[ 23.774285] BUG: Bad rss-counter state mm:000000004e67ea0c type:MM_FILEPAGES val:33 [ 23.775291] BUG: Bad rss-counter state mm:000000004e67ea0c type:MM_ANONPAGES val:22 [ 23.879933] ================================================================== [ 23.880993] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.882101] Read of size 8 at addr ffff888018023798 by task sshd/219 [ 23.883155] [ 23.883276] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.883751] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.884298] Call Trace: [ 23.884475] [ 23.884631] dump_stack_lvl+0x91/0xf0 [ 23.884918] print_report+0xcc/0x620 [ 23.885187] ? __virt_addr_valid+0x102/0x340 [ 23.885493] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.885831] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.886181] kasan_report+0xbe/0xf0 [ 23.886441] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.886785] vma_interval_tree_remove+0xc75/0xec0 [ 23.887132] vma_prepare+0xc54/0x11a0 [ 23.887396] __split_vma+0x5af/0x950 [ 23.887659] ? __pfx___split_vma+0x10/0x10 [ 23.887951] ? find_held_lock+0x2c/0x110 [ 23.888239] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.888547] ? lock_is_held_type+0x9f/0x120 [ 23.888850] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.889195] ? mtree_range_walk+0x632/0x900 [ 23.889527] ? mas_walk+0x5c7/0x7c0 [ 23.889816] do_vmi_munmap+0x1f1/0x2b0 [ 23.890116] mmap_region+0x1f9/0x2660 [ 23.890401] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.890699] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.891142] ? __pfx_lock_acquire+0x10/0x10 [ 23.891457] ? __pfx_mmap_region+0x10/0x10 [ 23.891769] ? security_mmap_addr+0x7d/0xa0 [ 23.892082] ? get_unmapped_area+0x1f5/0x3f0 [ 23.892404] do_mmap+0x854/0xf00 [ 23.892659] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.892951] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.893295] ksys_mmap_pgoff+0x3af/0x500 [ 23.893595] do_syscall_64+0x3f/0x90 [ 23.893882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.894275] RIP: 0033:0x7fad78872d82 [ 23.894543] 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 [ 23.895846] RSP: 002b:00007ffc1972b6c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.896401] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad78872d82 [ 23.896913] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad77cac000 [ 23.897427] RBP: 00007fad77cac000 R08: 0000000000000009 R09: 0000000000001000 [ 23.897926] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ac5494f70 [ 23.898442] R13: 00007ffc1972b6e0 R14: 00007ffc1972b710 R15: 00007ffc1972ba70 [ 23.898950] [ 23.899134] [ 23.899257] Allocated by task 212: [ 23.899519] kasan_save_stack+0x22/0x50 [ 23.899815] kasan_set_track+0x25/0x30 [ 23.900109] __kasan_slab_alloc+0x59/0x70 [ 23.900421] kmem_cache_alloc+0x16b/0x370 [ 23.900730] vm_area_dup+0x20/0x160 [ 23.901000] __split_vma+0x170/0x950 [ 23.901273] split_vma+0xc6/0x110 [ 23.901525] mprotect_fixup+0x8d2/0xb30 [ 23.901824] do_mprotect_pkey+0x87e/0xd40 [ 23.902131] __x64_sys_mprotect+0x78/0xc0 [ 23.902440] do_syscall_64+0x3f/0x90 [ 23.902718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.903108] [ 23.903240] Freed by task 212: [ 23.903479] kasan_save_stack+0x22/0x50 [ 23.903785] kasan_set_track+0x25/0x30 [ 23.904072] kasan_save_free_info+0x2b/0x50 [ 23.904383] __kasan_slab_free+0x10a/0x190 [ 23.904704] kmem_cache_free+0x10d/0x4d0 [ 23.905010] rcu_core+0x8c8/0x2860 [ 23.905277] __do_softirq+0x1b7/0x7d4 [ 23.905567] [ 23.905695] Last potentially related work creation: [ 23.906040] kasan_save_stack+0x22/0x50 [ 23.906340] __kasan_record_aux_stack+0x8e/0xa0 [ 23.906687] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.907068] remove_vma+0x139/0x170 [ 23.907339] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.907664] do_vmi_munmap+0x1f1/0x2b0 [ 23.907953] __vm_munmap+0x138/0x3a0 [ 23.908233] __x64_sys_munmap+0x59/0x80 [ 23.908528] do_syscall_64+0x3f/0x90 [ 23.908808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.909197] [ 23.909328] The buggy address belongs to the object at ffff888018023740 [ 23.909328] which belongs to the cache vm_area_struct of size 168 [ 23.910217] The buggy address is located 88 bytes inside of [ 23.910217] freed 168-byte region [ffff888018023740, ffff8880180237e8) [ 23.911048] [ 23.911179] The buggy address belongs to the physical page: [ 23.911569] page:000000003fc53ad5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18023 [ 23.912210] memcg:ffff88800ddd0f01 [ 23.912455] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.912873] page_type: 0xffffffff() [ 23.913139] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f4000 0000000000000005 [ 23.913681] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddd0f01 [ 23.914226] page dumped because: kasan: bad access detected [ 23.914618] [ 23.914738] Memory state around the buggy address: [ 23.915088] ffff888018023680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.915599] ffff888018023700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.916117] >ffff888018023780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.916633] ^ [ 23.916922] ffff888018023800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 23.917438] ffff888018023880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 23.917953] ================================================================== [ 23.918504] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.839416] BUG: Bad rss-counter state mm:00000000d62587eb type:MM_FILEPAGES val:33 [ 25.840600] BUG: Bad rss-counter state mm:00000000d62587eb type:MM_ANONPAGES val:22 [ 26.356280] BUG: Bad rss-counter state mm:00000000e7607656 type:MM_FILEPAGES val:33 [ 26.357495] BUG: Bad rss-counter state mm:00000000e7607656 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30514' (ECDSA) to the list of known hosts. 2023/06/21 01:07:22 fuzzer started 2023/06/21 01:07:22 dialing manager at localhost:36067 2023/06/21 01:07:22 checking machine... 2023/06/21 01:07:22 checking revisions... [ 27.026290] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:07:23 testing simple program... [ 27.063968] cgroup: Unknown subsys name 'net' [ 27.134856] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:07:22 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888017b9f450 RCX=0000000000000001 RDX=1ffff11002f73e9f RSI=ffffffff83635bd7 RDI=ffff888017b9f45c RBP=ffff888017b9f4f8 RSP=ffff888017b9f368 R8 =0000000000000001 R9 =ffff888017b9f3c8 R10=0000000000038001 R11=0000000000091afa R12=ffff888017b9f450 R13=0000000000000000 R14=ffff88800ffad1c0 R15=00000000000128c0 RIP=ffffffff813ad543 RFL=00000216 [----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 00007fd9b5e83900 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=00007fd9b643a618 CR3=0000000009aa8000 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=0000000000000001 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=00007f69a59b4310 CR3=000000000f1c0000 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=40bc6c7a2185719d0d4c9ebf77f07465 XMM02=2c67c8bc2e329bc3000000000011a740 XMM03=fb795ef6d65770560000000000121590 XMM04=8aecf05d1fdeec5a00000000000ae988 XMM05=a47933aaf794932a0000000000131998 XMM06=806171799158d9670000000000131020 XMM07=e042d86d42eb936e0000000000121868 XMM08=f2c42d94902fd962000000000011a7a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000