syzkaller login: [ 30.290831] BUG: Bad rss-counter state mm:00000000eb3604d9 type:MM_FILEPAGES val:33 [ 30.292176] BUG: Bad rss-counter state mm:00000000eb3604d9 type:MM_ANONPAGES val:22 [ 30.450212] ================================================================== [ 30.451086] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.451980] Read of size 8 at addr ffff888018d23798 by task sshd/219 [ 30.452698] [ 30.452910] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.453775] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.454704] Call Trace: [ 30.455007] <TASK> [ 30.455457] dump_stack_lvl+0x91/0xf0 [ 30.456192] print_report+0xcc/0x620 [ 30.456899] ? __virt_addr_valid+0x102/0x340 [ 30.457697] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.458586] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.459493] kasan_report+0xbe/0xf0 [ 30.460124] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.460886] vma_interval_tree_remove+0xc75/0xec0 [ 30.461623] vma_prepare+0xc54/0x11a0 [ 30.462208] __split_vma+0x5af/0x950 [ 30.462784] ? __pfx___split_vma+0x10/0x10 [ 30.463427] ? find_held_lock+0x2c/0x110 [ 30.464079] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.464755] ? lock_is_held_type+0x9f/0x120 [ 30.465410] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.466139] ? mtree_range_walk+0x632/0x900 [ 30.466805] ? mas_walk+0x5c7/0x7c0 [ 30.467378] do_vmi_munmap+0x1f1/0x2b0 [ 30.467974] mmap_region+0x1f9/0x2660 [ 30.468557] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.469179] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.470050] ? __pfx_lock_acquire+0x10/0x10 [ 30.470694] ? __pfx_mmap_region+0x10/0x10 [ 30.471331] ? security_mmap_addr+0x7d/0xa0 [ 30.472011] ? get_unmapped_area+0x1f5/0x3f0 [ 30.472678] do_mmap+0x854/0xf00 [ 30.473211] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.473806] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.474482] ksys_mmap_pgoff+0x3af/0x500 [ 30.475099] do_syscall_64+0x3f/0x90 [ 30.475689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.476465] RIP: 0033:0x7f6a5d317d82 [ 30.477023] 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 [ 30.479599] RSP: 002b:00007ffe8c6f3328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.480732] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a5d317d82 [ 30.481752] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a5c751000 [ 30.482783] RBP: 00007f6a5c751000 R08: 0000000000000009 R09: 0000000000001000 [ 30.483820] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556124f49b20 [ 30.484843] R13: 00007ffe8c6f3340 R14: 00007ffe8c6f3370 R15: 00007ffe8c6f36d0 [ 30.485894] </TASK> [ 30.486255] [ 30.486517] Allocated by task 212: [ 30.487027] kasan_save_stack+0x22/0x50 [ 30.487626] kasan_set_track+0x25/0x30 [ 30.488225] __kasan_slab_alloc+0x59/0x70 [ 30.488845] kmem_cache_alloc+0x16b/0x370 [ 30.489467] vm_area_dup+0x20/0x160 [ 30.490020] __split_vma+0x170/0x950 [ 30.490588] split_vma+0xc6/0x110 [ 30.491122] mprotect_fixup+0x8d2/0xb30 [ 30.491740] do_mprotect_pkey+0x87e/0xd40 [ 30.492371] __x64_sys_mprotect+0x78/0xc0 [ 30.493003] do_syscall_64+0x3f/0x90 [ 30.493570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.494356] [ 30.494619] Freed by task 212: [ 30.495098] kasan_save_stack+0x22/0x50 [ 30.495698] kasan_set_track+0x25/0x30 [ 30.496291] kasan_save_free_info+0x2b/0x50 [ 30.496928] __kasan_slab_free+0x10a/0x190 [ 30.497575] kmem_cache_free+0x10d/0x4d0 [ 30.498201] rcu_core+0x8c8/0x2860 [ 30.498741] __do_softirq+0x1b7/0x7d4 [ 30.499302] [ 30.499555] Last potentially related work creation: [ 30.500179] kasan_save_stack+0x22/0x50 [ 30.500680] __kasan_record_aux_stack+0x8e/0xa0 [ 30.501242] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.501871] remove_vma+0x139/0x170 [ 30.502320] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.502862] do_vmi_munmap+0x1f1/0x2b0 [ 30.503340] __vm_munmap+0x138/0x3a0 [ 30.503822] __x64_sys_munmap+0x59/0x80 [ 30.504319] do_syscall_64+0x3f/0x90 [ 30.504777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.505411] [ 30.505625] The buggy address belongs to the object at ffff888018d23740 [ 30.505625] which belongs to the cache vm_area_struct of size 168 [ 30.507070] The buggy address is located 88 bytes inside of [ 30.507070] freed 168-byte region [ffff888018d23740, ffff888018d237e8) [ 30.508477] [ 30.508690] The buggy address belongs to the physical page: [ 30.509339] page:00000000ab9ad759 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d23 [ 30.510406] memcg:ffff888015963d01 [ 30.510824] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.511463] page_type: 0xffffffff() [ 30.511932] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.512848] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015963d01 [ 30.513742] page dumped because: kasan: bad access detected [ 30.514394] [ 30.514611] Memory state around the buggy address: [ 30.515187] ffff888018d23680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.516053] ffff888018d23700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.516892] >ffff888018d23780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.517732] ^ [ 30.518214] ffff888018d23800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.519055] ffff888018d23880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.519915] ================================================================== [ 30.521372] Disabling lock debugging due to kernel taint [ 32.425781] BUG: Bad rss-counter state mm:000000005d4cb420 type:MM_FILEPAGES val:33 [ 32.427034] BUG: Bad rss-counter state mm:000000005d4cb420 type:MM_ANONPAGES val:22 [ 32.836497] BUG: Bad rss-counter state mm:0000000027680cfd type:MM_FILEPAGES val:33 [ 32.837261] BUG: Bad rss-counter state mm:0000000027680cfd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14266' (ECDSA) to the list of known hosts. 2023/06/19 21:40:20 fuzzer started 2023/06/19 21:40:20 dialing manager at localhost:44161 2023/06/19 21:40:20 checking machine... 2023/06/19 21:40:20 checking revisions... [ 33.389624] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:40:20 testing simple program... [ 33.425564] cgroup: Unknown subsys name 'net' [ 33.458708] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:40:13 Registers: info registers vcpu 0 RAX=1ffff11001713885 RBX=ffff88800b89c3f8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800b89c428 RBP=ffff888016c4d398 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888016c4d450 R14=ffffffff813782a8 R15=ffff888016c4d450 RIP=ffffffff81846362 RFL=00000046 [---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 00007fcad6814900 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=00007fcad6dcb618 CR3=000000000f5d0000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fff00716388 CR3=0000000016efc000 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=2030323a30343a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a30343a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000