[ 23.658399] BUG: Bad rss-counter state mm:00000000b8542c31 type:MM_FILEPAGES val:33 [ 23.660114] BUG: Bad rss-counter state mm:00000000b8542c31 type:MM_ANONPAGES val:22 [ 23.823567] ================================================================== [ 23.824476] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.825412] Read of size 8 at addr ffff88800d51f4e0 by task sshd/222 [ 23.826179] [ 23.826396] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.827423] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.828396] Call Trace: [ 23.828737] [ 23.829025] dump_stack_lvl+0x91/0xf0 [ 23.829527] print_report+0xcc/0x620 [ 23.830018] ? __virt_addr_valid+0x102/0x340 [ 23.830572] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.831204] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.831827] kasan_report+0xbe/0xf0 [ 23.832309] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.832967] vma_interval_tree_remove+0xc75/0xec0 [ 23.833611] vma_prepare+0xc54/0x11a0 [ 23.834111] __split_vma+0x5af/0x950 [ 23.834612] ? __pfx___split_vma+0x10/0x10 [ 23.835187] ? find_held_lock+0x2c/0x110 [ 23.835744] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.836351] ? lock_is_held_type+0x9f/0x120 [ 23.836920] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.837565] ? mtree_range_walk+0x632/0x900 [ 23.838142] ? mas_walk+0x5c7/0x7c0 [ 23.838645] do_vmi_munmap+0x1f1/0x2b0 [ 23.839198] mmap_region+0x1f9/0x2660 [ 23.839711] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.840253] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.841003] ? __pfx_lock_acquire+0x10/0x10 [ 23.841573] ? __pfx_mmap_region+0x10/0x10 [ 23.842134] ? security_mmap_addr+0x7d/0xa0 [ 23.842682] ? get_unmapped_area+0x1f5/0x3f0 [ 23.843268] do_mmap+0x854/0xf00 [ 23.843742] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.844262] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.844855] ksys_mmap_pgoff+0x3af/0x500 [ 23.845396] do_syscall_64+0x3f/0x90 [ 23.845909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.846598] RIP: 0033:0x7f333c9b0d82 [ 23.847074] 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 [ 23.849331] RSP: 002b:00007ffcd787d9f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.850282] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f333c9b0d82 [ 23.851186] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f333bdea000 [ 23.852081] RBP: 00007f333bdea000 R08: 0000000000000009 R09: 0000000000001000 [ 23.852962] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558aa70aab20 [ 23.853862] R13: 00007ffcd787da10 R14: 00007ffcd787da40 R15: 00007ffcd787dda0 [ 23.854769] [ 23.855075] [ 23.855313] Allocated by task 213: [ 23.855768] kasan_save_stack+0x22/0x50 [ 23.856304] kasan_set_track+0x25/0x30 [ 23.856821] __kasan_slab_alloc+0x59/0x70 [ 23.857365] kmem_cache_alloc+0x16b/0x370 [ 23.857915] vm_area_dup+0x20/0x160 [ 23.858394] __split_vma+0x170/0x950 [ 23.858883] split_vma+0xc6/0x110 [ 23.859371] mprotect_fixup+0x8d2/0xb30 [ 23.859897] do_mprotect_pkey+0x87e/0xd40 [ 23.860452] __x64_sys_mprotect+0x78/0xc0 [ 23.860997] do_syscall_64+0x3f/0x90 [ 23.861495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.862173] [ 23.862398] Freed by task 213: [ 23.862809] kasan_save_stack+0x22/0x50 [ 23.863347] kasan_set_track+0x25/0x30 [ 23.863860] kasan_save_free_info+0x2b/0x50 [ 23.864422] __kasan_slab_free+0x10a/0x190 [ 23.864975] kmem_cache_free+0x10d/0x4d0 [ 23.865506] rcu_core+0x8c8/0x2860 [ 23.865975] __do_softirq+0x1b7/0x7d4 [ 23.866485] [ 23.866711] Last potentially related work creation: [ 23.867351] kasan_save_stack+0x22/0x50 [ 23.867873] __kasan_record_aux_stack+0x8e/0xa0 [ 23.868475] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.869148] remove_vma+0x139/0x170 [ 23.869630] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.870221] do_vmi_munmap+0x1f1/0x2b0 [ 23.870736] __vm_munmap+0x138/0x3a0 [ 23.871241] __x64_sys_munmap+0x59/0x80 [ 23.871766] do_syscall_64+0x3f/0x90 [ 23.872262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.872941] [ 23.873167] The buggy address belongs to the object at ffff88800d51f488 [ 23.873167] which belongs to the cache vm_area_struct of size 168 [ 23.874747] The buggy address is located 88 bytes inside of [ 23.874747] freed 168-byte region [ffff88800d51f488, ffff88800d51f530) [ 23.876242] [ 23.876466] The buggy address belongs to the physical page: [ 23.877171] page:00000000cd17f9d1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd51f [ 23.878336] memcg:ffff88800e93c301 [ 23.878792] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.879548] page_type: 0xffffffff() [ 23.880032] raw: 0100000000000200 ffff8880087a0c80 ffffea0000384200 dead000000000003 [ 23.881004] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e93c301 [ 23.881979] page dumped because: kasan: bad access detected [ 23.882678] [ 23.882900] Memory state around the buggy address: [ 23.883523] ffff88800d51f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.884433] ffff88800d51f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.885351] >ffff88800d51f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.886247] ^ [ 23.887043] ffff88800d51f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 23.887959] ffff88800d51f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.888858] ================================================================== [ 23.889947] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.547437] BUG: Bad rss-counter state mm:00000000c5959f62 type:MM_FILEPAGES val:33 [ 26.548414] BUG: Bad rss-counter state mm:00000000c5959f62 type:MM_ANONPAGES val:22 [ 27.088085] BUG: Bad rss-counter state mm:00000000955618d2 type:MM_FILEPAGES val:33 [ 27.089254] BUG: Bad rss-counter state mm:00000000955618d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31170' (ECDSA) to the list of known hosts. 2023/06/21 07:26:34 fuzzer started 2023/06/21 07:26:34 dialing manager at localhost:36067 2023/06/21 07:26:34 checking machine... 2023/06/21 07:26:34 checking revisions... [ 27.762493] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:26:34 testing simple program... [ 27.811436] cgroup: Unknown subsys name 'net' [ 27.862439] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:26:33 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff888010017790 RCX=0000000000000000 RDX=000000000000007c RSI=ffffffff81fce879 RDI=ffff888010017790 RBP=ffff888010017798 RSP=ffff8880100176c8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888017a6b684 R13=000000000000007c R14=0000000000000000 R15=ffff888010017790 RIP=ffffffff81fce8a5 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 00007fb7e5422700 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=00007f5f314735a0 CR3=000000000b396000 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=2033333a36323a3730203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a36323a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888016d47d28 RBX=000000000000000b RCX=0000000000000000 RDX=1ffff11002da8fa5 RSI=000000000000000b RDI=ffffffff87f97640 RBP=ffffffff87f97640 RSP=ffff888016d47ab0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888016d47b38 R14=ffff888016d47b38 R15=00000000000000e5 RIP=ffffffff814c0864 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 00007f09cfee2900 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=00007ffe00bdc000 CR3=000000000eb86000 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=563412feff00545000000000000080fe 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