syzkaller login: [ 31.701165] BUG: Bad rss-counter state mm:0000000004025d4e type:MM_FILEPAGES val:33 [ 31.702759] BUG: Bad rss-counter state mm:0000000004025d4e type:MM_ANONPAGES val:22 [ 31.905491] ================================================================== [ 31.906576] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.907682] Read of size 8 at addr ffff88800e9514e0 by task sshd/223 [ 31.908643] [ 31.908860] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.909751] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.910724] Call Trace: [ 31.911043] [ 31.911327] dump_stack_lvl+0x91/0xf0 [ 31.911820] print_report+0xcc/0x620 [ 31.912305] ? __virt_addr_valid+0x102/0x340 [ 31.912860] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.913497] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.914111] kasan_report+0xbe/0xf0 [ 31.914595] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.915221] vma_interval_tree_remove+0xc75/0xec0 [ 31.915814] vma_prepare+0xc54/0x11a0 [ 31.916296] __split_vma+0x5af/0x950 [ 31.916769] ? __pfx___split_vma+0x10/0x10 [ 31.917292] ? find_held_lock+0x2c/0x110 [ 31.917838] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.918401] ? lock_is_held_type+0x9f/0x120 [ 31.918936] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.919563] ? mtree_range_walk+0x632/0x900 [ 31.920123] ? mas_walk+0x5c7/0x7c0 [ 31.920601] do_vmi_munmap+0x1f1/0x2b0 [ 31.921101] mmap_region+0x1f9/0x2660 [ 31.921594] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.922104] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.922824] ? __pfx_lock_acquire+0x10/0x10 [ 31.923349] ? __pfx_mmap_region+0x10/0x10 [ 31.923896] ? security_mmap_addr+0x7d/0xa0 [ 31.924423] ? get_unmapped_area+0x1f5/0x3f0 [ 31.924966] do_mmap+0x854/0xf00 [ 31.925408] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.925907] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.926465] ksys_mmap_pgoff+0x3af/0x500 [ 31.926977] do_syscall_64+0x3f/0x90 [ 31.927461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.928099] RIP: 0033:0x7fd4deb3bd82 [ 31.928556] 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 [ 31.930681] RSP: 002b:00007fff1e9dd388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.931578] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd4deb3bd82 [ 31.932437] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd4ddf75000 [ 31.933294] RBP: 00007fd4ddf75000 R08: 0000000000000009 R09: 0000000000001000 [ 31.934165] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d00d0d5ec0 [ 31.935011] R13: 00007fff1e9dd3a0 R14: 00007fff1e9dd3d0 R15: 00007fff1e9dd730 [ 31.935863] [ 31.936157] [ 31.936375] Allocated by task 213: [ 31.936801] kasan_save_stack+0x22/0x50 [ 31.937299] kasan_set_track+0x25/0x30 [ 31.937805] __kasan_slab_alloc+0x59/0x70 [ 31.938326] kmem_cache_alloc+0x16b/0x370 [ 31.938847] vm_area_dup+0x20/0x160 [ 31.939307] __split_vma+0x170/0x950 [ 31.939775] split_vma+0xc6/0x110 [ 31.940223] mprotect_fixup+0x8d2/0xb30 [ 31.940732] do_mprotect_pkey+0x87e/0xd40 [ 31.941253] __x64_sys_mprotect+0x78/0xc0 [ 31.941786] do_syscall_64+0x3f/0x90 [ 31.942262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.942896] [ 31.943110] Freed by task 213: [ 31.943507] kasan_save_stack+0x22/0x50 [ 31.944010] kasan_set_track+0x25/0x30 [ 31.944499] kasan_save_free_info+0x2b/0x50 [ 31.945029] __kasan_slab_free+0x10a/0x190 [ 31.945566] kmem_cache_free+0x10d/0x4d0 [ 31.946068] rcu_core+0x8c8/0x2860 [ 31.946510] __do_softirq+0x1b7/0x7d4 [ 31.946989] [ 31.947204] Last potentially related work creation: [ 31.947794] kasan_save_stack+0x22/0x50 [ 31.948317] __kasan_record_aux_stack+0x8e/0xa0 [ 31.948894] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.949551] remove_vma+0x139/0x170 [ 31.949998] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.950552] do_vmi_munmap+0x1f1/0x2b0 [ 31.951049] __vm_munmap+0x138/0x3a0 [ 31.951515] __x64_sys_munmap+0x59/0x80 [ 31.952013] do_syscall_64+0x3f/0x90 [ 31.952481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.953122] [ 31.953339] The buggy address belongs to the object at ffff88800e951488 [ 31.953339] which belongs to the cache vm_area_struct of size 168 [ 31.954819] The buggy address is located 88 bytes inside of [ 31.954819] freed 168-byte region [ffff88800e951488, ffff88800e951530) [ 31.956216] [ 31.956438] The buggy address belongs to the physical page: [ 31.957097] page:0000000037951529 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe951 [ 31.958198] memcg:ffff88800e669101 [ 31.958625] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.959279] page_type: 0xffffffff() [ 31.959731] raw: 0100000000000200 ffff88800879fc80 ffffea000067d400 dead00000000000e [ 31.960653] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e669101 [ 31.961566] page dumped because: kasan: bad access detected [ 31.962220] [ 31.962433] Memory state around the buggy address: [ 31.963012] ffff88800e951380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.963860] ffff88800e951400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.964712] >ffff88800e951480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.965588] ^ [ 31.966346] ffff88800e951500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.967196] ffff88800e951580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.968043] ================================================================== [ 31.969026] Disabling lock debugging due to kernel taint [ 33.857609] BUG: Bad rss-counter state mm:00000000956f9919 type:MM_FILEPAGES val:33 [ 33.858602] BUG: Bad rss-counter state mm:00000000956f9919 type:MM_ANONPAGES val:22 [ 34.356994] BUG: Bad rss-counter state mm:00000000e5a9bd16 type:MM_FILEPAGES val:33 [ 34.358260] BUG: Bad rss-counter state mm:00000000e5a9bd16 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58885' (ECDSA) to the list of known hosts. 2023/06/19 20:43:37 fuzzer started 2023/06/19 20:43:37 dialing manager at localhost:44161 2023/06/19 20:43:37 checking machine... 2023/06/19 20:43:37 checking revisions... [ 35.103230] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:43:37 testing simple program... [ 35.161813] cgroup: Unknown subsys name 'net' [ 35.206634] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:43:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180f43b RCX=ffffffff86137501 RDX=1ffff110011aff3a RSI=0000000000000000 RDI=ffffffff8180f43b RBP=ffffffff8180f43b RSP=ffff888008d7f928 R8 =ffffffff86137542 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000020d8a R12=0000000000000001 R13=0000000000000000 R14=ffff888008d70000 R15=ffff8880166ca8d0 RIP=ffffffff811fc772 RFL=00000283 [--S---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 0000000000000000 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=00007f5e6966aba0 CR3=000000000c462000 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=2036333a33343a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a33343a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff856528e0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=00007f29def56366 RSP=ffff88800fd6f7d0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007f29def56366 R13=0000000000000000 R14=ffff88800f5551c0 R15=ffff88800ddfdab0 RIP=ffffffff8450bdd4 RFL=00000202 [-------] 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 00007f29dea63900 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=00007ffef7db8000 CR3=000000000e550000 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