syzkaller login: [ 31.235250] BUG: Bad rss-counter state mm:000000005fd495c6 type:MM_FILEPAGES val:33 [ 31.237191] BUG: Bad rss-counter state mm:000000005fd495c6 type:MM_ANONPAGES val:22 [ 31.398703] ================================================================== [ 31.399619] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.400588] Read of size 8 at addr ffff88800d8a5ed8 by task sshd/222 [ 31.401388] [ 31.401701] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.402607] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.403640] Call Trace: [ 31.404002] [ 31.404302] dump_stack_lvl+0x91/0xf0 [ 31.404808] print_report+0xcc/0x620 [ 31.405303] ? __virt_addr_valid+0x102/0x340 [ 31.405864] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.406534] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.407211] kasan_report+0xbe/0xf0 [ 31.407711] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.408364] vma_interval_tree_remove+0xc75/0xec0 [ 31.408995] vma_prepare+0xc54/0x11a0 [ 31.409499] __split_vma+0x5af/0x950 [ 31.409978] ? __pfx___split_vma+0x10/0x10 [ 31.410509] ? find_held_lock+0x2c/0x110 [ 31.411062] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.411661] ? lock_is_held_type+0x9f/0x120 [ 31.412203] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.412815] ? mtree_range_walk+0x632/0x900 [ 31.413373] ? mas_walk+0x5c7/0x7c0 [ 31.413849] do_vmi_munmap+0x1f1/0x2b0 [ 31.414344] mmap_region+0x1f9/0x2660 [ 31.414853] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.415376] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.416085] ? __pfx_lock_acquire+0x10/0x10 [ 31.416618] ? __pfx_mmap_region+0x10/0x10 [ 31.417151] ? security_mmap_addr+0x7d/0xa0 [ 31.417685] ? get_unmapped_area+0x1f5/0x3f0 [ 31.418249] do_mmap+0x854/0xf00 [ 31.418714] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.419240] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.419820] ksys_mmap_pgoff+0x3af/0x500 [ 31.420329] do_syscall_64+0x3f/0x90 [ 31.420810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.421460] RIP: 0033:0x7f0aa22d6d82 [ 31.421924] 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 [ 31.424068] RSP: 002b:00007fff9c6a7e98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.424975] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0aa22d6d82 [ 31.425872] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0aa1710000 [ 31.426780] RBP: 00007f0aa1710000 R08: 0000000000000009 R09: 0000000000001000 [ 31.427630] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a0fbbc2ec0 [ 31.428479] R13: 00007fff9c6a7eb0 R14: 00007fff9c6a7ee0 R15: 00007fff9c6a8240 [ 31.429343] [ 31.429637] [ 31.429852] Allocated by task 215: [ 31.430280] kasan_save_stack+0x22/0x50 [ 31.430818] kasan_set_track+0x25/0x30 [ 31.431333] __kasan_slab_alloc+0x59/0x70 [ 31.431864] kmem_cache_alloc+0x16b/0x370 [ 31.432384] vm_area_dup+0x20/0x160 [ 31.432839] __split_vma+0x170/0x950 [ 31.433306] split_vma+0xc6/0x110 [ 31.433766] mprotect_fixup+0x8d2/0xb30 [ 31.434295] do_mprotect_pkey+0x87e/0xd40 [ 31.434869] __x64_sys_mprotect+0x78/0xc0 [ 31.435414] do_syscall_64+0x3f/0x90 [ 31.435905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.436583] [ 31.436808] Freed by task 215: [ 31.437211] kasan_save_stack+0x22/0x50 [ 31.437730] kasan_set_track+0x25/0x30 [ 31.438250] kasan_save_free_info+0x2b/0x50 [ 31.438816] __kasan_slab_free+0x10a/0x190 [ 31.439359] kmem_cache_free+0x10d/0x4d0 [ 31.439887] rcu_core+0x8c8/0x2860 [ 31.440340] __do_softirq+0x1b7/0x7d4 [ 31.440831] [ 31.441052] Last potentially related work creation: [ 31.441663] kasan_save_stack+0x22/0x50 [ 31.442186] __kasan_record_aux_stack+0x8e/0xa0 [ 31.442786] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.443454] remove_vma+0x139/0x170 [ 31.443925] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.444495] do_vmi_munmap+0x1f1/0x2b0 [ 31.445007] __vm_munmap+0x138/0x3a0 [ 31.445496] __x64_sys_munmap+0x59/0x80 [ 31.445990] do_syscall_64+0x3f/0x90 [ 31.446472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.447124] [ 