syzkaller login: [ 31.425862] BUG: Bad rss-counter state mm:00000000e2a66a6c type:MM_FILEPAGES val:33 [ 31.427114] BUG: Bad rss-counter state mm:00000000e2a66a6c type:MM_ANONPAGES val:22 [ 31.578230] ================================================================== [ 31.579322] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.580434] Read of size 8 at addr ffff88800d4b55c8 by task sshd/218 [ 31.581528] [ 31.581763] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.582619] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.583615] Call Trace: [ 31.583934] [ 31.584219] dump_stack_lvl+0x91/0xf0 [ 31.584715] print_report+0xcc/0x620 [ 31.585210] ? __virt_addr_valid+0x102/0x340 [ 31.585765] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.586386] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.586999] kasan_report+0xbe/0xf0 [ 31.587488] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.588111] vma_interval_tree_remove+0xc75/0xec0 [ 31.588705] vma_prepare+0xc54/0x11a0 [ 31.589178] __split_vma+0x5af/0x950 [ 31.589659] ? __pfx___split_vma+0x10/0x10 [ 31.590183] ? find_held_lock+0x2c/0x110 [ 31.590702] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.591268] ? lock_is_held_type+0x9f/0x120 [ 31.591804] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.592406] ? mtree_range_walk+0x632/0x900 [ 31.592954] ? mas_walk+0x5c7/0x7c0 [ 31.593448] do_vmi_munmap+0x1f1/0x2b0 [ 31.593945] mmap_region+0x1f9/0x2660 [ 31.594426] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.594936] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.595642] ? __pfx_lock_acquire+0x10/0x10 [ 31.596176] ? __pfx_mmap_region+0x10/0x10 [ 31.596704] ? security_mmap_addr+0x7d/0xa0 [ 31.597226] ? get_unmapped_area+0x1f5/0x3f0 [ 31.597777] do_mmap+0x854/0xf00 [ 31.598211] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.598704] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.599264] ksys_mmap_pgoff+0x3af/0x500 [ 31.599765] do_syscall_64+0x3f/0x90 [ 31.600240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.600889] RIP: 0033:0x7f3d9fbf2d82 [ 31.601348] 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 [ 31.603449] RSP: 002b:00007ffc63dccd18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.604347] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3d9fbf2d82 [ 31.605187] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3d9f02c000 [ 31.606047] RBP: 00007f3d9f02c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.606881] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b0e783eb20 [ 31.607721] R13: 00007ffc63dccd30 R14: 00007ffc63dccd60 R15: 00007ffc63dcd0c0 [ 31.608568] [ 31.608867] [ 31.609082] Allocated by task 211: [ 31.609511] kasan_save_stack+0x22/0x50 [ 31.610020] kasan_set_track+0x25/0x30 [ 31.610509] __kasan_slab_alloc+0x59/0x70 [ 31.611032] kmem_cache_alloc+0x16b/0x370 [ 31.611544] vm_area_dup+0x20/0x160 [ 31.612003] __split_vma+0x170/0x950 [ 31.612469] split_vma+0xc6/0x110 [ 31.612906] mprotect_fixup+0x8d2/0xb30 [ 31.613420] do_mprotect_pkey+0x87e/0xd40 [ 31.613936] __x64_sys_mprotect+0x78/0xc0 [ 31.614451] do_syscall_64+0x3f/0x90 [ 31.614928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.615560] [ 31.615778] Freed by task 202: [ 31.616167] kasan_save_stack+0x22/0x50 [ 31.616665] kasan_set_track+0x25/0x30 [ 31.617154] kasan_save_free_info+0x2b/0x50 [ 31.617695] __kasan_slab_free+0x10a/0x190 [ 31.618220] kmem_cache_free+0x10d/0x4d0 [ 31.618726] rcu_core+0x8c8/0x2860 [ 31.619165] __do_softirq+0x1b7/0x7d4 [ 31.619638] [ 31.619854] Last potentially related work creation: [ 31.620432] kasan_save_stack+0x22/0x50 [ 31.620943] __kasan_record_aux_stack+0x8e/0xa0 [ 31.621526] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.622227] remove_vma+0x139/0x170 [ 31.622687] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.623239] do_vmi_munmap+0x1f1/0x2b0 [ 31.623721] __vm_munmap+0x138/0x3a0 [ 31.624182] __x64_sys_munmap+0x59/0x80 [ 31.624676] do_syscall_64+0x3f/0x90 [ 31.625145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.625814] [ 