[ 23.942289] BUG: Bad rss-counter state mm:000000005adee48e type:MM_FILEPAGES val:33 [ 23.943540] BUG: Bad rss-counter state mm:000000005adee48e type:MM_ANONPAGES val:22 [ 24.106607] ================================================================== [ 24.107502] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.108418] Read of size 8 at addr ffff88800eac0228 by task sshd/219 [ 24.109488] [ 24.109747] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.110744] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.111894] Call Trace: [ 24.112266] [ 24.112597] dump_stack_lvl+0x91/0xf0 [ 24.113164] print_report+0xcc/0x620 [ 24.113763] ? __virt_addr_valid+0x102/0x340 [ 24.114556] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.115458] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.116307] kasan_report+0xbe/0xf0 [ 24.116862] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.117613] vma_interval_tree_remove+0xc75/0xec0 [ 24.118333] vma_prepare+0xc54/0x11a0 [ 24.118845] __split_vma+0x5af/0x950 [ 24.119305] ? __pfx___split_vma+0x10/0x10 [ 24.119822] ? find_held_lock+0x2c/0x110 [ 24.120335] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.120884] ? lock_is_held_type+0x9f/0x120 [ 24.121443] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.122037] ? mtree_range_walk+0x632/0x900 [ 24.122579] ? mas_walk+0x5c7/0x7c0 [ 24.123041] do_vmi_munmap+0x1f1/0x2b0 [ 24.123522] mmap_region+0x1f9/0x2660 [ 24.123999] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.124498] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.125191] ? __pfx_lock_acquire+0x10/0x10 [ 24.125716] ? __pfx_mmap_region+0x10/0x10 [ 24.126258] ? security_mmap_addr+0x7d/0xa0 [ 24.126786] ? get_unmapped_area+0x1f5/0x3f0 [ 24.127327] do_mmap+0x854/0xf00 [ 24.127761] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.128255] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.128828] ksys_mmap_pgoff+0x3af/0x500 [ 24.129331] do_syscall_64+0x3f/0x90 [ 24.129816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.130455] RIP: 0033:0x7f2f41e52d82 [ 24.130921] 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 [ 24.133002] RSP: 002b:00007fffe7745f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.133928] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f41e52d82 [ 24.134753] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f4128c000 [ 24.135583] RBP: 00007f2f4128c000 R08: 0000000000000009 R09: 0000000000001000 [ 24.136423] R10: 0000000000000812 R11: 0000000000000206 R12: 000056449503cd90 [ 24.137241] R13: 00007fffe7745f20 R14: 00007fffe7745f50 R15: 00007fffe77462b0 [ 24.138100] [ 24.138462] [ 24.138723] Allocated by task 212: [ 24.139237] kasan_save_stack+0x22/0x50 [ 24.139846] kasan_set_track+0x25/0x30 [ 24.140431] __kasan_slab_alloc+0x59/0x70 [ 24.140976] kmem_cache_alloc+0x16b/0x370 [ 24.141487] vm_area_dup+0x20/0x160 [ 24.141928] __split_vma+0x170/0x950 [ 24.142382] split_vma+0xc6/0x110 [ 24.142809] mprotect_fixup+0x8d2/0xb30 [ 24.143312] do_mprotect_pkey+0x87e/0xd40 [ 24.143811] __x64_sys_mprotect+0x78/0xc0 [ 24.144303] do_syscall_64+0x3f/0x90 [ 24.144752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.145355] [ 24.145564] Freed by task 203: [ 24.145955] kasan_save_stack+0x22/0x50 [ 24.146447] kasan_set_track+0x25/0x30 [ 24.146932] kasan_save_free_info+0x2b/0x50 [ 24.147454] __kasan_slab_free+0x10a/0x190 [ 24.147971] kmem_cache_free+0x10d/0x4d0 [ 24.148492] rcu_core+0x8c8/0x2860 [ 24.148932] __do_softirq+0x1b7/0x7d4 [ 24.149399] [ 24.149641] Last potentially related work creation: [ 24.150223] kasan_save_stack+0x22/0x50 [ 24.150728] __kasan_record_aux_stack+0x8e/0xa0 [ 24.151310] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.151947] remove_vma+0x139/0x170 [ 24.152389] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.152936] do_vmi_munmap+0x1f1/0x2b0 [ 24.153508] __vm_munmap+0x138/0x3a0 [ 