syzkaller login: [ 34.525887] BUG: Bad rss-counter state mm:00000000fc6bd535 type:MM_FILEPAGES val:33 [ 34.527297] BUG: Bad rss-counter state mm:00000000fc6bd535 type:MM_ANONPAGES val:22 [ 34.668104] ================================================================== [ 34.669297] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.670634] Read of size 8 at addr ffff8880094bd310 by task sshd/220 [ 34.671520] [ 34.671776] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.672733] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.673831] Call Trace: [ 34.674186] [ 34.674503] dump_stack_lvl+0x91/0xf0 [ 34.675048] print_report+0xcc/0x620 [ 34.675583] ? __virt_addr_valid+0x102/0x340 [ 34.676193] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.676876] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.677570] kasan_report+0xbe/0xf0 [ 34.678118] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.678832] vma_interval_tree_remove+0xc75/0xec0 [ 34.679524] vma_prepare+0xc54/0x11a0 [ 34.680076] __split_vma+0x5af/0x950 [ 34.680618] ? __pfx___split_vma+0x10/0x10 [ 34.681232] ? find_held_lock+0x2c/0x110 [ 34.681852] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.682503] ? lock_is_held_type+0x9f/0x120 [ 34.683125] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.683826] ? mtree_range_walk+0x632/0x900 [ 34.684463] ? mas_walk+0x5c7/0x7c0 [ 34.685010] do_vmi_munmap+0x1f1/0x2b0 [ 34.685588] mmap_region+0x1f9/0x2660 [ 34.686143] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.686732] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.687554] ? __pfx_lock_acquire+0x10/0x10 [ 34.688174] ? __pfx_mmap_region+0x10/0x10 [ 34.688788] ? security_mmap_addr+0x7d/0xa0 [ 34.689400] ? get_unmapped_area+0x1f5/0x3f0 [ 34.690047] do_mmap+0x854/0xf00 [ 34.690555] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.691122] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.691772] ksys_mmap_pgoff+0x3af/0x500 [ 34.692355] do_syscall_64+0x3f/0x90 [ 34.692909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.693688] RIP: 0033:0x7f5ee4b17d82 [ 34.694207] 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 [ 34.696637] RSP: 002b:00007fffe2e4fe38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.697689] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5ee4b17d82 [ 34.698665] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5ee3f51000 [ 34.699640] RBP: 00007f5ee3f51000 R08: 0000000000000009 R09: 0000000000001000 [ 34.700609] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee0bbf7ec0 [ 34.701576] R13: 00007fffe2e4fe50 R14: 00007fffe2e4fe80 R15: 00007fffe2e501e0 [ 34.702562] [ 34.702894] [ 34.703138] Allocated by task 213: [ 34.703626] kasan_save_stack+0x22/0x50 [ 34.704338] kasan_set_track+0x25/0x30 [ 34.704918] __kasan_slab_alloc+0x59/0x70 [ 34.705547] kmem_cache_alloc+0x16b/0x370 [ 34.706153] vm_area_dup+0x20/0x160 [ 34.706686] __split_vma+0x170/0x950 [ 34.707230] split_vma+0xc6/0x110 [ 34.707743] mprotect_fixup+0x8d2/0xb30 [ 34.708328] do_mprotect_pkey+0x87e/0xd40 [ 34.708939] __x64_sys_mprotect+0x78/0xc0 [ 34.709554] do_syscall_64+0x3f/0x90 [ 34.710142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.710884] [ 34.711135] Freed by task 213: [ 34.711582] kasan_save_stack+0x22/0x50 [ 34.712167] kasan_set_track+0x25/0x30 [ 34.712738] kasan_save_free_info+0x2b/0x50 [ 34.713348] __kasan_slab_free+0x10a/0x190 [ 34.713973] kmem_cache_free+0x10d/0x4d0 [ 34.714560] rcu_core+0x8c8/0x2860 [ 34.715077] __do_softirq+0x1b7/0x7d4 [ 34.715623] [ 34.715872] Last potentially related work creation: [ 34.716548] kasan_save_stack+0x22/0x50 [ 34.717132] __kasan_record_aux_stack+0x8e/0xa0 [ 34.717805] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.718546] remove_vma+0x139/0x170 [ 34.719068] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.719713] do_vmi_munmap+0x1f1/0x2b0 [ 34.720261] __vm_munmap+0x138/0x3a0 [ 