syzkaller login: [ 30.353077] BUG: Bad rss-counter state mm:00000000b4a4b9ce type:MM_FILEPAGES val:33 [ 30.354857] BUG: Bad rss-counter state mm:00000000b4a4b9ce type:MM_ANONPAGES val:22 [ 30.492658] ================================================================== [ 30.493391] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.494133] Read of size 8 at addr ffff88800e118d08 by task sshd/220 [ 30.494711] [ 30.494880] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.495539] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.496289] Call Trace: [ 30.496542] [ 30.496749] dump_stack_lvl+0x91/0xf0 [ 30.498816] print_report+0xcc/0x620 [ 30.499791] ? __virt_addr_valid+0x102/0x340 [ 30.500931] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.502571] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.503809] kasan_report+0xbe/0xf0 [ 30.504771] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.506087] vma_interval_tree_remove+0xc75/0xec0 [ 30.507326] vma_prepare+0xc54/0x11a0 [ 30.508233] __split_vma+0x5af/0x950 [ 30.509321] ? __pfx___split_vma+0x10/0x10 [ 30.510370] ? find_held_lock+0x2c/0x110 [ 30.511398] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.512531] ? lock_is_held_type+0x9f/0x120 [ 30.513621] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.514801] ? mtree_range_walk+0x632/0x900 [ 30.515879] ? mas_walk+0x5c7/0x7c0 [ 30.516840] do_vmi_munmap+0x1f1/0x2b0 [ 30.517929] mmap_region+0x1f9/0x2660 [ 30.518880] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.519906] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.521478] ? __pfx_lock_acquire+0x10/0x10 [ 30.522574] ? __pfx_mmap_region+0x10/0x10 [ 30.523641] ? security_mmap_addr+0x7d/0xa0 [ 30.524737] ? get_unmapped_area+0x1f5/0x3f0 [ 30.525903] do_mmap+0x854/0xf00 [ 30.526791] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.527821] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.528954] ksys_mmap_pgoff+0x3af/0x500 [ 30.529963] do_syscall_64+0x3f/0x90 [ 30.530901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.532198] RIP: 0033:0x7f7e56531d82 [ 30.533143] 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 [ 30.537818] RSP: 002b:00007ffc588a3fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.540187] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7e56531d82 [ 30.541943] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7e5596b000 [ 30.543685] RBP: 00007f7e5596b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.545489] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561206908980 [ 30.547177] R13: 00007ffc588a3ff0 R14: 00007ffc588a4020 R15: 00007ffc588a4380 [ 30.549027] [ 30.549635] [ 30.550024] Allocated by task 213: [ 30.550907] kasan_save_stack+0x22/0x50 [ 30.551941] kasan_set_track+0x25/0x30 [ 30.552959] __kasan_slab_alloc+0x59/0x70 [ 30.553996] kmem_cache_alloc+0x16b/0x370 [ 30.555003] vm_area_dup+0x20/0x160 [ 30.555906] __split_vma+0x170/0x950 [ 30.556829] split_vma+0xc6/0x110 [ 30.557691] mprotect_fixup+0x8d2/0xb30 [ 30.558629] do_mprotect_pkey+0x87e/0xd40 [ 30.559631] __x64_sys_mprotect+0x78/0xc0 [ 30.560665] do_syscall_64+0x3f/0x90 [ 30.561607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.562829] [ 30.563199] Freed by task 13: [ 30.563960] kasan_save_stack+0x22/0x50 [ 30.564958] kasan_set_track+0x25/0x30 [ 30.565960] kasan_save_free_info+0x2b/0x50 [ 30.567001] __kasan_slab_free+0x10a/0x190 [ 30.568055] kmem_cache_free+0x10d/0x4d0 [ 30.569152] rcu_core+0x8c8/0x2860 [ 30.570040] __do_softirq+0x1b7/0x7d4 [ 30.570963] [ 30.571411] Last potentially related work creation: [ 30.572675] kasan_save_stack+0x22/0x50 [ 30.573653] __kasan_record_aux_stack+0x8e/0xa0 [ 30.574766] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.575995] remove_vma+0x139/0x170 [ 30.576902] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.577989] do_vmi_munmap+0x1f1/0x2b0 [ 30.578905] __vm_munmap+0x138/0x3a0 [ 30.579794] __x64_sys_munmap+0x59/0x80 [ 30.580522] do_syscall_64+0x3f/0x90 [ 30.580850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.581379] [ 30.581532] The buggy address belongs to the object at ffff88800e118cb0 [ 30.581532] which belongs to the cache vm_area_struct of size 168 [ 30.582589] The buggy address is located 88 bytes inside of [ 30.582589] freed 168-byte region [ffff88800e118cb0, ffff88800e118d58) [ 30.583559] [ 30.583702] The buggy address belongs to the physical page: [ 30.584118] page:00000000bbf4dd3d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe118 [ 30.584933] memcg:ffff88800fc5a501 [ 30.585245] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.585662] page_type: 0xffffffff() [ 30.585945] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.586538] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc5a501 [ 30.587120] page dumped because: kasan: bad access detected [ 30.587556] [ 30.587702] Memory state around the buggy address: [ 30.588086] ffff88800e118c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.588649] ffff88800e118c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.589261] >ffff88800e118d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.590188] ^ [ 30.590544] ffff88800e118d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.591128] ffff88800e118e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.591743] ================================================================== [ 30.592469] Disabling lock debugging due to kernel taint [ 32.598206] BUG: Bad rss-counter state mm:00000000ec619a48 type:MM_FILEPAGES val:33 [ 32.601331] BUG: Bad rss-counter state mm:00000000ec619a48 type:MM_ANONPAGES val:22 [ 33.181099] BUG: Bad rss-counter state mm:00000000d779c47f type:MM_FILEPAGES val:33 [ 33.181725] BUG: Bad rss-counter state mm:00000000d779c47f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20126' (ECDSA) to the list of known hosts. 2023/06/21 10:26:06 fuzzer started 2023/06/21 10:26:06 dialing manager at localhost:36067 2023/06/21 10:26:06 checking machine... 2023/06/21 10:26:06 checking revisions... [ 34.026849] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:26:06 testing simple program... [ 34.066101] cgroup: Unknown subsys name 'net' [ 34.117387] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:26:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f2e7920 RCX=ffff88800f2e78f8 RDX=1ffff11001e5cf26 RSI=ffffffff813ad720 RDI=ffff88800f2e7930 RBP=ffff88800f2e78f0 RSP=ffff88800f2e7838 R8 =0000000000000001 R9 =ffff88800f2e7898 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800f2e7920 R13=0000000000000000 R14=ffff888016910000 R15=ffff88800dbf2d80 RIP=ffffffff813ad496 RFL=00000292 [--S-A--] 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=00007f0c212f3328 CR3=0000000010236000 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=36323a3031203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363538 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=ffff888008c04400 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=00007f781e6bca00 CR3=0000000010236000 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=2035303a36323a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a36323a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000