syzkaller login: [ 63.245124] BUG: Bad rss-counter state mm:00000000b59b36bb type:MM_FILEPAGES val:33 [ 63.246906] BUG: Bad rss-counter state mm:00000000b59b36bb type:MM_ANONPAGES val:22 [ 63.406449] ================================================================== [ 63.407322] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.408199] Read of size 8 at addr ffff88800c9ed310 by task sshd/226 [ 63.408914] [ 63.409126] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 63.410062] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.410978] Call Trace: [ 63.411280] [ 63.411548] dump_stack_lvl+0x91/0xf0 [ 63.412027] print_report+0xcc/0x620 [ 63.412488] ? __virt_addr_valid+0x102/0x340 [ 63.413006] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.413591] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.414174] kasan_report+0xbe/0xf0 [ 63.414633] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.415225] vma_interval_tree_remove+0xc75/0xec0 [ 63.415792] vma_prepare+0xc54/0x11a0 [ 63.416245] __split_vma+0x5af/0x950 [ 63.416710] ? __pfx___split_vma+0x10/0x10 [ 63.417218] ? find_held_lock+0x2c/0x110 [ 63.417728] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.418286] ? lock_is_held_type+0x9f/0x120 [ 63.418814] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.419409] ? mtree_range_walk+0x632/0x900 [ 63.419955] ? mas_walk+0x5c7/0x7c0 [ 63.420415] do_vmi_munmap+0x1f1/0x2b0 [ 63.420900] mmap_region+0x1f9/0x2660 [ 63.421365] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.421869] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.422586] ? __pfx_lock_acquire+0x10/0x10 [ 63.423107] ? __pfx_mmap_region+0x10/0x10 [ 63.423624] ? security_mmap_addr+0x7d/0xa0 [ 63.424138] ? get_unmapped_area+0x1f5/0x3f0 [ 63.424654] do_mmap+0x854/0xf00 [ 63.425084] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.425568] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.426116] ksys_mmap_pgoff+0x3af/0x500 [ 63.426619] do_syscall_64+0x3f/0x90 [ 63.427092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.427717] RIP: 0033:0x7fa05b179d82 [ 63.428154] 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 [ 63.430210] RSP: 002b:00007ffc6ceb14f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.431116] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa05b179d82 [ 63.431944] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa05a5b3000 [ 63.432779] RBP: 00007fa05a5b3000 R08: 0000000000000009 R09: 0000000000001000 [ 63.433607] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556fbb451d90 [ 63.434443] R13: 00007ffc6ceb1510 R14: 00007ffc6ceb1540 R15: 00007ffc6ceb18a0 [ 63.435282] [ 63.435563] [ 63.435770] Allocated by task 219: [ 63.436185] kasan_save_stack+0x22/0x50 [ 63.436679] kasan_set_track+0x25/0x30 [ 63.437154] __kasan_slab_alloc+0x59/0x70 [ 63.437667] kmem_cache_alloc+0x16b/0x370 [ 63.438168] vm_area_dup+0x20/0x160 [ 63.438622] __split_vma+0x170/0x950 [ 63.439081] split_vma+0xc6/0x110 [ 63.439510] mprotect_fixup+0x8d2/0xb30 [ 63.440004] do_mprotect_pkey+0x87e/0xd40 [ 63.440512] __x64_sys_mprotect+0x78/0xc0 [ 63.441025] do_syscall_64+0x3f/0x90 [ 63.441494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.442110] [ 63.442342] Freed by task 219: [ 63.442725] kasan_save_stack+0x22/0x50 [ 63.443210] kasan_set_track+0x25/0x30 [ 63.443695] kasan_save_free_info+0x2b/0x50 [ 63.444209] __kasan_slab_free+0x10a/0x190 [ 63.444728] kmem_cache_free+0x10d/0x4d0 [ 63.445221] rcu_core+0x8c8/0x2860 [ 63.445658] __do_softirq+0x1b7/0x7d4 [ 63.446120] [ 63.446338] Last potentially related work creation: [ 63.446912] kasan_save_stack+0x22/0x50 [ 63.447409] __kasan_record_aux_stack+0x8e/0xa0 [ 63.447973] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.448608] remove_vma+0x139/0x170 [ 63.449043] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.449594] do_vmi_munmap+0x1f1/0x2b0 [ 63.450066] __vm_munmap+0x138/0x3a0 [ 63.450573] __x64_sys_munmap+0x59/0x80 [ 63.451052] do_syscall_64+0x3f/0x90 [ 63.451517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.452140] [ 63.452347] The buggy address belongs to the object at ffff88800c9ed2b8 [ 63.452347] which belongs to the cache vm_area_struct of size 168 [ 63.453780] The buggy address is located 88 bytes inside of [ 63.453780] freed 168-byte region [ffff88800c9ed2b8, ffff88800c9ed360) [ 63.455173] [ 63.455385] The buggy address belongs to the physical page: [ 63.456026] page:000000002cefadce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9ed [ 63.457092] memcg:ffff8880194c4601 [ 63.457515] flags: 0x100000000000200(slab|node=0|zone=1) [ 63.458142] page_type: 0xffffffff() [ 63.458584] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 63.459467] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880194c4601 [ 63.460343] page dumped because: kasan: bad access detected [ 63.460983] [ 63.461190] Memory state around the buggy address: [ 63.461758] ffff88800c9ed200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 63.462581] ffff88800c9ed280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 63.463395] >ffff88800c9ed300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 63.464225] ^ [ 63.464695] ffff88800c9ed380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 63.465520] ffff88800c9ed400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 63.466366] ================================================================== [ 63.467266] Disabling lock debugging due to kernel taint [ 65.527745] BUG: Bad rss-counter state mm:00000000361f2435 type:MM_FILEPAGES val:33 [ 65.528962] BUG: Bad rss-counter state mm:00000000361f2435 type:MM_ANONPAGES val:22 [ 65.897322] BUG: Bad rss-counter state mm:00000000a2a13cfd type:MM_FILEPAGES val:33 [ 65.898323] BUG: Bad rss-counter state mm:00000000a2a13cfd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55737' (ECDSA) to the list of known hosts. 2023/06/20 01:47:49 fuzzer started 2023/06/20 01:47:49 dialing manager at localhost:44161 2023/06/20 01:47:49 checking machine... 2023/06/20 01:47:49 checking revisions... [ 66.643403] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:47:49 testing simple program... [ 66.694430] cgroup: Unknown subsys name 'net' [ 66.730797] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:47:46 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81efd9c0 RDI=ffff888006acd5b4 RBP=ffff888006acd1c0 RSP=ffff888014727410 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff888006acd1c0 R13=0000000000000008 R14=000000000000004c R15=ffff8880147274b8 RIP=ffffffff813744d5 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 00007f2fb342f900 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=00007f5c1d053650 CR3=000000000e8bc000 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=9882be6479701b8600000000000ae988 XMM05=80202152c7eea95d0000000000135dc0 XMM06=13e856d8d71426c80000000000134bb0 XMM07=fb795ef6d657705600000000001251d8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000035 RCX=ffffffff837264f5 RDX=0000000000000036 RSI=0000000000000082 RDI=0000000000000005 RBP=0000000000000036 RSP=ffff88801987f7b8 R8 =0000000000000005 R9 =0000000000000082 R10=0000000000000036 R11=00000000000b6996 R12=000000000000000a R13=ffffffff87f96c88 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c01d0 RFL=00000293 [--S-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 00007f5c1ca9e900 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=00007f5c1d055618 CR3=000000000ed4a000 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