24.154069] __x64_sys_munmap+0x59/0x80 [ 24.154664] do_syscall_64+0x3f/0x90 [ 24.155234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.156011] [ 24.156275] The buggy address belongs to the object at ffff88800eac01d0 [ 24.156275] which belongs to the cache vm_area_struct of size 168 [ 24.158065] The buggy address is located 88 bytes inside of [ 24.158065] freed 168-byte region [ffff88800eac01d0, ffff88800eac0278) [ 24.159418] [ 24.159628] The buggy address belongs to the physical page: [ 24.160246] page:00000000cd568593 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeac0 [ 24.161279] memcg:ffff88800c4c3401 [ 24.161751] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.162389] page_type: 0xffffffff() [ 24.162830] raw: 0100000000000200 ffff8880087a0c80 ffffea0000375ec0 dead000000000002 [ 24.163753] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4c3401 [ 24.164635] page dumped because: kasan: bad access detected [ 24.165293] [ 24.165511] Memory state around the buggy address: [ 24.166102] ffff88800eac0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.166946] ffff88800eac0180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.167803] >ffff88800eac0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.168671] ^ [ 24.169231] ffff88800eac0280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.170101] ffff88800eac0300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.170983] ================================================================== [ 24.172259] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.547249] BUG: Bad rss-counter state mm:0000000082f8bbc4 type:MM_FILEPAGES val:33 [ 26.548466] BUG: Bad rss-counter state mm:0000000082f8bbc4 type:MM_ANONPAGES val:22 [ 27.104125] BUG: Bad rss-counter state mm:000000003e21cf59 type:MM_FILEPAGES val:33 [ 27.105319] BUG: Bad rss-counter state mm:000000003e21cf59 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29365' (ECDSA) to the list of known hosts. 2023/06/20 20:39:53 fuzzer started 2023/06/20 20:39:54 dialing manager at localhost:36067 2023/06/20 20:39:54 checking machine... 2023/06/20 20:39:54 checking revisions... [ 27.831924] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:39:54 testing simple program... [ 27.888327] cgroup: Unknown subsys name 'net' [ 27.938008] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:39:53 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=ffffffff860d8201 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a80 R8 =ffffffff860d825a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800ec97b30 RIP=ffffffff8113038e 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 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=00007ffcd58262d8 CR3=000000000d82a000 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=2033353a39333a3032203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a39333a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000558f45175380 RCX=00000000000001ae RDX=0000558f45175380 RSI=0000000000000000 RDI=0000000000000000 RBP=0000558f45175620 RSP=00007fff8d799828 R8 =000000000000001a R9 =00007fff8d7cd080 R10=00007fff8d7cd0f0 R11=000000000000cb60 R12=0005fe95a746f35b R13=000000000000000c R14=00007fff8d799880 R15=000000000000000c RIP=00007f25584e4b30 RFL=00000246 [---Z-P-] 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 00007f25579f3900 00000000 00000000 GS =0000 0000000000000000 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=00007f4f25b38650 CR3=000000000d62c000 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=0bcfbedf3b09b38c3b45f743a57ad45e XMM02=ec2efd57dc4c00df000000000011ac80 XMM03=dbe04a7b52eb0eae000000000011ad50 XMM04=68443cf9ca5b76f200000000000ae988 XMM05=11a8c9d47a6749890000000000132218 XMM06=806171799158d9670000000000130c98 XMM07=fb795ef6d65770560000000000120fd8 XMM08=2c67c8bc2e329bc3000000000011acf0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000