31.626063] Second to last potentially related work creation: [ 31.626742] kasan_save_stack+0x22/0x50 [ 31.627244] __kasan_record_aux_stack+0x8e/0xa0 [ 31.627813] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.628450] remove_vma+0x139/0x170 [ 31.628900] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.629461] do_vmi_munmap+0x1f1/0x2b0 [ 31.629948] mmap_region+0x1f9/0x2660 [ 31.630426] do_mmap+0x854/0xf00 [ 31.630864] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.631354] ksys_mmap_pgoff+0x3af/0x500 [ 31.631859] do_syscall_64+0x3f/0x90 [ 31.632330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.632963] [ 31.633184] The buggy address belongs to the object at ffff88800d4b5570 [ 31.633184] which belongs to the cache vm_area_struct of size 168 [ 31.634669] The buggy address is located 88 bytes inside of [ 31.634669] freed 168-byte region [ffff88800d4b5570, ffff88800d4b5618) [ 31.636075] [ 31.636289] The buggy address belongs to the physical page: [ 31.636962] page:000000009f1e895e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4b5 [ 31.638046] memcg:ffff88800e7cc301 [ 31.638468] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.639113] page_type: 0xffffffff() [ 31.639566] raw: 0100000000000200 ffff88800879fc80 ffffea0000382f40 dead000000000002 [ 31.640481] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7cc301 [ 31.641409] page dumped because: kasan: bad access detected [ 31.642068] [ 31.642282] Memory state around the buggy address: [ 31.642870] ffff88800d4b5480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.643728] ffff88800d4b5500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.644588] >ffff88800d4b5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.645443] ^ [ 31.646105] ffff88800d4b5600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.646968] ffff88800d4b5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.647823] ================================================================== [ 31.648736] Disabling lock debugging due to kernel taint [ 33.840746] BUG: Bad rss-counter state mm:000000001c3263c3 type:MM_FILEPAGES val:33 [ 33.841769] BUG: Bad rss-counter state mm:000000001c3263c3 type:MM_ANONPAGES val:22 [ 34.402893] BUG: Bad rss-counter state mm:00000000c2af1c57 type:MM_FILEPAGES val:33 [ 34.404042] BUG: Bad rss-counter state mm:00000000c2af1c57 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40777' (ECDSA) to the list of known hosts. 2023/06/19 15:57:31 fuzzer started 2023/06/19 15:57:32 dialing manager at localhost:44161 2023/06/19 15:57:32 checking machine... 2023/06/19 15:57:32 checking revisions... [ 35.068291] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:57:32 testing simple program... [ 35.113345] cgroup: Unknown subsys name 'net' [ 35.172575] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:57:24 Registers: info registers vcpu 0 RAX=000000000000639d RBX=ffffffff85d3d010 RCX=1ffffffff0ba77f5 RDX=00000000fffbf0cf RSI=00000000fffbf0ce RDI=ffff8880159583f4 RBP=ffff88806ce3a2d8 RSP=ffff88806ce09c58 R8 =00000000fffd8af6 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=000000127514b3c4 R12=ffffffff85d3bf9c R13=ffff88806ce3a2c0 R14=1ffff1100d9c139c R15=0000000000000000 RIP=ffffffff8137cc28 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 00007fb3c3131700 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=00007f3f59060650 CR3=000000000e0e6000 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=2031333a37353a3531203931206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a37353a3531203931 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007f53e976bfa0 CR3=000000000c612000 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=34134b5f6a76649625450d5927ec773c XMM02=2c67c8bc2e329bc3000000000011dbb8 XMM03=fb795ef6d65770560000000000123e68 XMM04=9d3b30b5c3f572c500000000000ae988 XMM05=751b9502027dc0b90000000000134d58 XMM06=3823ded2422bc9880000000000133f30 XMM07=e042d86d42eb936e0000000000124140 XMM08=20eb0119fb18b17b000000000011dc18 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000