syzkaller login: [ 30.969235] BUG: Bad rss-counter state mm:00000000bceaddb2 type:MM_FILEPAGES val:33 [ 30.971215] BUG: Bad rss-counter state mm:00000000bceaddb2 type:MM_ANONPAGES val:22 [ 31.136028] ================================================================== [ 31.136936] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.137873] Read of size 8 at addr ffff88800e316a50 by task sshd/219 [ 31.138774] [ 31.138993] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.139849] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.140835] Call Trace: [ 31.141153] [ 31.141440] dump_stack_lvl+0x91/0xf0 [ 31.141928] print_report+0xcc/0x620 [ 31.142418] ? __virt_addr_valid+0x102/0x340 [ 31.142977] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.143587] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.144200] kasan_report+0xbe/0xf0 [ 31.144685] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.145306] vma_interval_tree_remove+0xc75/0xec0 [ 31.145906] vma_prepare+0xc54/0x11a0 [ 31.146390] __split_vma+0x5af/0x950 [ 31.146890] ? __pfx___split_vma+0x10/0x10 [ 31.147422] ? find_held_lock+0x2c/0x110 [ 31.147940] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.148498] ? lock_is_held_type+0x9f/0x120 [ 31.149029] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.149632] ? mtree_range_walk+0x632/0x900 [ 31.150184] ? mas_walk+0x5c7/0x7c0 [ 31.150660] do_vmi_munmap+0x1f1/0x2b0 [ 31.151163] mmap_region+0x1f9/0x2660 [ 31.151640] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.152151] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.152866] ? __pfx_lock_acquire+0x10/0x10 [ 31.153404] ? __pfx_mmap_region+0x10/0x10 [ 31.153933] ? security_mmap_addr+0x7d/0xa0 [ 31.154466] ? get_unmapped_area+0x1f5/0x3f0 [ 31.155037] do_mmap+0x854/0xf00 [ 31.155479] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.155972] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.156531] ksys_mmap_pgoff+0x3af/0x500 [ 31.157039] do_syscall_64+0x3f/0x90 [ 31.157526] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.158164] RIP: 0033:0x7f8f14033d82 [ 31.158622] 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 [ 31.160762] RSP: 002b:00007ffe8441c748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.161676] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f14033d82 [ 31.162524] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f1346d000 [ 31.163379] RBP: 00007f8f1346d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.164224] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641d4bc8d90 [ 31.165064] R13: 00007ffe8441c760 R14: 00007ffe8441c790 R15: 00007ffe8441caf0 [ 31.165914] [ 31.166206] [ 31.166420] Allocated by task 212: [ 31.166856] kasan_save_stack+0x22/0x50 [ 31.167360] kasan_set_track+0x25/0x30 [ 31.167852] __kasan_slab_alloc+0x59/0x70 [ 31.168374] kmem_cache_alloc+0x16b/0x370 [ 31.168888] vm_area_dup+0x20/0x160 [ 31.169342] __split_vma+0x170/0x950 [ 31.169824] split_vma+0xc6/0x110 [ 31.170264] mprotect_fixup+0x8d2/0xb30 [ 31.170776] do_mprotect_pkey+0x87e/0xd40 [ 31.171296] __x64_sys_mprotect+0x78/0xc0 [ 31.171816] do_syscall_64+0x3f/0x90 [ 31.172290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.172932] [ 31.173146] Freed by task 212: [ 31.173537] kasan_save_stack+0x22/0x50 [ 31.174040] kasan_set_track+0x25/0x30 [ 31.174533] kasan_save_free_info+0x2b/0x50 [ 31.175082] __kasan_slab_free+0x10a/0x190 [ 31.175611] kmem_cache_free+0x10d/0x4d0 [ 31.176120] rcu_core+0x8c8/0x2860 [ 31.176566] __do_softirq+0x1b7/0x7d4 [ 31.177040] [ 31.177255] Last potentially related work creation: [ 31.177833] kasan_save_stack+0x22/0x50 [ 31.178341] __kasan_record_aux_stack+0x8e/0xa0 [ 31.178934] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.179571] remove_vma+0x139/0x170 [ 31.180020] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.180581] do_vmi_munmap+0x1f1/0x2b0 [ 31.181060] __vm_munmap+0x138/0x3a0 [ 31.181521] __x64_sys_munmap+0x59/0x80 [ 31.182016] do_syscall_64+0x3f/0x90 [ 31.182488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.183303] [ 31.183570] The buggy address belongs to the object at ffff88800e3169f8 [ 31.183570] which belongs to the cache vm_area_struct of size 168 [ 31.185382] The buggy address is located 88 bytes inside of [ 31.185382] freed 168-byte region [ffff88800e3169f8, ffff88800e316aa0) [ 31.187138] [ 31.187405] The buggy address belongs to the physical page: [ 31.188128] page:00000000aa9eac50 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe316 [ 31.189204] memcg:ffff88800ec0ad01 [ 31.189637] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.190274] page_type: 0xffffffff() [ 31.190731] raw: 0100000000000200 ffff88800879fc80 ffffea0000395ac0 dead000000000008 [ 31.191649] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec0ad01 [ 31.192553] page dumped because: kasan: bad access detected [ 31.193213] [ 31.193426] Memory state around the buggy address: [ 31.194005] ffff88800e316900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.194866] ffff88800e316980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.195727] >ffff88800e316a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.196582] ^ [ 31.197277] ffff88800e316a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.198141] ffff88800e316b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.199007] ================================================================== [ 31.200426] Disabling lock debugging due to kernel taint [ 33.359191] BUG: Bad rss-counter state mm:000000009f2bedb6 type:MM_FILEPAGES val:33 [ 33.360443] BUG: Bad rss-counter state mm:000000009f2bedb6 type:MM_ANONPAGES val:22 [ 33.858487] BUG: Bad rss-counter state mm:0000000062634ac4 type:MM_FILEPAGES val:33 [ 33.859666] BUG: Bad rss-counter state mm:0000000062634ac4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8945' (ECDSA) to the list of known hosts. 2023/06/20 02:54:29 fuzzer started 2023/06/20 02:54:30 dialing manager at localhost:44161 2023/06/20 02:54:30 checking machine... 2023/06/20 02:54:30 checking revisions... [ 34.681337] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:54:30 testing simple program... [ 34.718401] cgroup: Unknown subsys name 'net' [ 34.778981] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:54:22 Registers: info registers vcpu 0 RAX=ffffffff81845c80 RBX=000000000000003e RCX=ffffffff81378270 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800ebb1c60 RBP=000000000000003f RSP=ffff88806ce09e60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff88800ebb1c60 RIP=ffffffff81845c84 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 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=00007ffcabff82b8 CR3=000000000eb76000 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=2039323a34353a3230203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a34353a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff84506c7f RCX=0000000000000001 RDX=1ffff11001ba0e8d RSI=ffff88800dd07f18 RDI=ffffffff84506c7f RBP=ffffffff84506c7f RSP=ffff88800dd073c0 R8 =0000000000000001 R9 =ffff88800dd07450 R10=0000000000038001 R11=000000000008abed R12=0000000000000001 R13=0000000000000000 R14=ffff88800db63680 R15=ffff888016c20720 RIP=ffffffff811fc772 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 00007f10f7a8d900 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=00007f10f8044618 CR3=000000000dc86000 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