[ 41.698086] BUG: Bad rss-counter state mm:000000000ca08e44 type:MM_FILEPAGES val:33 [ 41.699516] BUG: Bad rss-counter state mm:000000000ca08e44 type:MM_ANONPAGES val:22 [ 41.846028] ================================================================== [ 41.846973] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.847908] Read of size 8 at addr ffff88800d618df0 by task sshd/218 [ 41.848773] [ 41.849050] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.849926] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.850958] Call Trace: [ 41.851285] [ 41.851574] dump_stack_lvl+0x91/0xf0 [ 41.852068] print_report+0xcc/0x620 [ 41.852552] ? __virt_addr_valid+0x102/0x340 [ 41.853102] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.853730] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.854349] kasan_report+0xbe/0xf0 [ 41.854835] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.855469] vma_interval_tree_remove+0xc75/0xec0 [ 41.856088] vma_prepare+0xc54/0x11a0 [ 41.856575] __split_vma+0x5af/0x950 [ 41.857045] ? __pfx___split_vma+0x10/0x10 [ 41.857595] ? find_held_lock+0x2c/0x110 [ 41.858131] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.858718] ? lock_is_held_type+0x9f/0x120 [ 41.859280] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.859899] ? mtree_range_walk+0x632/0x900 [ 41.860453] ? mas_walk+0x5c7/0x7c0 [ 41.860933] do_vmi_munmap+0x1f1/0x2b0 [ 41.861428] mmap_region+0x1f9/0x2660 [ 41.861915] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.862431] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.863157] ? __pfx_lock_acquire+0x10/0x10 [ 41.863689] ? __pfx_mmap_region+0x10/0x10 [ 41.864228] ? security_mmap_addr+0x7d/0xa0 [ 41.864761] ? get_unmapped_area+0x1f5/0x3f0 [ 41.865311] do_mmap+0x854/0xf00 [ 41.865753] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.866251] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.866824] ksys_mmap_pgoff+0x3af/0x500 [ 41.867336] do_syscall_64+0x3f/0x90 [ 41.867813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.868459] RIP: 0033:0x7f544dac9d82 [ 41.868917] 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 [ 41.871083] RSP: 002b:00007ffe45d53158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.871985] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f544dac9d82 [ 41.872837] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f544cf03000 [ 41.873685] RBP: 00007f544cf03000 R08: 0000000000000009 R09: 0000000000001000 [ 41.874542] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e5f0cf6ec0 [ 41.875394] R13: 00007ffe45d53170 R14: 00007ffe45d531a0 R15: 00007ffe45d53500 [ 41.876249] [ 41.876543] [ 41.876757] Allocated by task 211: [ 41.877191] kasan_save_stack+0x22/0x50 [ 41.877697] kasan_set_track+0x25/0x30 [ 41.878190] __kasan_slab_alloc+0x59/0x70 [ 41.878718] kmem_cache_alloc+0x16b/0x370 [ 41.879250] vm_area_dup+0x20/0x160 [ 41.879708] __split_vma+0x170/0x950 [ 41.880175] split_vma+0xc6/0x110 [ 41.880617] mprotect_fixup+0x8d2/0xb30 [ 41.881122] do_mprotect_pkey+0x87e/0xd40 [ 41.881648] __x64_sys_mprotect+0x78/0xc0 [ 41.882173] do_syscall_64+0x3f/0x90 [ 41.882646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.883309] [ 41.883527] Freed by task 211: [ 41.883920] kasan_save_stack+0x22/0x50 [ 41.884424] kasan_set_track+0x25/0x30 [ 41.884918] kasan_save_free_info+0x2b/0x50 [ 41.885445] __kasan_slab_free+0x10a/0x190 [ 41.885976] kmem_cache_free+0x10d/0x4d0 [ 41.886491] rcu_core+0x8c8/0x2860 [ 41.886947] __do_softirq+0x1b7/0x7d4 [ 41.887421] [ 41.887638] Last potentially related work creation: [ 41.888228] kasan_save_stack+0x22/0x50 [ 41.888731] __kasan_record_aux_stack+0x8e/0xa0 [ 41.889314] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.889958] remove_vma+0x139/0x170 [ 41.890436] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.891010] do_vmi_munmap+0x1f1/0x2b0 [ 41.891496] __vm_munmap+0x138/0x3a0 [ 41.891964] __x64_sys_munmap+0x59/0x80 [ 41.892462] do_syscall_64+0x3f/0x90 [ 41.892932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.893580] [ 41.893802] Second to last potentially related work creation: [ 41.894490] kasan_save_stack+0x22/0x50 [ 41.895016] __kasan_record_aux_stack+0x8e/0xa0 [ 