syzkaller login: [ 31.105460] BUG: Bad rss-counter state mm:00000000f31db1ea type:MM_FILEPAGES val:33 [ 31.106475] BUG: Bad rss-counter state mm:00000000f31db1ea type:MM_ANONPAGES val:22 [ 31.267766] ================================================================== [ 31.268871] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.269990] Read of size 8 at addr ffff88800d5e63f8 by task sshd/220 [ 31.270855] [ 31.271071] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.271939] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.272935] Call Trace: [ 31.273255] [ 31.273553] dump_stack_lvl+0x91/0xf0 [ 31.274046] print_report+0xcc/0x620 [ 31.274528] ? __virt_addr_valid+0x102/0x340 [ 31.275090] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.275710] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.276325] kasan_report+0xbe/0xf0 [ 31.276808] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.277443] vma_interval_tree_remove+0xc75/0xec0 [ 31.278054] vma_prepare+0xc54/0x11a0 [ 31.278534] __split_vma+0x5af/0x950 [ 31.279009] ? __pfx___split_vma+0x10/0x10 [ 31.279541] ? find_held_lock+0x2c/0x110 [ 31.280060] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.280636] ? lock_is_held_type+0x9f/0x120 [ 31.281172] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.281808] ? mtree_range_walk+0x632/0x900 [ 31.282362] ? mas_walk+0x5c7/0x7c0 [ 31.282850] do_vmi_munmap+0x1f1/0x2b0 [ 31.283351] mmap_region+0x1f9/0x2660 [ 31.283831] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.284356] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.285079] ? __pfx_lock_acquire+0x10/0x10 [ 31.285641] ? __pfx_mmap_region+0x10/0x10 [ 31.286172] ? security_mmap_addr+0x7d/0xa0 [ 31.286704] ? get_unmapped_area+0x1f5/0x3f0 [ 31.287263] do_mmap+0x854/0xf00 [ 31.287711] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.288217] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.288784] ksys_mmap_pgoff+0x3af/0x500 [ 31.289298] do_syscall_64+0x3f/0x90 [ 31.289828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.290481] RIP: 0033:0x7f31cde63d82 [ 31.290941] 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 [ 31.293095] RSP: 002b:00007fff8203b488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.294024] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f31cde63d82 [ 31.294882] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f31cd29d000 [ 31.295728] RBP: 00007f31cd29d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.296585] R10: 0000000000000812 R11: 0000000000000206 R12: 00005558aa34dd90 [ 31.297450] R13: 00007fff8203b4a0 R14: 00007fff8203b4d0 R15: 00007fff8203b830 [ 31.298306] [ 31.298601] [ 31.298816] Allocated by task 213: [ 31.299244] kasan_save_stack+0x22/0x50 [ 31.299757] kasan_set_track+0x25/0x30 [ 31.300251] __kasan_slab_alloc+0x59/0x70 [ 31.300776] kmem_cache_alloc+0x16b/0x370 [ 31.301292] vm_area_dup+0x20/0x160 [ 31.301770] __split_vma+0x170/0x950 [ 31.302243] split_vma+0xc6/0x110 [ 31.302697] mprotect_fixup+0x8d2/0xb30 [ 31.303206] do_mprotect_pkey+0x87e/0xd40 [ 31.303727] __x64_sys_mprotect+0x78/0xc0 [ 31.304256] do_syscall_64+0x3f/0x90 [ 31.304752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.305411] [ 31.305630] Freed by task 13: [ 31.306017] kasan_save_stack+0x22/0x50 [ 31.306522] kasan_set_track+0x25/0x30 [ 31.307022] kasan_save_free_info+0x2b/0x50 [ 31.307562] __kasan_slab_free+0x10a/0x190 [ 31.308099] kmem_cache_free+0x10d/0x4d0 [ 31.308618] rcu_core+0x8c8/0x2860 [ 31.309063] __do_softirq+0x1b7/0x7d4 [ 31.309565] [ 31.309785] Last potentially related work creation: [ 31.310388] kasan_save_stack+0x22/0x50 [ 31.310897] __kasan_record_aux_stack+0x8e/0xa0 [ 31.311480] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.312134] remove_vma+0x139/0x170 [ 31.312597] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.313156] do_vmi_munmap+0x1f1/0x2b0 [ 31.313661] __vm_munmap+0x138/0x3a0 [ 31.314145] __x64_sys_munmap+0x59/0x80 [ 31.314646] do_syscall_64+0x3f/0x90 [ 31.315122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.315766] [ 31.315980] Second to last potentially related work creation: [ 31.316672] kasan_save_stack+0x22/0x50 [ 31.317178] __kasan_record_aux_stack+0x8e/0xa0 [ 31.317786] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.318439] remove_vma+0x139/0x170 [ 31.318899] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.319465] do_vmi_munmap+0x1f1/0x2b0 [ 31.319956] mmap_region+0x1f9/0x2660 [ 31.320439] do_mmap+0x854/0xf00 [ 31.320877] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.321375] ksys_mmap_pgoff+0x3af/0x500 [ 31.321883] do_syscall_64+0x3f/0x90 [ 31.322365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.323021] [ 31.323235] The buggy address belongs to the object at ffff88800d5e63a0 [ 31.323235] which belongs to the cache vm_area_struct of size 168 [ 31.324729] The buggy address is located 88 bytes inside of [ 31.324729] freed 168-byte region [ffff88800d5e63a0, ffff88800d5e6448) [ 31.326168] [ 31.326383] The buggy address belongs to the physical page: [ 31.327048] page:000000009d4d1ace refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5e6 [ 31.328135] memcg:ffff88800d66f701 [ 31.328562] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.329272] page_type: 0xffffffff() [ 31.329742] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ab580 dead000000000005 [ 31.330668] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d66f701 [ 31.331575] page dumped because: kasan: bad access detected [ 31.332231] [ 31.332448] Memory state around the buggy address: [ 31.333034] ffff88800d5e6280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.333896] ffff88800d5e6300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.334751] >ffff88800d5e6380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.335592] ^ [ 31.336434] ffff88800d5e6400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.337295] ffff88800d5e6480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.338164] ================================================================== [ 31.339181] Disabling lock debugging due to kernel taint [ 33.111182] BUG: Bad rss-counter state mm:0000000002b6a746 type:MM_FILEPAGES val:33 [ 33.112014] BUG: Bad rss-counter state mm:0000000002b6a746 type:MM_ANONPAGES val:22 [ 33.563704] BUG: Bad rss-counter state mm:00000000d901dcfc type:MM_FILEPAGES val:33 [ 33.564875] BUG: Bad rss-counter state mm:00000000d901dcfc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34273' (ECDSA) to the list of known hosts. 2023/06/21 07:18:13 fuzzer started 2023/06/21 07:18:14 dialing manager at localhost:36067 2023/06/21 07:18:14 checking machine... 2023/06/21 07:18:14 checking revisions... [ 34.216706] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:18:14 testing simple program... [ 34.272074] cgroup: Unknown subsys name 'net' [ 34.331639] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:18:13 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffdaa1d3a08 CR3=0000000005482000 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=00007f950eb9a51000005621f6f06790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007ffdfbe2d084 RCX=00007ffdfbe2d0a0 RDX=00007ffdfbe2d050 RSI=00007ffdfbe2d04c RDI=000055f407c6f2b0 RBP=00007ffdfbe2d2c0 RSP=00007ffdfbe2cfc0 R8 =0000000000000001 R9 =00007fae565c9860 R10=00007ffdfbe2c234 R11=0000000000000206 R12=fffffffffffffdf8 R13=00007ffdfbe2d8b0 R14=0000000000000000 R15=00007ffdfbe2d450 RIP=00007fae5655cfb4 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fae5604e900 00000000 00000000 GS =0000 0000000000000000 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=00007fae56605618 CR3=0000000010314000 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=563412feff00545000000000000080fe 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