[ 23.662023] BUG: Bad rss-counter state mm:00000000e3a3d1be type:MM_FILEPAGES val:33 [ 23.663047] BUG: Bad rss-counter state mm:00000000e3a3d1be type:MM_ANONPAGES val:22 [ 23.762899] ================================================================== [ 23.763989] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.765103] Read of size 8 at addr ffff88800e163140 by task sshd/219 [ 23.766037] [ 23.766303] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.767464] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.768633] Call Trace: [ 23.769016] [ 23.769367] dump_stack_lvl+0x91/0xf0 [ 23.769973] print_report+0xcc/0x620 [ 23.770547] ? __virt_addr_valid+0x102/0x340 [ 23.771200] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.771930] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.772654] kasan_report+0xbe/0xf0 [ 23.773268] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.774103] vma_interval_tree_remove+0xc75/0xec0 [ 23.774538] vma_prepare+0xc54/0x11a0 [ 23.774827] __split_vma+0x5af/0x950 [ 23.775110] ? __pfx___split_vma+0x10/0x10 [ 23.775429] ? find_held_lock+0x2c/0x110 [ 23.775751] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.776095] ? lock_is_held_type+0x9f/0x120 [ 23.776424] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.776787] ? mtree_range_walk+0x632/0x900 [ 23.777122] ? mas_walk+0x5c7/0x7c0 [ 23.777416] do_vmi_munmap+0x1f1/0x2b0 [ 23.777730] mmap_region+0x1f9/0x2660 [ 23.778033] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.778346] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.778779] ? __pfx_lock_acquire+0x10/0x10 [ 23.779101] ? __pfx_mmap_region+0x10/0x10 [ 23.779444] ? security_mmap_addr+0x7d/0xa0 [ 23.779851] ? get_unmapped_area+0x1f5/0x3f0 [ 23.780191] do_mmap+0x854/0xf00 [ 23.780606] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.780907] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.781257] ksys_mmap_pgoff+0x3af/0x500 [ 23.781578] do_syscall_64+0x3f/0x90 [ 23.781867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.782260] RIP: 0033:0x7fe270cbbd82 [ 23.782537] 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 [ 23.783834] RSP: 002b:00007ffc052f43c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.784378] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe270cbbd82 [ 23.784893] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe2700f5000 [ 23.785435] RBP: 00007fe2700f5000 R08: 0000000000000009 R09: 0000000000001000 [ 23.785964] R10: 0000000000000812 R11: 0000000000000206 R12: 000056231cc98ec0 [ 23.786478] R13: 00007ffc052f43e0 R14: 00007ffc052f4410 R15: 00007ffc052f4770 [ 23.787005] [ 23.787186] [ 23.787324] Allocated by task 212: [ 23.787586] kasan_save_stack+0x22/0x50 [ 23.787898] kasan_set_track+0x25/0x30 [ 23.788195] __kasan_slab_alloc+0x59/0x70 [ 23.788512] kmem_cache_alloc+0x16b/0x370 [ 23.788825] vm_area_dup+0x20/0x160 [ 23.789100] __split_vma+0x170/0x950 [ 23.789391] split_vma+0xc6/0x110 [ 23.789656] mprotect_fixup+0x8d2/0xb30 [ 23.789964] do_mprotect_pkey+0x87e/0xd40 [ 23.790289] __x64_sys_mprotect+0x78/0xc0 [ 23.790608] do_syscall_64+0x3f/0x90 [ 23.790898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.791293] [ 23.791426] Freed by task 203: [ 23.791665] kasan_save_stack+0x22/0x50 [ 23.791972] kasan_set_track+0x25/0x30 [ 23.792275] kasan_save_free_info+0x2b/0x50 [ 23.792598] __kasan_slab_free+0x10a/0x190 [ 23.792916] kmem_cache_free+0x10d/0x4d0 [ 23.793226] rcu_core+0x8c8/0x2860 [ 23.793512] __do_softirq+0x1b7/0x7d4 [ 23.793812] [ 23.793941] Last potentially related work creation: [ 23.794301] kasan_save_stack+0x22/0x50 [ 23.794611] __kasan_record_aux_stack+0x8e/0xa0 [ 23.794964] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.795350] remove_vma+0x139/0x170 [ 23.795626] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.795965] do_vmi_munmap+0x1f1/0x2b0 [ 23.796262] __vm_munmap+0x138/0x3a0 [ 23.796546] __x64_sys_munmap+0x59/0x80 [ 23.796849] do_syscall_64+0x3f/0x90 [ 23.797138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.797534] [ 23.797667] The buggy address belongs to the object at ffff88800e1630e8 [ 23.797667] which belongs to the cache vm_area_struct of size 168 [ 23.798563] The buggy address is located 88 bytes inside of [ 23.798563] freed 168-byte region [ffff88800e1630e8, ffff88800e163190) [ 23.799418] [ 23.799549] The buggy address belongs to the physical page: [ 23.799950] page:00000000dff45b2e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe163 [ 23.800616] memcg:ffff88800e0d9501 [ 23.800873] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.801309] page_type: 0xffffffff() [ 23.801585] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 23.802143] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0d9501 [ 23.802685] page dumped because: kasan: bad access detected [ 23.803084] [ 23.803212] Memory state around the buggy address: [ 23.803568] ffff88800e163000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.804075] ffff88800e163080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 23.804597] >ffff88800e163100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.805111] ^ [ 23.805511] ffff88800e163180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 23.806030] ffff88800e163200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 23.806542] ================================================================== [ 23.807166] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.283668] BUG: Bad rss-counter state mm:000000003e7e7f82 type:MM_FILEPAGES val:33 [ 26.284695] BUG: Bad rss-counter state mm:000000003e7e7f82 type:MM_ANONPAGES val:22 [ 26.802871] BUG: Bad rss-counter state mm:000000001d072cc9 type:MM_FILEPAGES val:33 [ 26.804068] BUG: Bad rss-counter state mm:000000001d072cc9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32716' (ECDSA) to the list of known hosts. 2023/06/21 10:36:32 fuzzer started 2023/06/21 10:36:32 dialing manager at localhost:36067 2023/06/21 10:36:32 checking machine... 2023/06/21 10:36:32 checking revisions... [ 27.516170] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:36:32 testing simple program... [ 27.564009] cgroup: Unknown subsys name 'net' [ 27.673022] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:36:32 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=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=00007f2f2a1a1bb0 CR3=000000000f088000 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=6fe0d98453dc03a126420c76e40a2a34 XMM02=ec2efd57dc4c00df000000000011a238 XMM03=5fa4fcbc2f724351000000000011a308 XMM04=35e20fe7a606a12a00000000000ae988 XMM05=09ea58cecda768840000000000132128 XMM06=806171799158d9670000000000130b88 XMM07=e042d86d42eb936e0000000000121348 XMM08=5fa4fcbc2f724351000000000011a308 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff1100d9e139e RCX=ffffffff812d8f13 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88806cf09cd0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88806cf09ff8 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8562be48 R15=0000000000000000 RIP=ffffffff8135b935 RFL=00000047 [---Z-PC] 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 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=00007ffe582ff000 CR3=0000000016cea000 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=ffffff0000ff00000000000000000000 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