syzkaller login: [ 36.298123] BUG: Bad rss-counter state mm:000000007f33cacc type:MM_FILEPAGES val:33 [ 36.299798] BUG: Bad rss-counter state mm:000000007f33cacc type:MM_ANONPAGES val:22 [ 36.445969] ================================================================== [ 36.447066] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.448100] Read of size 8 at addr ffff88800e1a04e0 by task sshd/220 [ 36.448996] [ 36.449217] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.450070] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.451061] Call Trace: [ 36.451388] [ 36.451675] dump_stack_lvl+0x91/0xf0 [ 36.452174] print_report+0xcc/0x620 [ 36.452656] ? __virt_addr_valid+0x102/0x340 [ 36.453225] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.453848] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.454466] kasan_report+0xbe/0xf0 [ 36.454952] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.455588] vma_interval_tree_remove+0xc75/0xec0 [ 36.456204] vma_prepare+0xc54/0x11a0 [ 36.456689] __split_vma+0x5af/0x950 [ 36.457167] ? __pfx___split_vma+0x10/0x10 [ 36.457702] ? find_held_lock+0x2c/0x110 [ 36.458234] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.458801] ? lock_is_held_type+0x9f/0x120 [ 36.459374] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.459985] ? mtree_range_walk+0x632/0x900 [ 36.460537] ? mas_walk+0x5c7/0x7c0 [ 36.461015] do_vmi_munmap+0x1f1/0x2b0 [ 36.461507] mmap_region+0x1f9/0x2660 [ 36.461999] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.462513] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.463237] ? __pfx_lock_acquire+0x10/0x10 [ 36.463781] ? __pfx_mmap_region+0x10/0x10 [ 36.464315] ? security_mmap_addr+0x7d/0xa0 [ 36.464848] ? get_unmapped_area+0x1f5/0x3f0 [ 36.465402] do_mmap+0x854/0xf00 [ 36.465838] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.466339] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.466909] ksys_mmap_pgoff+0x3af/0x500 [ 36.467427] do_syscall_64+0x3f/0x90 [ 36.467907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.468557] RIP: 0033:0x7f0f35997d82 [ 36.469015] 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 [ 36.471153] RSP: 002b:00007ffd64fea2d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.472075] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f35997d82 [ 36.472916] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f34dd1000 [ 36.473768] RBP: 00007f0f34dd1000 R08: 0000000000000009 R09: 0000000000001000 [ 36.474618] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555c88315b20 [ 36.475485] R13: 00007ffd64fea2f0 R14: 00007ffd64fea320 R15: 00007ffd64fea680 [ 36.476340] [ 36.476641] [ 36.476859] Allocated by task 213: [ 36.477302] kasan_save_stack+0x22/0x50 [ 36.477805] kasan_set_track+0x25/0x30 [ 36.478303] __kasan_slab_alloc+0x59/0x70 [ 36.478828] kmem_cache_alloc+0x16b/0x370 [ 36.479354] vm_area_dup+0x20/0x160 [ 36.479807] __split_vma+0x170/0x950 [ 36.480277] split_vma+0xc6/0x110 [ 36.480722] mprotect_fixup+0x8d2/0xb30 [ 36.481230] do_mprotect_pkey+0x87e/0xd40 [ 36.481763] __x64_sys_mprotect+0x78/0xc0 [ 36.482288] do_syscall_64+0x3f/0x90 [ 36.482764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.483433] [ 36.483653] Freed by task 213: [ 36.484046] kasan_save_stack+0x22/0x50 [ 36.484548] kasan_set_track+0x25/0x30 [ 36.485053] kasan_save_free_info+0x2b/0x50 [ 36.485592] __kasan_slab_free+0x10a/0x190 [ 36.486132] kmem_cache_free+0x10d/0x4d0 [ 36.486643] rcu_core+0x8c8/0x2860 [ 36.487095] __do_softirq+0x1b7/0x7d4 [ 36.487581] [ 36.487800] Last potentially related work creation: [ 36.488395] kasan_save_stack+0x22/0x50 [ 36.488901] __kasan_record_aux_stack+0x8e/0xa0 [ 36.489477] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.490129] remove_vma+0x139/0x170 [ 36.490580] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.491149] do_vmi_munmap+0x1f1/0x2b0 [ 36.491649] __vm_munmap+0x138/0x3a0 [ 36.492129] __x64_sys_munmap+0x59/0x80 [ 36.492635] do_syscall_64+0x3f/0x90 [ 36.493119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.493764] [ 36.493982] Second to last potentially related work creation: [ 36.494665] kasan_save_stack+0x22/0x50 [ 