syzkaller login: [ 136.290672] BUG: Bad rss-counter state mm:000000004e5268c5 type:MM_FILEPAGES val:33 [ 136.291510] BUG: Bad rss-counter state mm:000000004e5268c5 type:MM_ANONPAGES val:22 [ 136.405021] ================================================================== [ 136.405723] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 136.406476] Read of size 8 at addr ffff888016cbc5c8 by task sshd/219 [ 136.407090] [ 136.407261] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 136.408161] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 136.408946] Call Trace: [ 136.409204] [ 136.409426] dump_stack_lvl+0x91/0xf0 [ 136.409809] print_report+0xcc/0x620 [ 136.410214] ? __virt_addr_valid+0x102/0x340 [ 136.410665] ? vma_interval_tree_remove+0xc75/0xec0 [ 136.411149] ? vma_interval_tree_remove+0xc75/0xec0 [ 136.411523] kasan_report+0xbe/0xf0 [ 136.411783] ? vma_interval_tree_remove+0xc75/0xec0 [ 136.412139] vma_interval_tree_remove+0xc75/0xec0 [ 136.412484] vma_prepare+0xc54/0x11a0 [ 136.412748] __split_vma+0x5af/0x950 [ 136.413009] ? __pfx___split_vma+0x10/0x10 [ 136.413306] ? find_held_lock+0x2c/0x110 [ 136.413597] do_vmi_align_munmap+0x2ba/0x11f0 [ 136.413911] ? lock_is_held_type+0x9f/0x120 [ 136.414222] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 136.414566] ? mtree_range_walk+0x632/0x900 [ 136.414872] ? mas_walk+0x5c7/0x7c0 [ 136.415147] do_vmi_munmap+0x1f1/0x2b0 [ 136.415423] mmap_region+0x1f9/0x2660 [ 136.415688] ? vm_mmap_pgoff+0x15c/0x3a0 [ 136.415969] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 136.416376] ? __pfx_lock_acquire+0x10/0x10 [ 136.416673] ? __pfx_mmap_region+0x10/0x10 [ 136.416965] ? security_mmap_addr+0x7d/0xa0 [ 136.417268] ? get_unmapped_area+0x1f5/0x3f0 [ 136.417581] do_mmap+0x854/0xf00 [ 136.417828] vm_mmap_pgoff+0x1a6/0x3a0 [ 136.418118] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 136.418450] ksys_mmap_pgoff+0x3af/0x500 [ 136.418743] do_syscall_64+0x3f/0x90 [ 136.419022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 136.419409] RIP: 0033:0x7f22f64a2d82 [ 136.419667] 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 [ 136.420935] RSP: 002b:00007ffe3ca587e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 136.421464] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22f64a2d82 [ 136.421954] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22f58dc000 [ 136.422457] RBP: 00007f22f58dc000 R08: 0000000000000009 R09: 0000000000001000 [ 136.422946] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a4472db20 [ 136.423452] R13: 00007ffe3ca58800 R14: 00007ffe3ca58830 R15: 00007ffe3ca58b90 [ 136.423952] [ 136.424128] [ 136.424255] Allocated by task 212: [ 136.424505] kasan_save_stack+0x22/0x50 [ 136.424786] kasan_set_track+0x25/0x30 [ 136.425078] __kasan_slab_alloc+0x59/0x70 [ 136.425380] kmem_cache_alloc+0x16b/0x370 [ 136.425681] vm_area_dup+0x20/0x160 [ 136.425951] __split_vma+0x170/0x950 [ 136.426217] split_vma+0xc6/0x110 [ 136.426476] mprotect_fixup+0x8d2/0xb30 [ 136.426762] do_mprotect_pkey+0x87e/0xd40 [ 136.427070] __x64_sys_mprotect+0x78/0xc0 [ 136.427374] do_syscall_64+0x3f/0x90 [ 136.427644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 136.427999] [ 136.428135] Freed by task 13: [ 136.428360] kasan_save_stack+0x22/0x50 [ 136.428644] kasan_set_track+0x25/0x30 [ 136.428921] kasan_save_free_info+0x2b/0x50 [ 136.429225] __kasan_slab_free+0x10a/0x190 [ 136.429528] kmem_cache_free+0x10d/0x4d0 [ 136.429812] rcu_core+0x8c8/0x2860 [ 136.430073] __do_softirq+0x1b7/0x7d4 [ 136.430345] [ 136.430474] Last potentially related work creation: [ 136.430808] kasan_save_stack+0x22/0x50 [ 