syzkaller login: [ 31.515803] BUG: Bad rss-counter state mm:00000000cb9e3e96 type:MM_FILEPAGES val:33 [ 31.517382] BUG: Bad rss-counter state mm:00000000cb9e3e96 type:MM_ANONPAGES val:22 [ 31.671943] ================================================================== [ 31.673031] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.674267] Read of size 8 at addr ffff88800ebb1140 by task sshd/221 [ 31.675207] [ 31.675472] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.676533] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.677702] Call Trace: [ 31.678083] [ 31.678430] dump_stack_lvl+0x91/0xf0 [ 31.679050] print_report+0xcc/0x620 [ 31.679633] ? __virt_addr_valid+0x102/0x340 [ 31.680277] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.680910] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.681541] kasan_report+0xbe/0xf0 [ 31.682023] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.682651] vma_interval_tree_remove+0xc75/0xec0 [ 31.683275] vma_prepare+0xc54/0x11a0 [ 31.683761] __split_vma+0x5af/0x950 [ 31.684236] ? __pfx___split_vma+0x10/0x10 [ 31.684768] ? find_held_lock+0x2c/0x110 [ 31.685290] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.685864] ? lock_is_held_type+0x9f/0x120 [ 31.686406] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.687034] ? mtree_range_walk+0x632/0x900 [ 31.687594] ? mas_walk+0x5c7/0x7c0 [ 31.688085] do_vmi_munmap+0x1f1/0x2b0 [ 31.688580] mmap_region+0x1f9/0x2660 [ 31.689078] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.689602] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.690327] ? __pfx_lock_acquire+0x10/0x10 [ 31.690874] ? __pfx_mmap_region+0x10/0x10 [ 31.691428] ? security_mmap_addr+0x7d/0xa0 [ 31.691972] ? get_unmapped_area+0x1f5/0x3f0 [ 31.692519] do_mmap+0x854/0xf00 [ 31.692970] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.693472] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.694041] ksys_mmap_pgoff+0x3af/0x500 [ 31.694553] do_syscall_64+0x3f/0x90 [ 31.695044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.695700] RIP: 0033:0x7f12aab58d82 [ 31.696165] 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 [ 31.698279] RSP: 002b:00007ffdabf9cea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.699189] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f12aab58d82 [ 31.700031] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f12a9f92000 [ 31.700868] RBP: 00007f12a9f92000 R08: 0000000000000009 R09: 0000000000001000 [ 31.701715] R10: 0000000000000812 R11: 0000000000000206 R12: 00005615f2b93ec0 [ 31.702556] R13: 00007ffdabf9cec0 R14: 00007ffdabf9cef0 R15: 00007ffdabf9d250 [ 31.703434] [ 31.703728] [ 31.703944] Allocated by task 213: [ 31.704370] kasan_save_stack+0x22/0x50 [ 31.704871] kasan_set_track+0x25/0x30 [ 31.705370] __kasan_slab_alloc+0x59/0x70 [ 31.705902] kmem_cache_alloc+0x16b/0x370 [ 31.706426] vm_area_dup+0x20/0x160 [ 31.706881] __split_vma+0x170/0x950 [ 31.707361] split_vma+0xc6/0x110 [ 31.707802] mprotect_fixup+0x8d2/0xb30 [ 31.708308] do_mprotect_pkey+0x87e/0xd40 [ 31.708834] __x64_sys_mprotect+0x78/0xc0 [ 31.709356] do_syscall_64+0x3f/0x90 [ 31.709826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.710467] [ 31.710681] Freed by task 213: [ 31.711090] kasan_save_stack+0x22/0x50 [ 31.711591] kasan_set_track+0x25/0x30 [ 31.712087] kasan_save_free_info+0x2b/0x50 [ 31.712614] __kasan_slab_free+0x10a/0x190 [ 31.713145] kmem_cache_free+0x10d/0x4d0 [ 31.713646] rcu_core+0x8c8/0x2860 [ 31.714096] __do_softirq+0x1b7/0x7d4 [ 31.714571] [ 31.714787] Last potentially related work creation: [ 31.715471] kasan_save_stack+0x22/0x50 [ 31.715974] __kasan_record_aux_stack+0x8e/0xa0 [ 31.716543] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.717193] remove_vma+0x139/0x170 [ 31.717645] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.718204] do_vmi_munmap+0x1f1/0x2b0 [ 31.718690] __vm_munmap+0x138/0x3a0 [ 31.719163] __x64_sys_munmap+0x59/0x80 [ 31.719655] do_syscall_64+0x3f/0x90 [ 31.720126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.720764] [ 31.720978] Second to last potentially related work creation: [ 31.721664] kasan_save_stack+0x22/0x50 [ 31.722166] __kasan_record_aux_stack+0x8e/0xa0 [ 31.722742] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.723544] remove_vma+0x139/0x170 [ 31.724082] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.724736] do_vmi_munmap+0x1f1/0x2b0 [ 31.725306] __vm_munmap+0x138/0x3a0 [ 31.725856] __x64_sys_munmap+0x59/0x80 [ 31.726438] do_syscall_64+0x3f/0x90 [ 31.727024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.727786] [ 31.728036] The buggy address belongs to the object at ffff88800ebb10e8 [ 31.728036] which belongs to the cache vm_area_struct of size 168 [ 31.729790] The buggy address is located 88 bytes inside of [ 31.729790] freed 168-byte region [ffff88800ebb10e8, ffff88800ebb1190) [ 31.731500] [ 31.731766] The buggy address belongs to the physical page: [ 31.732593] page:000000004a80047b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebb1 [ 31.733944] memcg:ffff88800f27fb01 [ 31.734472] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.735354] page_type: 0xffffffff() [ 31.735920] raw: 0100000000000200 ffff88800879fc80 ffffea000057a600 dead000000000005 [ 31.737076] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f27fb01 [ 31.738220] page dumped because: kasan: bad access detected [ 31.739111] [ 31.739380] Memory state around the buggy address: [ 31.740081] ffff88800ebb1000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.740926] ffff88800ebb1080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.741770] >ffff88800ebb1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.742619] ^ [ 31.743272] ffff88800ebb1180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.744123] ffff88800ebb1200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.744962] ================================================================== [ 31.745879] Disabling lock debugging due to kernel taint [ 33.628081] BUG: Bad rss-counter state mm:0000000026768940 type:MM_FILEPAGES val:33 [ 33.628861] BUG: Bad rss-counter state mm:0000000026768940 type:MM_ANONPAGES val:22 [ 34.103779] BUG: Bad rss-counter state mm:000000000db80112 type:MM_FILEPAGES val:33 [ 34.104625] BUG: Bad rss-counter state mm:000000000db80112 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31552' (ECDSA) to the list of known hosts. 2023/06/19 11:36:51 fuzzer started 2023/06/19 11:36:51 dialing manager at localhost:44161 2023/06/19 11:36:51 checking machine... 2023/06/19 11:36:51 checking revisions... [ 34.834702] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:36:51 testing simple program... [ 34.882998] cgroup: Unknown subsys name 'net' [ 34.923458] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:36:49 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fffd1491ca8 CR3=0000000005482000 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=00007fdd78272510000056013979f790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8609675b RBX=0000000000000001 RCX=ffffffff86096756 RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c12ceb RBP=ffff888016a97260 RSP=ffff888016a97148 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff888016a97268 R13=ffff888016a97250 R14=ffff888016a97249 R15=ffff888016a97208 RIP=ffffffff81130aa8 RFL=00000216 [----AP-] 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 00007f678dbfd900 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=00007f5216814650 CR3=000000000d66e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=19e9c9298ce615a300000000000ae988 XMM05=9fb1075a065f87430000000000136560 XMM06=00c3ffa147b8d8570000000000135350 XMM07=fb795ef6d65770560000000000124850 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000