syzkaller login: [ 107.690867] BUG: Bad rss-counter state mm:000000001453af50 type:MM_FILEPAGES val:33 [ 107.692218] BUG: Bad rss-counter state mm:000000001453af50 type:MM_ANONPAGES val:22 [ 107.831393] ================================================================== [ 107.832221] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 107.832996] Read of size 8 at addr ffff88801a48dc20 by task sshd/219 [ 107.833631] [ 107.833812] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 107.834817] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 107.835627] Call Trace: [ 107.835896] [ 107.836154] dump_stack_lvl+0x91/0xf0 [ 107.836563] print_report+0xcc/0x620 [ 107.836990] ? __virt_addr_valid+0x102/0x340 [ 107.837453] ? vma_interval_tree_remove+0xc75/0xec0 [ 107.837947] ? vma_interval_tree_remove+0xc75/0xec0 [ 107.838389] kasan_report+0xbe/0xf0 [ 107.838725] ? vma_interval_tree_remove+0xc75/0xec0 [ 107.839163] vma_interval_tree_remove+0xc75/0xec0 [ 107.839583] vma_prepare+0xc54/0x11a0 [ 107.839931] __split_vma+0x5af/0x950 [ 107.840301] ? __pfx___split_vma+0x10/0x10 [ 107.840683] ? find_held_lock+0x2c/0x110 [ 107.841063] do_vmi_align_munmap+0x2ba/0x11f0 [ 107.841462] ? lock_is_held_type+0x9f/0x120 [ 107.841836] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 107.842270] ? mtree_range_walk+0x632/0x900 [ 107.842659] ? mas_walk+0x5c7/0x7c0 [ 107.842990] do_vmi_munmap+0x1f1/0x2b0 [ 107.843337] mmap_region+0x1f9/0x2660 [ 107.843683] ? vm_mmap_pgoff+0x15c/0x3a0 [ 107.844043] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 107.844571] ? __pfx_lock_acquire+0x10/0x10 [ 107.844946] ? __pfx_mmap_region+0x10/0x10 [ 107.845322] ? security_mmap_addr+0x7d/0xa0 [ 107.845698] ? get_unmapped_area+0x1f5/0x3f0 [ 107.846085] do_mmap+0x854/0xf00 [ 107.846389] vm_mmap_pgoff+0x1a6/0x3a0 [ 107.846734] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 107.847121] ksys_mmap_pgoff+0x3af/0x500 [ 107.847480] do_syscall_64+0x3f/0x90 [ 107.847818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 107.848326] RIP: 0033:0x7f59f6cbbd82 [ 107.848657] 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 [ 107.850168] RSP: 002b:00007ffd0306ca58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 107.850807] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f59f6cbbd82 [ 107.851412] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f59f60f5000 [ 107.852021] RBP: 00007f59f60f5000 R08: 0000000000000009 R09: 0000000000001000 [ 107.852648] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555578598ec0 [ 107.853241] R13: 00007ffd0306ca70 R14: 00007ffd0306caa0 R15: 00007ffd0306ce00 [ 107.853850] [ 107.854078] [ 107.854229] Allocated by task 212: [ 107.854535] kasan_save_stack+0x22/0x50 [ 107.854896] kasan_set_track+0x25/0x30 [ 107.855256] __kasan_slab_alloc+0x59/0x70 [ 107.855623] kmem_cache_alloc+0x16b/0x370 [ 107.855992] vm_area_dup+0x20/0x160 [ 107.856314] __split_vma+0x170/0x950 [ 107.856647] split_vma+0xc6/0x110 [ 107.856964] mprotect_fixup+0x8d2/0xb30 [ 107.857317] do_mprotect_pkey+0x87e/0xd40 [ 107.857691] __x64_sys_mprotect+0x78/0xc0 [ 107.858052] do_syscall_64+0x3f/0x90 [ 107.858387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 107.858836] [ 107.858988] Freed by task 203: [ 107.859261] kasan_save_stack+0x22/0x50 [ 107.859616] kasan_set_track+0x25/0x30 [ 107.859967] kasan_save_free_info+0x2b/0x50 [ 107.860361] __kasan_slab_free+0x10a/0x190 [ 107.860734] kmem_cache_free+0x10d/0x4d0 [ 107.861091] rcu_core+0x8c8/0x2860 [ 107.861404] __do_softirq+0x1b7/0x7d4 [ 107.861739] [ 107.861890] Last potentially related work creation: [ 107.862304] kasan_save_stack+0x22/0x50 [ 107.862655] __kasan_record_aux_stack+0x8e/0xa0 [ 107.863068] __call_rcu_common.constprop.0+0x6a/0xb90 [ 107.863522] remove_vma+0x139/0x170 [ 107.863847] do_vmi_align_munmap+0xd4a/0x11f0 [ 107.864248] do_vmi_munmap+0x1f1/0x2b0 [ 107.864590] __vm_munmap+0x138/0x3a0 [ 107.864917] __x64_sys_munmap+0x59/0x80 [ 107.865261] do_syscall_64+0x3f/0x90 [ 107.865595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 107.866055] [ 107.866202] The buggy address belongs to the object at ffff88801a48dbc8 [ 107.866202] which belongs to the cache vm_area_struct of size 168 [ 107.867244] The buggy address is located 88 bytes inside of [ 107.867244] freed 168-byte region [ffff88801a48dbc8, ffff88801a48dc70) [ 107.868249] [ 107.868401] The buggy address belongs to the physical page: [ 107.868875] page:000000008ac192cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a48d [ 107.869656] memcg:ffff88801a48e001 [ 107.869960] flags: 0x100000000000200(slab|node=0|zone=1) [ 107.870421] page_type: 0xffffffff() [ 107.870740] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 107.871385] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a48e001 [ 107.872028] page dumped because: kasan: bad access detected [ 107.872510] [ 107.872664] Memory state around the buggy address: [ 107.873076] ffff88801a48db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 107.873674] ffff88801a48db80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 107.874279] >ffff88801a48dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 107.874887] ^ [ 107.875269] ffff88801a48dc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 107.875864] ffff88801a48dd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 107.876491] ================================================================== [ 107.877227] Disabling lock debugging due to kernel taint [ 109.945970] BUG: Bad rss-counter state mm:00000000e2a8e0c6 type:MM_FILEPAGES val:33 [ 109.947101] BUG: Bad rss-counter state mm:00000000e2a8e0c6 type:MM_ANONPAGES val:22 [ 110.370847] BUG: Bad rss-counter state mm:00000000b9a10755 type:MM_FILEPAGES val:33 [ 110.372023] BUG: Bad rss-counter state mm:00000000b9a10755 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10411' (ECDSA) to the list of known hosts. 2023/06/20 09:38:18 fuzzer started 2023/06/20 09:38:18 dialing manager at localhost:44161 2023/06/20 09:38:18 checking machine... 2023/06/20 09:38:18 checking revisions... [ 111.108263] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:38:18 testing simple program... [ 111.152109] cgroup: Unknown subsys name 'net' [ 111.207180] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:37:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff87f94640 RCX=0000000000000000 RDX=ffff888017ecb680 RSI=ffffffff83c6316a RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880158bf6a0 R8 =0000000000000005 R9 =00000000000000ff R10=0000000000000078 R11=000024b4000024b4 R12=0000000000000000 R13=0000000000000078 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c081b 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 00007f14504e4900 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=00007f1450a9b618 CR3=000000000e13a000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff8118ddc3 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a88 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800df6e8d0 RIP=ffffffff813ad42f RFL=00000286 [--S--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 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=00007f8f1c8bc1d0 CR3=000000000cb40000 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=603bb5c460c6229bbd408a88e69235ec XMM02=00000000001266f0eff9b2d0a8fce9cb XMM03=00000000001267c02c67c8bc2e329bc3 XMM04=93f849f75732e26900000000000ae988 XMM05=dfcdbad4f1609c37000000000013c7b0 XMM06=8c39a763de8ab9dc000000000013b988 XMM07=e042d86d42eb936e000000000012d400 XMM08=69f4f8a73ff4ef7300000000001267c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000