syzkaller login: [ 30.677850] BUG: Bad rss-counter state mm:000000002330b21a type:MM_FILEPAGES val:33 [ 30.679051] BUG: Bad rss-counter state mm:000000002330b21a type:MM_ANONPAGES val:22 [ 30.717106] ================================================================== [ 30.718065] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.719008] Read of size 8 at addr ffff888015b23310 by task sshd/221 [ 30.719776] [ 30.720004] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.720868] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.721848] Call Trace: [ 30.722169] [ 30.722454] dump_stack_lvl+0x91/0xf0 [ 30.722951] print_report+0xcc/0x620 [ 30.723433] ? __virt_addr_valid+0x102/0x340 [ 30.723990] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.724609] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.725229] kasan_report+0xbe/0xf0 [ 30.725706] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.726328] vma_interval_tree_remove+0xc75/0xec0 [ 30.726932] vma_prepare+0xc54/0x11a0 [ 30.727412] __split_vma+0x5af/0x950 [ 30.728040] ? __pfx___split_vma+0x10/0x10 [ 30.728573] ? find_held_lock+0x2c/0x110 [ 30.729095] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.729657] ? lock_is_held_type+0x9f/0x120 [ 30.730213] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.730820] ? mtree_range_walk+0x632/0x900 [ 30.731375] ? mas_walk+0x5c7/0x7c0 [ 30.731852] do_vmi_munmap+0x1f1/0x2b0 [ 30.732361] mmap_region+0x1f9/0x2660 [ 30.732846] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.733360] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.734079] ? __pfx_lock_acquire+0x10/0x10 [ 30.734609] ? __pfx_mmap_region+0x10/0x10 [ 30.735146] ? security_mmap_addr+0x7d/0xa0 [ 30.735675] ? get_unmapped_area+0x1f5/0x3f0 [ 30.736242] do_mmap+0x854/0xf00 [ 30.736684] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.737184] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.737752] ksys_mmap_pgoff+0x3af/0x500 [ 30.738266] do_syscall_64+0x3f/0x90 [ 30.738747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.739390] RIP: 0033:0x7f3846533d82 [ 30.739845] 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 [ 30.742014] RSP: 002b:00007ffefc6ac9c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.742933] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3846533d82 [ 30.743786] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f384596d000 [ 30.744648] RBP: 00007f384596d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.745495] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f40c10eec0 [ 30.746347] R13: 00007ffefc6ac9e0 R14: 00007ffefc6aca10 R15: 00007ffefc6acd70 [ 30.747206] [ 30.747495] [ 30.747711] Allocated by task 214: [ 30.748156] kasan_save_stack+0x22/0x50 [ 30.748664] kasan_set_track+0x25/0x30 [ 30.749165] __kasan_slab_alloc+0x59/0x70 [ 30.749699] kmem_cache_alloc+0x16b/0x370 [ 30.750217] vm_area_dup+0x20/0x160 [ 30.750681] __split_vma+0x170/0x950 [ 30.751154] split_vma+0xc6/0x110 [ 30.751595] mprotect_fixup+0x8d2/0xb30 [ 30.752112] do_mprotect_pkey+0x87e/0xd40 [ 30.752639] __x64_sys_mprotect+0x78/0xc0 [ 30.753161] do_syscall_64+0x3f/0x90 [ 30.753643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754298] [ 30.754512] Freed by task 214: [ 30.754911] kasan_save_stack+0x22/0x50 [ 30.755424] kasan_set_track+0x25/0x30 [ 30.755941] kasan_save_free_info+0x2b/0x50 [ 30.756475] __kasan_slab_free+0x10a/0x190 [ 30.757015] kmem_cache_free+0x10d/0x4d0 [ 30.757526] rcu_core+0x8c8/0x2860 [ 30.757999] __do_softirq+0x1b7/0x7d4 [ 30.758509] [ 30.758730] Last potentially related work creation: [ 30.759351] kasan_save_stack+0x22/0x50 [ 30.759881] __kasan_record_aux_stack+0x8e/0xa0 [ 30.760504] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.761182] remove_vma+0x139/0x170 [ 30.761654] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.762242] do_vmi_munmap+0x1f1/0x2b0 [ 30.762762] __vm_munmap+0x138/0x3a0 [ 30.763255] __x64_sys_munmap+0x59/0x80 [ 30.763778] do_syscall_64+0x3f/0x90 [ 30.764287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.764971] [ 30.765197] The buggy address belongs to the object at ffff888015b232b8 [ 30.765197] which belongs to the cache vm_area_struct of size 168 [ 30.766771] The buggy address is located 88 bytes inside of [ 30.766771] freed 168-byte region [ffff888015b232b8, ffff888015b23360) [ 30.768297] [ 30.768521] The buggy address belongs to the physical page: [ 30.769217] page:00000000b73b56ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b23 [ 30.770388] memcg:ffff8880199ef401 [ 30.770831] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.771518] page_type: 0xffffffff() [ 30.771998] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.772974] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880199ef401 [ 30.773943] page dumped because: kasan: bad access detected [ 30.774641] [ 30.774866] Memory state around the buggy address: [ 30.775487] ffff888015b23200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.776416] ffff888015b23280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.777325] >ffff888015b23300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.778226] ^ [ 30.778720] ffff888015b23380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.779624] ffff888015b23400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.780535] ================================================================== [ 30.781639] Disabling lock debugging due to kernel taint [ 32.794687] BUG: Bad rss-counter state mm:00000000cebde906 type:MM_FILEPAGES val:33 [ 32.795678] BUG: Bad rss-counter state mm:00000000cebde906 type:MM_ANONPAGES val:22 [ 33.280561] BUG: Bad rss-counter state mm:000000006f0430c2 type:MM_FILEPAGES val:33 [ 33.281784] BUG: Bad rss-counter state mm:000000006f0430c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31248' (ECDSA) to the list of known hosts. 2023/06/21 10:37:51 fuzzer started 2023/06/21 10:37:52 dialing manager at localhost:36067 2023/06/21 10:37:52 checking machine... 2023/06/21 10:37:52 checking revisions... [ 33.892894] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:37:52 testing simple program... [ 33.942415] cgroup: Unknown subsys name 'net' [ 33.978921] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:37:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff813782f8 RDI=ffff88806ce09b6c RBP=0000000000000005 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801c977ec0 RIP=ffffffff813ad4ee RFL=00000213 [----A-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 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=00007f9b18ad66b0 CR3=000000000c6a4000 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=2031353a37333a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a37333a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff83ab1b17 RDX=ffff888016bad1c0 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88801cab7500 R8 =0000000000000000 R9 =fffffbfff0ff2fc8 R10=ffffffff87f97e43 R11=0000096900000969 R12=0000000000000000 R13=0000000000000017 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff814c0408 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 00007fc2e8cd1900 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=00007ffc4c150000 CR3=000000000e70a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000