[ 30.231290] BUG: Bad rss-counter state mm:0000000073c2d84a type:MM_FILEPAGES val:33 [ 30.232098] BUG: Bad rss-counter state mm:0000000073c2d84a type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.397200] ================================================================== [ 30.397801] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.398405] Read of size 8 at addr ffff88800d72d228 by task sshd/222 [ 30.398901] [ 30.399045] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.399594] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.400260] Call Trace: [ 30.400468] [ 30.400658] dump_stack_lvl+0x91/0xf0 [ 30.400986] print_report+0xcc/0x620 [ 30.401303] ? __virt_addr_valid+0x102/0x340 [ 30.401665] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.402062] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.402462] kasan_report+0xbe/0xf0 [ 30.402799] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.403198] vma_interval_tree_remove+0xc75/0xec0 [ 30.403599] vma_prepare+0xc54/0x11a0 [ 30.403947] __split_vma+0x5af/0x950 [ 30.404280] ? __pfx___split_vma+0x10/0x10 [ 30.404861] ? find_held_lock+0x2c/0x110 [ 30.405196] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.405565] ? lock_is_held_type+0x9f/0x120 [ 30.405960] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.406349] ? mtree_range_walk+0x632/0x900 [ 30.406739] ? mas_walk+0x5c7/0x7c0 [ 30.407043] do_vmi_munmap+0x1f1/0x2b0 [ 30.407366] mmap_region+0x1f9/0x2660 [ 30.407712] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.412095] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.412553] ? __pfx_lock_acquire+0x10/0x10 [ 30.412904] ? __pfx_mmap_region+0x10/0x10 [ 30.413252] ? security_mmap_addr+0x7d/0xa0 [ 30.413603] ? get_unmapped_area+0x1f5/0x3f0 [ 30.413959] do_mmap+0x854/0xf00 [ 30.414248] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.414577] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.414988] ksys_mmap_pgoff+0x3af/0x500 [ 30.415322] do_syscall_64+0x3f/0x90 [ 30.415640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.416083] RIP: 0033:0x7f19e6a8dd82 [ 30.416390] 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 [ 30.417803] RSP: 002b:00007ffc80c373a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.418389] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f19e6a8dd82 [ 30.418961] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f19e5ec7000 [ 30.419498] RBP: 00007f19e5ec7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.420135] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c785c44b20 [ 30.420726] R13: 00007ffc80c373c0 R14: 00007ffc80c373f0 R15: 00007ffc80c37750 [ 30.421273] [ 30.421467] [ 30.421600] Allocated by task 213: [ 30.421885] kasan_save_stack+0x22/0x50 [ 30.422212] kasan_set_track+0x25/0x30 [ 30.422529] __kasan_slab_alloc+0x59/0x70 [ 30.422891] kmem_cache_alloc+0x16b/0x370 [ 30.423224] vm_area_dup+0x20/0x160 [ 30.423515] __split_vma+0x170/0x950 [ 30.423860] split_vma+0xc6/0x110 [ 30.424178] mprotect_fixup+0x8d2/0xb30 [ 30.424503] do_mprotect_pkey+0x87e/0xd40 [ 30.424845] __x64_sys_mprotect+0x78/0xc0 [ 30.425180] do_syscall_64+0x3f/0x90 [ 30.425489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.425936] [ 30.426077] Freed by task 204: [ 30.426330] kasan_save_stack+0x22/0x50 [ 30.426676] kasan_set_track+0x25/0x30 [ 30.427028] kasan_save_free_info+0x2b/0x50 [ 30.427371] __kasan_slab_free+0x10a/0x190 [ 30.427747] kmem_cache_free+0x10d/0x4d0 [ 30.428089] rcu_core+0x8c8/0x2860 [ 30.428397] __do_softirq+0x1b7/0x7d4 [ 30.428739] [ 30.428902] Last potentially related work creation: [ 30.429283] kasan_save_stack+0x22/0x50 [ 30.429640] __kasan_record_aux_stack+0x8e/0xa0 [ 30.430030] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.430448] remove_vma+0x139/0x170 [ 30.430780] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.431156] do_vmi_munmap+0x1f1/0x2b0 [ 30.431474] __vm_munmap+0x138/0x3a0 [ 30.431777] __x64_sys_munmap+0x59/0x80 [ 30.432141] do_syscall_64+0x3f/0x90 [ 30.432455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.432911] [ 30.433052] The buggy address belongs to the object at ffff88800d72d1d0 [ 30.433052] which belongs to the cache vm_area_struct of size 168 [ 30.434035] The buggy address is located 88 bytes inside of [ 30.434035] freed 168-byte region [ffff88800d72d1d0, ffff88800d72d278) [ 30.434965] [ 30.435105] The buggy address belongs to the physical page: [ 30.435525] page:00000000ac826753 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd72d [ 30.436303] memcg:ffff88800f44e401 [ 30.436610] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.437038] page_type: 0xffffffff() [ 30.437329] raw: 0100000000000200 ffff8880087a0c80 ffffea0000366b40 dead000000000002 [ 30.437923] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f44e401 [ 30.438504] page dumped because: kasan: bad access detected [ 30.438927] [ 30.439069] Memory state around the buggy address: [ 30.439441] ffff88800d72d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.439991] ffff88800d72d180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.440602] >ffff88800d72d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.441174] ^ [ 30.441530] ffff88800d72d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.442073] ffff88800d72d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.442619] ================================================================== [ 30.443482] Disabling lock debugging due to kernel taint [ 38.453659] BUG: Bad rss-counter state mm:0000000015f02391 type:MM_FILEPAGES val:33 [ 38.455429] BUG: Bad rss-counter state mm:0000000015f02391 type:MM_ANONPAGES val:22 [ 39.431263] BUG: Bad rss-counter state mm:000000006ba6e086 type:MM_FILEPAGES val:33 [ 39.431922] BUG: Bad rss-counter state mm:000000006ba6e086 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11427' (ECDSA) to the list of known hosts. 2023/06/21 10:24:24 fuzzer started 2023/06/21 10:24:25 dialing manager at localhost:36067 2023/06/21 10:24:25 checking machine... 2023/06/21 10:24:25 checking revisions... 2023/06/21 10:24:25 testing simple program... [ 40.470845] kmemleak: Automatic memory scanning thread ended [ 40.515374] cgroup: Unknown subsys name 'net' [ 40.576138] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:24:25 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=0000563c9383e468 CR3=0000000009b3a000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 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=00007ffc0d0d4ef9 CR3=0000000009b3a000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000