syzkaller login: [ 28.822811] BUG: Bad rss-counter state mm:00000000e712276a type:MM_FILEPAGES val:33 [ 28.824043] BUG: Bad rss-counter state mm:00000000e712276a type:MM_ANONPAGES val:22 [ 28.866989] ================================================================== [ 28.867953] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.869037] Read of size 8 at addr ffff88800f2f56b0 by task sshd/219 [ 28.869820] [ 28.870038] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.870939] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.871966] Call Trace: [ 28.872295] [ 28.872595] dump_stack_lvl+0x91/0xf0 [ 28.873090] print_report+0xcc/0x620 [ 28.873593] ? __virt_addr_valid+0x102/0x340 [ 28.874148] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.874796] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.875427] kasan_report+0xbe/0xf0 [ 28.875935] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.876584] vma_interval_tree_remove+0xc75/0xec0 [ 28.877193] vma_prepare+0xc54/0x11a0 [ 28.877692] __split_vma+0x5af/0x950 [ 28.878172] ? __pfx___split_vma+0x10/0x10 [ 28.878732] ? find_held_lock+0x2c/0x110 [ 28.879267] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.879883] ? lock_is_held_type+0x9f/0x120 [ 28.880428] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.881059] ? mtree_range_walk+0x632/0x900 [ 28.881630] ? mas_walk+0x5c7/0x7c0 [ 28.882110] do_vmi_munmap+0x1f1/0x2b0 [ 28.882631] mmap_region+0x1f9/0x2660 [ 28.883117] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.883646] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.884387] ? __pfx_lock_acquire+0x10/0x10 [ 28.884943] ? __pfx_mmap_region+0x10/0x10 [ 28.885486] ? security_mmap_addr+0x7d/0xa0 [ 28.886022] ? get_unmapped_area+0x1f5/0x3f0 [ 28.886616] do_mmap+0x854/0xf00 [ 28.887063] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.887578] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.888173] ksys_mmap_pgoff+0x3af/0x500 [ 28.888714] do_syscall_64+0x3f/0x90 [ 28.889201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.889872] RIP: 0033:0x7f9b3f93fd82 [ 28.890342] 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 [ 28.892549] RSP: 002b:00007fffeb803248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.893511] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9b3f93fd82 [ 28.894376] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9b3ed79000 [ 28.895289] RBP: 00007f9b3ed79000 R08: 0000000000000009 R09: 0000000000001000 [ 28.896169] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee3828fec0 [ 28.897029] R13: 00007fffeb803260 R14: 00007fffeb803290 R15: 00007fffeb8035f0 [ 28.897890] [ 28.898184] [ 28.898397] Allocated by task 212: [ 28.898848] kasan_save_stack+0x22/0x50 [ 28.899363] kasan_set_track+0x25/0x30 [ 28.899885] __kasan_slab_alloc+0x59/0x70 [ 28.900413] kmem_cache_alloc+0x16b/0x370 [ 28.900940] vm_area_dup+0x20/0x160 [ 28.901427] __split_vma+0x170/0x950 [ 28.901937] split_vma+0xc6/0x110 [ 28.902434] mprotect_fixup+0x8d2/0xb30 [ 28.902957] do_mprotect_pkey+0x87e/0xd40 [ 28.903493] __x64_sys_mprotect+0x78/0xc0 [ 28.904030] do_syscall_64+0x3f/0x90 [ 28.904522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.905163] [ 28.905376] Freed by task 212: [ 28.905783] kasan_save_stack+0x22/0x50 [ 28.906285] kasan_set_track+0x25/0x30 [ 28.906799] kasan_save_free_info+0x2b/0x50 [ 28.907327] __kasan_slab_free+0x10a/0x190 [ 28.907904] kmem_cache_free+0x10d/0x4d0 [ 28.908415] rcu_core+0x8c8/0x2860 [ 28.908864] __do_softirq+0x1b7/0x7d4 [ 28.909341] [ 28.909572] Last potentially related work creation: [ 28.910163] kasan_save_stack+0x22/0x50 [ 28.910697] __kasan_record_aux_stack+0x8e/0xa0 [ 28.911273] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.911940] remove_vma+0x139/0x170 [ 28.912393] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.912963] do_vmi_munmap+0x1f1/0x2b0 [ 28.913450] __vm_munmap+0x138/0x3a0 [ 28.913929] __x64_sys_munmap+0x59/0x80 [ 28.914425] do_syscall_64+0x3f/0x90 [ 28.914916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.915572] [ 28.915809] The buggy address belongs to the object at ffff88800f2f5658 [ 28.915809] which belongs to the cache vm_area_struct of size 168 [ 28.917293] The buggy address is located 88 bytes inside of [ 28.917293] freed 168-byte region [ffff88800f2f5658, ffff88800f2f5700) [ 28.918725] [ 28.918942] The buggy address belongs to the physical page: [ 28.919619] page:00000000daa3d429 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2f5 [ 28.920731] memcg:ffff88800d1fb501 [ 28.921164] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.921816] page_type: 0xffffffff() [ 28.922274] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.923224] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1fb501 [ 28.924155] page dumped because: kasan: bad access detected [ 28.924825] [ 28.925039] Memory state around the buggy address: [ 28.925628] ffff88800f2f5580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.926490] ffff88800f2f5600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.927362] >ffff88800f2f5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.928297] ^ [ 28.928892] ffff88800f2f5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.929768] ffff88800f2f5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.930648] ================================================================== [ 28.931742] Disabling lock debugging due to kernel taint [ 31.659105] BUG: Bad rss-counter state mm:000000007206a2af type:MM_FILEPAGES val:33 [ 31.660101] BUG: Bad rss-counter state mm:000000007206a2af type:MM_ANONPAGES val:22 [ 32.238199] BUG: Bad rss-counter state mm:0000000054f670d8 type:MM_FILEPAGES val:33 [ 32.239362] BUG: Bad rss-counter state mm:0000000054f670d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5960' (ECDSA) to the list of known hosts. 2023/06/21 04:59:18 fuzzer started 2023/06/21 04:59:18 dialing manager at localhost:36067 2023/06/21 04:59:19 checking machine... 2023/06/21 04:59:19 checking revisions... [ 32.928566] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:59:19 testing simple program... [ 32.981910] cgroup: Unknown subsys name 'net' [ 33.017108] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:59:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff810bd032 RDX=0000000000000bd0 RSI=0000000000000bd0 RDI=ffffffff864ec930 RBP=ffff888016b5f858 RSP=ffff888016b5f740 R8 =0000000000000000 R9 =ffff888016b5f840 R10=0000000000038001 R11=0000000000006097 R12=ffff888016b5f860 R13=ffff888016b5f848 R14=ffff888016b5f841 R15=ffff888016b5f800 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007fb82fa01900 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=00007ffed5e75000 CR3=000000000d5fa000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007f505bbd21b0 CR3=0000000009656000 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=576d8db756159ca6d143b0df95040c57 XMM02=ec2efd57dc4c00df000000000011b398 XMM03=76449444b9372d2e000000000011b468 XMM04=d64f08ed99ba173200000000000ae988 XMM05=19e9129bd510f2350000000000131f40 XMM06=4fda316b135da52b0000000000131dc8 XMM07=e042d86d42eb936e0000000000122328 XMM08=76449444b9372d2e000000000011b468 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000