[ 24.807254] BUG: Bad rss-counter state mm:00000000d09f2639 type:MM_FILEPAGES val:33 [ 24.808449] BUG: Bad rss-counter state mm:00000000d09f2639 type:MM_ANONPAGES val:22 [ 24.847856] ================================================================== [ 24.848915] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.850049] Read of size 8 at addr ffff88800c508058 by task sshd/219 [ 24.850909] [ 24.851262] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.852152] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.853340] Call Trace: [ 24.853666] [ 24.854029] dump_stack_lvl+0x91/0xf0 [ 24.854569] print_report+0xcc/0x620 [ 24.855075] ? __virt_addr_valid+0x102/0x340 [ 24.855640] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.856251] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.856999] kasan_report+0xbe/0xf0 [ 24.857495] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.858110] vma_interval_tree_remove+0xc75/0xec0 [ 24.858711] vma_prepare+0xc54/0x11a0 [ 24.859200] __split_vma+0x5af/0x950 [ 24.859675] ? __pfx___split_vma+0x10/0x10 [ 24.860206] ? find_held_lock+0x2c/0x110 [ 24.860723] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.861285] ? lock_is_held_type+0x9f/0x120 [ 24.861822] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.862430] ? mtree_range_walk+0x632/0x900 [ 24.862984] ? mas_walk+0x5c7/0x7c0 [ 24.863477] do_vmi_munmap+0x1f1/0x2b0 [ 24.863964] mmap_region+0x1f9/0x2660 [ 24.864447] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.864962] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.865686] ? __pfx_lock_acquire+0x10/0x10 [ 24.866214] ? __pfx_mmap_region+0x10/0x10 [ 24.866739] ? security_mmap_addr+0x7d/0xa0 [ 24.867291] ? get_unmapped_area+0x1f5/0x3f0 [ 24.867834] do_mmap+0x854/0xf00 [ 24.868272] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.868768] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.869326] ksys_mmap_pgoff+0x3af/0x500 [ 24.869829] do_syscall_64+0x3f/0x90 [ 24.870302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.870940] RIP: 0033:0x7fc060cb4d82 [ 24.871404] 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 [ 24.873520] RSP: 002b:00007fffa20dc258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.874434] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc060cb4d82 [ 24.875300] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc0600ee000 [ 24.876136] RBP: 00007fc0600ee000 R08: 0000000000000009 R09: 0000000000001000 [ 24.876971] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce9cc0ef70 [ 24.877814] R13: 00007fffa20dc270 R14: 00007fffa20dc2a0 R15: 00007fffa20dc600 [ 24.878671] [ 24.878964] [ 24.879193] Allocated by task 211: [ 24.879627] kasan_save_stack+0x22/0x50 [ 24.880136] kasan_set_track+0x25/0x30 [ 24.880627] __kasan_slab_alloc+0x59/0x70 [ 24.881146] kmem_cache_alloc+0x16b/0x370 [ 24.881670] vm_area_dup+0x20/0x160 [ 24.882128] __split_vma+0x170/0x950 [ 24.882594] split_vma+0xc6/0x110 [ 24.883038] mprotect_fixup+0x8d2/0xb30 [ 24.883548] do_mprotect_pkey+0x87e/0xd40 [ 24.884071] __x64_sys_mprotect+0x78/0xc0 [ 24.884590] do_syscall_64+0x3f/0x90 [ 24.885059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.885697] [ 24.885910] Freed by task 211: [ 24.886297] kasan_save_stack+0x22/0x50 [ 24.886804] kasan_set_track+0x25/0x30 [ 24.887315] kasan_save_free_info+0x2b/0x50 [ 24.887848] __kasan_slab_free+0x10a/0x190 [ 24.888378] kmem_cache_free+0x10d/0x4d0 [ 24.888894] rcu_core+0x8c8/0x2860 [ 24.889337] __do_softirq+0x1b7/0x7d4 [ 24.889812] [ 24.890032] Last potentially related work creation: [ 24.890630] kasan_save_stack+0x22/0x50 [ 24.891152] __kasan_record_aux_stack+0x8e/0xa0 [ 24.891732] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.892385] remove_vma+0x139/0x170 [ 24.892897] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.893463] do_vmi_munmap+0x1f1/0x2b0 [ 24.893953] __vm_munmap+0x138/0x3a0 [ 24.894420] __x64_sys_munmap+0x59/0x80 [ 24.894919] do_syscall_64+0x3f/0x90 [ 24.895415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.896057] [ 24.896275] Second to last potentially related work creation: [ 24.896966] kasan_save_stack+0x22/0x50 [ 24.897475] __kasan_record_aux_stack+0x8e/0xa0 [ 24.898052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.898695] remove_vma+0x139/0x170 [ 24.899151] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.899708] do_vmi_munmap+0x1f1/0x2b0 [ 24.900200] mmap_region+0x1f9/0x2660 [ 24.900677] do_mmap+0x854/0xf00 [ 24.901112] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.901604] ksys_mmap_pgoff+0x3af/0x500 [ 24.902100] do_syscall_64+0x3f/0x90 [ 24.902577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.903235] [ 24.903455] The buggy address belongs to the object at ffff88800c508000 [ 24.903455] which belongs to the cache vm_area_struct of size 168 [ 24.904927] The buggy address is located 88 bytes inside of [ 24.904927] freed 168-byte region [ffff88800c508000, ffff88800c5080a8) [ 24.906353] [ 24.906570] The buggy address belongs to the physical page: [ 24.907258] page:0000000035b2ee00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc508 [ 24.908339] memcg:ffff88800c9de901 [ 24.908771] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.909474] page_type: 0xffffffff() [ 24.909923] raw: 0100000000000200 ffff88800879fc80 ffffea00003f1240 dead000000000007 [ 24.910856] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9de901 [ 24.911766] page dumped because: kasan: bad access detected [ 24.912428] [ 24.912650] Memory state around the buggy address: [ 24.913231] ffff88800c507f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.914080] ffff88800c507f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.914932] >ffff88800c508000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.915819] ^ [ 24.916574] ffff88800c508080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 24.917453] ffff88800c508100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.918299] ================================================================== [ 24.919290] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.944629] BUG: Bad rss-counter state mm:00000000da93ea2c type:MM_FILEPAGES val:33 [ 26.945795] BUG: Bad rss-counter state mm:00000000da93ea2c type:MM_ANONPAGES val:22 [ 27.412249] BUG: Bad rss-counter state mm:00000000aeb32657 type:MM_FILEPAGES val:33 [ 27.413248] BUG: Bad rss-counter state mm:00000000aeb32657 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47313' (ECDSA) to the list of known hosts. 2023/06/19 15:20:09 fuzzer started 2023/06/19 15:20:10 dialing manager at localhost:44161 2023/06/19 15:20:10 checking machine... 2023/06/19 15:20:10 checking revisions... [ 28.104342] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:20:10 testing simple program... [ 28.147639] cgroup: Unknown subsys name 'net' [ 28.201359] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:20:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864b1c8c RDX=1ffff1100d9c135c RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b1c90 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5420 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=0000000000000005 R15=ffff88806ce09a98 RIP=ffffffff81130b54 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 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=00005556c546a290 CR3=000000000e552000 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=2039303a30323a3531203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a30323a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff888016e2ff60 RSI=ffff888016e2ff48 RDI=ffff88806cf09a70 RBP=ffff88806cf09b08 RSP=ffff88806cf09a68 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888015893680 R15=ffff88800d8f1c00 RIP=ffffffff81130340 RFL=00000202 [-------] 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 00007f13a1e2f900 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=00007f13a23e4650 CR3=000000001c5cc000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000