[ 24.008085] BUG: Bad rss-counter state mm:00000000fd1df3eb type:MM_FILEPAGES val:33 [ 24.008894] BUG: Bad rss-counter state mm:00000000fd1df3eb type:MM_ANONPAGES val:22 [ 24.137964] ================================================================== [ 24.138850] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.139785] Read of size 8 at addr ffff88800d89da50 by task sshd/218 [ 24.140544] [ 24.140764] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.141714] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.142678] Call Trace: [ 24.142994] [ 24.143279] dump_stack_lvl+0x91/0xf0 [ 24.143762] print_report+0xcc/0x620 [ 24.144243] ? __virt_addr_valid+0x102/0x340 [ 24.144789] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.145399] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.146019] kasan_report+0xbe/0xf0 [ 24.146489] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.147105] vma_interval_tree_remove+0xc75/0xec0 [ 24.147705] vma_prepare+0xc54/0x11a0 [ 24.148177] __split_vma+0x5af/0x950 [ 24.148657] ? __pfx___split_vma+0x10/0x10 [ 24.149188] ? find_held_lock+0x2c/0x110 [ 24.149739] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.150297] ? lock_is_held_type+0x9f/0x120 [ 24.150833] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.151439] ? mtree_range_walk+0x632/0x900 [ 24.151989] ? mas_walk+0x5c7/0x7c0 [ 24.152459] do_vmi_munmap+0x1f1/0x2b0 [ 24.152947] mmap_region+0x1f9/0x2660 [ 24.153432] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.153958] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.154676] ? __pfx_lock_acquire+0x10/0x10 [ 24.155207] ? __pfx_mmap_region+0x10/0x10 [ 24.155740] ? security_mmap_addr+0x7d/0xa0 [ 24.156270] ? get_unmapped_area+0x1f5/0x3f0 [ 24.156813] do_mmap+0x854/0xf00 [ 24.157248] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.157745] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.158302] ksys_mmap_pgoff+0x3af/0x500 [ 24.158811] do_syscall_64+0x3f/0x90 [ 24.159284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.159926] RIP: 0033:0x7f6f6c2a5d82 [ 24.160384] 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 [ 24.162519] RSP: 002b:00007ffded92a3a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.163416] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6f6c2a5d82 [ 24.164266] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6f6b6df000 [ 24.165105] RBP: 00007f6f6b6df000 R08: 0000000000000009 R09: 0000000000001000 [ 24.165948] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d5cc7bf70 [ 24.166783] R13: 00007ffded92a3c0 R14: 00007ffded92a3f0 R15: 00007ffded92a750 [ 24.167639] [ 24.167929] [ 24.168143] Allocated by task 208: [ 24.168569] kasan_save_stack+0x22/0x50 [ 24.169072] kasan_set_track+0x25/0x30 [ 24.169574] __kasan_slab_alloc+0x59/0x70 [ 24.170094] kmem_cache_alloc+0x16b/0x370 [ 24.170610] vm_area_dup+0x20/0x160 [ 24.171061] __split_vma+0x170/0x950 [ 24.171521] split_vma+0xc6/0x110 [ 24.171953] mprotect_fixup+0x8d2/0xb30 [ 24.172455] do_mprotect_pkey+0x87e/0xd40 [ 24.172983] __x64_sys_mprotect+0x78/0xc0 [ 24.173509] do_syscall_64+0x3f/0x90 [ 24.173984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.174616] [ 24.174829] Freed by task 19: [ 24.175208] kasan_save_stack+0x22/0x50 [ 24.175705] kasan_set_track+0x25/0x30 [ 24.176197] kasan_save_free_info+0x2b/0x50 [ 24.176731] __kasan_slab_free+0x10a/0x190 [ 24.177262] kmem_cache_free+0x10d/0x4d0 [ 24.177775] rcu_core+0x8c8/0x2860 [ 24.178219] __do_softirq+0x1b7/0x7d4 [ 24.178695] [ 24.178913] Last potentially related work creation: [ 24.179489] kasan_save_stack+0x22/0x50 [ 24.179997] __kasan_record_aux_stack+0x8e/0xa0 [ 24.180566] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.181202] remove_vma+0x139/0x170 [ 24.181666] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.182220] do_vmi_munmap+0x1f1/0x2b0 [ 24.182702] __vm_munmap+0x138/0x3a0 [ 24.183164] __x64_sys_munmap+0x59/0x80 [ 24.183655] do_syscall_64+0x3f/0x90 [ 24.184125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.184757] [ 24.184971] The buggy address belongs to the object at ffff88800d89d9f8 [ 24.184971] which belongs to the cache vm_area_struct of size 168 [ 24.186446] The buggy address is located 88 bytes inside of [ 24.186446] freed 168-byte region [ffff88800d89d9f8, ffff88800d89daa0) [ 24.187848] [ 24.188069] The buggy address belongs to the physical page: [ 24.188720] page:000000000592f06c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd89d [ 24.189803] memcg:ffff88800edf3901 [ 24.190228] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.190914] page_type: 0xffffffff() [ 24.191365] raw: 0100000000000200 ffff88800879fc80 ffffea00003ac600 dead000000000007 [ 24.192287] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edf3901 [ 24.193194] page dumped because: kasan: bad access detected [ 24.193877] [ 24.194090] Memory state around the buggy address: [ 24.194665] ffff88800d89d900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.195515] ffff88800d89d980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.196362] >ffff88800d89da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.197202] ^ [ 24.197922] ffff88800d89da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.198771] ffff88800d89db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.199619] ================================================================== [ 24.200625] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.020370] BUG: Bad rss-counter state mm:000000004946639a type:MM_FILEPAGES val:33 [ 26.021650] BUG: Bad rss-counter state mm:000000004946639a type:MM_ANONPAGES val:22 [ 26.482308] BUG: Bad rss-counter state mm:00000000d163441d type:MM_FILEPAGES val:33 [ 26.483309] BUG: Bad rss-counter state mm:00000000d163441d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50679' (ECDSA) to the list of known hosts. 2023/06/19 23:51:29 fuzzer started 2023/06/19 23:51:30 dialing manager at localhost:44161 2023/06/19 23:51:30 checking machine... 2023/06/19 23:51:30 checking revisions... [ 27.269114] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:51:30 testing simple program... [ 27.310720] cgroup: Unknown subsys name 'net' [ 27.353447] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:51:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09d38 RCX=0000000000000100 RDX=dffffc0000000000 RSI=ffffffff81660364 RDI=ffffea0000688eb8 RBP=ffffea0000688e80 RSP=ffff88806ce09d38 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000001 R13=ffffed10033d6e02 R14=dffffc0000000000 R15=ffff888019eb7010 RIP=ffffffff8183cbeb RFL=00000282 [--S----] 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=00007f7130094f70 CR3=000000000def0000 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=2039323a31353a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a31353a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff84d2fa00 RCX=0000000000000000 RDX=ffff88801771b680 RSI=ffffffff8186c0f3 RDI=0000000000000000 RBP=ffff88800ebc2a00 RSP=ffff88800fd4fde0 R8 =0000000000000003 R9 =0000000000002000 R10=000000000000c000 R11=00000000000b6996 R12=ffff88800ebc2b98 R13=ffff88800ebc2a50 R14=ffff8880163e45c0 R15=ffff88800ebc2b80 RIP=ffffffff8186c0f3 RFL=00000293 [--S-A-C] 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 00007f2c5376e900 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=00007ffe5f672000 CR3=000000000ea58000 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=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