136.431105] __kasan_record_aux_stack+0x8e/0xa0 [ 136.431434] __call_rcu_common.constprop.0+0x6a/0xb90 [ 136.431797] remove_vma+0x139/0x170 [ 136.432063] do_vmi_align_munmap+0xd4a/0x11f0 [ 136.432383] do_vmi_munmap+0x1f1/0x2b0 [ 136.432658] __vm_munmap+0x138/0x3a0 [ 136.432920] __x64_sys_munmap+0x59/0x80 [ 136.433212] do_syscall_64+0x3f/0x90 [ 136.433477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 136.433833] [ 136.433958] The buggy address belongs to the object at ffff888016cbc570 [ 136.433958] which belongs to the cache vm_area_struct of size 168 [ 136.434802] The buggy address is located 88 bytes inside of [ 136.434802] freed 168-byte region [ffff888016cbc570, ffff888016cbc618) [ 136.435600] [ 136.435724] The buggy address belongs to the physical page: [ 136.436106] page:000000006841f6e7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cbc [ 136.436727] memcg:ffff88800c98e001 [ 136.436965] flags: 0x100000000000200(slab|node=0|zone=1) [ 136.437351] page_type: 0xffffffff() [ 136.437606] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 136.438133] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c98e001 [ 136.438654] page dumped because: kasan: bad access detected [ 136.439037] [ 136.439163] Memory state around the buggy address: [ 136.439496] ffff888016cbc480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 136.439977] ffff888016cbc500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 136.440456] >ffff888016cbc580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 136.440938] ^ [ 136.441327] ffff888016cbc600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 136.441815] ffff888016cbc680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 136.442328] ================================================================== [ 136.442871] Disabling lock debugging due to kernel taint [ 137.620214] BUG: Bad rss-counter state mm:00000000b4fb184e type:MM_FILEPAGES val:33 [ 137.620741] BUG: Bad rss-counter state mm:00000000b4fb184e type:MM_ANONPAGES val:22 [ 138.183459] BUG: Bad rss-counter state mm:000000007b32c9d5 type:MM_FILEPAGES val:33 [ 138.184704] BUG: Bad rss-counter state mm:000000007b32c9d5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19429' (ECDSA) to the list of known hosts. 2023/06/20 02:30:06 fuzzer started 2023/06/20 02:30:06 dialing manager at localhost:44161 2023/06/20 02:30:06 checking machine... 2023/06/20 02:30:06 checking revisions... [ 138.800750] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:30:06 testing simple program... [ 138.861033] cgroup: Unknown subsys name 'net' [ 138.943891] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:28:18 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff818e4386 RDX=ffff888015870000 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88801586f8e8 RSP=ffff88801586f838 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=1ffff11002b0df0b R13=ffff8880169da028 R14=00000000ffffffff R15=ffff888008fbd3a0 RIP=ffffffff814c07eb RFL=00000297 [--S-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 00007f0ecfc9d900 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=00007f55157d4650 CR3=000000000ca94000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=5a606fbbf37234af00000000000ae988 XMM05=5a6c5ab54b69c2ce0000000000142340 XMM06=4fda316b135da52b0000000000141130 XMM07=fb795ef6d65770560000000000131138 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00005593171e4050 CR3=00000000183ec000 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=2035303a30333a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a30333a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000