syzkaller login: [ 60.991618] BUG: Bad rss-counter state mm:000000003bcf0892 type:MM_FILEPAGES val:33 [ 60.992839] BUG: Bad rss-counter state mm:000000003bcf0892 type:MM_ANONPAGES val:22 [ 61.035480] ================================================================== [ 61.036795] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.038121] Read of size 8 at addr ffff88800e662310 by task sshd/220 [ 61.039125] [ 61.039347] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.040325] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.041337] Call Trace: [ 61.041667] [ 61.042007] dump_stack_lvl+0x91/0xf0 [ 61.042499] print_report+0xcc/0x620 [ 61.042961] ? __virt_addr_valid+0x102/0x340 [ 61.043485] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.044066] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.044654] kasan_report+0xbe/0xf0 [ 61.045106] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.045724] vma_interval_tree_remove+0xc75/0xec0 [ 61.046320] vma_prepare+0xc54/0x11a0 [ 61.046805] __split_vma+0x5af/0x950 [ 61.047275] ? __pfx___split_vma+0x10/0x10 [ 61.047868] ? find_held_lock+0x2c/0x110 [ 61.048518] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.049184] ? lock_is_held_type+0x9f/0x120 [ 61.049787] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.050367] ? mtree_range_walk+0x632/0x900 [ 61.050893] ? mas_walk+0x5c7/0x7c0 [ 61.051346] do_vmi_munmap+0x1f1/0x2b0 [ 61.051812] mmap_region+0x1f9/0x2660 [ 61.052299] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.052864] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.053641] ? __pfx_lock_acquire+0x10/0x10 [ 61.054234] ? __pfx_mmap_region+0x10/0x10 [ 61.054768] ? security_mmap_addr+0x7d/0xa0 [ 61.055299] ? get_unmapped_area+0x1f5/0x3f0 [ 61.055848] do_mmap+0x854/0xf00 [ 61.056297] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.056790] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.057349] ksys_mmap_pgoff+0x3af/0x500 [ 61.057849] do_syscall_64+0x3f/0x90 [ 61.058332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.058980] RIP: 0033:0x7fc9ee47fd82 [ 61.059430] 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 [ 61.061621] RSP: 002b:00007ffd8b1484d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.062466] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc9ee47fd82 [ 61.063265] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc9ed8b9000 [ 61.064063] RBP: 00007fc9ed8b9000 R08: 0000000000000009 R09: 0000000000001000 [ 61.064873] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560cab36cec0 [ 61.065704] R13: 00007ffd8b1484f0 R14: 00007ffd8b148520 R15: 00007ffd8b148880 [ 61.066558] [ 61.066842] [ 61.067099] Allocated by task 213: [ 61.067602] kasan_save_stack+0x22/0x50 [ 61.068102] kasan_set_track+0x25/0x30 [ 61.068642] __kasan_slab_alloc+0x59/0x70 [ 61.069164] kmem_cache_alloc+0x16b/0x370 [ 61.069684] vm_area_dup+0x20/0x160 [ 61.070143] __split_vma+0x170/0x950 [ 61.070603] split_vma+0xc6/0x110 [ 61.071034] mprotect_fixup+0x8d2/0xb30 [ 61.071540] do_mprotect_pkey+0x87e/0xd40 [ 61.072052] __x64_sys_mprotect+0x78/0xc0 [ 61.072586] do_syscall_64+0x3f/0x90 [ 61.073062] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.073709] [ 61.073928] Freed by task 213: [ 61.074312] kasan_save_stack+0x22/0x50 [ 61.074800] kasan_set_track+0x25/0x30 [ 61.075322] kasan_save_free_info+0x2b/0x50 [ 61.075938] __kasan_slab_free+0x10a/0x190 [ 61.076484] kmem_cache_free+0x10d/0x4d0 [ 61.076997] rcu_core+0x8c8/0x2860 [ 61.077449] __do_softirq+0x1b7/0x7d4 [ 61.077922] [ 61.078138] Last potentially related work creation: [ 61.078772] kasan_save_stack+0x22/0x50 [ 61.079277] __kasan_record_aux_stack+0x8e/0xa0 [ 61.079900] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.080565] remove_vma+0x139/0x170 [ 61.081013] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.081578] do_vmi_munmap+0x1f1/0x2b0 [ 61.082056] __vm_munmap+0x138/0x3a0 [ 61.082519] __x64_sys_munmap+0x59/0x80 [ 61.083017] do_syscall_64+0x3f/0x90 [ 61.083497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.084134] [ 61.084361] The buggy address belongs to the object at ffff88800e6622b8 [ 61.084361] which belongs to the cache vm_area_struct of size 168 [ 61.085819] The buggy address is located 88 bytes inside of [ 61.085819] freed 168-byte region [ffff88800e6622b8, ffff88800e662360) [ 61.087254] [ 61.087474] The buggy address belongs to the physical page: [ 61.088170] page:000000005163f2a3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe662 [ 61.089281] memcg:ffff88800e07dc01 [ 61.089715] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.090383] page_type: 0xffffffff() [ 61.090842] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 61.091783] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e07dc01 [ 61.092707] page dumped because: kasan: bad access detected [ 61.093346] [ 61.093549] Memory state around the buggy address: [ 61.094096] ffff88800e662200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 61.094896] ffff88800e662280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 61.095704] >ffff88800e662300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 61.096501] ^ [ 61.096944] ffff88800e662380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 61.097763] ffff88800e662400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 61.098584] ================================================================== [ 61.099561] Disabling lock debugging due to kernel taint [ 63.520450] BUG: Bad rss-counter state mm:000000002e37d1d8 type:MM_FILEPAGES val:33 [ 63.521727] BUG: Bad rss-counter state mm:000000002e37d1d8 type:MM_ANONPAGES val:22 [ 63.995329] BUG: Bad rss-counter state mm:00000000ba226eac type:MM_FILEPAGES val:33 [ 63.996356] BUG: Bad rss-counter state mm:00000000ba226eac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14934' (ECDSA) to the list of known hosts. 2023/06/20 23:21:23 fuzzer started 2023/06/20 23:21:23 dialing manager at localhost:36067 2023/06/20 23:21:23 checking machine... 2023/06/20 23:21:23 checking revisions... [ 64.702192] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:21:24 testing simple program... [ 64.752467] cgroup: Unknown subsys name 'net' [ 64.815439] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:21:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fb5fc8ff858 RCX=ffffffff8369d141 RDX=ffff888015d81b40 RSI=0000000000000008 RDI=0000000000000007 RBP=ffff888019d378d8 RSP=ffff888019d377b8 R8 =0000000000000007 R9 =0000000000000007 R10=0000000000000010 R11=322e322e302e3031 R12=ffff888019d37e60 R13=0000000000000008 R14=dffffc0000000000 R15=00007fb5fc8ff860 RIP=ffffffff814c0438 RFL=00040293 [--S-A-C] 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 00007fb5fc903700 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=00007efcb728aa90 CR3=0000000016b34000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363831 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=0000000000000001 RBX=ffffffff813fc540 RCX=ffffffff813c03f6 RDX=ffff88800e923680 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf2ba08 RSP=ffff88806cf09e40 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806cf09ff8 R12=ffff88806cf2c250 R13=ffff88806cf2b940 R14=ffff88806cf2b9c0 R15=dffffc0000000000 RIP=ffffffff814c0864 RFL=00000002 [-------] 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 00007feab7732900 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=00007feab7ace3ec CR3=00000000147c4000 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=6720646572637465733a4d41503d706f 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