[ 31.939557] BUG: Bad rss-counter state mm:00000000616cf12f type:MM_FILEPAGES val:33 [ 31.940566] BUG: Bad rss-counter state mm:00000000616cf12f type:MM_ANONPAGES val:22 [ 32.105729] ================================================================== [ 32.106819] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.107972] Read of size 8 at addr ffff88800ee873f8 by task sshd/220 [ 32.109029] [ 32.109290] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.110314] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.111464] Call Trace: [ 32.111789] [ 32.112071] dump_stack_lvl+0x91/0xf0 [ 32.112560] print_report+0xcc/0x620 [ 32.113060] ? __virt_addr_valid+0x102/0x340 [ 32.113644] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.114282] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.114896] kasan_report+0xbe/0xf0 [ 32.115379] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.116003] vma_interval_tree_remove+0xc75/0xec0 [ 32.116606] vma_prepare+0xc54/0x11a0 [ 32.117088] __split_vma+0x5af/0x950 [ 32.117563] ? __pfx___split_vma+0x10/0x10 [ 32.118092] ? find_held_lock+0x2c/0x110 [ 32.118613] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.119212] ? lock_is_held_type+0x9f/0x120 [ 32.119747] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.120354] ? mtree_range_walk+0x632/0x900 [ 32.120911] ? mas_walk+0x5c7/0x7c0 [ 32.121391] do_vmi_munmap+0x1f1/0x2b0 [ 32.121899] mmap_region+0x1f9/0x2660 [ 32.122389] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.122903] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.123626] ? __pfx_lock_acquire+0x10/0x10 [ 32.124162] ? __pfx_mmap_region+0x10/0x10 [ 32.124694] ? security_mmap_addr+0x7d/0xa0 [ 32.125223] ? get_unmapped_area+0x1f5/0x3f0 [ 32.125778] do_mmap+0x854/0xf00 [ 32.126220] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.126721] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.127311] ksys_mmap_pgoff+0x3af/0x500 [ 32.127825] do_syscall_64+0x3f/0x90 [ 32.128311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.128966] RIP: 0033:0x7ffad13e8d82 [ 32.129426] 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 [ 32.131566] RSP: 002b:00007ffcd79b9c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.132470] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffad13e8d82 [ 32.133322] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffad0822000 [ 32.134170] RBP: 00007ffad0822000 R08: 0000000000000009 R09: 0000000000001000 [ 32.135016] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e230fdd90 [ 32.135886] R13: 00007ffcd79b9c70 R14: 00007ffcd79b9ca0 R15: 00007ffcd79ba000 [ 32.136744] [ 32.137037] [ 32.137257] Allocated by task 212: [ 32.137694] kasan_save_stack+0x22/0x50 [ 32.138198] kasan_set_track+0x25/0x30 [ 32.138697] __kasan_slab_alloc+0x59/0x70 [ 32.139231] kmem_cache_alloc+0x16b/0x370 [ 32.139747] vm_area_dup+0x20/0x160 [ 32.140203] __split_vma+0x170/0x950 [ 32.140674] split_vma+0xc6/0x110 [ 32.141113] mprotect_fixup+0x8d2/0xb30 [ 32.141616] do_mprotect_pkey+0x87e/0xd40 [ 32.142142] __x64_sys_mprotect+0x78/0xc0 [ 32.142668] do_syscall_64+0x3f/0x90 [ 32.143156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.143803] [ 32.144020] Freed by task 212: [ 32.144413] kasan_save_stack+0x22/0x50 [ 32.144921] kasan_set_track+0x25/0x30 [ 32.145416] kasan_save_free_info+0x2b/0x50 [ 32.145953] __kasan_slab_free+0x10a/0x190 [ 32.146489] kmem_cache_free+0x10d/0x4d0 [ 32.146998] rcu_core+0x8c8/0x2860 [ 32.147467] __do_softirq+0x1b7/0x7d4 [ 32.147945] [ 32.148160] Last potentially related work creation: [ 32.148748] kasan_save_stack+0x22/0x50 [ 32.149259] __kasan_record_aux_stack+0x8e/0xa0 [ 32.149891] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.150535] remove_vma+0x139/0x170 [ 32.150986] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.151558] do_vmi_munmap+0x1f1/0x2b0 [ 32.152045] __vm_munmap+0x138/0x3a0 [ 32.152515] __x64_sys_munmap+0x59/0x80 [ 32.153019] do_syscall_64+0x3f/0x90 [ 32.153502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.154147] [ 32.154368] The buggy address belongs to the object at ffff88800ee873a0 [ 32.154368] which belongs to the cache vm_area_struct of size 168 [ 32.155853] The buggy address is located 88 bytes inside of [ 32.155853] freed 168-byte region [ffff88800ee873a0, ffff88800ee87448) [ 32.157250] [ 32.157468] The buggy address belongs to the physical page: [ 32.158122] page:000000001411b7ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee87 [ 32.159213] memcg:ffff88800e5c5c01 [ 32.159634] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.160273] page_type: 0xffffffff() [ 32.160721] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 32.161638] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5c5c01 [ 32.162542] page dumped because: kasan: bad access detected [ 32.163210] [ 32.163427] Memory state around the buggy address: [ 32.164010] ffff88800ee87280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.164867] ffff88800ee87300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.165717] >ffff88800ee87380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.166559] ^ [ 32.167406] ffff88800ee87400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.168251] ffff88800ee87480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.169097] ================================================================== [ 32.170020] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.497580] BUG: Bad rss-counter state mm:00000000a7096dfe type:MM_FILEPAGES val:33 [ 34.498570] BUG: Bad rss-counter state mm:00000000a7096dfe type:MM_ANONPAGES val:22 [ 34.971594] BUG: Bad rss-counter state mm:00000000c693744e type:MM_FILEPAGES val:33 [ 34.972747] BUG: Bad rss-counter state mm:00000000c693744e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50296' (ECDSA) to the list of known hosts. 2023/06/20 18:15:16 fuzzer started 2023/06/20 18:15:17 dialing manager at localhost:36067 2023/06/20 18:15:17 checking machine... 2023/06/20 18:15:17 checking revisions... [ 35.591011] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:15:17 testing simple program... [ 35.630257] cgroup: Unknown subsys name 'net' [ 35.675959] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:15:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019aa8bc0 RCX=0000000000000000 RDX=0000000000000002 RSI=0000000000000000 RDI=ffff888019aa8bf8 RBP=ffffffff84d2dfe0 RSP=ffff88800fbb7d80 R8 =0000000000000002 R9 =0000000000000000 R10=ffff88800fbb7db0 R11=00000000000b6a61 R12=ffffffff87f95520 R13=0000000000000000 R14=1ffff11001f76fd1 R15=0000000000000000 RIP=ffffffff812a3003 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 00007f7d2d9b0900 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=00007f7d2df67618 CR3=000000000da78000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=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=00007ffc0ac11f98 CR3=0000000016d08000 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=2036313a35313a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a35313a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000