syzkaller login: [ 32.837026] BUG: Bad rss-counter state mm:0000000097e01cfd type:MM_FILEPAGES val:33 [ 32.838106] BUG: Bad rss-counter state mm:0000000097e01cfd type:MM_ANONPAGES val:22 [ 32.998435] ================================================================== [ 32.999349] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.000306] Read of size 8 at addr ffff888016abcd08 by task sshd/220 [ 33.001094] [ 33.001312] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.002297] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.003273] Call Trace: [ 33.003590] [ 33.003878] dump_stack_lvl+0x91/0xf0 [ 33.004370] print_report+0xcc/0x620 [ 33.004853] ? __virt_addr_valid+0x102/0x340 [ 33.005420] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.006059] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.006699] kasan_report+0xbe/0xf0 [ 33.007173] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.007797] vma_interval_tree_remove+0xc75/0xec0 [ 33.008404] vma_prepare+0xc54/0x11a0 [ 33.008887] __split_vma+0x5af/0x950 [ 33.009360] ? __pfx___split_vma+0x10/0x10 [ 33.009891] ? find_held_lock+0x2c/0x110 [ 33.010423] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.010990] ? lock_is_held_type+0x9f/0x120 [ 33.011530] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.012139] ? mtree_range_walk+0x632/0x900 [ 33.012693] ? mas_walk+0x5c7/0x7c0 [ 33.013176] do_vmi_munmap+0x1f1/0x2b0 [ 33.013671] mmap_region+0x1f9/0x2660 [ 33.014158] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.014700] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.015415] ? __pfx_lock_acquire+0x10/0x10 [ 33.015962] ? __pfx_mmap_region+0x10/0x10 [ 33.016497] ? security_mmap_addr+0x7d/0xa0 [ 33.017024] ? get_unmapped_area+0x1f5/0x3f0 [ 33.017576] do_mmap+0x854/0xf00 [ 33.018016] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.018523] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.019102] ksys_mmap_pgoff+0x3af/0x500 [ 33.019612] do_syscall_64+0x3f/0x90 [ 33.020096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.020755] RIP: 0033:0x7febc0414d82 [ 33.021213] 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 [ 33.023342] RSP: 002b:00007ffe146a9b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.024246] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007febc0414d82 [ 33.025097] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007febbf84e000 [ 33.025961] RBP: 00007febbf84e000 R08: 0000000000000009 R09: 0000000000001000 [ 33.026844] R10: 0000000000000812 R11: 0000000000000206 R12: 00005614abfaeec0 [ 33.027713] R13: 00007ffe146a9b40 R14: 00007ffe146a9b70 R15: 00007ffe146a9ed0 [ 33.028588] [ 33.028883] [ 33.029108] Allocated by task 213: [ 33.029545] kasan_save_stack+0x22/0x50 [ 33.030069] kasan_set_track+0x25/0x30 [ 33.030568] __kasan_slab_alloc+0x59/0x70 [ 33.031103] kmem_cache_alloc+0x16b/0x370 [ 33.031625] vm_area_dup+0x20/0x160 [ 33.032093] __split_vma+0x170/0x950 [ 33.032562] split_vma+0xc6/0x110 [ 33.033006] mprotect_fixup+0x8d2/0xb30 [ 33.033506] do_mprotect_pkey+0x87e/0xd40 [ 33.034028] __x64_sys_mprotect+0x78/0xc0 [ 33.034557] do_syscall_64+0x3f/0x90 [ 33.035034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.035674] [ 33.035893] Freed by task 213: [ 33.036281] kasan_save_stack+0x22/0x50 [ 33.036794] kasan_set_track+0x25/0x30 [ 33.037295] kasan_save_free_info+0x2b/0x50 [ 33.037834] __kasan_slab_free+0x10a/0x190 [ 33.038392] kmem_cache_free+0x10d/0x4d0 [ 33.038902] rcu_core+0x8c8/0x2860 [ 33.039355] __do_softirq+0x1b7/0x7d4 [ 33.039838] [ 33.040057] Last potentially related work creation: [ 33.040637] kasan_save_stack+0x22/0x50 [ 33.041142] __kasan_record_aux_stack+0x8e/0xa0 [ 33.041715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.042370] remove_vma+0x139/0x170 [ 33.042816] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.043382] do_vmi_munmap+0x1f1/0x2b0 [ 33.043873] __vm_munmap+0x138/0x3a0 [ 33.044343] __x64_sys_munmap+0x59/0x80 [ 33.044837] do_syscall_64+0x3f/0x90 [ 33.045314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.045964] [ 33.046195] The buggy address belongs to the object at ffff888016abccb0 [ 33.046195] which belongs to the cache vm_area_struct of size 168 [ 33.047665] The buggy address is located 88 bytes inside of [ 33.047665] freed 168-byte region [ffff888016abccb0, ffff888016abcd58) [ 33.049065] [ 33.049283] The buggy address belongs to the physical page: [ 33.049938] page:00000000908db93c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16abc [ 33.051052] memcg:ffff88800ed40701 [ 33.051478] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.052120] page_type: 0xffffffff() [ 33.052580] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.053510] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed40701 [ 33.054449] page dumped because: kasan: bad access detected [ 33.055121] [ 33.055338] Memory state around the buggy address: [ 33.055922] ffff888016abcc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 33.056776] ffff888016abcc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.057632] >ffff888016abcd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.058492] ^ [ 33.058941] ffff888016abcd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.059796] ffff888016abce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.060668] ================================================================== [ 33.061638] Disabling lock debugging due to kernel taint [ 34.933637] BUG: Bad rss-counter state mm:0000000052d4e3a8 type:MM_FILEPAGES val:33 [ 34.935172] BUG: Bad rss-counter state mm:0000000052d4e3a8 type:MM_ANONPAGES val:22 [ 35.412262] BUG: Bad rss-counter state mm:0000000093aa4603 type:MM_FILEPAGES val:33 [ 35.413244] BUG: Bad rss-counter state mm:0000000093aa4603 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22598' (ECDSA) to the list of known hosts. 2023/06/19 20:57:56 fuzzer started 2023/06/19 20:57:57 dialing manager at localhost:44161 2023/06/19 20:57:57 checking machine... 2023/06/19 20:57:57 checking revisions... [ 36.134792] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:57:57 testing simple program... [ 36.177208] cgroup: Unknown subsys name 'net' [ 36.239404] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:57:55 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff856528e0 RCX=ffffffff814c8421 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880168a79c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f35500eb477 R13=0000000000000000 R14=ffff888016451b40 R15=ffff88800e33dbe0 RIP=ffffffff814c01d0 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 00007f354fbf8900 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=00007f35501b00b0 CR3=000000000d9fc000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffef8842dd8 CR3=000000000fe94000 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=2036353a37353a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a37353a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000