_save_stack+0x22/0x50 [ 30.963070] kasan_set_track+0x25/0x30 [ 30.963563] kasan_save_free_info+0x2b/0x50 [ 30.964105] __kasan_slab_free+0x10a/0x190 [ 30.964642] kmem_cache_free+0x10d/0x4d0 [ 30.965146] rcu_core+0x8c8/0x2860 [ 30.965594] __do_softirq+0x1b7/0x7d4 [ 30.966076] [ 30.966294] Last potentially related work creation: [ 30.966892] kasan_save_stack+0x22/0x50 [ 30.967404] __kasan_record_aux_stack+0x8e/0xa0 [ 30.968024] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.968674] remove_vma+0x139/0x170 [ 30.969127] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.969689] do_vmi_munmap+0x1f1/0x2b0 [ 30.970172] __vm_munmap+0x138/0x3a0 [ 30.970661] __x64_sys_munmap+0x59/0x80 [ 30.971160] do_syscall_64+0x3f/0x90 [ 30.971644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.972289] [ 30.972502] The buggy address belongs to the object at ffff88800e1f3cb0 [ 30.972502] which belongs to the cache vm_area_struct of size 168 [ 30.973969] The buggy address is located 88 bytes inside of [ 30.973969] freed 168-byte region [ffff88800e1f3cb0, ffff88800e1f3d58) [ 30.975379] [ 30.975597] The buggy address belongs to the physical page: [ 30.976262] page:00000000efd6806e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1f3 [ 30.977349] memcg:ffff88800de1e101 [ 30.977771] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.978476] page_type: 0xffffffff() [ 30.978936] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.979860] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de1e101 [ 30.980766] page dumped because: kasan: bad access detected [ 30.981427] [ 30.981645] Memory state around the buggy address: [ 30.982224] ffff88800e1f3c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.983118] ffff88800e1f3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.983980] >ffff88800e1f3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.984829] ^ [ 30.985263] ffff88800e1f3d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.986113] ffff88800e1f3e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.986969] ================================================================== [ 30.987902] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.214076] BUG: Bad rss-counter state mm:00000000d0ca99c3 type:MM_FILEPAGES val:33 [ 33.215474] BUG: Bad rss-counter state mm:00000000d0ca99c3 type:MM_ANONPAGES val:22 [ 33.599521] BUG: Bad rss-counter state mm:00000000949c2852 type:MM_FILEPAGES val:33 [ 33.600463] BUG: Bad rss-counter state mm:00000000949c2852 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11431' (ECDSA) to the list of known hosts. 2023/06/20 20:26:49 fuzzer started 2023/06/20 20:26:49 dialing manager at localhost:36067 2023/06/20 20:26:49 checking machine... 2023/06/20 20:26:49 checking revisions... [ 34.351444] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:26:49 testing simple program... [ 34.397535] cgroup: Unknown subsys name 'net' [ 34.435036] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:26:48 Registers: info registers vcpu 0 RAX=00007f447b0d4060 RBX=00007ffc6fae55b0 RCX=00007ffc6fae5528 RDX=000000000000001b RSI=000000000000002c RDI=00007f447bbba060 RBP=00007ffc6fae56e0 RSP=fffffe0000002fd0 R8 =000055b1c29e0810 R9 =00007ffc6fae55e0 R10=000000000000002c R11=0000000000000246 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84601260 RFL=00000006 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f447b018900 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=00007f447b0d444c CR3=000000000de6a000 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=6720646572637465733a4d41503d706f 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ff69311a520 CR3=0000000009694000 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=2038343a36323a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a36323a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000