syzkaller login: [ 31.146454] BUG: Bad rss-counter state mm:00000000011d67b6 type:MM_FILEPAGES val:33 [ 31.147650] BUG: Bad rss-counter state mm:00000000011d67b6 type:MM_ANONPAGES val:22 [ 31.183411] ================================================================== [ 31.184509] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.185436] Read of size 8 at addr ffff888016a213f8 by task sshd/219 [ 31.186297] [ 31.186525] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.187619] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.188685] Call Trace: [ 31.189081] [ 31.189430] dump_stack_lvl+0x91/0xf0 [ 31.190036] print_report+0xcc/0x620 [ 31.190656] ? __virt_addr_valid+0x102/0x340 [ 31.191211] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.191829] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.192441] kasan_report+0xbe/0xf0 [ 31.192913] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.193548] vma_interval_tree_remove+0xc75/0xec0 [ 31.194163] vma_prepare+0xc54/0x11a0 [ 31.194680] __split_vma+0x5af/0x950 [ 31.195366] ? __pfx___split_vma+0x10/0x10 [ 31.195913] ? find_held_lock+0x2c/0x110 [ 31.196443] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.197028] ? lock_is_held_type+0x9f/0x120 [ 31.197592] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.198210] ? mtree_range_walk+0x632/0x900 [ 31.198800] ? mas_walk+0x5c7/0x7c0 [ 31.199293] do_vmi_munmap+0x1f1/0x2b0 [ 31.199797] mmap_region+0x1f9/0x2660 [ 31.200293] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.200817] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.201563] ? __pfx_lock_acquire+0x10/0x10 [ 31.202107] ? __pfx_mmap_region+0x10/0x10 [ 31.202677] ? security_mmap_addr+0x7d/0xa0 [ 31.203222] ? get_unmapped_area+0x1f5/0x3f0 [ 31.203785] do_mmap+0x854/0xf00 [ 31.204237] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.204750] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.205322] ksys_mmap_pgoff+0x3af/0x500 [ 31.205840] do_syscall_64+0x3f/0x90 [ 31.206339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.207011] RIP: 0033:0x7f249e273d82 [ 31.207484] 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 [ 31.209672] RSP: 002b:00007ffc3c293c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.210610] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f249e273d82 [ 31.211478] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f249d6ad000 [ 31.212351] RBP: 00007f249d6ad000 R08: 0000000000000009 R09: 0000000000001000 [ 31.213221] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d950fa1f70 [ 31.214088] R13: 00007ffc3c293c70 R14: 00007ffc3c293ca0 R15: 00007ffc3c294000 [ 31.214987] [ 31.215287] [ 31.215508] Allocated by task 212: [ 31.215947] kasan_save_stack+0x22/0x50 [ 31.216460] kasan_set_track+0x25/0x30 [ 31.216969] __kasan_slab_alloc+0x59/0x70 [ 31.217505] kmem_cache_alloc+0x16b/0x370 [ 31.218029] vm_area_dup+0x20/0x160 [ 31.218507] __split_vma+0x170/0x950 [ 31.218990] split_vma+0xc6/0x110 [ 31.219440] mprotect_fixup+0x8d2/0xb30 [ 31.219953] do_mprotect_pkey+0x87e/0xd40 [ 31.220486] __x64_sys_mprotect+0x78/0xc0 [ 31.221019] do_syscall_64+0x3f/0x90 [ 31.221505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.222168] [ 31.222389] Freed by task 212: [ 31.222810] kasan_save_stack+0x22/0x50 [ 31.223324] kasan_set_track+0x25/0x30 [ 31.223829] kasan_save_free_info+0x2b/0x50 [ 31.224386] __kasan_slab_free+0x10a/0x190 [ 31.224934] kmem_cache_free+0x10d/0x4d0 [ 31.225461] rcu_core+0x8c8/0x2860 [ 31.225917] __do_softirq+0x1b7/0x7d4 [ 31.226412] [ 31.226637] Last potentially related work creation: [ 31.227236] kasan_save_stack+0x22/0x50 [ 31.227758] __kasan_record_aux_stack+0x8e/0xa0 [ 31.228344] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.228999] remove_vma+0x139/0x170 [ 31.229468] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.230044] do_vmi_munmap+0x1f1/0x2b0 [ 31.230551] __vm_munmap+0x138/0x3a0 [ 31.231030] __x64_sys_munmap+0x59/0x80 [ 31.231544] do_syscall_64+0x3f/0x90 [ 31.232028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.232691] [ 31.232911] The buggy address belongs to the object at ffff888016a213a0 [ 31.232911] which belongs to the cache vm_area_struct of size 168 [ 31.234435] The buggy address is located 88 bytes inside of [ 31.234435] freed 168-byte region [ffff888016a213a0, ffff888016a21448) [ 31.235877] [ 31.236103] The buggy address belongs to the physical page: [ 31.236784] page:000000004e0e7d46 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a21 [ 31.237904] memcg:ffff888018e68301 [ 31.238346] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.239018] page_type: 0xffffffff() [ 31.239484] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.240462] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e68301 [ 31.241392] page dumped because: kasan: bad access detected [ 31.242080] [ 31.242302] Memory state around the buggy address: [ 31.242919] ffff888016a21280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.243799] ffff888016a21300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.244671] >ffff888016a21380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.245551] ^ [ 31.246423] ffff888016a21400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.247309] ffff888016a21480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.248191] ================================================================== [ 31.249126] Disabling lock debugging due to kernel taint [ 33.185181] BUG: Bad rss-counter state mm:0000000009f4d4cb type:MM_FILEPAGES val:33 [ 33.186391] BUG: Bad rss-counter state mm:0000000009f4d4cb type:MM_ANONPAGES val:22 [ 33.744674] BUG: Bad rss-counter state mm:000000001955dbd1 type:MM_FILEPAGES val:33 [ 33.745860] BUG: Bad rss-counter state mm:000000001955dbd1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46485' (ECDSA) to the list of known hosts. 2023/06/20 22:28:14 fuzzer started 2023/06/20 22:28:14 dialing manager at localhost:36067 2023/06/20 22:28:14 checking machine... 2023/06/20 22:28:14 checking revisions... [ 34.375383] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:28:14 testing simple program... [ 34.425927] cgroup: Unknown subsys name 'net' [ 34.460470] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:28:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff818080da RDX=dffffc0000000000 RSI=0000000000008080 RDI=ffff88800d99f5d0 RBP=ffff88800d99f628 RSP=ffff88800d99f560 R8 =0000000000000001 R9 =ffff88800d99f610 R10=0000000000038001 R11=0000000000021eef R12=ffff88800d99f630 R13=ffff88800d99f618 R14=ffff88800d99f611 R15=ffff88800d99f5d0 RIP=ffffffff81130764 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 00007fca9ae93900 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=000055d403fb3768 CR3=0000000009894000 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=6b94e8287123e62000000000000ae988 XMM05=e901406c3aad657a0000000000132740 XMM06=dfcdbad4f1609c370000000000131888 XMM07=fb795ef6d65770560000000000121aa0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff888018d97e58 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a80 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000008a6b1 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88800d13d1c0 R15=ffff888013e7b410 RIP=ffffffff8113038e RFL=00000246 [---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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8d89984900 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=00007f8d89f39650 CR3=000000000f1b8000 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