[ 30.790079] BUG: Bad rss-counter state mm:00000000d2bf3af3 type:MM_FILEPAGES val:33 [ 30.791300] BUG: Bad rss-counter state mm:00000000d2bf3af3 type:MM_ANONPAGES val:22 [ 30.936683] ================================================================== [ 30.937541] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.938422] Read of size 8 at addr ffff88800efc0a50 by task sshd/218 [ 30.939235] [ 30.939454] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.940270] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.941203] Call Trace: [ 30.941520] [ 30.941807] dump_stack_lvl+0x91/0xf0 [ 30.942299] print_report+0xcc/0x620 [ 30.942792] ? __virt_addr_valid+0x102/0x340 [ 30.943346] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.943962] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.944593] kasan_report+0xbe/0xf0 [ 30.945069] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.945691] vma_interval_tree_remove+0xc75/0xec0 [ 30.946282] vma_prepare+0xc54/0x11a0 [ 30.946762] __split_vma+0x5af/0x950 [ 30.947227] ? __pfx___split_vma+0x10/0x10 [ 30.947750] ? find_held_lock+0x2c/0x110 [ 30.948279] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.948857] ? lock_is_held_type+0x9f/0x120 [ 30.949403] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.950003] ? mtree_range_walk+0x632/0x900 [ 30.950544] ? mas_walk+0x5c7/0x7c0 [ 30.951024] do_vmi_munmap+0x1f1/0x2b0 [ 30.951512] mmap_region+0x1f9/0x2660 [ 30.952000] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.952542] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.953250] ? __pfx_lock_acquire+0x10/0x10 [ 30.953778] ? __pfx_mmap_region+0x10/0x10 [ 30.954307] ? security_mmap_addr+0x7d/0xa0 [ 30.954831] ? get_unmapped_area+0x1f5/0x3f0 [ 30.955384] do_mmap+0x854/0xf00 [ 30.955822] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.956330] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.956894] ksys_mmap_pgoff+0x3af/0x500 [ 30.957408] do_syscall_64+0x3f/0x90 [ 30.957877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.958520] RIP: 0033:0x7f13e7d85d82 [ 30.958978] 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 [ 30.961111] RSP: 002b:00007ffec98dd648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.961992] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f13e7d85d82 [ 30.962838] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f13e71bf000 [ 30.963696] RBP: 00007f13e71bf000 R08: 0000000000000009 R09: 0000000000001000 [ 30.964551] R10: 0000000000000812 R11: 0000000000000206 R12: 00005575edb0dd90 [ 30.965382] R13: 00007ffec98dd660 R14: 00007ffec98dd690 R15: 00007ffec98dd9f0 [ 30.966223] [ 30.966511] [ 30.966721] Allocated by task 211: [ 30.967141] kasan_save_stack+0x22/0x50 [ 30.967637] kasan_set_track+0x25/0x30 [ 30.968142] __kasan_slab_alloc+0x59/0x70 [ 30.968678] kmem_cache_alloc+0x16b/0x370 [ 30.969191] vm_area_dup+0x20/0x160 [ 30.969646] __split_vma+0x170/0x950 [ 30.970119] split_vma+0xc6/0x110 [ 30.970558] mprotect_fixup+0x8d2/0xb30 [ 30.971067] do_mprotect_pkey+0x87e/0xd40 [ 30.971610] __x64_sys_mprotect+0x78/0xc0 [ 30.972168] do_syscall_64+0x3f/0x90 [ 30.972669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.973335] [ 30.973561] Freed by task 211: [ 30.973973] kasan_save_stack+0x22/0x50 [ 30.974489] kasan_set_track+0x25/0x30 [ 30.974990] kasan_save_free_info+0x2b/0x50 [ 30.975544] __kasan_slab_free+0x10a/0x190 [ 30.976111] kmem_cache_free+0x10d/0x4d0 [ 30.976649] rcu_core+0x8c8/0x2860 [ 30.977113] __do_softirq+0x1b7/0x7d4 [ 30.977620] [ 30.977834] Last potentially related work creation: [ 30.978432] kasan_save_stack+0x22/0x50 [ 30.978932] __kasan_record_aux_stack+0x8e/0xa0 [ 30.979503] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.980169] remove_vma+0x139/0x170 [ 30.980625] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.981182] do_vmi_munmap+0x1f1/0x2b0 [ 30.981667] __vm_munmap+0x138/0x3a0 [ 30.982130] __x64_sys_munmap+0x59/0x80 [ 30.982627] do_syscall_64+0x3f/0x90 [ 30.983104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.983749] [ 30.983968] The buggy address belongs to the object at ffff88800efc09f8 [ 30.983968] which belongs to the cache vm_area_struct of size 168 [ 30.985446] The buggy address is located 88 bytes inside of [ 30.985446] freed 168-byte region [ffff88800efc09f8, ffff88800efc0aa0) [ 30.986847] [ 30.987066] The buggy address belongs to the physical page: [ 30.987720] page:000000005be99cfa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefc0 [ 30.988851] memcg:ffff8880169f5101 [ 30.989274] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.989922] page_type: 0xffffffff() [ 30.990377] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a39c0 dead000000000008 [ 30.991303] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169f5101 [ 30.992236] page dumped because: kasan: bad access detected [ 30.992906] [ 30.993121] Memory state around the buggy address: [ 30.993705] ffff88800efc0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.994561] ffff88800efc0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.995420] >ffff88800efc0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.996276] ^ [ 30.996973] ffff88800efc0a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.997837] ffff88800efc0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.998693] ================================================================== [ 30.999984] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.812074] BUG: Bad rss-counter state mm:0000000005f98012 type:MM_FILEPAGES val:33 [ 32.813072] BUG: Bad rss-counter state mm:0000000005f98012 type:MM_ANONPAGES val:22 [ 33.223487] BUG: Bad rss-counter state mm:0000000030bbd41b type:MM_FILEPAGES val:33 [ 33.224397] BUG: Bad rss-counter state mm:0000000030bbd41b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3498' (ECDSA) to the list of known hosts. 2023/06/20 15:53:41 fuzzer started 2023/06/20 15:53:41 dialing manager at localhost:36067 2023/06/20 15:53:41 checking machine... 2023/06/20 15:53:41 checking revisions... [ 33.952475] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:53:41 testing simple program... [ 33.994613] cgroup: Unknown subsys name 'net' [ 34.054700] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:53:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000003 RCX=ffffffff8363b5b4 RDX=ffff888015db0000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800f13fe78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff854f8820 R13=0000000000000000 R14=1ffff11001e27fd1 R15=dffffc0000000000 RIP=ffffffff814c0864 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 00007f6efe338900 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=00007f6efe8f00b0 CR3=0000000006ba2000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007ffcedb8ccd8 CR3=000000001866c000 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=2030343a33353a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a33353a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000