syzkaller login: [ 35.878594] BUG: Bad rss-counter state mm:00000000c39dd346 type:MM_FILEPAGES val:33 [ 35.879315] BUG: Bad rss-counter state mm:00000000c39dd346 type:MM_ANONPAGES val:22 [ 35.937215] ================================================================== [ 35.937810] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.938404] Read of size 8 at addr ffff88800f6baa50 by task sshd/220 [ 35.950828] [ 35.950989] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.951555] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.952192] Call Trace: [ 35.952412] [ 35.952609] dump_stack_lvl+0x91/0xf0 [ 35.952947] print_report+0xcc/0x620 [ 35.953278] ? __virt_addr_valid+0x102/0x340 [ 35.953649] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.954062] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.954472] kasan_report+0xbe/0xf0 [ 35.954824] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.955230] vma_interval_tree_remove+0xc75/0xec0 [ 35.955631] vma_prepare+0xc54/0x11a0 [ 35.955956] __split_vma+0x5af/0x950 [ 35.956276] ? __pfx___split_vma+0x10/0x10 [ 35.956644] ? find_held_lock+0x2c/0x110 [ 35.957002] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.957385] ? lock_is_held_type+0x9f/0x120 [ 35.957763] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.958231] ? mtree_range_walk+0x632/0x900 [ 35.958683] ? mas_walk+0x5c7/0x7c0 [ 35.959057] do_vmi_munmap+0x1f1/0x2b0 [ 35.959440] mmap_region+0x1f9/0x2660 [ 35.959821] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.960217] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.960735] ? __pfx_lock_acquire+0x10/0x10 [ 35.961101] ? __pfx_mmap_region+0x10/0x10 [ 35.961463] ? security_mmap_addr+0x7d/0xa0 [ 35.961863] ? get_unmapped_area+0x1f5/0x3f0 [ 35.962229] do_mmap+0x854/0xf00 [ 35.962566] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.962954] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.963386] ksys_mmap_pgoff+0x3af/0x500 [ 35.963776] do_syscall_64+0x3f/0x90 [ 35.964147] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.964648] RIP: 0033:0x7fe7df3b0d82 [ 35.964998] 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 [ 35.966639] RSP: 002b:00007ffe24bf98e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.967331] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe7df3b0d82 [ 35.967975] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe7de7ea000 [ 35.968620] RBP: 00007fe7de7ea000 R08: 0000000000000009 R09: 0000000000001000 [ 35.969269] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce5122ad90 [ 35.969871] R13: 00007ffe24bf9900 R14: 00007ffe24bf9930 R15: 00007ffe24bf9c90 [ 35.970428] [ 35.970640] [ 35.970812] Allocated by task 213: [ 35.971143] kasan_save_stack+0x22/0x50 [ 35.971533] kasan_set_track+0x25/0x30 [ 35.971910] __kasan_slab_alloc+0x59/0x70 [ 35.972319] kmem_cache_alloc+0x16b/0x370 [ 35.972722] vm_area_dup+0x20/0x160 [ 35.973060] __split_vma+0x170/0x950 [ 35.973412] split_vma+0xc6/0x110 [ 35.973879] mprotect_fixup+0x8d2/0xb30 [ 35.974218] do_mprotect_pkey+0x87e/0xd40 [ 35.974588] __x64_sys_mprotect+0x78/0xc0 [ 35.974951] do_syscall_64+0x3f/0x90 [ 35.975273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.975777] [ 35.975945] Freed by task 213: [ 35.976235] kasan_save_stack+0x22/0x50 [ 35.976610] kasan_set_track+0x25/0x30 [ 35.976979] kasan_save_free_info+0x2b/0x50 [ 35.977347] __kasan_slab_free+0x10a/0x190 [ 35.977709] kmem_cache_free+0x10d/0x4d0 [ 35.978056] rcu_core+0x8c8/0x2860 [ 35.978358] __do_softirq+0x1b7/0x7d4 [ 35.978694] [ 35.978843] Last potentially related work creation: [ 35.979231] kasan_save_stack+0x22/0x50 [ 35.979576] __kasan_record_aux_stack+0x8e/0xa0 [ 35.979962] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.980399] remove_vma+0x139/0x170 [ 35.980708] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.981084] do_vmi_munmap+0x1f1/0x2b0 [ 35.981414] __vm_munmap+0x138/0x3a0 [ 35.981732] __x64_sys_munmap+0x59/0x80 [ 35.982070] do_syscall_64+0x3f/0x90 [ 35.982396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.982852] [ 35.983002] Second to last potentially related