[ 24.205568] sshd (211) used greatest stack depth: 23992 bytes left [ 24.206707] BUG: Bad rss-counter state mm:00000000ca074741 type:MM_FILEPAGES val:33 [ 24.207763] BUG: Bad rss-counter state mm:00000000ca074741 type:MM_ANONPAGES val:22 [ 24.380664] ================================================================== [ 24.381576] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.382521] Read of size 8 at addr ffff88800e2c0b38 by task sshd/218 [ 24.383416] [ 24.383641] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.384511] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.385506] Call Trace: [ 24.385844] [ 24.386125] dump_stack_lvl+0x91/0xf0 [ 24.386624] print_report+0xcc/0x620 [ 24.387128] ? __virt_addr_valid+0x102/0x340 [ 24.387688] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.388310] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.388931] kasan_report+0xbe/0xf0 [ 24.389413] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.390033] vma_interval_tree_remove+0xc75/0xec0 [ 24.390645] vma_prepare+0xc54/0x11a0 [ 24.391130] __split_vma+0x5af/0x950 [ 24.391600] ? __pfx___split_vma+0x10/0x10 [ 24.392130] ? find_held_lock+0x2c/0x110 [ 24.392658] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.393222] ? lock_is_held_type+0x9f/0x120 [ 24.393759] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.394376] ? mtree_range_walk+0x632/0x900 [ 24.394955] ? mas_walk+0x5c7/0x7c0 [ 24.395432] do_vmi_munmap+0x1f1/0x2b0 [ 24.395922] mmap_region+0x1f9/0x2660 [ 24.396410] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.396924] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.397644] ? __pfx_lock_acquire+0x10/0x10 [ 24.398181] ? __pfx_mmap_region+0x10/0x10 [ 24.398714] ? security_mmap_addr+0x7d/0xa0 [ 24.399262] ? get_unmapped_area+0x1f5/0x3f0 [ 24.399818] do_mmap+0x854/0xf00 [ 24.400261] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.400756] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.401322] ksys_mmap_pgoff+0x3af/0x500 [ 24.401831] do_syscall_64+0x3f/0x90 [ 24.402312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.402984] RIP: 0033:0x7f46a285dd82 [ 24.403445] 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 [ 24.405599] RSP: 002b:00007ffd9f49fa78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.406504] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f46a285dd82 [ 24.407363] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f46a1c97000 [ 24.408217] RBP: 00007f46a1c97000 R08: 0000000000000009 R09: 0000000000001000 [ 24.409060] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559cd270aec0 [ 24.409912] R13: 00007ffd9f49fa90 R14: 00007ffd9f49fac0 R15: 00007ffd9f49fe20 [ 24.410792] [ 24.411087] [ 24.411301] Allocated by task 211: [ 24.411735] kasan_save_stack+0x22/0x50 [ 24.412246] kasan_set_track+0x25/0x30 [ 24.412745] __kasan_slab_alloc+0x59/0x70 [ 24.413268] kmem_cache_alloc+0x16b/0x370 [ 24.413785] vm_area_dup+0x20/0x160 [ 24.414236] __split_vma+0x170/0x950 [ 24.414701] split_vma+0xc6/0x110 [ 24.415153] mprotect_fixup+0x8d2/0xb30 [ 24.415657] do_mprotect_pkey+0x87e/0xd40 [ 24.416179] __x64_sys_mprotect+0x78/0xc0 [ 24.416705] do_syscall_64+0x3f/0x90 [ 24.417180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.417826] [ 24.418045] Freed by task 13: [ 24.418430] kasan_save_stack+0x22/0x50 [ 24.418940] kasan_set_track+0x25/0x30 [ 24.419432] kasan_save_free_info+0x2b/0x50 [ 24.419969] __kasan_slab_free+0x10a/0x190 [ 24.420499] kmem_cache_free+0x10d/0x4d0 [ 24.421047] rcu_core+0x8c8/0x2860 [ 24.421519] __do_softirq+0x1b7/0x7d4 [ 24.422012] [ 24.422228] Last potentially related work creation: [ 24.422832] kasan_save_stack+0x22/0x50 [ 24.423343] __kasan_record_aux_stack+0x8e/0xa0 [ 24.423919] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.424567] remove_vma+0x139/0x170 [ 24.425020] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.425581] do_vmi_munmap+0x1f1/0x2b0 [ 24.426063] __vm_munmap+0x138/0x3a0 [ 24.426536] __x64_sys_munmap+0x59/0x80 [ 