syzkaller login: [ 35.308413] BUG: Bad rss-counter state mm:000000002826c7cd type:MM_FILEPAGES val:33 [ 35.310598] BUG: Bad rss-counter state mm:000000002826c7cd type:MM_ANONPAGES val:22 [ 35.483463] ================================================================== [ 35.484483] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.485528] Read of size 8 at addr ffff88800e763b38 by task sshd/220 [ 35.486487] [ 35.486743] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.487708] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.488793] Call Trace: [ 35.489148] [ 35.489459] dump_stack_lvl+0x91/0xf0 [ 35.489990] print_report+0xcc/0x620 [ 35.490519] ? __virt_addr_valid+0x102/0x340 [ 35.491112] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.491795] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.492464] kasan_report+0xbe/0xf0 [ 35.492976] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.493647] vma_interval_tree_remove+0xc75/0xec0 [ 35.494293] vma_prepare+0xc54/0x11a0 [ 35.494814] __split_vma+0x5af/0x950 [ 35.495329] ? __pfx___split_vma+0x10/0x10 [ 35.495905] ? find_held_lock+0x2c/0x110 [ 35.496475] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.497077] ? lock_is_held_type+0x9f/0x120 [ 35.497677] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.498351] ? mtree_range_walk+0x632/0x900 [ 35.498964] ? mas_walk+0x5c7/0x7c0 [ 35.499494] do_vmi_munmap+0x1f1/0x2b0 [ 35.500057] mmap_region+0x1f9/0x2660 [ 35.500595] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.501170] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.501965] ? __pfx_lock_acquire+0x10/0x10 [ 35.502562] ? __pfx_mmap_region+0x10/0x10 [ 35.503155] ? security_mmap_addr+0x7d/0xa0 [ 35.503753] ? get_unmapped_area+0x1f5/0x3f0 [ 35.504359] do_mmap+0x854/0xf00 [ 35.504845] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.505401] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.506024] ksys_mmap_pgoff+0x3af/0x500 [ 35.506584] do_syscall_64+0x3f/0x90 [ 35.507123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.507868] RIP: 0033:0x7f6542dc0d82 [ 35.508373] 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 [ 35.510731] RSP: 002b:00007fffcad39488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.511737] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6542dc0d82 [ 35.512671] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65421fa000 [ 35.513618] RBP: 00007f65421fa000 R08: 0000000000000009 R09: 0000000000001000 [ 35.514563] R10: 0000000000000812 R11: 0000000000000206 R12: 000056349879eec0 [ 35.515485] R13: 00007fffcad394a0 R14: 00007fffcad394d0 R15: 00007fffcad39830 [ 35.516439] [ 35.516757] [ 35.516994] Allocated by task 213: [ 35.517465] kasan_save_stack+0x22/0x50 [ 35.518022] kasan_set_track+0x25/0x30 [ 35.518562] __kasan_slab_alloc+0x59/0x70 [ 35.519133] kmem_cache_alloc+0x16b/0x370 [ 35.519723] vm_area_dup+0x20/0x160 [ 35.520216] __split_vma+0x170/0x950 [ 35.520731] split_vma+0xc6/0x110 [ 35.521214] mprotect_fixup+0x8d2/0xb30 [ 35.521772] do_mprotect_pkey+0x87e/0xd40 [ 35.522347] __x64_sys_mprotect+0x78/0xc0 [ 35.522920] do_syscall_64+0x3f/0x90 [ 35.523441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.524159] [ 35.524398] Freed by task 213: [ 35.524827] kasan_save_stack+0x22/0x50 [ 35.525376] kasan_set_track+0x25/0x30 [ 35.525917] kasan_save_free_info+0x2b/0x50 [ 35.526503] __kasan_slab_free+0x10a/0x190 [ 35.527094] kmem_cache_free+0x10d/0x4d0 [ 35.527743] rcu_core+0x8c8/0x2860 [ 35.528231] __do_softirq+0x1b7/0x7d4 [ 35.528752] [ 35.528985] Last potentially related work creation: [ 35.529621] kasan_save_stack+0x22/0x50 [ 35.530171] __kasan_record_aux_stack+0x8e/0xa0 [ 35.530802] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.531509] remove_vma+0x139/0x170 [ 35.532005] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.532630] do_vmi_munmap+0x1f1/0x2b0 [ 35.533157] __vm_munmap+0x138/0x3a0 [ 35.533660] __x64_sys_munmap+0x59/0x80 [ 35.534200] do_syscall_64+0x3f/0x90 [ 35.534719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.535415] [ 35.535656] The buggy address belongs to the object at ffff88800e763ae0 [ 35.535656] which belongs to the cache vm_area_struct of size 168 [ 35.537198] The buggy address is located 88 bytes inside of [ 35.537198] freed 168-byte region [ffff88800e763ae0, ffff88800e763b88) [ 35.538686] [ 35.538913] The buggy address belongs to the physical page: [ 35.539655] page:00000000227bfc88 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe763 [ 35.540790] memcg:ffff88800e771701 [ 35.541233] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.541976] page_type: 0xffffffff() [ 35.542448] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 35.543438] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e771701 [ 35.544420] page dumped because: kasan: bad access detected [ 35.545134] [ 35.545361] Memory state around the buggy address: [ 35.545987] ffff88800e763a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.546896] ffff88800e763a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 35.547814] >ffff88800e763b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.548716] ^ [ 35.549373] ffff88800e763b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 35.550271] ffff88800e763c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 35.551163] ================================================================== [ 35.552212] Disabling lock debugging due to kernel taint [ 37.824928] BUG: Bad rss-counter state mm:000000000699202b type:MM_FILEPAGES val:33 [ 37.826100] BUG: Bad rss-counter state mm:000000000699202b type:MM_ANONPAGES val:22 [ 38.200330] BUG: Bad rss-counter state mm:00000000b1e1a87f type:MM_FILEPAGES val:33 [ 38.201324] BUG: Bad rss-counter state mm:00000000b1e1a87f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62882' (ECDSA) to the list of known hosts. 2023/06/21 07:35:06 fuzzer started 2023/06/21 07:35:07 dialing manager at localhost:36067 2023/06/21 07:35:07 checking machine... 2023/06/21 07:35:07 checking revisions... [ 38.941664] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:35:07 testing simple program... [ 38.990418] cgroup: Unknown subsys name 'net' [ 39.042208] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:35:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880194af8e0 RCX=ffffffff844f7dcf RDX=ffff88800f5251c0 RSI=0000000000000003 RDI=0000000000000002 RBP=0000000000000003 RSP=ffff8880194af840 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000003 R11=00000000000b6a61 R12=0000000000000003 R13=ffff8880194af8f8 R14=ffff8880194af8e0 R15=0000000000000000 RIP=ffffffff814c0438 RFL=00000293 [--S-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 00007fa581556700 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=00007fe2be12e618 CR3=000000000c628000 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=2036303a35333a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a35333a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f615dc34a10 CR3=000000000d7a0000 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=d2429d28ec1638b6a141196463e78a0f XMM02=000000000011b6a8ec2efd57dc4c00df XMM03=00000000001220485e59ae199344d55e XMM04=157845664a269e8200000000000ae988 XMM05=19e9129bd510f2350000000000131bc0 XMM06=d4a87a4e1259da360000000000130d98 XMM07=e042d86d42eb936e0000000000122320 XMM08=5e59ae199344d55e000000000011b708 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000