syzkaller login: [ 35.629412] BUG: Bad rss-counter state mm:00000000b2f00844 type:MM_FILEPAGES val:33 [ 35.630527] BUG: Bad rss-counter state mm:00000000b2f00844 type:MM_ANONPAGES val:22 [ 35.793949] ================================================================== [ 35.794900] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.795834] Read of size 8 at addr ffff888019d8b968 by task sshd/220 [ 35.796604] [ 35.796827] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.797861] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.798851] Call Trace: [ 35.799168] [ 35.799455] dump_stack_lvl+0x91/0xf0 [ 35.799965] print_report+0xcc/0x620 [ 35.800455] ? __virt_addr_valid+0x102/0x340 [ 35.801010] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.801629] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.802271] kasan_report+0xbe/0xf0 [ 35.802774] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.803396] vma_interval_tree_remove+0xc75/0xec0 [ 35.804002] vma_prepare+0xc54/0x11a0 [ 35.804478] __split_vma+0x5af/0x950 [ 35.804961] ? __pfx___split_vma+0x10/0x10 [ 35.805485] ? find_held_lock+0x2c/0x110 [ 35.806048] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.806617] ? lock_is_held_type+0x9f/0x120 [ 35.807161] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.807767] ? mtree_range_walk+0x632/0x900 [ 35.808322] ? mas_walk+0x5c7/0x7c0 [ 35.808802] do_vmi_munmap+0x1f1/0x2b0 [ 35.809301] mmap_region+0x1f9/0x2660 [ 35.809785] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.810316] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.811032] ? __pfx_lock_acquire+0x10/0x10 [ 35.811581] ? __pfx_mmap_region+0x10/0x10 [ 35.812113] ? security_mmap_addr+0x7d/0xa0 [ 35.812643] ? get_unmapped_area+0x1f5/0x3f0 [ 35.813193] do_mmap+0x854/0xf00 [ 35.813638] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.814143] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.814702] ksys_mmap_pgoff+0x3af/0x500 [ 35.815206] do_syscall_64+0x3f/0x90 [ 35.815691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.816330] RIP: 0033:0x7f477a568d82 [ 35.816785] 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 [ 35.818916] RSP: 002b:00007ffd1ffc7d78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.819849] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f477a568d82 [ 35.820703] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f47799a2000 [ 35.821546] RBP: 00007f47799a2000 R08: 0000000000000009 R09: 0000000000001000 [ 35.822428] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc8038eb20 [ 35.823266] R13: 00007ffd1ffc7d90 R14: 00007ffd1ffc7dc0 R15: 00007ffd1ffc8120 [ 35.824126] [ 35.824419] [ 35.824635] Allocated by task 212: [ 35.825064] kasan_save_stack+0x22/0x50 [ 35.825571] kasan_set_track+0x25/0x30 [ 35.826081] __kasan_slab_alloc+0x59/0x70 [ 35.826599] kmem_cache_alloc+0x16b/0x370 [ 35.827109] vm_area_dup+0x20/0x160 [ 35.827564] __split_vma+0x170/0x950 [ 35.828026] split_vma+0xc6/0x110 [ 35.828460] mprotect_fixup+0x8d2/0xb30 [ 35.828955] do_mprotect_pkey+0x87e/0xd40 [ 35.829478] __x64_sys_mprotect+0x78/0xc0 [ 35.830001] do_syscall_64+0x3f/0x90 [ 35.830471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.831102] [ 35.831318] Freed by task 212: [ 35.831709] kasan_save_stack+0x22/0x50 [ 35.832215] kasan_set_track+0x25/0x30 [ 35.832718] kasan_save_free_info+0x2b/0x50 [ 35.833248] __kasan_slab_free+0x10a/0x190 [ 35.833784] kmem_cache_free+0x10d/0x4d0 [ 35.834297] rcu_core+0x8c8/0x2860 [ 35.834749] __do_softirq+0x1b7/0x7d4 [ 35.835221] [ 35.835437] Last potentially related work creation: [ 35.836018] kasan_save_stack+0x22/0x50 [ 35.836512] __kasan_record_aux_stack+0x8e/0xa0 [ 35.837090] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.837732] remove_vma+0x139/0x170 [ 35.838308] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.839248] do_vmi_munmap+0x1f1/0x2b0 [ 35.839880] __vm_munmap+0x138/0x3a0 [ 35.840463] __x64_sys_munmap+0x59/0x80 [ 35.841088] do_syscall_64+0x3f/0x90 [ 35.841708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.842532] [ 35.842802] The buggy address belongs to the object at ffff888019d8b910 [ 35.842802] which belongs to the cache vm_area_struct of size 168 [ 35.844651] The buggy address is located 88 bytes inside of [ 35.844651] freed 168-byte region [ffff888019d8b910, ffff888019d8b9b8) [ 35.846459] [ 35.846695] The buggy address belongs to the physical page: [ 35.847352] page:00000000a2fcf200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d8b [ 35.848449] memcg:ffff888017b53c01 [ 35.848884] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.849615] page_type: 0xffffffff() [ 35.850092] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 35.851033] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017b53c01 [ 35.851951] page dumped because: kasan: bad access detected [ 35.852617] [ 35.852836] Memory state around the buggy address: [ 35.853429] ffff888019d8b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.854316] ffff888019d8b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.855191] >ffff888019d8b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.856057] ^ [ 35.856848] ffff888019d8b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 35.857722] ffff888019d8ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.858626] ================================================================== [ 35.859741] Disabling lock debugging due to kernel taint [ 37.915731] BUG: Bad rss-counter state mm:00000000996fd68e type:MM_FILEPAGES val:33 [ 37.916712] BUG: Bad rss-counter state mm:00000000996fd68e type:MM_ANONPAGES val:22 [ 38.477629] BUG: Bad rss-counter state mm:00000000e6860e95 type:MM_FILEPAGES val:33 [ 38.478903] BUG: Bad rss-counter state mm:00000000e6860e95 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17970' (ECDSA) to the list of known hosts. 2023/06/19 21:56:57 fuzzer started 2023/06/19 21:56:57 dialing manager at localhost:44161 2023/06/19 21:56:57 checking machine... 2023/06/19 21:56:57 checking revisions... [ 39.099640] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:56:57 testing simple program... [ 39.133735] cgroup: Unknown subsys name 'net' [ 39.158653] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:56:52 Registers: info registers vcpu 0 RAX=ffffffff818e03a4 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800ee67b01 RSI=ffff88800ee67b38 RDI=ffff88800ee67b38 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =ffffffff8614c362 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000024543 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88800ee67b40 R15=ffff88806ce09a98 RIP=ffffffff8112fbf3 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f33d30eb700 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=00007fa4e0360618 CR3=000000000f166000 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=2037353a36353a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a36353a3132203931 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=0000000000000001 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=00007fc9a0994000 CR3=000000000c7a6000 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=32707434931e56b5a24894ae7c6ecc84 XMM02=2c67c8bc2e329bc3000000000011c978 XMM03=fb795ef6d65770560000000000123be8 XMM04=3bf3f0beef7cab8100000000000ae988 XMM05=db16066acb5de64b0000000000134818 XMM06=806171799158d96700000000001338b8 XMM07=e042d86d42eb936e0000000000123e68 XMM08=cfc4dadea3ba81f7000000000011c9d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000