31.447343] Second to last potentially related work creation: [ 31.448027] kasan_save_stack+0x22/0x50 [ 31.448532] __kasan_record_aux_stack+0x8e/0xa0 [ 31.449108] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.449746] remove_vma+0x139/0x170 [ 31.450204] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.450789] do_vmi_munmap+0x1f1/0x2b0 [ 31.451300] __vm_munmap+0x138/0x3a0 [ 31.451778] elf_map+0x26f/0x310 [ 31.452230] load_elf_binary+0x3417/0x5030 [ 31.452766] bprm_execve+0x803/0x1940 [ 31.453232] do_execveat_common+0x734/0x8e0 [ 31.453764] __x64_sys_execve+0x93/0xc0 [ 31.454267] do_syscall_64+0x3f/0x90 [ 31.454817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.455470] [ 31.455691] The buggy address belongs to the object at ffff88800d8a5e80 [ 31.455691] which belongs to the cache vm_area_struct of size 168 [ 31.457193] The buggy address is located 88 bytes inside of [ 31.457193] freed 168-byte region [ffff88800d8a5e80, ffff88800d8a5f28) [ 31.458650] [ 31.458875] The buggy address belongs to the physical page: [ 31.459574] page:00000000686dbb81 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8a5 [ 31.460670] memcg:ffff88800d8f0201 [ 31.461099] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.461803] page_type: 0xffffffff() [ 31.462257] raw: 0100000000000200 ffff8880087a0c80 ffffea00003be380 dead000000000003 [ 31.463192] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8f0201 [ 31.464103] page dumped because: kasan: bad access detected [ 31.464765] [ 31.464982] Memory state around the buggy address: [ 31.465569] ffff88800d8a5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.466462] ffff88800d8a5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.467360] >ffff88800d8a5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.468254] ^ [ 31.469016] ffff88800d8a5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.469881] ffff88800d8a5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.470746] ================================================================== [ 31.472024] Disabling lock debugging due to kernel taint [ 33.508088] BUG: Bad rss-counter state mm:000000007ef3223e type:MM_FILEPAGES val:33 [ 33.509079] BUG: Bad rss-counter state mm:000000007ef3223e type:MM_ANONPAGES val:22 [ 33.888774] BUG: Bad rss-counter state mm:00000000664fda36 type:MM_FILEPAGES val:33 [ 33.889774] BUG: Bad rss-counter state mm:00000000664fda36 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45333' (ECDSA) to the list of known hosts. 2023/06/20 19:42:09 fuzzer started 2023/06/20 19:42:09 dialing manager at localhost:36067 2023/06/20 19:42:09 checking machine... 2023/06/20 19:42:09 checking revisions... [ 34.657251] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:42:09 testing simple program... [ 34.708003] cgroup: Unknown subsys name 'net' [ 34.760399] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:42:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff86621200 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff813a0b26 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888019b3fb30 RIP=ffffffff813a0b26 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=00007f997f166000 CR3=000000000c986000 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=2039303a32343a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a32343a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001f2a284 RBX=0000000000000018 RCX=dffffc0000000000 RDX=ffff888016563680 RSI=ffffffff844a4ffb RDI=ffff88800f951420 RBP=ffff88800f951408 RSP=ffff888015b8fcc8 R8 =0000000000000000 R9 =0000000000000003 R10=0000000000000008 R11=0000000000000000 R12=0000000000000003 R13=0000000000000008 R14=00007fecc7fe8008 R15=00007fecc7fe4fff RIP=ffffffff844a5015 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fecc801e900 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=00007fecc7fe8008 CR3=000000001948e000 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=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