syzkaller login: [ 68.787413] BUG: Bad rss-counter state mm:000000006fb8d7a4 type:MM_FILEPAGES val:33 [ 68.788967] BUG: Bad rss-counter state mm:000000006fb8d7a4 type:MM_ANONPAGES val:22 [ 68.982082] ================================================================== [ 68.983002] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.983947] Read of size 8 at addr ffff888010300880 by task sshd/228 [ 68.984738] [ 68.985055] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.985916] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.986893] Call Trace: [ 68.987229] [ 68.987516] dump_stack_lvl+0x91/0xf0 [ 68.988005] print_report+0xcc/0x620 [ 68.988492] ? __virt_addr_valid+0x102/0x340 [ 68.989067] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.989682] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.990305] kasan_report+0xbe/0xf0 [ 68.990787] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.991418] vma_interval_tree_remove+0xc75/0xec0 [ 68.992023] vma_prepare+0xc54/0x11a0 [ 68.992505] __split_vma+0x5af/0x950 [ 68.992997] ? __pfx___split_vma+0x10/0x10 [ 68.993546] ? find_held_lock+0x2c/0x110 [ 68.994075] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.994645] ? lock_is_held_type+0x9f/0x120 [ 68.995193] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.995811] ? mtree_range_walk+0x632/0x900 [ 68.996373] ? mas_walk+0x5c7/0x7c0 [ 68.996865] do_vmi_munmap+0x1f1/0x2b0 [ 68.997371] mmap_region+0x1f9/0x2660 [ 68.997869] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.998382] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.999102] ? __pfx_lock_acquire+0x10/0x10 [ 68.999647] ? __pfx_mmap_region+0x10/0x10 [ 69.000204] ? security_mmap_addr+0x7d/0xa0 [ 69.000753] ? get_unmapped_area+0x1f5/0x3f0 [ 69.001314] do_mmap+0x854/0xf00 [ 69.001754] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.002259] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.002839] ksys_mmap_pgoff+0x3af/0x500 [ 69.003357] do_syscall_64+0x3f/0x90 [ 69.003854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.004512] RIP: 0033:0x7f1e409aed82 [ 69.004977] 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 [ 69.007101] RSP: 002b:00007ffceaa1c2f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.008016] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e409aed82 [ 69.008881] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e3fde8000 [ 69.009728] RBP: 00007f1e3fde8000 R08: 0000000000000009 R09: 0000000000001000 [ 69.010580] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df659cbec0 [ 69.011426] R13: 00007ffceaa1c310 R14: 00007ffceaa1c340 R15: 00007ffceaa1c6a0 [ 69.012294] [ 69.012599] [ 69.012820] Allocated by task 220: [ 69.013263] kasan_save_stack+0x22/0x50 [ 69.013768] kasan_set_track+0x25/0x30 [ 69.014268] __kasan_slab_alloc+0x59/0x70 [ 69.014798] kmem_cache_alloc+0x16b/0x370 [ 69.015311] vm_area_dup+0x20/0x160 [ 69.015765] __split_vma+0x170/0x950 [ 69.016232] split_vma+0xc6/0x110 [ 69.016703] mprotect_fixup+0x8d2/0xb30 [ 69.017204] do_mprotect_pkey+0x87e/0xd40 [ 69.017731] __x64_sys_mprotect+0x78/0xc0 [ 69.018259] do_syscall_64+0x3f/0x90 [ 69.018733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.019391] [ 69.019610] Freed by task 220: [ 69.020004] kasan_save_stack+0x22/0x50 [ 69.020511] kasan_set_track+0x25/0x30 [ 69.021015] kasan_save_free_info+0x2b/0x50 [ 69.021551] __kasan_slab_free+0x10a/0x190 [ 69.022093] kmem_cache_free+0x10d/0x4d0 [ 69.022611] rcu_core+0x8c8/0x2860 [ 69.023066] __do_softirq+0x1b7/0x7d4 [ 69.023549] [ 69.023768] Last potentially related work creation: [ 69.024365] kasan_save_stack+0x22/0x50 [ 69.024883] __kasan_record_aux_stack+0x8e/0xa0 [ 69.025471] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.026115] remove_vma+0x139/0x170 [ 69.026571] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.027145] do_vmi_munmap+0x1f1/0x2b0 [ 69.027634] __vm_munmap+0x138/0x3a0 [ 69.028106] __x64_sys_munmap+0x59/0x80 [ 69.028620] do_syscall_64+0x3f/0x90 [ 69.029098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.029766] [ 69.029984] The buggy address belongs to the object at ffff888010300828 [ 69.029984] which belongs to the cache vm_area_struct of size 168 [ 69.031455] The buggy address is located 88 bytes inside of [ 69.031455] freed 168-byte region [ffff888010300828, ffff8880103008d0) [ 69.032878] [ 69.033098] The buggy address belongs to the physical page: [ 69.033780] page:00000000eda8ec20 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10300 [ 69.034904] memcg:ffff8880102a4d01 [ 69.035332] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.035974] page_type: 0xffffffff() [ 69.036429] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 69.037362] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880102a4d01 [ 69.038280] page dumped because: kasan: bad access detected [ 69.038948] [ 69.039170] Memory state around the buggy address: [ 69.039762] ffff888010300780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 69.040640] ffff888010300800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 69.041512] >ffff888010300880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 69.042376] ^ [ 69.042796] ffff888010300900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.043664] ffff888010300980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 69.044518] ================================================================== [ 69.045544] Disabling lock debugging due to kernel taint [ 70.602283] BUG: Bad rss-counter state mm:000000004a6036e0 type:MM_FILEPAGES val:33 [ 70.602791] BUG: Bad rss-counter state mm:000000004a6036e0 type:MM_ANONPAGES val:22 [ 70.983662] BUG: Bad rss-counter state mm:000000008ecbc2ff type:MM_FILEPAGES val:33 [ 70.984761] BUG: Bad rss-counter state mm:000000008ecbc2ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16681' (ECDSA) to the list of known hosts. 2023/06/21 08:01:14 fuzzer started 2023/06/21 08:01:14 dialing manager at localhost:36067 2023/06/21 08:01:15 checking machine... 2023/06/21 08:01:15 checking revisions... [ 71.731203] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:01:15 testing simple program... [ 71.788742] cgroup: Unknown subsys name 'net' [ 71.831222] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:01:14 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000001255 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff888015c67e68 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=00007fd2a4f800b0 R14=ffff88800c4f9668 R15=0000000000000040 RIP=ffffffff84511dca 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd2a49c8900 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=00007fd2a4f800b0 CR3=000000000fff0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019600c98 RCX=0000000000000000 RDX=1ffff110032c019a RSI=ffffffff81f18c52 RDI=ffff888019600c98 RBP=ffff888019600cd0 RSP=ffff888019d2fca0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=ffff88800dd0aea0 R13=ffff88801457a690 R14=0000000000000001 R15=ffff888019600c98 RIP=ffffffff81f18c67 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 00007f88488f6700 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=00007f761c23b018 CR3=000000000ffc0000 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=2034313a31303a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a31303a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000