syzkaller login: [ 28.997991] BUG: Bad rss-counter state mm:00000000c03d8e09 type:MM_FILEPAGES val:33 [ 28.999199] BUG: Bad rss-counter state mm:00000000c03d8e09 type:MM_ANONPAGES val:22 [ 29.212352] ================================================================== [ 29.213280] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.214244] Read of size 8 at addr ffff88800d82ed08 by task sshd/222 [ 29.215006] [ 29.215224] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.216236] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.217207] Call Trace: [ 29.217524] [ 29.217826] dump_stack_lvl+0x91/0xf0 [ 29.218326] print_report+0xcc/0x620 [ 29.218813] ? __virt_addr_valid+0x102/0x340 [ 29.219362] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.219980] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.220599] kasan_report+0xbe/0xf0 [ 29.221070] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.221693] vma_interval_tree_remove+0xc75/0xec0 [ 29.222306] vma_prepare+0xc54/0x11a0 [ 29.222782] __split_vma+0x5af/0x950 [ 29.223253] ? __pfx___split_vma+0x10/0x10 [ 29.223775] ? find_held_lock+0x2c/0x110 [ 29.224294] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.224859] ? lock_is_held_type+0x9f/0x120 [ 29.225395] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.226002] ? mtree_range_walk+0x632/0x900 [ 29.226574] ? mas_walk+0x5c7/0x7c0 [ 29.227049] do_vmi_munmap+0x1f1/0x2b0 [ 29.227539] mmap_region+0x1f9/0x2660 [ 29.228027] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.228531] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.229239] ? __pfx_lock_acquire+0x10/0x10 [ 29.229769] ? __pfx_mmap_region+0x10/0x10 [ 29.230302] ? security_mmap_addr+0x7d/0xa0 [ 29.230825] ? get_unmapped_area+0x1f5/0x3f0 [ 29.231377] do_mmap+0x854/0xf00 [ 29.231812] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.232302] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.232872] ksys_mmap_pgoff+0x3af/0x500 [ 29.233375] do_syscall_64+0x3f/0x90 [ 29.233856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.234523] RIP: 0033:0x7fec3e74ed82 [ 29.234983] 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 [ 29.237101] RSP: 002b:00007ffc63fa6618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.237998] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec3e74ed82 [ 29.238838] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec3db88000 [ 29.239681] RBP: 00007fec3db88000 R08: 0000000000000009 R09: 0000000000001000 [ 29.240528] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561960127ec0 [ 29.241371] R13: 00007ffc63fa6630 R14: 00007ffc63fa6660 R15: 00007ffc63fa69c0 [ 29.242226] [ 29.242518] [ 29.242732] Allocated by task 212: [ 29.243155] kasan_save_stack+0x22/0x50 [ 29.243656] kasan_set_track+0x25/0x30 [ 29.244144] __kasan_slab_alloc+0x59/0x70 [ 29.244660] kmem_cache_alloc+0x16b/0x370 [ 29.245171] vm_area_dup+0x20/0x160 [ 29.245626] __split_vma+0x170/0x950 [ 29.246089] split_vma+0xc6/0x110 [ 29.246546] mprotect_fixup+0x8d2/0xb30 [ 29.247046] do_mprotect_pkey+0x87e/0xd40 [ 29.247561] __x64_sys_mprotect+0x78/0xc0 [ 29.248079] do_syscall_64+0x3f/0x90 [ 29.248551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.249194] [ 29.249407] Freed by task 212: [ 29.249798] kasan_save_stack+0x22/0x50 [ 29.250305] kasan_set_track+0x25/0x30 [ 29.250797] kasan_save_free_info+0x2b/0x50 [ 29.251324] __kasan_slab_free+0x10a/0x190 [ 29.251855] kmem_cache_free+0x10d/0x4d0 [ 29.252362] rcu_core+0x8c8/0x2860 [ 29.252801] __do_softirq+0x1b7/0x7d4 [ 29.253273] [ 29.253489] Last potentially related work creation: [ 29.254074] kasan_save_stack+0x22/0x50 [ 29.254588] __kasan_record_aux_stack+0x8e/0xa0 [ 29.255156] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.255791] remove_vma+0x139/0x170 [ 29.256239] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.256925] do_vmi_munmap+0x1f1/0x2b0 [ 29.257408] __vm_munmap+0x138/0x3a0 [ 29.257870] __x64_sys_munmap+0x59/0x80 [ 29.258372] do_syscall_64+0x3f/0x90 [ 29.258848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.259483] [ 29.259697] The buggy address belongs to the object at ffff88800d82ecb0 [ 29.259697] which belongs to the cache vm_area_struct of size 168 [ 29.261179] The buggy address is located 88 bytes inside of [ 29.261179] freed 168-byte region [ffff88800d82ecb0, ffff88800d82ed58) [ 29.262599] [ 29.262812] The buggy address belongs to the physical page: [ 29.263466] page:0000000049aad85d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd82e [ 29.264543] memcg:ffff8880095cc301 [ 29.264970] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.265665] page_type: 0xffffffff() [ 29.266115] raw: 0100000000000200 ffff8880087a0c80 ffffea0000374040 dead000000000003 [ 29.267044] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095cc301 [ 29.267944] page dumped because: kasan: bad access detected [ 29.268594] [ 29.268805] Memory state around the buggy address: [ 29.269384] ffff88800d82ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.270265] ffff88800d82ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.271119] >ffff88800d82ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.271967] ^ [ 29.272402] ffff88800d82ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.273253] ffff88800d82ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 29.274091] ================================================================== [ 29.275029] Disabling lock debugging due to kernel taint [ 31.578277] BUG: Bad rss-counter state mm:000000008ff00b09 type:MM_FILEPAGES val:33 [ 31.579512] BUG: Bad rss-counter state mm:000000008ff00b09 type:MM_ANONPAGES val:22 [ 32.040797] BUG: Bad rss-counter state mm:000000006fc71744 type:MM_FILEPAGES val:33 [ 32.041782] BUG: Bad rss-counter state mm:000000006fc71744 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28677' (ECDSA) to the list of known hosts. 2023/06/21 04:38:46 fuzzer started 2023/06/21 04:38:46 dialing manager at localhost:36067 2023/06/21 04:38:46 checking machine... 2023/06/21 04:38:46 checking revisions... [ 32.777553] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:38:46 testing simple program... [ 32.832504] cgroup: Unknown subsys name 'net' [ 32.884728] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:38:45 Registers: info registers vcpu 0 RAX=1ffffffff0c09ebd RBX=ffffffff8604f5e8 RCX=ffffffff8451105d RDX=0000000000000000 RSI=ffffffff864b2f26 RDI=ffffffff8604f5d8 RBP=ffffffff8604f5e8 RSP=ffff88806ce099e0 R8 =ffffffff864b2f26 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffffffff8604f5e8 R13=ffffffff8604f5d8 R14=ffffffff8604f5e4 R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000216 [----AP-] 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=00007ffdfd82e4b8 CR3=000000001025a000 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=2035343a38333a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a38333a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8185af32 RDX=00000000000085af RSI=00000000000085af RDI=ffffffff8650b0ac RBP=ffff8880102e7428 RSP=ffff8880102e7360 R8 =0000000000000000 R9 =ffff8880102e7410 R10=0000000000038001 R11=00000000000223eb R12=ffff8880102e7430 R13=ffff8880102e7418 R14=ffff8880102e7411 R15=ffff8880102e73d0 RIP=ffffffff8113077a RFL=00000213 [----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 00007fd2319aa900 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=00007ffba4ee9650 CR3=000000000c93a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=bfbc4dd05421826600000000000ae988 XMM05=a6c47e98c15855ba0000000000133b00 XMM06=4fda316b135da52b00000000001328f0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000