syzkaller login: [ 33.796669] BUG: Bad rss-counter state mm:00000000dcb62418 type:MM_FILEPAGES val:33 [ 33.797932] BUG: Bad rss-counter state mm:00000000dcb62418 type:MM_ANONPAGES val:22 [ 33.983736] ================================================================== [ 33.984823] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.986035] Read of size 8 at addr ffff88801bc04228 by task sshd/222 [ 33.986944] [ 33.987166] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.988038] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.989013] Call Trace: [ 33.989332] [ 33.989622] dump_stack_lvl+0x91/0xf0 [ 33.990151] print_report+0xcc/0x620 [ 33.990637] ? __virt_addr_valid+0x102/0x340 [ 33.991186] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.991796] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.992407] kasan_report+0xbe/0xf0 [ 33.992877] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.993492] vma_interval_tree_remove+0xc75/0xec0 [ 33.994122] vma_prepare+0xc54/0x11a0 [ 33.994714] __split_vma+0x5af/0x950 [ 33.995293] ? __pfx___split_vma+0x10/0x10 [ 33.995942] ? find_held_lock+0x2c/0x110 [ 33.996584] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.997279] ? lock_is_held_type+0x9f/0x120 [ 33.997972] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.998595] ? mtree_range_walk+0x632/0x900 [ 33.999147] ? mas_walk+0x5c7/0x7c0 [ 33.999615] do_vmi_munmap+0x1f1/0x2b0 [ 34.000105] mmap_region+0x1f9/0x2660 [ 34.000593] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.001105] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.001824] ? __pfx_lock_acquire+0x10/0x10 [ 34.002351] ? __pfx_mmap_region+0x10/0x10 [ 34.002880] ? security_mmap_addr+0x7d/0xa0 [ 34.003406] ? get_unmapped_area+0x1f5/0x3f0 [ 34.003948] do_mmap+0x854/0xf00 [ 34.004385] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.004881] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.005438] ksys_mmap_pgoff+0x3af/0x500 [ 34.005961] do_syscall_64+0x3f/0x90 [ 34.006433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.007076] RIP: 0033:0x7f7a01146d82 [ 34.007530] 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 [ 34.009645] RSP: 002b:00007ffe7075d518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.010566] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7a01146d82 [ 34.011404] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7a00580000 [ 34.012249] RBP: 00007f7a00580000 R08: 0000000000000009 R09: 0000000000001000 [ 34.013091] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558b1fb5cec0 [ 34.013939] R13: 00007ffe7075d530 R14: 00007ffe7075d560 R15: 00007ffe7075d8c0 [ 34.014792] [ 34.015080] [ 34.015295] Allocated by task 214: [ 34.015719] kasan_save_stack+0x22/0x50 [ 34.016225] kasan_set_track+0x25/0x30 [ 34.016711] __kasan_slab_alloc+0x59/0x70 [ 34.017236] kmem_cache_alloc+0x16b/0x370 [ 34.017768] vm_area_dup+0x20/0x160 [ 34.018217] __split_vma+0x170/0x950 [ 34.018679] split_vma+0xc6/0x110 [ 34.019115] mprotect_fixup+0x8d2/0xb30 [ 34.019613] do_mprotect_pkey+0x87e/0xd40 [ 34.020128] __x64_sys_mprotect+0x78/0xc0 [ 34.020647] do_syscall_64+0x3f/0x90 [ 34.021118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.021756] [ 34.021974] Freed by task 214: [ 34.022362] kasan_save_stack+0x22/0x50 [ 34.022862] kasan_set_track+0x25/0x30 [ 34.023354] kasan_save_free_info+0x2b/0x50 [ 34.023883] __kasan_slab_free+0x10a/0x190 [ 34.024417] kmem_cache_free+0x10d/0x4d0 [ 34.024924] rcu_core+0x8c8/0x2860 [ 34.025364] __do_softirq+0x1b7/0x7d4 [ 34.025843] [ 34.026055] Last potentially related work creation: [ 34.026631] kasan_save_stack+0x22/0x50 [ 34.027133] __kasan_record_aux_stack+0x8e/0xa0 [ 34.027699] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.028375] remove_vma+0x139/0x170 [ 34.028825] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.029376] do_vmi_munmap+0x1f1/0x2b0 [ 34.029863] __vm_munmap+0x138/0x3a0 [ 34.030332] __x64_sys_munmap+0x59/0x80 [ 34.030819] do_syscall_64+0x3f/0x90 [ 34.031290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.031936] [ 34.032152] The buggy address belongs to the object at ffff88801bc041d0 [ 34.032152] which belongs to the cache vm_area_struct of size 168 [ 34.033601] The buggy address is located 88 bytes inside of [ 34.033601] freed 168-byte region [ffff88801bc041d0, ffff88801bc04278) [ 34.034996] [ 34.035216] The buggy address belongs to the physical page: [ 34.035872] page:00000000e080943f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc04 [ 34.036954] memcg:ffff88800f06e501 [ 34.037382] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.038033] page_type: 0xffffffff() [ 34.038506] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.039477] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f06e501 [ 34.040428] page dumped because: kasan: bad access detected [ 34.041126] [ 34.041355] Memory state around the buggy address: [ 34.041980] ffff88801bc04100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.042879] ffff88801bc04180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 34.043794] >ffff88801bc04200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.044684] ^ [ 34.045265] ffff88801bc04280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.046185] ffff88801bc04300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.047068] ================================================================== [ 34.048030] Disabling lock debugging due to kernel taint [ 36.268853] BUG: Bad rss-counter state mm:00000000e90b1db5 type:MM_FILEPAGES val:33 [ 36.269900] BUG: Bad rss-counter state mm:00000000e90b1db5 type:MM_ANONPAGES val:22 [ 36.667868] BUG: Bad rss-counter state mm:00000000026d052b type:MM_FILEPAGES val:33 [ 36.668851] BUG: Bad rss-counter state mm:00000000026d052b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30658' (ECDSA) to the list of known hosts. 2023/06/20 01:59:03 fuzzer started 2023/06/20 01:59:03 dialing manager at localhost:44161 2023/06/20 01:59:03 checking machine... 2023/06/20 01:59:03 checking revisions... [ 37.212828] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:59:03 testing simple program... [ 37.251248] cgroup: Unknown subsys name 'net' [ 37.285186] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:58:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800da68000 RCX=ffffffff81105bd3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800da6802c RBP=ffff88800cc7f7c8 RSP=ffff88806ce09f80 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84531c53 RFL=00000017 [----APC] 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 00007f440e7f6700 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=00007fea834ef080 CR3=000000000e6d6000 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=39353a3130203032206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34313434342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343134 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=0000000000000000 RBX=ffff88806cf3a2c0 RCX=ffffffff81377add RDX=1ffff1100141b07f RSI=0000000000000008 RDI=ffff88806cf3a2c0 RBP=ffff88806cf3a2c0 RSP=ffff88806cf09e30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff85616740 R13=ffff88806cf35000 R14=0000000000000200 R15=ffff88806cf3a2d2 RIP=ffffffff8136aa3c 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 00007f1070cdb900 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=00007f10710a7328 CR3=000000000f20a000 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=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