syzkaller login: [ 43.496571] BUG: Bad rss-counter state mm:000000009bf51c98 type:MM_FILEPAGES val:33 [ 43.497839] BUG: Bad rss-counter state mm:000000009bf51c98 type:MM_ANONPAGES val:22 [ 43.663953] ================================================================== [ 43.665303] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.666525] Read of size 8 at addr ffff88800f69a6b0 by task sshd/220 [ 43.667413] [ 43.667667] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.668660] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.669795] Call Trace: [ 43.670164] [ 43.670494] dump_stack_lvl+0x91/0xf0 [ 43.671059] print_report+0xcc/0x620 [ 43.671609] ? __virt_addr_valid+0x102/0x340 [ 43.672243] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.672956] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.673712] kasan_report+0xbe/0xf0 [ 43.674278] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.675017] vma_interval_tree_remove+0xc75/0xec0 [ 43.675722] vma_prepare+0xc54/0x11a0 [ 43.676289] __split_vma+0x5af/0x950 [ 43.676848] ? __pfx___split_vma+0x10/0x10 [ 43.677487] ? find_held_lock+0x2c/0x110 [ 43.678110] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.678780] ? lock_is_held_type+0x9f/0x120 [ 43.679421] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.680159] ? mtree_range_walk+0x632/0x900 [ 43.680818] ? mas_walk+0x5c7/0x7c0 [ 43.681390] do_vmi_munmap+0x1f1/0x2b0 [ 43.681979] mmap_region+0x1f9/0x2660 [ 43.682548] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.683157] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.684003] ? __pfx_lock_acquire+0x10/0x10 [ 43.684629] ? __pfx_mmap_region+0x10/0x10 [ 43.685263] ? security_mmap_addr+0x7d/0xa0 [ 43.685884] ? get_unmapped_area+0x1f5/0x3f0 [ 43.686525] do_mmap+0x854/0xf00 [ 43.687039] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.687620] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.688277] ksys_mmap_pgoff+0x3af/0x500 [ 43.688870] do_syscall_64+0x3f/0x90 [ 43.689439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.690193] RIP: 0033:0x7f3661363d82 [ 43.690727] 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 [ 43.693229] RSP: 002b:00007ffcca00a798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.694288] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3661363d82 [ 43.695285] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f366079d000 [ 43.696281] RBP: 00007f366079d000 R08: 0000000000000009 R09: 0000000000001000 [ 43.697283] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647f0fe9d90 [ 43.698273] R13: 00007ffcca00a7b0 R14: 00007ffcca00a7e0 R15: 00007ffcca00ab40 [ 43.699266] [ 43.699606] [ 43.699853] Allocated by task 213: [ 43.700347] kasan_save_stack+0x22/0x50 [ 43.700932] kasan_set_track+0x25/0x30 [ 43.701518] __kasan_slab_alloc+0x59/0x70 [ 43.702130] kmem_cache_alloc+0x16b/0x370 [ 43.702733] vm_area_dup+0x20/0x160 [ 43.703259] __split_vma+0x170/0x950 [ 43.703802] split_vma+0xc6/0x110 [ 43.704311] mprotect_fixup+0x8d2/0xb30 [ 43.704891] do_mprotect_pkey+0x87e/0xd40 [ 43.705519] __x64_sys_mprotect+0x78/0xc0 [ 43.706122] do_syscall_64+0x3f/0x90 [ 43.706748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.707492] [ 43.707741] Freed by task 213: [ 43.708195] kasan_save_stack+0x22/0x50 [ 43.708778] kasan_set_track+0x25/0x30 [ 43.709356] kasan_save_free_info+0x2b/0x50 [ 43.709976] __kasan_slab_free+0x10a/0x190 [ 43.710595] kmem_cache_free+0x10d/0x4d0 [ 43.711183] rcu_core+0x8c8/0x2860 [ 43.711700] __do_softirq+0x1b7/0x7d4 [ 43.712259] [ 43.712507] Last potentially related work creation: [ 43.713182] kasan_save_stack+0x22/0x50 [ 43.713768] __kasan_record_aux_stack+0x8e/0xa0 [ 43.714431] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.715170] remove_vma+0x139/0x170 [ 43.715691] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.716343] do_vmi_munmap+0x1f1/0x2b0 [ 43.716906] __vm_munmap+0x138/0x3a0 [ 43.717461] __x64_sys_munmap+0x59/0x80 [ 43.718032] do_syscall_64+0x3f/0x90 [ 43.718576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.719322] [ 43.719570] Second