syzkaller login: [ 31.377217] BUG: Bad rss-counter state mm:00000000cb3790f1 type:MM_FILEPAGES val:33 [ 31.377946] BUG: Bad rss-counter state mm:00000000cb3790f1 type:MM_ANONPAGES val:22 [ 31.407222] ================================================================== [ 31.407948] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.408626] Read of size 8 at addr ffff88800eba6c20 by task sshd/219 [ 31.409159] [ 31.409313] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.409897] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.410620] Call Trace: [ 31.411067] [ 31.411264] dump_stack_lvl+0x91/0xf0 [ 31.411606] print_report+0xcc/0x620 [ 31.411927] ? __virt_addr_valid+0x102/0x340 [ 31.412309] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.412742] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.413187] kasan_report+0xbe/0xf0 [ 31.413515] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.413923] vma_interval_tree_remove+0xc75/0xec0 [ 31.414339] vma_prepare+0xc54/0x11a0 [ 31.414677] __split_vma+0x5af/0x950 [ 31.415053] ? __pfx___split_vma+0x10/0x10 [ 31.415414] ? find_held_lock+0x2c/0x110 [ 31.415778] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.416177] ? lock_is_held_type+0x9f/0x120 [ 31.416554] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.416983] ? mtree_range_walk+0x632/0x900 [ 31.417370] ? mas_walk+0x5c7/0x7c0 [ 31.417699] do_vmi_munmap+0x1f1/0x2b0 [ 31.418040] mmap_region+0x1f9/0x2660 [ 31.418375] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.418719] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.419225] ? __pfx_lock_acquire+0x10/0x10 [ 31.419570] ? __pfx_mmap_region+0x10/0x10 [ 31.419929] ? security_mmap_addr+0x7d/0xa0 [ 31.420293] ? get_unmapped_area+0x1f5/0x3f0 [ 31.420672] do_mmap+0x854/0xf00 [ 31.420983] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.421315] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.421698] ksys_mmap_pgoff+0x3af/0x500 [ 31.422060] do_syscall_64+0x3f/0x90 [ 31.422396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.422845] RIP: 0033:0x7fa01299fd82 [ 31.423192] 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 [ 31.424641] RSP: 002b:00007ffe6e429098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.425257] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa01299fd82 [ 31.425836] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa011dd9000 [ 31.426426] RBP: 00007fa011dd9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.427026] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ddc1e2f70 [ 31.427592] R13: 00007ffe6e4290b0 R14: 00007ffe6e4290e0 R15: 00007ffe6e429440 [ 31.428166] [ 31.428373] [ 31.428523] Allocated by task 212: [ 31.428812] kasan_save_stack+0x22/0x50 [ 31.429158] kasan_set_track+0x25/0x30 [ 31.429473] __kasan_slab_alloc+0x59/0x70 [ 31.429807] kmem_cache_alloc+0x16b/0x370 [ 31.430151] vm_area_dup+0x20/0x160 [ 31.430444] __split_vma+0x170/0x950 [ 31.430746] split_vma+0xc6/0x110 [ 31.431058] mprotect_fixup+0x8d2/0xb30 [ 31.431387] do_mprotect_pkey+0x87e/0xd40 [ 31.431719] __x64_sys_mprotect+0x78/0xc0 [ 31.432050] do_syscall_64+0x3f/0x90 [ 31.432356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.432777] [ 31.432925] Freed by task 19: [ 31.433181] kasan_save_stack+0x22/0x50 [ 31.433533] kasan_set_track+0x25/0x30 [ 31.433872] kasan_save_free_info+0x2b/0x50 [ 31.434233] __kasan_slab_free+0x10a/0x190 [ 31.434597] kmem_cache_free+0x10d/0x4d0 [ 31.434968] rcu_core+0x8c8/0x2860 [ 31.435257] __do_softirq+0x1b7/0x7d4 [ 31.435574] [ 31.435720] Last potentially related work creation: [ 31.436120] kasan_save_stack+0x22/0x50 [ 31.436451] __kasan_record_aux_stack+0x8e/0xa0 [ 31.436836] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.437273] remove_vma+0x139/0x170 [ 31.437592] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.437993] do_vmi_munmap+0x1f1/0x2b0 [ 31.438321] __vm_munmap+0x138/0x3a0 [ 31.438649] __x64_sys_munmap+0x59/0x80 [ 31.439039] do_syscall_64+0x3f/0x90 [ 31.439388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.439821] [ 31.439971] The buggy address belongs to the object at ffff88800eba6bc8 [ 31.439971] which belongs to the cache vm_area_struct of size 168 [ 31.440971] The buggy address is located 88 bytes inside of [ 31.440971] freed 168-byte region [ffff88800eba6bc8, ffff88800eba6c70) [ 31.441954] [ 31.442106] The buggy address belongs to the physical page: [ 31.442561] page:00000000234d6751 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeba6 [ 31.443334] memcg:ffff88801a089501 [ 31.443633] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.444074] page_type: 0xffffffff() [ 31.444382] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.445009] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a089501 [ 31.445621] page dumped because: kasan: bad access detected [ 31.446089] [ 31.446240] Memory state around the buggy address: [ 31.446642] ffff88800eba6b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.447293] ffff88800eba6b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.447896] >ffff88800eba6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.448496] ^ [ 31.448868] ffff88800eba6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.449473] ffff88800eba6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.450076] ================================================================== [ 31.450943] Disabling lock debugging due to kernel taint [ 33.401620] BUG: Bad rss-counter state mm:0000000068c7ff7b type:MM_FILEPAGES val:33 [ 33.402331] BUG: Bad rss-counter state mm:0000000068c7ff7b type:MM_ANONPAGES val:22 [ 33.770142] BUG: Bad rss-counter state mm:00000000458a9163 type:MM_FILEPAGES val:33 [ 33.770835] BUG: Bad rss-counter state mm:00000000458a9163 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52097' (ECDSA) to the list of known hosts. 2023/06/20 08:30:06 fuzzer started 2023/06/20 08:30:06 dialing manager at localhost:44161 2023/06/20 08:30:06 checking machine... 2023/06/20 08:30:06 checking revisions... [ 34.346444] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:30:06 testing simple program... [ 34.388727] cgroup: Unknown subsys name 'net' [ 34.439299] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:30:05 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff888008d7fed0 RSI=ffff888008d7fe98 RDI=ffff888008d7f988 RBP=ffff888008d78000 RSP=ffff888008d7f948 R8 =0000000000000001 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7fe98 R15=ffff888008d7f978 RIP=ffffffff81130930 RFL=00000292 [--S-A--] 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=00007f20410b7008 CR3=000000000d618000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c4b3148b4eb4c96000000000000ae988 XMM05=2b36630fb3d420eb0000000000134ca8 XMM06=19e9129bd510f2350000000000133b40 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110011caf31 RSI=ffffffff8118d7d9 RDI=ffff888008e579f8 RBP=ffff888008e579c8 RSP=ffff888008e57920 R8 =0000000000000001 R9 =ffff888008e57970 R10=0000000000038001 R11=00000000000b5c92 R12=ffff888008e579f8 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff88800da9bc80 RIP=ffffffff813ad42f RFL=00000282 [--S----] 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 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=00007ffc7b0a4000 CR3=00000000168b0000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000