syzkaller login: [ 30.670580] BUG: Bad rss-counter state mm:00000000f3e7ce03 type:MM_FILEPAGES val:33 [ 30.671740] BUG: Bad rss-counter state mm:00000000f3e7ce03 type:MM_ANONPAGES val:22 [ 30.826064] ================================================================== [ 30.826966] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.828006] Read of size 8 at addr ffff888016a5c880 by task sshd/220 [ 30.828773] [ 30.828996] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.829887] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.830862] Call Trace: [ 30.831182] [ 30.831468] dump_stack_lvl+0x91/0xf0 [ 30.831959] print_report+0xcc/0x620 [ 30.832449] ? __virt_addr_valid+0x102/0x340 [ 30.832997] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.833613] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.834243] kasan_report+0xbe/0xf0 [ 30.834722] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.835351] vma_interval_tree_remove+0xc75/0xec0 [ 30.835990] vma_prepare+0xc54/0x11a0 [ 30.836484] __split_vma+0x5af/0x950 [ 30.836959] ? __pfx___split_vma+0x10/0x10 [ 30.837493] ? find_held_lock+0x2c/0x110 [ 30.838040] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.838609] ? lock_is_held_type+0x9f/0x120 [ 30.839151] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.839762] ? mtree_range_walk+0x632/0x900 [ 30.840323] ? mas_walk+0x5c7/0x7c0 [ 30.840804] do_vmi_munmap+0x1f1/0x2b0 [ 30.841293] mmap_region+0x1f9/0x2660 [ 30.841785] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.842299] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.843022] ? __pfx_lock_acquire+0x10/0x10 [ 30.843573] ? __pfx_mmap_region+0x10/0x10 [ 30.844127] ? security_mmap_addr+0x7d/0xa0 [ 30.844682] ? get_unmapped_area+0x1f5/0x3f0 [ 30.845249] do_mmap+0x854/0xf00 [ 30.845709] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.846222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.846792] ksys_mmap_pgoff+0x3af/0x500 [ 30.847325] do_syscall_64+0x3f/0x90 [ 30.847806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.848464] RIP: 0033:0x7fc931ac1d82 [ 30.848925] 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 [ 30.851066] RSP: 002b:00007ffebbcc7318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.851975] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc931ac1d82 [ 30.852818] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc930efb000 [ 30.853665] RBP: 00007fc930efb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.854511] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558315a5bec0 [ 30.855357] R13: 00007ffebbcc7330 R14: 00007ffebbcc7360 R15: 00007ffebbcc76c0 [ 30.856217] [ 30.856511] [ 30.856726] Allocated by task 213: [ 30.857159] kasan_save_stack+0x22/0x50 [ 30.857681] kasan_set_track+0x25/0x30 [ 30.858179] __kasan_slab_alloc+0x59/0x70 [ 30.858708] kmem_cache_alloc+0x16b/0x370 [ 30.859221] vm_area_dup+0x20/0x160 [ 30.859675] __split_vma+0x170/0x950 [ 30.860137] split_vma+0xc6/0x110 [ 30.860574] mprotect_fixup+0x8d2/0xb30 [ 30.861070] do_mprotect_pkey+0x87e/0xd40 [ 30.861585] __x64_sys_mprotect+0x78/0xc0 [ 30.862115] do_syscall_64+0x3f/0x90 [ 30.862592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.863235] [ 30.863449] Freed by task 213: [ 30.863841] kasan_save_stack+0x22/0x50 [ 30.864342] kasan_set_track+0x25/0x30 [ 30.864843] kasan_save_free_info+0x2b/0x50 [ 30.865382] __kasan_slab_free+0x10a/0x190 [ 30.865929] kmem_cache_free+0x10d/0x4d0 [ 30.866438] rcu_core+0x8c8/0x2860 [ 30.866878] __do_softirq+0x1b7/0x7d4 [ 30.867359] [ 30.867573] Last potentially related work creation: [ 30.868166] kasan_save_stack+0x22/0x50 [ 30.868671] __kasan_record_aux_stack+0x8e/0xa0 [ 30.869242] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.869903] remove_vma+0x139/0x170 [ 30.870373] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.870948] do_vmi_munmap+0x1f1/0x2b0 [ 30.871450] __vm_munmap+0x138/0x3a0 [ 30.871938] __x64_sys_munmap+0x59/0x80 [ 30.872452] do_syscall_64+0x3f/0x90 [ 30.872945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.873617] [ 30.873855] The buggy address belongs to the object at ffff888016a5c828 [ 30.873855] which belongs to the cache vm_area_struct of size 168 [ 30.875398] The buggy address is located 88 bytes inside of [ 30.875398] freed 168-byte region [ffff888016a5c828, ffff888016a5c8d0) [ 30.876864] [ 30.877083] The buggy address belongs to the physical page: [ 30.877781] page:000000001005668d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a5c [ 30.878926] memcg:ffff888016a55001 [ 30.879374] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.880045] page_type: 0xffffffff() [ 30.880519] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.881473] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a55001 [ 30.882410] page dumped because: kasan: bad access detected [ 30.883079] [ 30.883297] Memory state around the buggy address: [ 30.883889] ffff888016a5c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.884760] ffff888016a5c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.885606] >ffff888016a5c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.886455] ^ [ 30.886858] ffff888016a5c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.887697] ffff888016a5c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.888547] ================================================================== [ 30.889500] Disabling lock debugging due to kernel taint [ 33.718314] BUG: Bad rss-counter state mm:00000000833cff55 type:MM_FILEPAGES val:33 [ 33.719375] BUG: Bad rss-counter state mm:00000000833cff55 type:MM_ANONPAGES val:22 [ 34.202145] BUG: Bad rss-counter state mm:000000007ef8fc4e type:MM_FILEPAGES val:33 [ 34.203321] BUG: Bad rss-counter state mm:000000007ef8fc4e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55996' (ECDSA) to the list of known hosts. 2023/06/21 04:58:57 fuzzer started 2023/06/21 04:58:57 dialing manager at localhost:36067 2023/06/21 04:58:57 checking machine... 2023/06/21 04:58:57 checking revisions... [ 34.920884] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:58:57 testing simple program... [ 34.971847] cgroup: Unknown subsys name 'net' [ 35.026938] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:58:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880183b1b40 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffff8880183b1f34 RBP=00007f8de7e9420c RSP=ffff88800fe47508 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007f8de7e9420c R13=0000000000000000 R14=ffff8880183b1b40 R15=ffff88801cb1d130 RIP=ffffffff8135bd6b RFL=00000213 [----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 00007f8de79a1900 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=00007f8de7f56650 CR3=000000000fde8000 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=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 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff846000a9 RDX=0000000000000002 RSI=ffffffff864bbb4e RDI=ffffffff86055348 RBP=ffff88800fe47920 RSP=ffff88800fe47840 R8 =ffffffff864bbb4e R9 =ffff88800fe47908 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88800fe47928 R13=ffff88800fe47910 R14=ffff88800fe47909 R15=ffff88800fe478c8 RIP=ffffffff8112fc16 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 00007f8de79a1900 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=00007f8de7f58618 CR3=000000000fde8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000