[ 42.004771] BUG: Bad rss-counter state mm:000000002f282013 type:MM_FILEPAGES val:33 [ 42.005996] BUG: Bad rss-counter state mm:000000002f282013 type:MM_ANONPAGES val:22 [ 42.047922] ================================================================== [ 42.048978] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.049952] Read of size 8 at addr ffff88801b826880 by task sshd/218 [ 42.050756] [ 42.051011] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.051924] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.052937] Call Trace: [ 42.053271] [ 42.053567] dump_stack_lvl+0x91/0xf0 [ 42.054083] print_report+0xcc/0x620 [ 42.054593] ? __virt_addr_valid+0x102/0x340 [ 42.055183] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.055840] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.056489] kasan_report+0xbe/0xf0 [ 42.056986] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.057637] vma_interval_tree_remove+0xc75/0xec0 [ 42.058271] vma_prepare+0xc54/0x11a0 [ 42.058772] __split_vma+0x5af/0x950 [ 42.059291] ? __pfx___split_vma+0x10/0x10 [ 42.059850] ? find_held_lock+0x2c/0x110 [ 42.060412] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.061026] ? lock_is_held_type+0x9f/0x120 [ 42.061616] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.062273] ? mtree_range_walk+0x632/0x900 [ 42.062890] ? mas_walk+0x5c7/0x7c0 [ 42.063407] do_vmi_munmap+0x1f1/0x2b0 [ 42.063948] mmap_region+0x1f9/0x2660 [ 42.064478] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.065039] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.065827] ? __pfx_lock_acquire+0x10/0x10 [ 42.066408] ? __pfx_mmap_region+0x10/0x10 [ 42.066997] ? security_mmap_addr+0x7d/0xa0 [ 42.067576] ? get_unmapped_area+0x1f5/0x3f0 [ 42.068173] do_mmap+0x854/0xf00 [ 42.068660] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.069201] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.069813] ksys_mmap_pgoff+0x3af/0x500 [ 42.070366] do_syscall_64+0x3f/0x90 [ 42.070906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.071612] RIP: 0033:0x7f7b8cce5d82 [ 42.072107] 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 [ 42.074432] RSP: 002b:00007ffd1c6defb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.075426] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b8cce5d82 [ 42.076360] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b8c11f000 [ 42.077284] RBP: 00007f7b8c11f000 R08: 0000000000000009 R09: 0000000000001000 [ 42.078220] R10: 0000000000000812 R11: 0000000000000206 R12: 00005616ec7f0ec0 [ 42.079165] R13: 00007ffd1c6defd0 R14: 00007ffd1c6df000 R15: 00007ffd1c6df360 [ 42.080103] [ 42.080426] [ 42.080663] Allocated by task 210: [ 42.081132] kasan_save_stack+0x22/0x50 [ 42.081689] kasan_set_track+0x25/0x30 [ 42.082229] __kasan_slab_alloc+0x59/0x70 [ 42.082815] kmem_cache_alloc+0x16b/0x370 [ 42.083381] vm_area_dup+0x20/0x160 [ 42.083876] __split_vma+0x170/0x950 [ 42.084383] split_vma+0xc6/0x110 [ 42.084867] mprotect_fixup+0x8d2/0xb30 [ 42.085405] do_mprotect_pkey+0x87e/0xd40 [ 42.085959] __x64_sys_mprotect+0x78/0xc0 [ 42.086516] do_syscall_64+0x3f/0x90 [ 42.087035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.087720] [ 42.087955] Freed by task 210: [ 42.088375] kasan_save_stack+0x22/0x50 [ 42.088918] kasan_set_track+0x25/0x30 [ 42.089448] kasan_save_free_info+0x2b/0x50 [ 42.090017] __kasan_slab_free+0x10a/0x190 [ 42.090589] kmem_cache_free+0x10d/0x4d0 [ 42.091148] rcu_core+0x8c8/0x2860 [ 42.091622] __do_softirq+0x1b7/0x7d4 [ 42.092127] [ 42.092355] Last potentially related work creation: [ 42.092982] kasan_save_stack+0x22/0x50 [ 42.093516] __kasan_record_aux_stack+0x8e/0xa0 [ 42.094135] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.094825] remove_vma+0x139/0x170 [ 42.095313] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.095911] do_vmi_munmap+0x1f1/0x2b0 [ 42.096430] __vm_munmap+0x138/0x3a0 [ 42.096928] __x64_sys_munmap+0x59/0x80 [ 42.097462] do_syscall_64+0x3f/0x90 [ 42.097967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.098651] [ 42.098898] The buggy address belongs to the object at ffff88801b826828 [ 42.098898] which belongs to the cache vm_area_struct of size 168 [ 42.100468] The buggy address is located 88 bytes inside of [ 42.100468] freed 168-byte region [ffff88801b826828, ffff88801b8268d0) [ 42.101966] [ 42.102195] The buggy address belongs to the physical page: [ 42.102911] page:00000000df69d9d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b826 [ 42.104073] memcg:ffff88801b8afb01 [ 42.104530] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.105217] page_type: 0xffffffff() [ 42.105706] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.106681] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b8afb01 [ 42.107652] page dumped because: kasan: bad access detected [ 42.108353] [ 42.108584] Memory state around the buggy address: [ 42.109208] ffff88801b826780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 42.110122] ffff88801b826800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 42.111060] >ffff88801b826880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 42.111974] ^ [ 42.112407] ffff88801b826900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.113327] ffff88801b826980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 42.114235] ================================================================== [ 42.115640] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 44.855236] BUG: Bad rss-counter state mm:0000000067af39e3 type:MM_FILEPAGES val:33 [ 44.856226] BUG: Bad rss-counter state mm:0000000067af39e3 type:MM_ANONPAGES val:22 [ 45.358843] BUG: Bad rss-counter state mm:0000000050c65d3f type:MM_FILEPAGES val:33 [ 45.360047] BUG: Bad rss-counter state mm:0000000050c65d3f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8191' (ECDSA) to the list of known hosts. 2023/06/19 20:33:50 fuzzer started 2023/06/19 20:33:51 dialing manager at localhost:44161 2023/06/19 20:33:51 checking machine... 2023/06/19 20:33:51 checking revisions... [ 46.098653] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:33:51 testing simple program... [ 46.137778] cgroup: Unknown subsys name 'net' [ 46.176390] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:33:40 Registers: info registers vcpu 0 RAX=ffff8880145f0001 RBX=ffff8880145efd48 RCX=0000000000000001 RDX=ffff8880145efd50 RSI=ffff8880145efd18 RDI=ffff88806ce09a80 RBP=ffff8880145e8000 RSP=ffff88806ce09a00 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000038da3 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff8880145efd18 R15=ffff88806ce09a70 RIP=ffffffff81131cda 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 00007ff9e154d900 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=00007ff9e1b02650 CR3=000000001a3b6000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 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=ffff888008c58400 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=00007ffe86bd0458 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=00007f424c5c45100000558205616790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000