34.720790] __x64_sys_munmap+0x59/0x80 [ 34.721350] do_syscall_64+0x3f/0x90 [ 34.721896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.722624] [ 34.722871] The buggy address belongs to the object at ffff8880094bd2b8 [ 34.722871] which belongs to the cache vm_area_struct of size 168 [ 34.724531] The buggy address is located 88 bytes inside of [ 34.724531] freed 168-byte region [ffff8880094bd2b8, ffff8880094bd360) [ 34.726133] [ 34.726375] The buggy address belongs to the physical page: [ 34.727115] page:0000000095caed6c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94bd [ 34.728336] memcg:ffff88800f4de901 [ 34.728818] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.729555] page_type: 0xffffffff() [ 34.730069] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.731107] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f4de901 [ 34.732128] page dumped because: kasan: bad access detected [ 34.732872] [ 34.733116] Memory state around the buggy address: [ 34.733785] ffff8880094bd200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 34.734748] ffff8880094bd280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.735722] >ffff8880094bd300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.736687] ^ [ 34.737217] ffff8880094bd380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.738191] ffff8880094bd400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.739155] ================================================================== [ 34.740379] Disabling lock debugging due to kernel taint [ 36.702959] BUG: Bad rss-counter state mm:0000000006768a76 type:MM_FILEPAGES val:33 [ 36.704919] BUG: Bad rss-counter state mm:0000000006768a76 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20165' (ECDSA) to the list of known hosts. [ 37.333893] BUG: Bad rss-counter state mm:0000000094661ab4 type:MM_FILEPAGES val:33 [ 37.335003] BUG: Bad rss-counter state mm:0000000094661ab4 type:MM_ANONPAGES val:22 2023/06/20 08:44:54 fuzzer started 2023/06/20 08:44:54 dialing manager at localhost:44161 2023/06/20 08:44:54 checking machine... 2023/06/20 08:44:54 checking revisions... [ 37.951888] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:44:54 testing simple program... [ 38.007781] cgroup: Unknown subsys name 'net' [ 38.045135] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:44:50 Registers: info registers vcpu 0 RAX=ffffffff836382d7 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001e9ee68 RSI=ffffffff836382d7 RDI=ffff88800f4f73b0 RBP=ffff88800f4f7380 RSP=ffff88800f4f72e0 R8 =0000000000000001 R9 =ffff88800f4f7328 R10=0000000000038001 R11=000000000009a9d0 R12=ffff88800f4f73b0 R13=0000000000000000 R14=ffff88800ffdd1c0 R15=0000000000092820 RIP=ffffffff813ad420 RFL=00000286 [--S--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 00007efe67643900 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=00007efe66a83ec0 CR3=000000000f76e000 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=6e5cf21c438ec59eff40fea52e5e2c82 XMM02=000000000011ce80eff9b2d0a8fce9cb XMM03=000000000011cf502c67c8bc2e329bc3 XMM04=158114cb713c62f400000000000ae988 XMM05=e2171498c22f97ef0000000000135248 XMM06=4fda316b135da52b00000000001342e8 XMM07=fb795ef6d65770560000000000124870 XMM08=2c67c8bc2e329bc3000000000011cef0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000001255 RCX=0000000000000000 RDX=ffff8880100a3680 RSI=ffffffff8171b237 RDI=0000000000000007 RBP=ffff88801672e000 RSP=ffff888019e7fe70 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000200 R11=0000000000000000 R12=0000000000000000 R13=00007f7a4a7cf0b0 R14=0000000000000200 R15=0000000000000040 RIP=ffffffff814c081b RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7a4a217900 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=00007f7a4a7cf0b0 CR3=0000000009d60000 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=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