[ 32.554627] BUG: Bad rss-counter state mm:00000000f936e199 type:MM_FILEPAGES val:33 [ 32.555477] BUG: Bad rss-counter state mm:00000000f936e199 type:MM_ANONPAGES val:22 [ 32.681222] ================================================================== [ 32.681944] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.682678] Read of size 8 at addr ffff88800f133a50 by task sshd/220 [ 32.683266] [ 32.683436] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.684098] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.684847] Call Trace: [ 32.685221] [ 32.685438] dump_stack_lvl+0x91/0xf0 [ 32.685811] print_report+0xcc/0x620 [ 32.686174] ? __virt_addr_valid+0x102/0x340 [ 32.686595] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.687062] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.687548] kasan_report+0xbe/0xf0 [ 32.687910] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.688383] vma_interval_tree_remove+0xc75/0xec0 [ 32.688846] vma_prepare+0xc54/0x11a0 [ 32.689212] __split_vma+0x5af/0x950 [ 32.689574] ? __pfx___split_vma+0x10/0x10 [ 32.689976] ? find_held_lock+0x2c/0x110 [ 32.690376] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.690807] ? lock_is_held_type+0x9f/0x120 [ 32.691220] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.691684] ? mtree_range_walk+0x632/0x900 [ 32.692102] ? mas_walk+0x5c7/0x7c0 [ 32.692463] do_vmi_munmap+0x1f1/0x2b0 [ 32.692845] mmap_region+0x1f9/0x2660 [ 32.693213] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.693604] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.694157] ? __pfx_lock_acquire+0x10/0x10 [ 32.694566] ? __pfx_mmap_region+0x10/0x10 [ 32.694973] ? security_mmap_addr+0x7d/0xa0 [ 32.695378] ? get_unmapped_area+0x1f5/0x3f0 [ 32.695803] do_mmap+0x854/0xf00 [ 32.696138] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.696515] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.696962] ksys_mmap_pgoff+0x3af/0x500 [ 32.697346] do_syscall_64+0x3f/0x90 [ 32.697708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.698199] RIP: 0033:0x7ffb324ead82 [ 32.698548] 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 [ 32.700179] RSP: 002b:00007ffd72abf688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.700891] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb324ead82 [ 32.701536] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb31924000 [ 32.702188] RBP: 00007ffb31924000 R08: 0000000000000009 R09: 0000000000001000 [ 32.702846] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559628961f70 [ 32.703490] R13: 00007ffd72abf6a0 R14: 00007ffd72abf6d0 R15: 00007ffd72abfa30 [ 32.704140] [ 32.704365] [ 32.704529] Allocated by task 213: [ 32.704872] kasan_save_stack+0x22/0x50 [ 32.705260] kasan_set_track+0x25/0x30 [ 32.705633] __kasan_slab_alloc+0x59/0x70 [ 32.706032] kmem_cache_alloc+0x16b/0x370 [ 32.706425] vm_area_dup+0x20/0x160 [ 32.706769] __split_vma+0x170/0x950 [ 32.707124] split_vma+0xc6/0x110 [ 32.707460] mprotect_fixup+0x8d2/0xb30 [ 32.707837] do_mprotect_pkey+0x87e/0xd40 [ 32.708235] __x64_sys_mprotect+0x78/0xc0 [ 32.708629] do_syscall_64+0x3f/0x90 [ 32.709003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.709493] [ 32.709655] Freed by task 204: [ 32.709956] kasan_save_stack+0x22/0x50 [ 32.710342] kasan_set_track+0x25/0x30 [ 32.710712] kasan_save_free_info+0x2b/0x50 [ 32.711120] __kasan_slab_free+0x10a/0x190 [ 32.711525] kmem_cache_free+0x10d/0x4d0 [ 32.711918] rcu_core+0x8c8/0x2860 [ 32.712260] __do_softirq+0x1b7/0x7d4 [ 32.712621] [ 32.712793] Last potentially related work creation: [ 32.713241] kasan_save_stack+0x22/0x50 [ 32.713621] __kasan_record_aux_stack+0x8e/0xa0 [ 32.714055] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.714548] remove_vma+0x139/0x170 [ 32.714894] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.715322] do_vmi_munmap+0x1f1/0x2b0 [ 32.715693] __vm_munmap+0x138/0x3a0 [ 32.716046] __x64_sys_munmap+0x59/0x80 [ 32.716421] do_syscall_64+0x3f/0x90 [ 32.716799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.717286] [ 32.717450] Second to last potentially related work creation: [ 32.717974] kasan_save_stack+0x22/0x50 [ 32.718357] __kasan_record_aux_stack+0x8e/0xa0 [ 32.718793] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.719278] remove_vma+0x139/0x170 [ 32.719624] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.720043] do_vmi_munmap+0x1f1/0x2b0 [ 32.720413] mmap_region+0x1f9/0x2660 [ 32.720784] do_mmap+0x854/0xf00 [ 32.721114] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.721486] ksys_mmap_pgoff+0x3af/0x500 [ 32.721867] do_syscall_64+0x3f/0x90 [ 32.722224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.722713] [ 32.722877] The buggy address belongs to the object at ffff88800f1339f8 [ 32.722877] which belongs to the cache vm_area_struct of size 168 [ 32.723996] The buggy address is located 88 bytes inside of [ 32.723996] freed 168-byte region [ffff88800f1339f8, ffff88800f133aa0) [ 32.725078] [ 32.725242] The buggy address belongs to the physical page: [ 32.725745] page:000000001711c756 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf133 [ 32.726571] memcg:ffff88800fb5ef01 [ 32.726893] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.727425] page_type: 0xffffffff() [ 32.727763] raw: 0100000000000200 ffff88800879fc80 0000000000000000 0000000000000001 [ 32.728459] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb5ef01 [ 32.729150] page dumped because: kasan: bad access detected [ 32.729647] [ 32.729807] Memory state around the buggy address: [ 32.730242] ffff88800f133900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.730891] ffff88800f133980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.731538] >ffff88800f133a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.732183] ^ [ 32.732722] ffff88800f133a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 32.733373] ffff88800f133b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.734008] ================================================================== [ 32.734986] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.532879] BUG: Bad rss-counter state mm:000000000985f4f7 type:MM_FILEPAGES val:33 [ 34.534062] BUG: Bad rss-counter state mm:000000000985f4f7 type:MM_ANONPAGES val:22 [ 34.932214] BUG: Bad rss-counter state mm:0000000031b6806c type:MM_FILEPAGES val:33 [ 34.933465] BUG: Bad rss-counter state mm:0000000031b6806c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55844' (ECDSA) to the list of known hosts. 2023/06/19 18:54:13 fuzzer started 2023/06/19 18:54:13 dialing manager at localhost:44161 2023/06/19 18:54:13 checking machine... 2023/06/19 18:54:13 checking revisions... [ 35.661210] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:54:14 testing simple program... [ 35.719058] cgroup: Unknown subsys name 'net' [ 35.769206] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:54:04 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffc84ceffb8 CR3=0000000005482000 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=00007fa655cdd510000055e319730790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801654b680 RSI=ffffffff83ab4224 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800fd274e8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000c2000000c20 R12=0000000000000000 R13=0000000000000074 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff8137446a 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 00007fec09d9b900 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=00007fec0a352618 CR3=000000000e99c000 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