syzkaller login: [ 31.218983] BUG: Bad rss-counter state mm:00000000406d356e type:MM_FILEPAGES val:33 [ 31.220158] BUG: Bad rss-counter state mm:00000000406d356e type:MM_ANONPAGES val:22 [ 31.388705] ================================================================== [ 31.389718] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.390645] Read of size 8 at addr ffff88800fda1228 by task sshd/219 [ 31.391487] [ 31.391708] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.392567] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.393570] Call Trace: [ 31.393887] [ 31.394170] dump_stack_lvl+0x91/0xf0 [ 31.394658] print_report+0xcc/0x620 [ 31.395138] ? __virt_addr_valid+0x102/0x340 [ 31.395685] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.396298] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.396914] kasan_report+0xbe/0xf0 [ 31.397414] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.398034] vma_interval_tree_remove+0xc75/0xec0 [ 31.398632] vma_prepare+0xc54/0x11a0 [ 31.399101] __split_vma+0x5af/0x950 [ 31.399569] ? __pfx___split_vma+0x10/0x10 [ 31.400091] ? find_held_lock+0x2c/0x110 [ 31.400612] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.401183] ? lock_is_held_type+0x9f/0x120 [ 31.401720] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.402317] ? mtree_range_walk+0x632/0x900 [ 31.402866] ? mas_walk+0x5c7/0x7c0 [ 31.403340] do_vmi_munmap+0x1f1/0x2b0 [ 31.403829] mmap_region+0x1f9/0x2660 [ 31.404314] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.404822] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.405533] ? __pfx_lock_acquire+0x10/0x10 [ 31.406065] ? __pfx_mmap_region+0x10/0x10 [ 31.406592] ? security_mmap_addr+0x7d/0xa0 [ 31.407116] ? get_unmapped_area+0x1f5/0x3f0 [ 31.407673] do_mmap+0x854/0xf00 [ 31.408107] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.408603] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.409179] ksys_mmap_pgoff+0x3af/0x500 [ 31.409687] do_syscall_64+0x3f/0x90 [ 31.410172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.410818] RIP: 0033:0x7f4ccd039d82 [ 31.411273] 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 [ 31.413398] RSP: 002b:00007ffe557502a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.414297] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4ccd039d82 [ 31.415142] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4ccc473000 [ 31.415993] RBP: 00007f4ccc473000 R08: 0000000000000009 R09: 0000000000001000 [ 31.416826] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641894b6ec0 [ 31.417670] R13: 00007ffe557502c0 R14: 00007ffe557502f0 R15: 00007ffe55750650 [ 31.418523] [ 31.418813] [ 31.419026] Allocated by task 212: [ 31.419450] kasan_save_stack+0x22/0x50 [ 31.419946] kasan_set_track+0x25/0x30 [ 31.420435] __kasan_slab_alloc+0x59/0x70 [ 31.420952] kmem_cache_alloc+0x16b/0x370 [ 31.421481] vm_area_dup+0x20/0x160 [ 31.421932] __split_vma+0x170/0x950 [ 31.422393] split_vma+0xc6/0x110 [ 31.422838] mprotect_fixup+0x8d2/0xb30 [ 31.423345] do_mprotect_pkey+0x87e/0xd40 [ 31.423859] __x64_sys_mprotect+0x78/0xc0 [ 31.424380] do_syscall_64+0x3f/0x90 [ 31.424848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.425491] [ 31.425707] Freed by task 212: [ 31.426099] kasan_save_stack+0x22/0x50 [ 31.426603] kasan_set_track+0x25/0x30 [ 31.427093] kasan_save_free_info+0x2b/0x50 [ 31.427624] __kasan_slab_free+0x10a/0x190 [ 31.428153] kmem_cache_free+0x10d/0x4d0 [ 31.428654] rcu_core+0x8c8/0x2860 [ 31.429142] __do_softirq+0x1b7/0x7d4 [ 31.429615] [ 31.429829] Last potentially related work creation: [ 31.430405] kasan_save_stack+0x22/0x50 [ 31.430908] __kasan_record_aux_stack+0x8e/0xa0 [ 31.431473] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.432111] remove_vma+0x139/0x170 [ 31.432556] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.433128] do_vmi_munmap+0x1f1/0x2b0 [ 31.433615] __vm_munmap+0x138/0x3a0 [ 