syzkaller login: [ 32.808768] BUG: Bad rss-counter state mm:00000000409794d9 type:MM_FILEPAGES val:33 [ 32.810169] BUG: Bad rss-counter state mm:00000000409794d9 type:MM_ANONPAGES val:22 [ 32.986263] ================================================================== [ 32.987273] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.988301] Read of size 8 at addr ffff88800cb8eed8 by task sshd/219 [ 32.989326] [ 32.989577] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.990529] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.991641] Call Trace: [ 32.991989] [ 32.992304] dump_stack_lvl+0x91/0xf0 [ 32.992863] print_report+0xcc/0x620 [ 32.993429] ? __virt_addr_valid+0x102/0x340 [ 32.994062] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.994738] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.995433] kasan_report+0xbe/0xf0 [ 32.995963] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.996669] vma_interval_tree_remove+0xc75/0xec0 [ 32.997372] vma_prepare+0xc54/0x11a0 [ 32.997923] __split_vma+0x5af/0x950 [ 32.998453] ? __pfx___split_vma+0x10/0x10 [ 32.998996] ? find_held_lock+0x2c/0x110 [ 32.999539] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.000113] ? lock_is_held_type+0x9f/0x120 [ 33.000668] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.001335] ? mtree_range_walk+0x632/0x900 [ 33.001914] ? mas_walk+0x5c7/0x7c0 [ 33.002436] do_vmi_munmap+0x1f1/0x2b0 [ 33.002981] mmap_region+0x1f9/0x2660 [ 33.003479] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.003999] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.004739] ? __pfx_lock_acquire+0x10/0x10 [ 33.005313] ? __pfx_mmap_region+0x10/0x10 [ 33.005916] ? security_mmap_addr+0x7d/0xa0 [ 33.006490] ? get_unmapped_area+0x1f5/0x3f0 [ 33.007042] do_mmap+0x854/0xf00 [ 33.007505] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.008010] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.008578] ksys_mmap_pgoff+0x3af/0x500 [ 33.009130] do_syscall_64+0x3f/0x90 [ 33.009634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.010353] RIP: 0033:0x7f9e69b0bd82 [ 33.010818] 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 [ 33.013046] RSP: 002b:00007ffc63c2aa88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.014045] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9e69b0bd82 [ 33.014942] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9e68f45000 [ 33.015813] RBP: 00007f9e68f45000 R08: 0000000000000009 R09: 0000000000001000 [ 33.016691] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636eb32eb20 [ 33.017631] R13: 00007ffc63c2aaa0 R14: 00007ffc63c2aad0 R15: 00007ffc63c2ae30 [ 33.018583] [ 33.018884] [ 33.019101] Allocated by task 212: [ 33.019547] kasan_save_stack+0x22/0x50 [ 33.020060] kasan_set_track+0x25/0x30 [ 33.020563] __kasan_slab_alloc+0x59/0x70 [ 33.021139] kmem_cache_alloc+0x16b/0x370 [ 33.021672] vm_area_dup+0x20/0x160 [ 33.022210] __split_vma+0x170/0x950 [ 33.022678] split_vma+0xc6/0x110 [ 33.023121] mprotect_fixup+0x8d2/0xb30 [ 33.023639] do_mprotect_pkey+0x87e/0xd40 [ 33.024168] __x64_sys_mprotect+0x78/0xc0 [ 33.024689] do_syscall_64+0x3f/0x90 [ 33.025207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.025925] [ 33.026191] Freed by task 212: [ 33.026587] kasan_save_stack+0x22/0x50 [ 33.027094] kasan_set_track+0x25/0x30 [ 33.027603] kasan_save_free_info+0x2b/0x50 [ 33.028137] __kasan_slab_free+0x10a/0x190 [ 33.028678] kmem_cache_free+0x10d/0x4d0 [ 33.029185] rcu_core+0x8c8/0x2860 [ 33.029654] __do_softirq+0x1b7/0x7d4 [ 33.030138] [ 33.030356] Last potentially related work creation: [ 33.030946] kasan_save_stack+0x22/0x50 [ 33.031477] __kasan_record_aux_stack+0x8e/0xa0 [ 33.032052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.032696] remove_vma+0x139/0x170 [ 33.033182] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.033765] do_vmi_munmap+0x1f1/0x2b0 [ 33.034328] __vm_munmap+0x138/0x3a0 [ 33.034804] __x64_sys_munmap+0x59/0x80 [ 33.035318] do_syscall_64+0x3f/0x90 [ 33.035794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.036448] [ 33.036662] Second to last potentially related work creation: [ 33.037427] kasan_save_stack+0x22/0x50 [ 33.037984] __kasan_record_aux_stack+0x8e/0xa0 [ 33.038607] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.039274] remove_vma+0x139/0x170 [ 