[ 24.070603] BUG: Bad rss-counter state mm:00000000f41b2bfa type:MM_FILEPAGES val:33 [ 24.071926] BUG: Bad rss-counter state mm:00000000f41b2bfa type:MM_ANONPAGES val:22 [ 24.236423] ================================================================== [ 24.237309] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.238224] Read of size 8 at addr ffff88800e5df310 by task sshd/219 [ 24.238970] [ 24.239181] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.240119] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.241060] Call Trace: [ 24.241367] [ 24.241666] dump_stack_lvl+0x91/0xf0 [ 24.242149] print_report+0xcc/0x620 [ 24.242620] ? __virt_addr_valid+0x102/0x340 [ 24.243160] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.243752] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.244347] kasan_report+0xbe/0xf0 [ 24.244805] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.245408] vma_interval_tree_remove+0xc75/0xec0 [ 24.245991] vma_prepare+0xc54/0x11a0 [ 24.246461] __split_vma+0x5af/0x950 [ 24.246921] ? __pfx___split_vma+0x10/0x10 [ 24.247454] ? find_held_lock+0x2c/0x110 [ 24.247959] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.248506] ? lock_is_held_type+0x9f/0x120 [ 24.249033] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.249619] ? mtree_range_walk+0x632/0x900 [ 24.250182] ? mas_walk+0x5c7/0x7c0 [ 24.250645] do_vmi_munmap+0x1f1/0x2b0 [ 24.251122] mmap_region+0x1f9/0x2660 [ 24.251589] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.252089] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.252781] ? __pfx_lock_acquire+0x10/0x10 [ 24.253298] ? __pfx_mmap_region+0x10/0x10 [ 24.253819] ? security_mmap_addr+0x7d/0xa0 [ 24.254341] ? get_unmapped_area+0x1f5/0x3f0 [ 24.254881] do_mmap+0x854/0xf00 [ 24.255307] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.255785] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.256332] ksys_mmap_pgoff+0x3af/0x500 [ 24.256821] do_syscall_64+0x3f/0x90 [ 24.257284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.257910] RIP: 0033:0x7f0cdc479d82 [ 24.258373] 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 [ 24.260420] RSP: 002b:00007ffff7373128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.261295] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0cdc479d82 [ 24.262131] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0cdb8b3000 [ 24.262946] RBP: 00007f0cdb8b3000 R08: 0000000000000009 R09: 0000000000001000 [ 24.263760] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a335d22ec0 [ 24.264579] R13: 00007ffff7373140 R14: 00007ffff7373170 R15: 00007ffff73734d0 [ 24.265411] [ 24.265694] [ 24.265903] Allocated by task 212: [ 24.266327] kasan_save_stack+0x22/0x50 [ 24.266813] kasan_set_track+0x25/0x30 [ 24.267291] __kasan_slab_alloc+0x59/0x70 [ 24.267799] kmem_cache_alloc+0x16b/0x370 [ 24.268298] vm_area_dup+0x20/0x160 [ 24.268736] __split_vma+0x170/0x950 [ 24.269195] split_vma+0xc6/0x110 [ 24.269621] mprotect_fixup+0x8d2/0xb30 [ 24.270120] do_mprotect_pkey+0x87e/0xd40 [ 24.270629] __x64_sys_mprotect+0x78/0xc0 [ 24.271140] do_syscall_64+0x3f/0x90 [ 24.271605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.272227] [ 24.272439] Freed by task 203: [ 24.272820] kasan_save_stack+0x22/0x50 [ 24.273307] kasan_set_track+0x25/0x30 [ 24.273789] kasan_save_free_info+0x2b/0x50 [ 24.274311] __kasan_slab_free+0x10a/0x190 [ 24.274829] kmem_cache_free+0x10d/0x4d0 [ 24.275327] rcu_core+0x8c8/0x2860 [ 24.275759] __do_softirq+0x1b7/0x7d4 [ 24.276224] [ 24.276436] Last potentially related work creation: [ 24.277005] kasan_save_stack+0x22/0x50 [ 24.277493] __kasan_record_aux_stack+0x8e/0xa0 [ 24.278054] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.278698] remove_vma+0x139/0x170 [ 24.279272] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.279830] do_vmi_munmap+0x1f1/0x2b0 [ 24.280321] __vm_munmap+0x138/0x3a0 [ 24.280791] __x64_sys_munmap+0x59/0x80 [ 24.281289] do_syscall_64+0x3f/0x90 [ 24.281767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.282426] [ 24.282642] Second to last potentially related work creation: [ 24.283328] kasan_save_stack+0x22/0x50 [ 24.283836] __kasan_record_aux_stack+0x8e/0xa0 [ 24.284411] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.285058] remove_vma+0x139/0x170 [ 24.285505] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.286060] do_vmi_munmap+0x1f1/0x2b0 [ 24.286565] mmap_region+0x1f9/0x2660 [ 24.287046] do_mmap+0x854/0xf00 [ 24.287476] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.287968] ksys_mmap_pgoff+0x3af/0x500 [ 24.288469] do_syscall_64+0x3f/0x90 [ 24.288947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.289597] [ 24.289809] The buggy address belongs to the object at ffff88800e5df2b8 [ 24.289809] which belongs to the cache vm_area_struct of size 168 [ 24.291283] The buggy address is located 88 bytes inside of [ 24.291283] freed 168-byte region [ffff88800e5df2b8, ffff88800e5df360) [ 24.292702] [ 24.292919] The buggy address belongs to the physical page: [ 24.293582] page:00000000565e13cc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5df [ 24.294668] memcg:ffff88800ddd1101 [ 24.295104] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.295801] page_type: 0xffffffff() [ 24.296250] raw: 0100000000000200 ffff8880087a0c80 ffffea0000393680 dead000000000007 [ 24.297162] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddd1101 [ 24.298055] page dumped because: kasan: bad access detected [ 24.298727] [ 24.298943] Memory state around the buggy address: [ 24.299516] ffff88800e5df200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.300369] ffff88800e5df280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.301214] >ffff88800e5df300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.302051] ^ [ 24.302528] ffff88800e5df380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.303386] ffff88800e5df400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.304223] ================================================================== [ 24.305638] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.978384] BUG: Bad rss-counter state mm:0000000096b58218 type:MM_FILEPAGES val:33 [ 25.979165] BUG: Bad rss-counter state mm:0000000096b58218 type:MM_ANONPAGES val:22 [ 26.448894] BUG: Bad rss-counter state mm:000000003e23e63c type:MM_FILEPAGES val:33 [ 26.450220] BUG: Bad rss-counter state mm:000000003e23e63c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1503' (ECDSA) to the list of known hosts. 2023/06/21 07:37:56 fuzzer started 2023/06/21 07:37:56 dialing manager at localhost:36067 2023/06/21 07:37:56 checking machine... 2023/06/21 07:37:56 checking revisions... [ 27.172690] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:37:56 testing simple program... [ 27.224282] cgroup: Unknown subsys name 'net' [ 27.328081] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:37:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015de8000 RSI=ffffffff836622a3 RDI=0000000000000000 RBP=ffff888015f3f7a8 RSP=ffff888015f3f730 R8 =0000000066563828 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00000000000128c0 R13=00000000ffffffff R14=ffff888014230000 R15=0000000000002000 RIP=ffffffff836622a3 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 00007f6d6b935900 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=00007f6d6beec618 CR3=000000001a738000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f802d214550 CR3=000000000c70c000 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=2035353a37333a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a37333a3730203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000