syzkaller login: [ 31.263680] BUG: Bad rss-counter state mm:00000000b213d196 type:MM_FILEPAGES val:33 [ 31.264196] BUG: Bad rss-counter state mm:00000000b213d196 type:MM_ANONPAGES val:22 [ 31.465839] ================================================================== [ 31.466473] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.467104] Read of size 8 at addr ffff88800f45f058 by task sshd/223 [ 31.467643] [ 31.467793] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.468366] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.469015] Call Trace: [ 31.469231] [ 31.469432] dump_stack_lvl+0x91/0xf0 [ 31.469787] print_report+0xcc/0x620 [ 31.470116] ? __virt_addr_valid+0x102/0x340 [ 31.470493] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.470912] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.471329] kasan_report+0xbe/0xf0 [ 31.471703] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.472125] vma_interval_tree_remove+0xc75/0xec0 [ 31.472539] vma_prepare+0xc54/0x11a0 [ 31.473608] __split_vma+0x5af/0x950 [ 31.473936] ? __pfx___split_vma+0x10/0x10 [ 31.474355] ? find_held_lock+0x2c/0x110 [ 31.474724] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.475113] ? lock_is_held_type+0x9f/0x120 [ 31.475540] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.475957] ? mtree_range_walk+0x632/0x900 [ 31.476417] ? mas_walk+0x5c7/0x7c0 [ 31.476742] do_vmi_munmap+0x1f1/0x2b0 [ 31.477108] mmap_region+0x1f9/0x2660 [ 31.477490] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.477840] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.478284] ? __pfx_lock_acquire+0x10/0x10 [ 31.478662] ? __pfx_mmap_region+0x10/0x10 [ 31.478979] ? security_mmap_addr+0x7d/0xa0 [ 31.479295] ? get_unmapped_area+0x1f5/0x3f0 [ 31.479678] do_mmap+0x854/0xf00 [ 31.479941] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.480237] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.480652] ksys_mmap_pgoff+0x3af/0x500 [ 31.480984] do_syscall_64+0x3f/0x90 [ 31.481269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.481809] RIP: 0033:0x7f269ba06d82 [ 31.482082] 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 [ 31.483510] RSP: 002b:00007fff180020c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.484091] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f269ba06d82 [ 31.484713] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f269ae40000 [ 31.485278] RBP: 00007f269ae40000 R08: 0000000000000009 R09: 0000000000001000 [ 31.485864] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563af7517d90 [ 31.486455] R13: 00007fff180020e0 R14: 00007fff18002110 R15: 00007fff18002470 [ 31.487008] [ 31.487199] [ 31.487387] Allocated by task 214: [ 31.487665] kasan_save_stack+0x22/0x50 [ 31.487996] kasan_set_track+0x25/0x30 [ 31.488385] __kasan_slab_alloc+0x59/0x70 [ 31.488730] kmem_cache_alloc+0x16b/0x370 [ 31.489085] vm_area_dup+0x20/0x160 [ 31.489431] __split_vma+0x170/0x950 [ 31.489732] split_vma+0xc6/0x110 [ 31.490018] mprotect_fixup+0x8d2/0xb30 [ 31.490397] do_mprotect_pkey+0x87e/0xd40 [ 31.490738] __x64_sys_mprotect+0x78/0xc0 [ 31.491077] do_syscall_64+0x3f/0x90 [ 31.491444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.491866] [ 31.492008] Freed by task 214: [ 31.492258] kasan_save_stack+0x22/0x50 [ 31.492625] kasan_set_track+0x25/0x30 [ 31.492955] kasan_save_free_info+0x2b/0x50 [ 31.493343] __kasan_slab_free+0x10a/0x190 [ 31.493697] kmem_cache_free+0x10d/0x4d0 [ 31.494026] rcu_core+0x8c8/0x2860 [ 31.494364] __do_softirq+0x1b7/0x7d4 [ 31.494677] [ 31.494819] Last potentially related work creation: [ 31.495194] kasan_save_stack+0x22/0x50 [ 31.495578] __kasan_record_aux_stack+0x8e/0xa0 [ 31.495948] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.496432] remove_vma+0x139/0x170 [ 31.496725] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.497100] do_vmi_munmap+0x1f1/0x2b0 [ 31.497467] __vm_munmap+0x138/0x3a0 [ 31.497761] __x64_sys_munmap+0x59/0x80 [ 31.498084] do_syscall_64+0x3f/0x90 [ 31.498450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.498869] [ 31.499013] The buggy address belongs to the object at ffff88800f45f000 [ 31.499013] which belongs to the cache vm_area_struct of size 168 [ 31.499996] The buggy address is located 88 bytes inside of [ 31.499996] freed 168-byte region [ffff88800f45f000, ffff88800f45f0a8) [ 31.500988] [ 31.501132] The buggy address belongs to the physical page: [ 31.501607] page:00000000353d1f32 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf45f [ 31.502350] memcg:ffff88800e978101 [ 31.502635] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.503051] page_type: 0xffffffff() [ 31.503396] raw: 0100000000000200 ffff8880087a0c80 ffffea000026d240 dead000000000006 [ 31.503985] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e978101 [ 31.504639] page dumped because: kasan: bad access detected [ 31.505094] [ 31.505235] Memory state around the buggy address: [ 31.505659] ffff88800f45ef00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.506207] ffff88800f45ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.506809] >ffff88800f45f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.507404] ^ [ 31.507870] ffff88800f45f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.508489] ffff88800f45f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.509080] ================================================================== [ 31.509779] Disabling lock debugging due to kernel taint [ 36.708722] BUG: Bad rss-counter state mm:000000006ff569c0 type:MM_FILEPAGES val:33 [ 36.709447] BUG: Bad rss-counter state mm:000000006ff569c0 type:MM_ANONPAGES val:22 [ 37.732295] BUG: Bad rss-counter state mm:00000000f39398de type:MM_FILEPAGES val:33 [ 37.734419] BUG: Bad rss-counter state mm:00000000f39398de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23408' (ECDSA) to the list of known hosts. 2023/06/21 08:08:03 fuzzer started 2023/06/21 08:08:04 dialing manager at localhost:36067 2023/06/21 08:08:04 checking machine... 2023/06/21 08:08:04 checking revisions... [ 38.657005] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:08:04 testing simple program... [ 38.723171] cgroup: Unknown subsys name 'net' [ 38.791845] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:08:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801a29c000 RCX=ffff8880087a0500 RDX=ffffea0000365740 RSI=ffff88800dc21080 RDI=ffff88800844d8c0 RBP=0000000000000000 RSP=ffff88800fe37888 R8 =ffff88800d95dd00 R9 =0000000000000000 R10=ffffea0000370840 R11=000000000040000e R12=dffffc0000000000 R13=ffff88800fe378c8 R14=ffff8880087a0500 R15=ffff88800dc21080 RIP=ffffffff81810316 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 00007f8ea0a12900 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=00007f01652e8328 CR3=000000000f6d8000 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=00000000000000000000000000000000 XMM01=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002c5bf47 RSI=ffffffff811fc524 RDI=ffff8880162df8d0 RBP=ffff8880162df968 RSP=ffff8880162df8c8 R8 =0000000000000001 R9 =ffff8880162df910 R10=0000000000038001 R11=00000000000229a3 R12=ffff8880162df998 R13=0000000000000000 R14=ffff8880173f8000 R15=ffff88800c1e82b0 RIP=ffffffff811305de RFL=00000002 [-------] 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 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=00007ffdb97feff8 CR3=000000000ec38000 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=2033303a38303a3830203132206e754a XMM01=5d3931343433372e37332020205b203a XMM02=415f4d4d3a6570797420656438393339 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a38303a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000