work creation: [ 35.983458] kasan_save_stack+0x22/0x50 [ 35.983820] __kasan_record_aux_stack+0x8e/0xa0 [ 35.984272] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.984702] remove_vma+0x139/0x170 [ 35.985008] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.985383] do_vmi_munmap+0x1f1/0x2b0 [ 35.985712] __vm_munmap+0x138/0x3a0 [ 35.986026] elf_map+0x26f/0x310 [ 35.986332] load_elf_binary+0x3417/0x5030 [ 35.986709] bprm_execve+0x803/0x1940 [ 35.987046] do_execveat_common+0x734/0x8e0 [ 35.987404] __x64_sys_execve+0x93/0xc0 [ 35.987738] do_syscall_64+0x3f/0x90 [ 35.988113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.988564] [ 35.988712] The buggy address belongs to the object at ffff88800f6ba9f8 [ 35.988712] which belongs to the cache vm_area_struct of size 168 [ 35.989701] The buggy address is located 88 bytes inside of [ 35.989701] freed 168-byte region [ffff88800f6ba9f8, ffff88800f6baaa0) [ 35.990672] [ 35.990820] The buggy address belongs to the physical page: [ 35.991259] page:000000007e4713d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf6ba [ 35.991984] memcg:ffff88800984ab01 [ 35.992271] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.992703] page_type: 0xffffffff() [ 35.993006] raw: 0100000000000200 ffff88800879fc80 ffffea00003cb900 dead000000000008 [ 35.993612] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800984ab01 [ 35.994189] page dumped because: kasan: bad access detected [ 35.994638] [ 35.994795] Memory state around the buggy address: [ 35.995172] ffff88800f6ba900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.995732] ffff88800f6ba980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 35.996297] >ffff88800f6baa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.996847] ^ [ 35.997300] ffff88800f6baa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 35.997858] ffff88800f6bab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.998416] ================================================================== [ 36.000608] Disabling lock debugging due to kernel taint [ 38.379211] BUG: Bad rss-counter state mm:00000000bd99dea3 type:MM_FILEPAGES val:33 [ 38.379870] BUG: Bad rss-counter state mm:00000000bd99dea3 type:MM_ANONPAGES val:22 [ 39.023420] BUG: Bad rss-counter state mm:000000008d8df66b type:MM_FILEPAGES val:33 [ 39.024886] BUG: Bad rss-counter state mm:000000008d8df66b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52261' (ECDSA) to the list of known hosts. 2023/06/20 08:16:28 fuzzer started 2023/06/20 08:16:28 dialing manager at localhost:44161 2023/06/20 08:16:28 checking machine... 2023/06/20 08:16:28 checking revisions... [ 39.878647] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:16:28 testing simple program... [ 39.926481] cgroup: Unknown subsys name 'net' [ 39.981825] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:16:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453084b RDX=fffffbfff0adb045 RSI=0000000000000004 RDI=ffffffff856d8220 RBP=ffffffff856d8220 RSP=ffff8880181df1a0 R8 =0000000000000000 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=00000000000b6996 R12=0000000000000003 R13=fffffbfff0adb044 R14=0000000000000001 R15=1ffff1100303be35 RIP=ffffffff845308c8 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 00007f48c5a40900 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=00007f48c59dd008 CR3=000000000e3f6000 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=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 info registers vcpu 1 RAX=ffffffff846000aa RBX=0000000000000001 RCX=ffffffff864b0246 RDX=dffffc0000000000 RSI=ffff888016477f50 RDI=1ffff11002c8eeaa RBP=ffff888016477550 RSP=ffff888016477488 R8 =ffffffff864b024a R9 =ffff888016477538 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888016477558 R13=ffff888016477540 R14=ffff888016477f58 R15=ffff8880164774f8 RIP=ffffffff8113105c 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 00007f060ffaa900 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=00007fa027000cf0 CR3=0000000019d62000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000