31.434078] __x64_sys_munmap+0x59/0x80 [ 31.434578] do_syscall_64+0x3f/0x90 [ 31.435051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.435694] [ 31.435908] The buggy address belongs to the object at ffff88800fda11d0 [ 31.435908] which belongs to the cache vm_area_struct of size 168 [ 31.437373] The buggy address is located 88 bytes inside of [ 31.437373] freed 168-byte region [ffff88800fda11d0, ffff88800fda1278) [ 31.438776] [ 31.438996] The buggy address belongs to the physical page: [ 31.439651] page:0000000003e06105 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfda1 [ 31.440722] memcg:ffff888018716401 [ 31.441167] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.441803] page_type: 0xffffffff() [ 31.442250] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.443166] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018716401 [ 31.444072] page dumped because: kasan: bad access detected [ 31.444727] [ 31.444941] Memory state around the buggy address: [ 31.445532] ffff88800fda1100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.446378] ffff88800fda1180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.447223] >ffff88800fda1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.448078] ^ [ 31.448628] ffff88800fda1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.449481] ffff88800fda1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.450336] ================================================================== [ 31.451545] Disabling lock debugging due to kernel taint [ 33.724160] BUG: Bad rss-counter state mm:00000000ced1d480 type:MM_FILEPAGES val:33 [ 33.725226] BUG: Bad rss-counter state mm:00000000ced1d480 type:MM_ANONPAGES val:22 [ 34.229633] BUG: Bad rss-counter state mm:0000000011667a00 type:MM_FILEPAGES val:33 [ 34.230801] BUG: Bad rss-counter state mm:0000000011667a00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2490' (ECDSA) to the list of known hosts. 2023/06/21 02:09:00 fuzzer started 2023/06/21 02:09:00 dialing manager at localhost:36067 2023/06/21 02:09:00 checking machine... 2023/06/21 02:09:00 checking revisions... [ 34.968269] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:09:00 testing simple program... [ 35.016196] cgroup: Unknown subsys name 'net' [ 35.053818] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:09:00 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=000055b2f7939000 RCX=ffffffff8175cf40 RDX=ffff888018581b40 RSI=0000000000000000 RDI=0000000000000007 RBP=000000001a442007 RSP=ffff8880184e7cf8 R8 =0000000000000007 R9 =0000000000000000 R10=000000001a442007 R11=0000000000000000 R12=000000001a442067 R13=ffff888019d86de0 R14=ffff8880184e7df0 R15=0000000019d86067 RIP=ffffffff814c086b RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7aefa1f900 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=000055b2f7939644 CR3=000000001686c000 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=0000000000000000000055b2f6b77060 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=0000000000000007 RBX=0000000000000003 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c857a RDI=ffff8880147583f4 RBP=ffff888014758000 RSP=ffff888014757400 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888014758000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88801cb20e40 RIP=ffffffff8137450d 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 00007fafa9dda900 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=00007fafa92f8030 CR3=0000000008ece000 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=b6aa2a6c163913b9b14e49390f916623 XMM02=eff9b2d0a8fce9cb000000000011af20 XMM03=2c67c8bc2e329bc3000000000011b048 XMM04=5a55ef8bc230a66000000000000ae988 XMM05=0fa990cfbed8332d0000000000132ce8 XMM06=dfcdbad4f1609c370000000000131b80 XMM07=fb795ef6d65770560000000000121d50 XMM08=2c67c8bc2e329bc3000000000011b048 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000