syzkaller login: [ 30.543472] BUG: Bad rss-counter state mm:000000002477b6f4 type:MM_FILEPAGES val:33 [ 30.545052] BUG: Bad rss-counter state mm:000000002477b6f4 type:MM_ANONPAGES val:22 [ 30.716430] ================================================================== [ 30.717340] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.718308] Read of size 8 at addr ffff888018e03c20 by task sshd/221 [ 30.719102] [ 30.719423] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.720293] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.721283] Call Trace: [ 30.721746] [ 30.722087] dump_stack_lvl+0x91/0xf0 [ 30.722671] print_report+0xcc/0x620 [ 30.723249] ? __virt_addr_valid+0x102/0x340 [ 30.723900] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.724629] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.725375] kasan_report+0xbe/0xf0 [ 30.725955] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.726726] vma_interval_tree_remove+0xc75/0xec0 [ 30.727465] vma_prepare+0xc54/0x11a0 [ 30.728064] __split_vma+0x5af/0x950 [ 30.728643] ? __pfx___split_vma+0x10/0x10 [ 30.729287] ? find_held_lock+0x2c/0x110 [ 30.729956] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.730527] ? lock_is_held_type+0x9f/0x120 [ 30.731080] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.731680] ? mtree_range_walk+0x632/0x900 [ 30.732234] ? mas_walk+0x5c7/0x7c0 [ 30.732710] do_vmi_munmap+0x1f1/0x2b0 [ 30.733204] mmap_region+0x1f9/0x2660 [ 30.733705] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.734218] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.734932] ? __pfx_lock_acquire+0x10/0x10 [ 30.735472] ? __pfx_mmap_region+0x10/0x10 [ 30.736001] ? security_mmap_addr+0x7d/0xa0 [ 30.736536] ? get_unmapped_area+0x1f5/0x3f0 [ 30.737084] do_mmap+0x854/0xf00 [ 30.737531] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.738018] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.738570] ksys_mmap_pgoff+0x3af/0x500 [ 30.739084] do_syscall_64+0x3f/0x90 [ 30.739563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.740224] RIP: 0033:0x7f453ce78d82 [ 30.740678] 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 [ 30.742828] RSP: 002b:00007ffd108cef88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.743724] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f453ce78d82 [ 30.744575] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f453c2b2000 [ 30.745434] RBP: 00007f453c2b2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.746281] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556862dc3ec0 [ 30.747121] R13: 00007ffd108cefa0 R14: 00007ffd108cefd0 R15: 00007ffd108cf330 [ 30.747975] [ 30.748269] [ 30.748482] Allocated by task 214: [ 30.748908] kasan_save_stack+0x22/0x50 [ 30.749410] kasan_set_track+0x25/0x30 [ 30.749944] __kasan_slab_alloc+0x59/0x70 [ 30.750461] kmem_cache_alloc+0x16b/0x370 [ 30.750974] vm_area_dup+0x20/0x160 [ 30.751427] __split_vma+0x170/0x950 [ 30.751898] split_vma+0xc6/0x110 [ 30.752335] mprotect_fixup+0x8d2/0xb30 [ 30.752845] do_mprotect_pkey+0x87e/0xd40 [ 30.753388] __x64_sys_mprotect+0x78/0xc0 [ 30.753932] do_syscall_64+0x3f/0x90 [ 30.754407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.755046] [ 30.755261] Freed by task 204: [ 30.755651] kasan_save_stack+0x22/0x50 [ 30.756161] kasan_set_track+0x25/0x30 [ 30.756658] kasan_save_free_info+0x2b/0x50 [ 30.757194] __kasan_slab_free+0x10a/0x190 [ 30.757742] kmem_cache_free+0x10d/0x4d0 [ 30.758257] rcu_core+0x8c8/0x2860 [ 30.758706] __do_softirq+0x1b7/0x7d4 [ 30.759189] [ 30.759405] Last potentially related work creation: [ 30.760004] kasan_save_stack+0x22/0x50 [ 30.760509] __kasan_record_aux_stack+0x8e/0xa0 [ 30.761083] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.761743] remove_vma+0x139/0x170 [ 30.762192] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.762749] do_vmi_munmap+0x1f1/0x2b0 [ 30.763234] __vm_munmap+0x138/0x3a0 [ 30.763702] __x64_sys_munmap+0x59/0x80 [ 30.764198] do_syscall_64+0x3f/0x90 [ 30.764672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.765318] [ 30.765547] The buggy address belongs to the object at ffff888018e03bc8 [ 30.765547] which belongs to the cache vm_area_struct of size 168 [ 30.767011] The buggy address is located 88 bytes inside of [ 30.767011] freed 168-byte region [ffff888018e03bc8, ffff888018e03c70) [ 30.768438] [ 30.768655] The buggy address belongs to the physical page: [ 30.769310] page:00000000bfb7a13a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e03 [ 30.770414] memcg:ffff88800fef6b01 [ 30.770836] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.771483] page_type: 0xffffffff() [ 30.771938] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.772853] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fef6b01 [ 30.773775] page dumped because: kasan: bad access detected [ 30.774431] [ 30.774647] Memory state around the buggy address: [ 30.775227] ffff888018e03b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.776075] ffff888018e03b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.776930] >ffff888018e03c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.777793] ^ [ 30.778321] ffff888018e03c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.779187] ffff888018e03d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.780027] ================================================================== [ 30.781142] Disabling lock debugging due to kernel taint [ 32.603294] BUG: Bad rss-counter state mm:00000000d68bc980 type:MM_FILEPAGES val:33 [ 32.604298] BUG: Bad rss-counter state mm:00000000d68bc980 type:MM_ANONPAGES val:22 [ 33.035889] BUG: Bad rss-counter state mm:000000000a027e72 type:MM_FILEPAGES val:33 [ 33.036958] BUG: Bad rss-counter state mm:000000000a027e72 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45535' (ECDSA) to the list of known hosts. 2023/06/20 16:36:06 fuzzer started 2023/06/20 16:36:06 dialing manager at localhost:36067 2023/06/20 16:36:06 checking machine... 2023/06/20 16:36:06 checking revisions... [ 33.796455] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:36:06 testing simple program... [ 33.851613] cgroup: Unknown subsys name 'net' [ 33.894727] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:36:06 Registers: info registers vcpu 0 RAX=ffffffff8614ed13 RBX=0000000000000001 RCX=ffffffff8614ed0e RDX=0000000000000002 RSI=0000000000000003 RDI=ffffffff85e0c99c RBP=ffff888016ec7b08 RSP=ffff888016ec7a40 R8 =ffffffff8614eccc R9 =ffff888016ec7af0 R10=0000000000038001 R11=00000000000247f6 R12=ffff888016ec7b10 R13=ffff888016ec7af8 R14=ffff888016ec7af1 R15=ffff888016ec7ab0 RIP=ffffffff81130a72 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 00007f9bbedf6900 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=00007f9bbf3ae0b0 CR3=0000000016460000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=ffffffff813ad470 RCX=ffffffff860d8201 RDX=ffff88806cf09bd8 RSI=0000000000000000 RDI=ffff88806cf09a98 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =ffffffff860d825a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800e2e7d90 RIP=ffffffff81130340 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 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=00007fc3b2270bb0 CR3=000000000d556000 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=56122fdeca1ff991044fc641e5767a79 XMM02=0000000000119a80ec2efd57dc4c00df XMM03=00000000001212f0365ef12a66d33519 XMM04=521e990bb6e96e3600000000000ae988 XMM05=e4cb8bb95a7664b600000000001310b0 XMM06=2daa1e7eeda82b07000000000012ff18 XMM07=e042d86d42eb936e0000000000121570 XMM08=365ef12a66d335190000000000119ae0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000