[ 24.790515] BUG: Bad rss-counter state mm:00000000bf9c9475 type:MM_FILEPAGES val:33 [ 24.791772] BUG: Bad rss-counter state mm:00000000bf9c9475 type:MM_ANONPAGES val:22 [ 24.833798] ================================================================== [ 24.834834] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.835996] Read of size 8 at addr ffff88800d832ed8 by task sshd/219 [ 24.836768] [ 24.836989] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.837863] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.838834] Call Trace: [ 24.839159] [ 24.839603] dump_stack_lvl+0x91/0xf0 [ 24.840193] print_report+0xcc/0x620 [ 24.840761] ? __virt_addr_valid+0x102/0x340 [ 24.841412] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.842141] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.842869] kasan_report+0xbe/0xf0 [ 24.843464] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.844215] vma_interval_tree_remove+0xc75/0xec0 [ 24.844949] vma_prepare+0xc54/0x11a0 [ 24.845534] __split_vma+0x5af/0x950 [ 24.846133] ? __pfx___split_vma+0x10/0x10 [ 24.846785] ? find_held_lock+0x2c/0x110 [ 24.847448] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.848138] ? lock_is_held_type+0x9f/0x120 [ 24.848672] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.849274] ? mtree_range_walk+0x632/0x900 [ 24.849820] ? mas_walk+0x5c7/0x7c0 [ 24.850290] do_vmi_munmap+0x1f1/0x2b0 [ 24.850784] mmap_region+0x1f9/0x2660 [ 24.851278] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.851788] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.852487] ? __pfx_lock_acquire+0x10/0x10 [ 24.853014] ? __pfx_mmap_region+0x10/0x10 [ 24.853539] ? security_mmap_addr+0x7d/0xa0 [ 24.854061] ? get_unmapped_area+0x1f5/0x3f0 [ 24.854599] do_mmap+0x854/0xf00 [ 24.855032] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.855535] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.856098] ksys_mmap_pgoff+0x3af/0x500 [ 24.856613] do_syscall_64+0x3f/0x90 [ 24.857089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.857734] RIP: 0033:0x7fb9771d7d82 [ 24.858194] 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 [ 24.860409] RSP: 002b:00007ffeebba5268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.861343] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9771d7d82 [ 24.862225] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb976611000 [ 24.863102] RBP: 00007fb976611000 R08: 0000000000000009 R09: 0000000000001000 [ 24.863999] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556b2b36cec0 [ 24.864880] R13: 00007ffeebba5280 R14: 00007ffeebba52b0 R15: 00007ffeebba5610 [ 24.865761] [ 24.866058] [ 24.866280] Allocated by task 212: [ 24.866722] kasan_save_stack+0x22/0x50 [ 24.867247] kasan_set_track+0x25/0x30 [ 24.867759] __kasan_slab_alloc+0x59/0x70 [ 24.868299] kmem_cache_alloc+0x16b/0x370 [ 24.868839] vm_area_dup+0x20/0x160 [ 24.869318] __split_vma+0x170/0x950 [ 24.869795] split_vma+0xc6/0x110 [ 24.870244] mprotect_fixup+0x8d2/0xb30 [ 24.870762] do_mprotect_pkey+0x87e/0xd40 [ 24.871325] __x64_sys_mprotect+0x78/0xc0 [ 24.871862] do_syscall_64+0x3f/0x90 [ 24.872351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.873020] [ 24.873241] Freed by task 13: [ 24.873646] kasan_save_stack+0x22/0x50 [ 24.874169] kasan_set_track+0x25/0x30 [ 24.874680] kasan_save_free_info+0x2b/0x50 [ 24.875225] __kasan_slab_free+0x10a/0x190 [ 24.875876] kmem_cache_free+0x10d/0x4d0 [ 24.876402] rcu_core+0x8c8/0x2860 [ 24.876872] __do_softirq+0x1b7/0x7d4 [ 24.877363] [ 24.877582] Last potentially related work creation: [ 24.878186] kasan_save_stack+0x22/0x50 [ 24.878707] __kasan_record_aux_stack+0x8e/0xa0 [ 24.879344] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.880016] remove_vma+0x139/0x170 [ 24.880482] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.881059] do_vmi_munmap+0x1f1/0x2b0 [ 24.881562] __vm_munmap+0x138/0x3a0 [ 24.882051] __x64_sys_munmap+0x59/0x80 [ 24.882570] do_syscall_64+0x3f/0x90 [ 24.883055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.883733] [ 24.883953] Second to last potentially related work creation: [ 