41.895601] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.896251] remove_vma+0x139/0x170 [ 41.896703] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.897261] do_vmi_munmap+0x1f1/0x2b0 [ 41.897745] mmap_region+0x1f9/0x2660 [ 41.898221] do_mmap+0x854/0xf00 [ 41.898653] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.899160] ksys_mmap_pgoff+0x3af/0x500 [ 41.899666] do_syscall_64+0x3f/0x90 [ 41.900141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.900787] [ 41.901000] The buggy address belongs to the object at ffff88800d618d98 [ 41.901000] which belongs to the cache vm_area_struct of size 168 [ 41.902462] The buggy address is located 88 bytes inside of [ 41.902462] freed 168-byte region [ffff88800d618d98, ffff88800d618e40) [ 41.903889] [ 41.904104] The buggy address belongs to the physical page: [ 41.904766] page:000000007a095455 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd618 [ 41.905854] memcg:ffff88800f316901 [ 41.906308] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.906968] page_type: 0xffffffff() [ 41.907416] raw: 0100000000000200 ffff88800879fc80 ffffea00002cf840 dead000000000008 [ 41.908333] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f316901 [ 41.909238] page dumped because: kasan: bad access detected [ 41.909902] [ 41.910117] Memory state around the buggy address: [ 41.910710] ffff88800d618c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 41.911571] ffff88800d618d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 41.912426] >ffff88800d618d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 41.913275] ^ [ 41.914090] ffff88800d618e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 41.914971] ffff88800d618e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.915833] ================================================================== [ 41.916826] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 44.276997] BUG: Bad rss-counter state mm:00000000eae24f66 type:MM_FILEPAGES val:33 [ 44.278575] BUG: Bad rss-counter state mm:00000000eae24f66 type:MM_ANONPAGES val:22 [ 44.867452] BUG: Bad rss-counter state mm:000000000b9e8d5e type:MM_FILEPAGES val:33 [ 44.868613] BUG: Bad rss-counter state mm:000000000b9e8d5e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31716' (ECDSA) to the list of known hosts. 2023/06/19 16:56:44 fuzzer started 2023/06/19 16:56:45 dialing manager at localhost:44161 2023/06/19 16:56:45 checking machine... 2023/06/19 16:56:45 checking revisions... [ 45.588436] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:56:45 testing simple program... [ 45.638905] cgroup: Unknown subsys name 'net' [ 45.685426] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:56:27 Registers: info registers vcpu 0 RAX=000000000000003f RBX=000056401a5a13f0 RCX=00007fff0c13ea38 RDX=00007fff0c13ea40 RSI=0000000000000000 RDI=000056401a5a13f0 RBP=0000000000000008 RSP=00007fff0c13ea20 R8 =000056401a581ce0 R9 =00000000ffffffff R10=000056401a57beb0 R11=0000000000000000 R12=000056401a5a13f0 R13=00007fff0c13eaf0 R14=000056401a5a4480 R15=00007fff0c13eaf0 RIP=00007f10406c2101 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 00007f10401e6900 00000000 00000000 GS =0000 0000000000000000 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=00007f104079e0b0 CR3=000000000f28e000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf293c0 RCX=0000000000000000 RDX=1ffff1100d9e54da RSI=ffffffff813bcf10 RDI=ffff88806cf2a6d0 RBP=0000000000000000 RSP=ffff88806cf09dd8 R8 =0000000000000007 R9 =0000000000000000 R10=ffffffffffffffff R11=00000012c7c737f0 R12=00000000fffc1998 R13=ffff88806cf2c240 R14=ffff888008e27dc8 R15=dffffc0000000000 RIP=ffffffff813bcf33 RFL=00000046 [---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 0000000000000000 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=00007fd68b1edd40 CR3=000000000d68e000 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=ee5e07be96a0da9ba5421dfe8a2755d1 XMM02=ec2efd57dc4c00df00000000001206b0 XMM03=ac297cbbfab8c7820000000000120780 XMM04=8c63e88ca86b606d00000000000ae988 XMM05=751b9502027dc0b90000000000135228 XMM06=ceba544c17f9067e0000000000134400 XMM07=e042d86d42eb936e00000000001246a0 XMM08=ac297cbbfab8c7820000000000120780 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000