to last potentially related work creation: [ 43.720363] kasan_save_stack+0x22/0x50 [ 43.720942] __kasan_record_aux_stack+0x8e/0xa0 [ 43.721620] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.722360] remove_vma+0x139/0x170 [ 43.722876] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.723522] do_vmi_munmap+0x1f1/0x2b0 [ 43.724084] mmap_region+0x1f9/0x2660 [ 43.724637] do_mmap+0x854/0xf00 [ 43.725155] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.725722] ksys_mmap_pgoff+0x3af/0x500 [ 43.726306] do_syscall_64+0x3f/0x90 [ 43.726848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.727584] [ 43.727826] The buggy address belongs to the object at ffff88800f69a658 [ 43.727826] which belongs to the cache vm_area_struct of size 168 [ 43.729516] The buggy address is located 88 bytes inside of [ 43.729516] freed 168-byte region [ffff88800f69a658, ffff88800f69a700) [ 43.731456] [ 43.731703] The buggy address belongs to the physical page: [ 43.732455] page:0000000023e33173 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf69a [ 43.733728] memcg:ffff88800f119b01 [ 43.734212] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.734958] page_type: 0xffffffff() [ 43.735481] raw: 0100000000000200 ffff88800879fc80 ffffea0000315f00 dead000000000002 [ 43.736533] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f119b01 [ 43.737576] page dumped because: kasan: bad access detected [ 43.738508] [ 43.738777] Memory state around the buggy address: [ 43.739453] ffff88800f69a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.740654] ffff88800f69a600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 43.741772] >ffff88800f69a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.742851] ^ [ 43.743617] ffff88800f69a700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 43.744697] ffff88800f69a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 43.745866] ================================================================== [ 43.747013] Disabling lock debugging due to kernel taint [ 46.647580] BUG: Bad rss-counter state mm:000000004dc5ae94 type:MM_FILEPAGES val:33 [ 46.648386] BUG: Bad rss-counter state mm:000000004dc5ae94 type:MM_ANONPAGES val:22 [ 47.110884] BUG: Bad rss-counter state mm:00000000ae24f4a1 type:MM_FILEPAGES val:33 [ 47.111979] BUG: Bad rss-counter state mm:00000000ae24f4a1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3498' (ECDSA) to the list of known hosts. 2023/06/19 16:58:22 fuzzer started 2023/06/19 16:58:22 dialing manager at localhost:44161 2023/06/19 16:58:22 checking machine... 2023/06/19 16:58:22 checking revisions... [ 47.825874] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:58:22 testing simple program... [ 47.883628] cgroup: Unknown subsys name 'net' [ 47.923791] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:58:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b2098 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800f287900 RSP=ffff88800f287838 R8 =ffffffff863b209c R9 =ffff88800f2878e8 R10=0000000000038001 R11=000000000008aa22 R12=ffff88800f287908 R13=ffff88800f2878f0 R14=ffff88800f287dd8 R15=ffff88800f2878a8 RIP=ffffffff81130bb0 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 00007f7aad63b900 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=00005570bd4e3568 CR3=0000000016820000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8614cd87 RBX=0000000000000001 RCX=ffffffff8614cd84 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8614cd86 RBP=ffff888016c1f680 RSP=ffff888016c1f5b8 R8 =1ffffffff0c299b0 R9 =ffff888016c1f668 R10=0000000000038001 R11=00000000000246f4 R12=ffff888016c1f688 R13=ffff888016c1f670 R14=ffff888016c1fbe8 R15=ffff888016c1f628 RIP=ffffffff811311d7 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 00007f2876748700 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=00007ffeb1fd25a8 CR3=0000000019e86000 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=2032323a38353a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a38353a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000