syzkaller login: [ 46.914205] BUG: Bad rss-counter state mm:000000001cc8d97a type:MM_FILEPAGES val:33 [ 46.914916] BUG: Bad rss-counter state mm:000000001cc8d97a type:MM_ANONPAGES val:22 [ 47.039033] ================================================================== [ 47.039681] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.040322] Read of size 8 at addr ffff888019c0b6b0 by task sshd/218 [ 47.040858] [ 47.041008] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.041640] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.042299] Call Trace: [ 47.042518] [ 47.042714] dump_stack_lvl+0x91/0xf0 [ 47.043044] print_report+0xcc/0x620 [ 47.043375] ? __virt_addr_valid+0x102/0x340 [ 47.043751] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.044262] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.044676] kasan_report+0xbe/0xf0 [ 47.044998] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.045425] vma_interval_tree_remove+0xc75/0xec0 [ 47.045850] vma_prepare+0xc54/0x11a0 [ 47.046186] __split_vma+0x5af/0x950 [ 47.046508] ? __pfx___split_vma+0x10/0x10 [ 47.046873] ? find_held_lock+0x2c/0x110 [ 47.047225] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.047610] ? lock_is_held_type+0x9f/0x120 [ 47.047976] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.048386] ? mtree_range_walk+0x632/0x900 [ 47.048750] ? mas_walk+0x5c7/0x7c0 [ 47.049084] do_vmi_munmap+0x1f1/0x2b0 [ 47.049406] mmap_region+0x1f9/0x2660 [ 47.049728] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.050060] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.050525] ? __pfx_lock_acquire+0x10/0x10 [ 47.050870] ? __pfx_mmap_region+0x10/0x10 [ 47.051215] ? security_mmap_addr+0x7d/0xa0 [ 47.051562] ? get_unmapped_area+0x1f5/0x3f0 [ 47.051917] do_mmap+0x854/0xf00 [ 47.052199] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.052521] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.052892] ksys_mmap_pgoff+0x3af/0x500 [ 47.053237] do_syscall_64+0x3f/0x90 [ 47.053548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.053965] RIP: 0033:0x7fc3a1c88d82 [ 47.054262] 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 [ 47.055635] RSP: 002b:00007ffcdd679918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.056217] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc3a1c88d82 [ 47.056763] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc3a10c2000 [ 47.057319] RBP: 00007fc3a10c2000 R08: 0000000000000009 R09: 0000000000001000 [ 47.057866] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559cee729f70 [ 47.058407] R13: 00007ffcdd679930 R14: 00007ffcdd679960 R15: 00007ffcdd679cc0 [ 47.058972] [ 47.059162] [ 47.059303] Allocated by task 211: [ 47.059582] kasan_save_stack+0x22/0x50 [ 47.059914] kasan_set_track+0x25/0x30 [ 47.060234] __kasan_slab_alloc+0x59/0x70 [ 47.060578] kmem_cache_alloc+0x16b/0x370 [ 47.060910] vm_area_dup+0x20/0x160 [ 47.061231] __split_vma+0x170/0x950 [ 47.061532] split_vma+0xc6/0x110 [ 47.061825] mprotect_fixup+0x8d2/0xb30 [ 47.062153] do_mprotect_pkey+0x87e/0xd40 [ 47.062489] __x64_sys_mprotect+0x78/0xc0 [ 47.062830] do_syscall_64+0x3f/0x90 [ 47.063139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.063560] [ 47.063830] Freed by task 202: [ 47.064085] kasan_save_stack+0x22/0x50 [ 47.064410] kasan_set_track+0x25/0x30 [ 47.064739] kasan_save_free_info+0x2b/0x50 [ 47.065090] __kasan_slab_free+0x10a/0x190 [ 47.065441] kmem_cache_free+0x10d/0x4d0 [ 47.065771] rcu_core+0x8c8/0x2860 [ 47.066059] __do_softirq+0x1b7/0x7d4 [ 47.066371] [ 47.066510] Last potentially related work creation: [ 47.066889] kasan_save_stack+0x22/0x50 [ 47.067214] __kasan_record_aux_stack+0x8e/0xa0 [ 47.067585] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.068000] remove_vma+0x139/0x170 [ 47.068290] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.068656] do_vmi_munmap+0x1f1/0x2b0 [ 47.068972] __vm_munmap+0x138/0x3a0 [ 47.069287] __x64_sys_munmap+0x59/0x80 [ 47.069615] do_syscall_64+0x3f/0x90 [ 