24.427051] do_syscall_64+0x3f/0x90 [ 24.427539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.428206] [ 24.428427] Second to last potentially related work creation: [ 24.429125] kasan_save_stack+0x22/0x50 [ 24.429636] __kasan_record_aux_stack+0x8e/0xa0 [ 24.430216] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.430889] remove_vma+0x139/0x170 [ 24.431344] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.431940] do_vmi_munmap+0x1f1/0x2b0 [ 24.432453] mmap_region+0x1f9/0x2660 [ 24.432955] do_mmap+0x854/0xf00 [ 24.433403] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.433905] ksys_mmap_pgoff+0x3af/0x500 [ 24.434424] do_syscall_64+0x3f/0x90 [ 24.434932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.435610] [ 24.435834] The buggy address belongs to the object at ffff88800e2c0ae0 [ 24.435834] which belongs to the cache vm_area_struct of size 168 [ 24.437386] The buggy address is located 88 bytes inside of [ 24.437386] freed 168-byte region [ffff88800e2c0ae0, ffff88800e2c0b88) [ 24.438908] [ 24.439132] The buggy address belongs to the physical page: [ 24.439842] page:00000000b78fb4aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2c0 [ 24.441009] memcg:ffff88800f4bdb01 [ 24.441452] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.442135] page_type: 0xffffffff() [ 24.442621] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b5c00 000000000000000a [ 24.443603] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f4bdb01 [ 24.444554] page dumped because: kasan: bad access detected [ 24.445240] [ 24.445464] Memory state around the buggy address: [ 24.446079] ffff88800e2c0a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.447014] ffff88800e2c0a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 24.447929] >ffff88800e2c0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.448826] ^ [ 24.449473] ffff88800e2c0b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 24.450370] ffff88800e2c0c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.451278] ================================================================== [ 24.452407] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.523037] BUG: Bad rss-counter state mm:00000000196706fb type:MM_FILEPAGES val:33 [ 26.524360] BUG: Bad rss-counter state mm:00000000196706fb type:MM_ANONPAGES val:22 [ 26.894573] BUG: Bad rss-counter state mm:00000000f137a359 type:MM_FILEPAGES val:33 [ 26.896439] BUG: Bad rss-counter state mm:00000000f137a359 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7397' (ECDSA) to the list of known hosts. 2023/06/21 10:47:39 fuzzer started 2023/06/21 10:47:39 dialing manager at localhost:36067 2023/06/21 10:47:39 checking machine... 2023/06/21 10:47:39 checking revisions... [ 27.561195] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:47:39 testing simple program... [ 27.612099] cgroup: Unknown subsys name 'net' [ 27.662898] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:47:39 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=00007f70d2d0c2e0 CR3=0000000009890000 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=75150888cd3d0cb729445e9587754e93 XMM02=ec2efd57dc4c00df000000000011d968 XMM03=37cb71d72a4eae87000000000011da38 XMM04=639cc4a0d91982e500000000000ae988 XMM05=66b297ddaa7e3b6a0000000000135898 XMM06=751b9502027dc0b900000000001340f0 XMM07=fb795ef6d65770560000000000123848 XMM08=2c67c8bc2e329bc3000000000011d9d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000c04d8136 RBX=000000004564eaca RCX=ffff888018217a6c RDX=000000000000000c RSI=0000000000000015 RDI=00000000f6081c4c RBP=ffff8880087b8500 RSP=ffff8880182179f8 R8 =00000000a32645d0 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000cc0 R14=ffff888018217a60 R15=000000000000000c RIP=ffffffff8227047c RFL=00000296 [--S-AP-] 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 00007f7acae7c900 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=00007f7acb433618 CR3=000000000e968000 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