[ 23.910150] BUG: Bad rss-counter state mm:00000000ac9f7b80 type:MM_FILEPAGES val:33 [ 23.911101] BUG: Bad rss-counter state mm:00000000ac9f7b80 type:MM_ANONPAGES val:22 [ 24.074874] ================================================================== [ 24.075743] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.076623] Read of size 8 at addr ffff88800e08c058 by task sshd/219 [ 24.077383] [ 24.077591] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.078545] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.079480] Call Trace: [ 24.079781] [ 24.080052] dump_stack_lvl+0x91/0xf0 [ 24.080521] print_report+0xcc/0x620 [ 24.080995] ? __virt_addr_valid+0x102/0x340 [ 24.081569] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.082154] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.082738] kasan_report+0xbe/0xf0 [ 24.083189] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.083778] vma_interval_tree_remove+0xc75/0xec0 [ 24.084349] vma_prepare+0xc54/0x11a0 [ 24.084802] __split_vma+0x5af/0x950 [ 24.085249] ? __pfx___split_vma+0x10/0x10 [ 24.085798] ? find_held_lock+0x2c/0x110 [ 24.086329] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.086890] ? lock_is_held_type+0x9f/0x120 [ 24.087430] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.088033] ? mtree_range_walk+0x632/0x900 [ 24.088588] ? mas_walk+0x5c7/0x7c0 [ 24.089067] do_vmi_munmap+0x1f1/0x2b0 [ 24.089599] mmap_region+0x1f9/0x2660 [ 24.090081] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.090591] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.091306] ? __pfx_lock_acquire+0x10/0x10 [ 24.091834] ? __pfx_mmap_region+0x10/0x10 [ 24.092368] ? security_mmap_addr+0x7d/0xa0 [ 24.092904] ? get_unmapped_area+0x1f5/0x3f0 [ 24.093493] do_mmap+0x854/0xf00 [ 24.093936] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.094431] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.094990] ksys_mmap_pgoff+0x3af/0x500 [ 24.095488] do_syscall_64+0x3f/0x90 [ 24.095967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.096612] RIP: 0033:0x7f0d2d861d82 [ 24.097066] 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 [ 24.099227] RSP: 002b:00007fff30459ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.100144] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0d2d861d82 [ 24.100988] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0d2cc9b000 [ 24.101878] RBP: 00007f0d2cc9b000 R08: 0000000000000009 R09: 0000000000001000 [ 24.102722] R10: 0000000000000812 R11: 0000000000000206 R12: 00005555fec67ec0 [ 24.103563] R13: 00007fff30459cc0 R14: 00007fff30459cf0 R15: 00007fff3045a050 [ 24.104419] [ 24.104700] [ 24.104909] Allocated by task 212: [ 24.105369] kasan_save_stack+0x22/0x50 [ 24.105869] kasan_set_track+0x25/0x30 [ 24.106359] __kasan_slab_alloc+0x59/0x70 [ 24.106884] kmem_cache_alloc+0x16b/0x370 [ 24.107408] vm_area_dup+0x20/0x160 [ 24.107858] __split_vma+0x170/0x950 [ 24.108382] split_vma+0xc6/0x110 [ 24.108935] mprotect_fixup+0x8d2/0xb30 [ 24.109467] do_mprotect_pkey+0x87e/0xd40 [ 24.109985] __x64_sys_mprotect+0x78/0xc0 [ 24.110504] do_syscall_64+0x3f/0x90 [ 24.111033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.111736] [ 24.111958] Freed by task 212: [ 24.112359] kasan_save_stack+0x22/0x50 [ 24.112868] kasan_set_track+0x25/0x30 [ 24.113410] kasan_save_free_info+0x2b/0x50 [ 24.113945] __kasan_slab_free+0x10a/0x190 [ 24.114477] kmem_cache_free+0x10d/0x4d0 [ 24.114982] rcu_core+0x8c8/0x2860 [ 24.115432] __do_softirq+0x1b7/0x7d4 [ 24.115906] [ 24.116122] Last potentially related work creation: [ 24.116708] kasan_save_stack+0x22/0x50 [ 24.117213] __kasan_record_aux_stack+0x8e/0xa0 [ 24.117807] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.118452] remove_vma+0x139/0x170 [ 24.118901] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.119525] do_vmi_munmap+0x1f1/0x2b0 [ 24.120010] __vm_munmap+0x138/0x3a0 [ 24.120471] __x64_sys_munmap+0x59/0x80 [ 24.120969] do_syscall_64+0x3f/0x90 [ 24.121492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.122131] [ 24.122349] The buggy address belongs to the object at ffff88800e08c000 [ 24.122349] which belongs to the cache vm_area_struct of size 168 [ 24.123807] The buggy address is located 88 bytes inside of [ 24.123807] freed 168-byte region [ffff88800e08c000, ffff88800e08c0a8) [ 24.125208] [ 24.125449] The buggy address belongs to the physical page: [ 24.126100] page:000000003ce0f203 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe08c [ 24.127180] memcg:ffff88800d34e301 [ 24.127608] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.128253] page_type: 0xffffffff() [ 24.128699] raw: 0100000000000200 ffff8880087a0c80 ffffea0000380ec0 dead000000000004 [ 24.129651] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d34e301 [ 24.130570] page dumped because: kasan: bad access detected [ 24.131233] [ 24.131445] Memory state around the buggy address: [ 24.132022] ffff88800e08bf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 24.132881] ffff88800e08bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.133762] >ffff88800e08c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.134606] ^ [ 24.135332] ffff88800e08c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 24.136178] ffff88800e08c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.137031] ================================================================== [ 24.138044] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.850930] BUG: Bad rss-counter state mm:00000000960692e4 type:MM_FILEPAGES val:33 [ 26.851910] BUG: Bad rss-counter state mm:00000000960692e4 type:MM_ANONPAGES val:22 [ 27.358297] BUG: Bad rss-counter state mm:0000000086d73dba type:MM_FILEPAGES val:33 [ 27.359288] BUG: Bad rss-counter state mm:0000000086d73dba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49850' (ECDSA) to the list of known hosts. 2023/06/20 17:32:09 fuzzer started 2023/06/20 17:32:09 dialing manager at localhost:36067 2023/06/20 17:32:09 checking machine... 2023/06/20 17:32:09 checking revisions... [ 28.097832] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:32:09 testing simple program... [ 28.151291] cgroup: Unknown subsys name 'net' [ 28.190645] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:32:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f7d60004a60 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=00007f7d60004a78 RBP=00007f7d6f868770 RSP=00007f7d6f8686c0 R8 =00007f7d60004a60 R9 =0000000000000640 R10=a3d70a3d70a3d70b R11=2ce33e6c02ce33e7 R12=000000006491e299 R13=0000000000001fa0 R14=00007f7d60000ba0 R15=0000000000000003 RIP=0000561078cd70db RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7d6f86c700 00000000 00000000 GS =0000 0000000000000000 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=00007ff3b753cc50 CR3=0000000014658000 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=00000000000000003043545500435455 XMM02=63736964203a31313a38353934332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383539 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff8880181a7570 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=0000000000120011 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff11003034eaf RIP=ffffffff845368c8 RFL=00000002 [-------] 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 00007f5add513900 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=00007f5addac8650 CR3=000000000e290000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000