47.069925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.070338] [ 47.070478] Second to last potentially related work creation: [ 47.070926] kasan_save_stack+0x22/0x50 [ 47.071251] __kasan_record_aux_stack+0x8e/0xa0 [ 47.071627] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.072041] remove_vma+0x139/0x170 [ 47.072337] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.072698] do_vmi_munmap+0x1f1/0x2b0 [ 47.073012] mmap_region+0x1f9/0x2660 [ 47.073345] do_mmap+0x854/0xf00 [ 47.073624] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.073942] ksys_mmap_pgoff+0x7d/0x500 [ 47.074260] do_syscall_64+0x3f/0x90 [ 47.074567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.074978] [ 47.075116] The buggy address belongs to the object at ffff888019c0b658 [ 47.075116] which belongs to the cache vm_area_struct of size 168 [ 47.076066] The buggy address is located 88 bytes inside of [ 47.076066] freed 168-byte region [ffff888019c0b658, ffff888019c0b700) [ 47.077070] [ 47.077213] The buggy address belongs to the physical page: [ 47.077639] page:0000000010140629 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c0b [ 47.078338] memcg:ffff888019c0c001 [ 47.078627] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.079045] page_type: 0xffffffff() [ 47.079341] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 47.079943] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c0c001 [ 47.080535] page dumped because: kasan: bad access detected [ 47.080960] [ 47.081123] Memory state around the buggy address: [ 47.081497] ffff888019c0b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.082061] ffff888019c0b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 47.082615] >ffff888019c0b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.083167] ^ [ 47.083547] ffff888019c0b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 47.084097] ffff888019c0b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 47.084658] ================================================================== [ 47.085328] Disabling lock debugging due to kernel taint [ 48.518948] BUG: Bad rss-counter state mm:000000004d5dd0bb type:MM_FILEPAGES val:33 [ 48.519702] BUG: Bad rss-counter state mm:000000004d5dd0bb type:MM_ANONPAGES val:22 [ 48.922001] BUG: Bad rss-counter state mm:0000000019916696 type:MM_FILEPAGES val:33 [ 48.922742] BUG: Bad rss-counter state mm:0000000019916696 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36409' (ECDSA) to the list of known hosts. 2023/06/20 09:39:16 fuzzer started 2023/06/20 09:39:17 dialing manager at localhost:44161 2023/06/20 09:39:17 checking machine... 2023/06/20 09:39:17 checking revisions... [ 49.382070] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:39:17 testing simple program... [ 49.414517] cgroup: Unknown subsys name 'net' [ 49.446303] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:39:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=00000000000361a0 RCX=ffffffff81830587 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88800ca53e18 RBP=ffff88800ca53e00 RSP=ffff88806ce09db0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000288 R13=ffffffff87b67200 R14=ffff8880094c7600 R15=ffff88800ca53e18 RIP=ffffffff8180fd28 RFL=00000046 [---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=0000560200b47b40 CR3=000000000cac6000 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=2036313a39333a3930203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a39333a3930203032 XMM08=3d656e696c646d632022656369767265 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=ffff888019dfd1c0 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000005 RSP=ffff88800e39f890 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000040002 R13=0000000000000007 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0384 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 00007f7c3eeed900 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=00007f7c3f4a2650 CR3=0000000015978000 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