[ 25.551754] BUG: Bad rss-counter state mm:0000000096b57bed type:MM_FILEPAGES val:33 [ 25.553178] BUG: Bad rss-counter state mm:0000000096b57bed type:MM_ANONPAGES val:22 [ 25.661671] ================================================================== [ 25.662632] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.663581] Read of size 8 at addr ffff88800e147058 by task sshd/218 [ 25.664462] [ 25.664681] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.665543] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.666548] Call Trace: [ 25.666876] [ 25.667161] dump_stack_lvl+0x91/0xf0 [ 25.667659] print_report+0xcc/0x620 [ 25.668146] ? __virt_addr_valid+0x102/0x340 [ 25.668699] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.669316] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.669989] kasan_report+0xbe/0xf0 [ 25.670465] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.671095] vma_interval_tree_remove+0xc75/0xec0 [ 25.671700] vma_prepare+0xc54/0x11a0 [ 25.672183] __split_vma+0x5af/0x950 [ 25.672668] ? __pfx___split_vma+0x10/0x10 [ 25.673196] ? find_held_lock+0x2c/0x110 [ 25.673742] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.674302] ? lock_is_held_type+0x9f/0x120 [ 25.674842] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.675441] ? mtree_range_walk+0x632/0x900 [ 25.675988] ? mas_walk+0x5c7/0x7c0 [ 25.676469] do_vmi_munmap+0x1f1/0x2b0 [ 25.676968] mmap_region+0x1f9/0x2660 [ 25.677452] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.677996] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.678707] ? __pfx_lock_acquire+0x10/0x10 [ 25.679242] ? __pfx_mmap_region+0x10/0x10 [ 25.679775] ? security_mmap_addr+0x7d/0xa0 [ 25.680313] ? get_unmapped_area+0x1f5/0x3f0 [ 25.680857] do_mmap+0x854/0xf00 [ 25.681294] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.681835] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.682395] ksys_mmap_pgoff+0x3af/0x500 [ 25.682906] do_syscall_64+0x3f/0x90 [ 25.683386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.684031] RIP: 0033:0x7f8cdcf74d82 [ 25.684488] 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 [ 25.686625] RSP: 002b:00007ffd703f1688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.687528] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8cdcf74d82 [ 25.688377] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8cdc3ae000 [ 25.689222] RBP: 00007f8cdc3ae000 R08: 0000000000000009 R09: 0000000000001000 [ 25.690096] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ba9dedec0 [ 25.690940] R13: 00007ffd703f16a0 R14: 00007ffd703f16d0 R15: 00007ffd703f1a30 [ 25.691798] [ 25.692091] [ 25.692306] Allocated by task 211: [ 25.692734] kasan_save_stack+0x22/0x50 [ 25.693236] kasan_set_track+0x25/0x30 [ 25.693771] __kasan_slab_alloc+0x59/0x70 [ 25.694293] kmem_cache_alloc+0x16b/0x370 [ 25.694810] vm_area_dup+0x20/0x160 [ 25.695265] __split_vma+0x170/0x950 [ 25.695727] split_vma+0xc6/0x110 [ 25.696165] mprotect_fixup+0x8d2/0xb30 [ 25.696665] do_mprotect_pkey+0x87e/0xd40 [ 25.697178] __x64_sys_mprotect+0x78/0xc0 [ 25.697724] do_syscall_64+0x3f/0x90 [ 25.698195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.698834] [ 25.699051] Freed by task 211: [ 25.699440] kasan_save_stack+0x22/0x50 [ 25.699945] kasan_set_track+0x25/0x30 [ 25.700437] kasan_save_free_info+0x2b/0x50 [ 25.700970] __kasan_slab_free+0x10a/0x190 [ 25.701503] kmem_cache_free+0x10d/0x4d0 [ 25.702040] rcu_core+0x8c8/0x2860 [ 25.702492] __do_softirq+0x1b7/0x7d4 [ 25.702971] [ 25.703204] Last potentially related work creation: [ 25.703787] kasan_save_stack+0x22/0x50 [ 25.704284] __kasan_record_aux_stack+0x8e/0xa0 [ 25.704858] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.705503] remove_vma+0x139/0x170 [ 25.705995] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.706550] do_vmi_munmap+0x1f1/0x2b0 [ 25.707031] __vm_munmap+0x138/0x3a0 [ 25.707495] __x64_sys_munmap+0x59/0x80 [ 25.707988] do_syscall_64+0x3f/0x90 [ 25.708457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.709097] [ 25.709313] The buggy address belongs to the object at ffff88800e147000 [ 25.709313] which belongs to the cache vm_area_struct of size 168 [ 25.710794] The buggy address is located 88 bytes inside of [ 25.710794] freed 168-byte region [ffff88800e147000, ffff88800e1470a8) [ 25.712187] [ 25.712405] The buggy address belongs to the physical page: [ 25.713065] page:0000000011287f66 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe147 [ 25.714179] memcg:ffff88800d992c01 [ 25.714606] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.715304] page_type: 0xffffffff() [ 25.715759] raw: 0100000000000200 ffff88800879fc80 ffffea00005a1440 dead000000000003 [ 25.716670] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d992c01 [ 25.717568] page dumped because: kasan: bad access detected [ 25.718269] [ 25.718487] Memory state around the buggy address: [ 25.719068] ffff88800e146f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.719918] ffff88800e146f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.720764] >ffff88800e147000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.721610] ^ [ 25.722381] ffff88800e147080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 25.723240] ffff88800e147100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.724087] ================================================================== [ 25.725061] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.493741] BUG: Bad rss-counter state mm:00000000a94a2f87 type:MM_FILEPAGES val:33 [ 27.494730] BUG: Bad rss-counter state mm:00000000a94a2f87 type:MM_ANONPAGES val:22 [ 27.952801] BUG: Bad rss-counter state mm:0000000027473327 type:MM_FILEPAGES val:33 [ 27.953816] BUG: Bad rss-counter state mm:0000000027473327 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56252' (ECDSA) to the list of known hosts. 2023/06/20 07:46:12 fuzzer started 2023/06/20 07:46:12 dialing manager at localhost:44161 2023/06/20 07:46:12 checking machine... 2023/06/20 07:46:12 checking revisions... [ 28.678435] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:46:12 testing simple program... [ 28.731211] cgroup: Unknown subsys name 'net' [ 28.773349] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:46:10 Registers: info registers vcpu 0 RAX=0000000000001000 RBX=0000000000000000 RCX=0000000000001a00 RDX=00000000000019c0 RSI=0000000000002000 RDI=00000000000019c0 RBP=ffff888017d476e8 RSP=ffff888017d47690 R8 =ffff888017d4c000 R9 =000000000003d180 R10=0000000000001140 R11=00000000000b6996 R12=ffff888008442280 R13=00000000000928c0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180ad9c 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 00007f992c178900 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=00007ffe61cf1000 CR3=000000001ca26000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fddb19f8d10 CR3=000000000f60e000 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=52a076d53a2e2881174156498fb74190 XMM02=000000000011c5b8eff9b2d0a8fce9cb XMM03=000000000011c6882c67c8bc2e329bc3 XMM04=2be927e672485cb900000000000ae988 XMM05=751b9502027dc0b90000000000132cf0 XMM06=749aaaaa89c859710000000000131760 XMM07=e042d86d42eb936e0000000000123730 XMM08=375fa1da621ce64d000000000011c688 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000