syzkaller login: [ 31.121601] BUG: Bad rss-counter state mm:0000000036e5251f type:MM_FILEPAGES val:33 [ 31.122894] BUG: Bad rss-counter state mm:0000000036e5251f type:MM_ANONPAGES val:22 [ 31.253148] ================================================================== [ 31.254108] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.255070] Read of size 8 at addr ffff88800dad36b0 by task sshd/221 [ 31.255841] [ 31.256192] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.257071] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.258054] Call Trace: [ 31.258475] [ 31.258835] dump_stack_lvl+0x91/0xf0 [ 31.259485] print_report+0xcc/0x620 [ 31.260127] ? __virt_addr_valid+0x102/0x340 [ 31.260866] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.261693] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.262560] kasan_report+0xbe/0xf0 [ 31.263133] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.263789] vma_interval_tree_remove+0xc75/0xec0 [ 31.264405] vma_prepare+0xc54/0x11a0 [ 31.264911] __split_vma+0x5af/0x950 [ 31.265389] ? __pfx___split_vma+0x10/0x10 [ 31.265939] ? find_held_lock+0x2c/0x110 [ 31.266505] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.267085] ? lock_is_held_type+0x9f/0x120 [ 31.267655] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.268292] ? mtree_range_walk+0x632/0x900 [ 31.268884] ? mas_walk+0x5c7/0x7c0 [ 31.269390] do_vmi_munmap+0x1f1/0x2b0 [ 31.269898] mmap_region+0x1f9/0x2660 [ 31.270404] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.270953] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.271693] ? __pfx_lock_acquire+0x10/0x10 [ 31.272255] ? __pfx_mmap_region+0x10/0x10 [ 31.272824] ? security_mmap_addr+0x7d/0xa0 [ 31.273364] ? get_unmapped_area+0x1f5/0x3f0 [ 31.273943] do_mmap+0x854/0xf00 [ 31.274425] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.274944] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.275547] ksys_mmap_pgoff+0x3af/0x500 [ 31.276077] do_syscall_64+0x3f/0x90 [ 31.276590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.277268] RIP: 0033:0x7f3c5fa1cd82 [ 31.277746] 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 [ 31.279982] RSP: 002b:00007ffd9ec83bf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.280954] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c5fa1cd82 [ 31.281851] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c5ee56000 [ 31.282756] RBP: 00007f3c5ee56000 R08: 0000000000000009 R09: 0000000000001000 [ 31.283626] R10: 0000000000000812 R11: 0000000000000206 R12: 00005612f8773b20 [ 31.284512] R13: 00007ffd9ec83c10 R14: 00007ffd9ec83c40 R15: 00007ffd9ec83fa0 [ 31.285387] [ 31.285702] [ 31.285927] Allocated by task 214: [ 31.286380] kasan_save_stack+0x22/0x50 [ 31.286918] kasan_set_track+0x25/0x30 [ 31.287442] __kasan_slab_alloc+0x59/0x70 [ 31.288002] kmem_cache_alloc+0x16b/0x370 [ 31.288558] vm_area_dup+0x20/0x160 [ 31.289033] __split_vma+0x170/0x950 [ 31.289547] split_vma+0xc6/0x110 [ 31.290007] mprotect_fixup+0x8d2/0xb30 [ 31.290569] do_mprotect_pkey+0x87e/0xd40 [ 31.291100] __x64_sys_mprotect+0x78/0xc0 [ 31.291653] do_syscall_64+0x3f/0x90 [ 31.292146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.292838] [ 31.293062] Freed by task 19: [ 31.293473] kasan_save_stack+0x22/0x50 [ 31.294007] kasan_set_track+0x25/0x30 [ 31.294556] kasan_save_free_info+0x2b/0x50 [ 31.295099] __kasan_slab_free+0x10a/0x190 [ 31.295666] kmem_cache_free+0x10d/0x4d0 [ 31.296195] rcu_core+0x8c8/0x2860 [ 31.296729] __do_softirq+0x1b7/0x7d4 [ 31.297351] [ 31.297602] Last potentially related work creation: [ 31.298200] kasan_save_stack+0x22/0x50 [ 31.298746] __kasan_record_aux_stack+0x8e/0xa0 [ 31.299335] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.300000] remove_vma+0x139/0x170 [ 31.300477] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.301057] do_vmi_munmap+0x1f1/0x2b0 [ 31.301572] __vm_munmap+0x138/0x3a0 [ 31.302053] __x64_sys_munmap+0x59/0x80 [ 31.302605] do_syscall_64+0x3f/0x90 [ 31.303086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.303764] [ 31.303996] The buggy address belongs to the object at ffff88800dad3658 [ 31.303996] which belongs to the cache vm_area_struct of size 168 [ 31.305526] The buggy address is located 88 bytes inside of [ 31.305526] freed 168-byte region [ffff88800dad3658, ffff88800dad3700) [ 31.306992] [ 31.307224] The buggy address belongs to the physical page: [ 31.307923] page:00000000491c116c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdad3 [ 31.309037] memcg:ffff8880168aba01 [ 31.309496] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.310149] page_type: 0xffffffff() [ 31.310649] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.311611] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168aba01 [ 31.312551] page dumped because: kasan: bad access detected [ 31.313220] [ 31.313447] Memory state around the buggy address: [ 31.314049] ffff88800dad3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.314971] ffff88800dad3600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.315879] >ffff88800dad3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.316779] ^ [ 31.317378] ffff88800dad3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.318274] ffff88800dad3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.319167] ================================================================== [ 31.320293] Disabling lock debugging due to kernel taint [ 34.042072] BUG: Bad rss-counter state mm:00000000ec23fda1 type:MM_FILEPAGES val:33 [ 34.043305] BUG: Bad rss-counter state mm:00000000ec23fda1 type:MM_ANONPAGES val:22 [ 34.488733] BUG: Bad rss-counter state mm:00000000e5775b62 type:MM_FILEPAGES val:33 [ 34.489913] BUG: Bad rss-counter state mm:00000000e5775b62 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62645' (ECDSA) to the list of known hosts. 2023/06/19 18:03:06 fuzzer started 2023/06/19 18:03:07 dialing manager at localhost:44161 2023/06/19 18:03:07 checking machine... 2023/06/19 18:03:07 checking revisions... [ 35.172203] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:03:07 testing simple program... [ 35.226941] cgroup: Unknown subsys name 'net' [ 35.358313] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:03:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000200 RCX=0000000000000004 RDX=1ffff1100d9c6c39 RSI=ffffffff81835470 RDI=ffff88806ce361a0 RBP=0000000000000000 RSP=ffff8880146cf4a8 R8 =ffff88806ce361c8 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=ffff888010372000 R14=ffff88806ce361a0 R15=ffff88806ce361c8 RIP=ffffffff812d8610 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 00007fb3aad98900 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=000055d6a39a6768 CR3=000000000c528000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=0eeeb5bb4959213100000000000ae988 XMM05=c59cc0c369acb8010000000000135750 XMM06=c291bd5c70af25b900000000001347f0 XMM07=fb795ef6d65770560000000000124d70 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff83c632d1 RDX=ffff888015e01b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016fd76a0 R8 =0000000000000005 R9 =00000000000000ff R10=000000000000001a R11=0000098900000989 R12=0000000000000000 R13=000000000000001a R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c07eb RFL=00000283 [--S---C] 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 00007f73fa751900 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=00007f73fad08618 CR3=000000000c4b6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000