24.884660] kasan_save_stack+0x22/0x50 [ 24.885184] __kasan_record_aux_stack+0x8e/0xa0 [ 24.885791] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.886456] remove_vma+0x139/0x170 [ 24.886924] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.887517] do_vmi_munmap+0x1f1/0x2b0 [ 24.888017] mmap_region+0x1f9/0x2660 [ 24.888512] do_mmap+0x854/0xf00 [ 24.888955] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.889461] ksys_mmap_pgoff+0x3af/0x500 [ 24.889985] do_syscall_64+0x3f/0x90 [ 24.890474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.891134] [ 24.891379] The buggy address belongs to the object at ffff88800d832e80 [ 24.891379] which belongs to the cache vm_area_struct of size 168 [ 24.892892] The buggy address is located 88 bytes inside of [ 24.892892] freed 168-byte region [ffff88800d832e80, ffff88800d832f28) [ 24.894374] [ 24.894595] The buggy address belongs to the physical page: [ 24.895292] page:00000000b9371ebe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd832 [ 24.896371] memcg:ffff88800ea02401 [ 24.896793] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.897483] page_type: 0xffffffff() [ 24.897931] raw: 0100000000000200 ffff88800879fc80 ffffea00003b5a80 dead000000000007 [ 24.898871] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea02401 [ 24.899784] page dumped because: kasan: bad access detected [ 24.900457] [ 24.900689] Memory state around the buggy address: [ 24.901337] ffff88800d832d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.902215] ffff88800d832e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.903065] >ffff88800d832e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.903919] ^ [ 24.904649] ffff88800d832f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 24.905502] ffff88800d832f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.906353] ================================================================== [ 24.907330] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.648129] BUG: Bad rss-counter state mm:00000000a415f647 type:MM_FILEPAGES val:33 [ 27.649172] BUG: Bad rss-counter state mm:00000000a415f647 type:MM_ANONPAGES val:22 [ 28.130996] BUG: Bad rss-counter state mm:000000004a3264b8 type:MM_FILEPAGES val:33 [ 28.132247] BUG: Bad rss-counter state mm:000000004a3264b8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44093' (ECDSA) to the list of known hosts. 2023/06/19 13:04:11 fuzzer started 2023/06/19 13:04:11 dialing manager at localhost:44161 2023/06/19 13:04:11 checking machine... 2023/06/19 13:04:11 checking revisions... [ 28.936190] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:04:11 testing simple program... [ 28.984648] cgroup: Unknown subsys name 'net' [ 29.029219] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:04:10 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888016788400 RCX=0000000080000000 RDX=ffff888016788400 RSI=ffffffff8449ee91 RDI=ffff8880167884f0 RBP=ffff888016788408 RSP=ffff88800d9d7ce0 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000003 R11=0000000000000000 R12=0000000000000001 R13=0000000000000008 R14=00007f34e722a000 R15=ffffffffffffffff RIP=ffffffff814c07f1 RFL=00000206 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f34e6e8e900 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=00007f34e722a3ec CR3=0000000019b3c000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888008d49b40 RSI=ffffffff81651bf2 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff888008d5f1b8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000009293 R12=0000000000000001 R13=ffff888019366fa8 R14=ffffffffffffffff R15=ffff8880198ed000 RIP=ffffffff814c081b 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 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=00007f618dd976f8 CR3=0000000005482000 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=ffffffff000000000000000000000000 XMM02=ffffffff000000000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007f04e626dc71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000726f7475636578652d7a7973 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000