[ 80.278507] BUG: Bad rss-counter state mm:000000005548068d type:MM_FILEPAGES val:33 [ 80.279514] BUG: Bad rss-counter state mm:000000005548068d type:MM_ANONPAGES val:22 [ 80.413314] ================================================================== [ 80.414145] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 80.415026] Read of size 8 at addr ffff888019cf6880 by task sshd/226 [ 80.415874] [ 80.416083] CPU: 1 PID: 226 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 80.417038] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 80.417951] Call Trace: [ 80.418250] [ 80.418514] dump_stack_lvl+0x91/0xf0 [ 80.418956] print_report+0xcc/0x620 [ 80.419389] ? __virt_addr_valid+0x102/0x340 [ 80.419892] ? vma_interval_tree_remove+0xc75/0xec0 [ 80.420465] ? vma_interval_tree_remove+0xc75/0xec0 [ 80.421011] kasan_report+0xbe/0xf0 [ 80.421361] ? vma_interval_tree_remove+0xc75/0xec0 [ 80.421831] vma_interval_tree_remove+0xc75/0xec0 [ 80.422282] vma_prepare+0xc54/0x11a0 [ 80.422647] __split_vma+0x5af/0x950 [ 80.422991] ? __pfx___split_vma+0x10/0x10 [ 80.423307] ? find_held_lock+0x2c/0x110 [ 80.423618] do_vmi_align_munmap+0x2ba/0x11f0 [ 80.423953] ? lock_is_held_type+0x9f/0x120 [ 80.424278] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 80.424637] ? mtree_range_walk+0x632/0x900 [ 80.424966] ? mas_walk+0x5c7/0x7c0 [ 80.425250] do_vmi_munmap+0x1f1/0x2b0 [ 80.425543] mmap_region+0x1f9/0x2660 [ 80.425830] ? vm_mmap_pgoff+0x15c/0x3a0 [ 80.426135] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 80.426558] ? __pfx_lock_acquire+0x10/0x10 [ 80.426875] ? __pfx_mmap_region+0x10/0x10 [ 80.427189] ? security_mmap_addr+0x7d/0xa0 [ 80.427506] ? get_unmapped_area+0x1f5/0x3f0 [ 80.427830] do_mmap+0x854/0xf00 [ 80.428097] vm_mmap_pgoff+0x1a6/0x3a0 [ 80.428392] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 80.428725] ksys_mmap_pgoff+0x3af/0x500 [ 80.429023] do_syscall_64+0x3f/0x90 [ 80.429305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 80.429687] RIP: 0033:0x7fba5921dd82 [ 80.429960] 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 [ 80.431207] RSP: 002b:00007ffe5d96edc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 80.431747] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba5921dd82 [ 80.432252] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba58657000 [ 80.432750] RBP: 00007fba58657000 R08: 0000000000000009 R09: 0000000000001000 [ 80.433244] R10: 0000000000000812 R11: 0000000000000206 R12: 00005611036e1b20 [ 80.433736] R13: 00007ffe5d96ede0 R14: 00007ffe5d96ee10 R15: 00007ffe5d96f170 [ 80.434235] [ 80.434406] [ 80.434536] Allocated by task 216: [ 80.434789] kasan_save_stack+0x22/0x50 [ 80.435087] kasan_set_track+0x25/0x30 [ 80.435376] __kasan_slab_alloc+0x59/0x70 [ 80.435686] kmem_cache_alloc+0x16b/0x370 [ 80.435990] vm_area_dup+0x20/0x160 [ 80.436263] __split_vma+0x170/0x950 [ 80.436536] split_vma+0xc6/0x110 [ 80.436796] mprotect_fixup+0x8d2/0xb30 [ 80.437093] do_mprotect_pkey+0x87e/0xd40 [ 80.437399] __x64_sys_mprotect+0x78/0xc0 [ 80.437709] do_syscall_64+0x3f/0x90 [ 80.437989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 80.438366] [ 80.438493] Freed by task 216: [ 80.438728] kasan_save_stack+0x22/0x50 [ 80.439026] kasan_set_track+0x25/0x30 [ 80.439315] kasan_save_free_info+0x2b/0x50 [ 80.439632] __kasan_slab_free+0x10a/0x190 [ 80.439947] kmem_cache_free+0x10d/0x4d0 [ 80.440260] rcu_core+0x8c8/0x2860 [ 80.440523] __do_softirq+0x1b7/0x7d4 [ 80.440809] [ 80.440936] Last potentially related work creation: [ 80.441281] kasan_save_stack+0x22/0x50 [ 80.441579] __kasan_record_aux_stack+0x8e/0xa0 [ 80.441915] __call_rcu_common.constprop.0+0x6a/0xb90 [ 80.442294] remove_vma+0x139/0x170 [ 80.442560] do_vmi_align_munmap+0xd4a/0x11f0 [ 80.442890] do_vmi_munmap+0x1f1/0x2b0 [ 80.443176] __vm_munmap+0x138/0x3a0 [ 80.443451] __x64_sys_munmap+0x59/0x80 [ 80.443744] do_syscall_64+0x3f/0x90 [ 80.444023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 80.444406] [ 80.444536] The buggy address belongs to the object at ffff888019cf6828 [ 80.444536] which belongs to the cache vm_area_struct of size 168 [ 80.445393] The buggy address is located 88 bytes inside of [ 80.445393] freed 168-byte region [ffff888019cf6828, ffff888019cf68d0) [ 80.446212] [ 80.446339] The buggy address belongs to the physical page: [ 80.446722] page:00000000ba6b527a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cf6 [ 80.447361] memcg:ffff8880169f7501 [ 80.447612] flags: 0x100000000000200(slab|node=0|zone=1) [ 80.447993] page_type: 0xffffffff() [ 80.448270] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 80.448806] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169f7501 [ 80.449335] page dumped because: kasan: bad access detected [ 80.449724] [ 80.449851] Memory state around the buggy address: [ 80.450192] ffff888019cf6780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 80.450693] ffff888019cf6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 80.451196] >ffff888019cf6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 80.451692] ^ [ 80.451933] ffff888019cf6900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 80.452434] ffff888019cf6980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 80.452928] ================================================================== [ 80.453455] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 82.354934] BUG: Bad rss-counter state mm:000000005690087f type:MM_FILEPAGES val:33 [ 82.357121] BUG: Bad rss-counter state mm:000000005690087f type:MM_ANONPAGES val:22 [ 82.868793] BUG: Bad rss-counter state mm:00000000f8d4cb18 type:MM_FILEPAGES val:33 [ 82.869883] BUG: Bad rss-counter state mm:00000000f8d4cb18 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7152' (ECDSA) to the list of known hosts. 2023/06/19 15:48:41 fuzzer started 2023/06/19 15:48:41 dialing manager at localhost:44161 2023/06/19 15:48:41 checking machine... 2023/06/19 15:48:41 checking revisions... [ 83.564024] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:48:41 testing simple program... [ 83.607954] cgroup: Unknown subsys name 'net' [ 83.651868] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:47:51 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=ffff888008c58000 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=00007fd7f3dd3690 CR3=000000000ee54000 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=2030343a38343a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a38343a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff8460144a RCX=0000000000000001 RDX=1ffff1100d9e1359 RSI=ffff88801452fc20 RDI=ffffffff8460144a RBP=ffffffff8460144a RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b523e R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888017f21b40 R15=ffff8880096c6680 RIP=ffffffff811fc6f0 RFL=00000286 [--S--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 00007ff66a6bd900 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=00007fffe57ad000 CR3=000000000c624000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000