syzkaller login: [ 30.498592] BUG: Bad rss-counter state mm:00000000859dadaa type:MM_FILEPAGES val:33 [ 30.499296] BUG: Bad rss-counter state mm:00000000859dadaa type:MM_ANONPAGES val:22 [ 30.656750] ================================================================== [ 30.657445] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.666718] Read of size 8 at addr ffff88801984e4e0 by task sshd/220 [ 30.670894] [ 30.671066] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.671637] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.672284] Call Trace: [ 30.672506] [ 30.672701] dump_stack_lvl+0x91/0xf0 [ 30.673029] print_report+0xcc/0x620 [ 30.673343] ? __virt_addr_valid+0x102/0x340 [ 30.673702] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.674117] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.674550] kasan_report+0xbe/0xf0 [ 30.674828] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.675182] vma_interval_tree_remove+0xc75/0xec0 [ 30.675532] vma_prepare+0xc54/0x11a0 [ 30.675810] __split_vma+0x5af/0x950 [ 30.676085] ? __pfx___split_vma+0x10/0x10 [ 30.676396] ? find_held_lock+0x2c/0x110 [ 30.676699] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.677021] ? lock_is_held_type+0x9f/0x120 [ 30.677331] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.677676] ? mtree_range_walk+0x632/0x900 [ 30.677994] ? mas_walk+0x5c7/0x7c0 [ 30.678268] do_vmi_munmap+0x1f1/0x2b0 [ 30.682627] mmap_region+0x1f9/0x2660 [ 30.682909] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.683205] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.683609] ? __pfx_lock_acquire+0x10/0x10 [ 30.683916] ? __pfx_mmap_region+0x10/0x10 [ 30.684219] ? security_mmap_addr+0x7d/0xa0 [ 30.684527] ? get_unmapped_area+0x1f5/0x3f0 [ 30.684840] do_mmap+0x854/0xf00 [ 30.685085] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.685370] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.685691] ksys_mmap_pgoff+0x3af/0x500 [ 30.685984] do_syscall_64+0x3f/0x90 [ 30.686263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.690684] RIP: 0033:0x7fd7d85e8d82 [ 30.690946] 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 [ 30.692165] RSP: 002b:00007fff60df91e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.692682] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd7d85e8d82 [ 30.693167] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd7d7a22000 [ 30.693643] RBP: 00007fd7d7a22000 R08: 0000000000000009 R09: 0000000000001000 [ 30.694127] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555fdf549ec0 [ 30.694637] R13: 00007fff60df9200 R14: 00007fff60df9230 R15: 00007fff60df9590 [ 30.695127] [ 30.695291] [ 30.695420] Allocated by task 213: [ 30.695659] kasan_save_stack+0x22/0x50 [ 30.695950] kasan_set_track+0x25/0x30 [ 30.696232] __kasan_slab_alloc+0x59/0x70 [ 30.696531] kmem_cache_alloc+0x16b/0x370 [ 30.696826] vm_area_dup+0x20/0x160 [ 30.697090] __split_vma+0x170/0x950 [ 30.697358] split_vma+0xc6/0x110 [ 30.697602] mprotect_fixup+0x8d2/0xb30 [ 30.697892] do_mprotect_pkey+0x87e/0xd40 [ 30.698191] __x64_sys_mprotect+0x78/0xc0 [ 30.702610] do_syscall_64+0x3f/0x90 [ 30.702889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.703254] [ 30.703377] Freed by task 213: [ 30.703602] kasan_save_stack+0x22/0x50 [ 30.703891] kasan_set_track+0x25/0x30 [ 30.704174] kasan_save_free_info+0x2b/0x50 [ 30.704478] __kasan_slab_free+0x10a/0x190 [ 30.704783] kmem_cache_free+0x10d/0x4d0 [ 30.705074] rcu_core+0x8c8/0x2860 [ 30.705332] __do_softirq+0x1b7/0x7d4 [ 30.705610] [ 30.705731] Last potentially related work creation: [ 30.706063] kasan_save_stack+0x22/0x50 [ 30.706375] __kasan_record_aux_stack+0x8e/0xa0 [ 30.706702] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.707067] remove_vma+0x139/0x170 [ 30.707327] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.707649] do_vmi_munmap+0x1f1/0x2b0 [ 30.707928] __vm_munmap+0x138/0x3a0 [ 30.708196] __x64_sys_munmap+0x59/0x80 [ 30.708480] do_syscall_64+0x3f/0x90 [ 30.708747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.709122] [ 30.709241] The buggy address belongs to the object at ffff88801984e488 [ 30.709241] which belongs to the cache vm_area_struct of size 168 [ 30.710080] The buggy address is located 88 bytes inside of [ 30.710080] freed 168-byte region [ffff88801984e488, ffff88801984e530) [ 30.722940] [ 30.723076] The buggy address belongs to the physical page: [ 30.723449] page:00000000fc49f79b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1984e [ 30.724072] memcg:ffff8880158f8501 [ 30.724317] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.724687] page_type: 0xffffffff() [ 30.724945] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.725470] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880158f8501 [ 30.725979] page dumped because: kasan: bad access detected [ 30.726397] [ 30.726516] Memory state around the buggy address: [ 30.726854] ffff88801984e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.727346] ffff88801984e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.727837] >ffff88801984e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.728326] ^ [ 30.728751] ffff88801984e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.729239] ffff88801984e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.729727] ================================================================== [ 30.730339] Disabling lock debugging due to kernel taint [ 33.362401] BUG: Bad rss-counter state mm:00000000f9000701 type:MM_FILEPAGES val:33 [ 33.363038] BUG: Bad rss-counter state mm:00000000f9000701 type:MM_ANONPAGES val:22 [ 34.907883] BUG: Bad rss-counter state mm:00000000bf5b96ad type:MM_FILEPAGES val:33 [ 34.908988] BUG: Bad rss-counter state mm:00000000bf5b96ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19042' (ECDSA) to the list of known hosts. 2023/06/21 10:25:39 fuzzer started 2023/06/21 10:25:40 dialing manager at localhost:36067 2023/06/21 10:25:40 checking machine... 2023/06/21 10:25:40 checking revisions... [ 36.198396] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:25:40 testing simple program... [ 36.242344] cgroup: Unknown subsys name 'net' [ 36.301640] cgroup: Unknown subsys name 'rlimit' executing program executing program VM DIAGNOSIS: 10:25:39 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 0000000000000000 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=00007fa5a0b7dd70 CR3=000000000a10c000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=f0437d0cbd12f1700000000000133ce0 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=aaebe444ffdb2c9400000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8611d3ee RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800e3974e8 RSP=ffff88800e397420 R8 =ffffffff8611d3f2 R9 =ffff88800e3974d0 R10=0000000000038001 R11=000000000001c3d0 R12=ffff88800e3974f0 R13=ffff88800e3974d8 R14=ffff88800e397e08 R15=ffff88800e397490 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 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=00007f1f42777260 CR3=000000000f0bc000 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=756e696c2d34365f3638782f62696c2f XMM01=7075733562726b62696c2f756e672d78 XMM02=00302e6f732e74726f70707573356272 XMM03=6b62696c2f756e672d78756e696c2d34 XMM04=00000000000000000000000000000000 XMM05=00007f1f42ca4f6000007f1f42a87f30 XMM06=00007f1f42a87a2000007f1f42a87510 XMM07=00007f1f42a8700000007f1f42ca5a20 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000