33.039731] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.040292] do_vmi_munmap+0x1f1/0x2b0 [ 33.040787] mmap_region+0x1f9/0x2660 [ 33.041299] do_mmap+0x854/0xf00 [ 33.041767] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.042324] ksys_mmap_pgoff+0x3af/0x500 [ 33.042833] do_syscall_64+0x3f/0x90 [ 33.043322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.043962] [ 33.044176] The buggy address belongs to the object at ffff88800cb8ee80 [ 33.044176] which belongs to the cache vm_area_struct of size 168 [ 33.045666] The buggy address is located 88 bytes inside of [ 33.045666] freed 168-byte region [ffff88800cb8ee80, ffff88800cb8ef28) [ 33.047071] [ 33.047295] The buggy address belongs to the physical page: [ 33.047950] page:00000000c8ec7ff9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb8e [ 33.049040] memcg:ffff888013efd001 [ 33.049490] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.050197] page_type: 0xffffffff() [ 33.050651] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 33.051577] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013efd001 [ 33.052482] page dumped because: kasan: bad access detected [ 33.053186] [ 33.053433] Memory state around the buggy address: [ 33.054071] ffff88800cb8ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.054957] ffff88800cb8ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.055851] >ffff88800cb8ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.056727] ^ [ 33.057499] ffff88800cb8ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 33.058371] ffff88800cb8ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.059260] ================================================================== [ 33.060495] Disabling lock debugging due to kernel taint [ 35.108613] BUG: Bad rss-counter state mm:000000003161cb61 type:MM_FILEPAGES val:33 [ 35.110064] BUG: Bad rss-counter state mm:000000003161cb61 type:MM_ANONPAGES val:22 [ 35.539893] BUG: Bad rss-counter state mm:000000003eab23b6 type:MM_FILEPAGES val:33 [ 35.540959] BUG: Bad rss-counter state mm:000000003eab23b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58995' (ECDSA) to the list of known hosts. 2023/06/19 23:15:21 fuzzer started 2023/06/19 23:15:21 dialing manager at localhost:44161 2023/06/19 23:15:21 checking machine... 2023/06/19 23:15:21 checking revisions... [ 36.311846] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:15:21 testing simple program... [ 36.361259] cgroup: Unknown subsys name 'net' [ 36.403364] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:15:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00005573c1b58de0 RCX=0000000000000000 RDX=0000000000000000 RSI=00007f62d8000ba4 RDI=000000000000004a RBP=00005573c37f31c0 RSP=00007f62dcc1c660 R8 =0000000000000075 R9 =00007f62dcc1c7e0 R10=00007f62dcc1c788 R11=00007f62dcc1c76c R12=00007f62dcc1c7e0 R13=0000000000001fa0 R14=00007f62d8000ba0 R15=00007f62dcc1c788 RIP=00005573c1b19857 RFL=00000203 [------C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f62dcc20700 00000000 00000000 GS =0000 0000000000000000 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=000055e070e31290 CR3=000000000f18a000 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=35313a3332203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732031323a3531 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363930 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000ffffff00 RBX=000055ee3ec20860 RCX=00007ffd0a8dc050 RDX=00007ffd0a8dc301 RSI=000055ee3ebe5dc0 RDI=00000000ffffffff RBP=00007ffd0a8dc230 RSP=00007ffd0a8dc050 R8 =00000000ffffffff R9 =0066666666666666 R10=00007ffd0a8dbe97 R11=0000000000000000 R12=00007ffd0a8dc2c0 R13=00007ffd0a8dcaa0 R14=000000000000001f R15=00007ffd0a8dc820 RIP=000055ee3de4ff15 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f84e5540900 00000000 00000000 GS =0000 0000000000000000 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=00007f6906110650 CR3=000000000cb5e000 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=00000000000000000000000000000000 XMM02=766972705b20746f6f72203a64687373 XMM03=005d766972705b20746f6f72203a6468 XMM04=b165934222e8e51600000000000ae988 XMM05=16e54fcab9c553a70000000000136550 XMM06=dfcdbad4f1609c3700000000001353e8 XMM07=00000000000000000000000000000000 XMM08=3d454e494c444d435f5443454a424f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000