36.495182] __kasan_record_aux_stack+0x8e/0xa0 [ 36.495763] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.496412] remove_vma+0x139/0x170 [ 36.496869] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.497430] do_vmi_munmap+0x1f1/0x2b0 [ 36.497917] __vm_munmap+0x138/0x3a0 [ 36.498384] elf_map+0x26f/0x310 [ 36.498833] load_elf_binary+0x3417/0x5030 [ 36.499380] bprm_execve+0x803/0x1940 [ 36.499850] do_execveat_common+0x734/0x8e0 [ 36.500383] __x64_sys_execve+0x93/0xc0 [ 36.500881] do_syscall_64+0x3f/0x90 [ 36.501364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.502001] [ 36.502216] The buggy address belongs to the object at ffff88800e1a0488 [ 36.502216] which belongs to the cache vm_area_struct of size 168 [ 36.503714] The buggy address is located 88 bytes inside of [ 36.503714] freed 168-byte region [ffff88800e1a0488, ffff88800e1a0530) [ 36.505134] [ 36.505356] The buggy address belongs to the physical page: [ 36.506011] page:00000000d67b211e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1a0 [ 36.507093] memcg:ffff88800ff10a01 [ 36.507536] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.508246] page_type: 0xffffffff() [ 36.508702] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 36.509629] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff10a01 [ 36.510549] page dumped because: kasan: bad access detected [ 36.511218] [ 36.511439] Memory state around the buggy address: [ 36.512022] ffff88800e1a0380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.512883] ffff88800e1a0400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 36.513741] >ffff88800e1a0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.514619] ^ [ 36.515374] ffff88800e1a0500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 36.516234] ffff88800e1a0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.517104] ================================================================== [ 36.518249] Disabling lock debugging due to kernel taint [ 39.251406] BUG: Bad rss-counter state mm:0000000044649f87 type:MM_FILEPAGES val:33 [ 39.252403] BUG: Bad rss-counter state mm:0000000044649f87 type:MM_ANONPAGES val:22 [ 39.717810] BUG: Bad rss-counter state mm:00000000141fef43 type:MM_FILEPAGES val:33 [ 39.718724] BUG: Bad rss-counter state mm:00000000141fef43 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54099' (ECDSA) to the list of known hosts. 2023/06/19 21:16:13 fuzzer started 2023/06/19 21:16:13 dialing manager at localhost:44161 2023/06/19 21:16:13 checking machine... 2023/06/19 21:16:13 checking revisions... [ 40.514234] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:16:14 testing simple program... [ 40.563781] cgroup: Unknown subsys name 'net' [ 40.609236] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:16:08 Registers: info registers vcpu 0 RAX=00000000ffffffff RBX=0000000000000000 RCX=0000000000000001 RDX=1ffffd40000df8a6 RSI=ffffea00006fc580 RDI=ffffea00006fc530 RBP=ffffea00006fc500 RSP=ffff88806ce09c40 R8 =0000000000000000 R9 =ffff88807ffdc600 R10=ffffea00006fc5f0 R11=000000000001bf17 R12=0000000000000001 R13=ffffea00006fc580 R14=ffffea00006fc580 R15=ffff88807ffdc500 RIP=ffffffff81789b6d RFL=00000046 [---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=00007fc02e7e5000 CR3=000000000c932000 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=c46646ea8f9aec897c4d1b45fbe289b1 XMM02=000000000011da00eff9b2d0a8fce9cb XMM03=000000000011dad02c67c8bc2e329bc3 XMM04=1ed898d05689f79200000000000ae988 XMM05=4d0d2cd25256173c0000000000135f30 XMM06=00c3ffa147b8d8570000000000135928 XMM07=e042d86d42eb936e00000000001249f8 XMM08=4c458466d09b48f4000000000011dad0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800c9dc20c RCX=ffffffff8449ef86 RDX=ffff888016978000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880180c7cc0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000004 R13=ffff888019fe5380 R14=00007f48f864d000 R15=00007f48f86bdfff RIP=ffffffff814c0245 RFL=00000293 [--S-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f48f8689900 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=00007f48f864e008 CR3=000000000fcf4000 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