syzkaller login: [ 33.291509] BUG: Bad rss-counter state mm:0000000000274c8e type:MM_FILEPAGES val:33 [ 33.292778] BUG: Bad rss-counter state mm:0000000000274c8e type:MM_ANONPAGES val:22 [ 33.334489] ================================================================== [ 33.335669] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.336897] Read of size 8 at addr ffff888013a513f8 by task sshd/221 [ 33.337910] [ 33.338190] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.339301] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.340523] Call Trace: [ 33.340938] [ 33.341325] dump_stack_lvl+0x91/0xf0 [ 33.341902] print_report+0xcc/0x620 [ 33.342472] ? __virt_addr_valid+0x102/0x340 [ 33.343158] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.343912] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.344701] kasan_report+0xbe/0xf0 [ 33.345257] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.345942] vma_interval_tree_remove+0xc75/0xec0 [ 33.346608] vma_prepare+0xc54/0x11a0 [ 33.347150] __split_vma+0x5af/0x950 [ 33.347681] ? __pfx___split_vma+0x10/0x10 [ 33.348266] ? find_held_lock+0x2c/0x110 [ 33.348849] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.349476] ? lock_is_held_type+0x9f/0x120 [ 33.350077] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.350757] ? mtree_range_walk+0x632/0x900 [ 33.351370] ? mas_walk+0x5c7/0x7c0 [ 33.351896] do_vmi_munmap+0x1f1/0x2b0 [ 33.352445] mmap_region+0x1f9/0x2660 [ 33.352978] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.353551] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.354352] ? __pfx_lock_acquire+0x10/0x10 [ 33.354956] ? __pfx_mmap_region+0x10/0x10 [ 33.355543] ? security_mmap_addr+0x7d/0xa0 [ 33.356130] ? get_unmapped_area+0x1f5/0x3f0 [ 33.356736] do_mmap+0x854/0xf00 [ 33.357227] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.357775] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.358398] ksys_mmap_pgoff+0x3af/0x500 [ 33.358976] do_syscall_64+0x3f/0x90 [ 33.359500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.360219] RIP: 0033:0x7f5543868d82 [ 33.360725] 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 [ 33.363083] RSP: 002b:00007fff91d4d018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.364077] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5543868d82 [ 33.365012] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5542ca2000 [ 33.365942] RBP: 00007f5542ca2000 R08: 0000000000000009 R09: 0000000000001000 [ 33.366880] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d19db3b20 [ 33.367810] R13: 00007fff91d4d030 R14: 00007fff91d4d060 R15: 00007fff91d4d3c0 [ 33.368755] [ 33.369076] [ 33.369310] Allocated by task 214: [ 33.369779] kasan_save_stack+0x22/0x50 [ 33.370340] kasan_set_track+0x25/0x30 [ 33.370905] __kasan_slab_alloc+0x59/0x70 [ 33.371490] kmem_cache_alloc+0x16b/0x370 [ 33.372073] vm_area_dup+0x20/0x160 [ 33.372577] __split_vma+0x170/0x950 [ 33.373108] split_vma+0xc6/0x110 [ 33.373601] mprotect_fixup+0x8d2/0xb30 [ 33.374153] do_mprotect_pkey+0x87e/0xd40 [ 33.374730] __x64_sys_mprotect+0x78/0xc0 [ 33.375316] do_syscall_64+0x3f/0x90 [ 33.375837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.376540] [ 33.376776] Freed by task 214: [ 33.377208] kasan_save_stack+0x22/0x50 [ 33.377757] kasan_set_track+0x25/0x30 [ 33.378305] kasan_save_free_info+0x2b/0x50 [ 33.378900] __kasan_slab_free+0x10a/0x190 [ 33.379541] kmem_cache_free+0x10d/0x4d0 [ 33.380118] rcu_core+0x8c8/0x2860 [ 33.380606] __do_softirq+0x1b7/0x7d4 [ 33.381135] [ 33.381369] Last potentially related work creation: [ 33.382013] kasan_save_stack+0x22/0x50 [ 33.382570] __kasan_record_aux_stack+0x8e/0xa0 [ 33.383205] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.383905] remove_vma+0x139/0x170 [ 33.384405] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.385012] do_vmi_munmap+0x1f1/0x2b0 [ 33.385543] __vm_munmap+0x138/0x3a0 [ 33.386052] __x64_sys_munmap+0x59/0x80 [ 33.386601] do_syscall_64+0x3f/0x90 [ 33.387129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.387829] [ 33.388064] The buggy address belongs to the object at ffff888013a513a0 [ 33.388064] which belongs to the cache vm_area_struct of size 168 [ 33.389685] The buggy address is located 88 bytes inside of [ 33.389685] freed 168-byte region [ffff888013a513a0, ffff888013a51448) [ 33.391242] [ 33.391479] The buggy address belongs to the physical page: [ 33.392200] page:0000000078e681a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13a51 [ 33.393397] memcg:ffff88801a2c9301 [ 33.393866] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.394572] page_type: 0xffffffff() [ 33.395073] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.396080] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2c9301 [ 33.397071] page dumped because: kasan: bad access detected [ 33.397790] [ 33.398025] Memory state around the buggy address: [ 33.398658] ffff888013a51280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.399616] ffff888013a51300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.400557] >ffff888013a51380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.401494] ^ [ 33.402418] ffff888013a51400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.403372] ffff888013a51480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.404309] ================================================================== [ 33.405336] Disabling lock debugging due to kernel taint [ 35.815054] BUG: Bad rss-counter state mm:00000000ec74867e type:MM_FILEPAGES val:33 [ 35.816250] BUG: Bad rss-counter state mm:00000000ec74867e type:MM_ANONPAGES val:22 [ 36.207039] BUG: Bad rss-counter state mm:0000000014959c99 type:MM_FILEPAGES val:33 [ 36.208267] BUG: Bad rss-counter state mm:0000000014959c99 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15482' (ECDSA) to the list of known hosts. 2023/06/20 08:28:07 fuzzer started 2023/06/20 08:28:08 dialing manager at localhost:44161 2023/06/20 08:28:08 checking machine... 2023/06/20 08:28:08 checking revisions... [ 36.936856] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:28:08 testing simple program... [ 36.993489] cgroup: Unknown subsys name 'net' [ 37.056253] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:28:05 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=0000560a2ab8eb40 CR3=0000000016b06000 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=2037303a38323a3830203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a38323a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000005 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000006 RSP=ffff88806cf09e48 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=dffffc0000000000 R13=ffffffff81378294 R14=ffff88806cf35000 R15=ffff88800d6bdb80 RIP=ffffffff812d8a0e 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 00007f29a66c0900 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=00007f29a6c77618 CR3=000000001915a000 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