syzkaller login: [ 34.318024] BUG: Bad rss-counter state mm:00000000989621aa type:MM_FILEPAGES val:33 [ 34.319670] BUG: Bad rss-counter state mm:00000000989621aa type:MM_ANONPAGES val:22 [ 34.495292] ================================================================== [ 34.496217] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.497173] Read of size 8 at addr ffff8880146146b0 by task sshd/220 [ 34.498038] [ 34.498261] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.499134] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.500165] Call Trace: [ 34.500495] [ 34.500792] dump_stack_lvl+0x91/0xf0 [ 34.501292] print_report+0xcc/0x620 [ 34.501807] ? __virt_addr_valid+0x102/0x340 [ 34.502387] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.503013] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.503639] kasan_report+0xbe/0xf0 [ 34.504120] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.504753] vma_interval_tree_remove+0xc75/0xec0 [ 34.505371] vma_prepare+0xc54/0x11a0 [ 34.505868] __split_vma+0x5af/0x950 [ 34.506357] ? __pfx___split_vma+0x10/0x10 [ 34.506894] ? find_held_lock+0x2c/0x110 [ 34.507418] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.507985] ? lock_is_held_type+0x9f/0x120 [ 34.508535] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.509144] ? mtree_range_walk+0x632/0x900 [ 34.509717] ? mas_walk+0x5c7/0x7c0 [ 34.510198] do_vmi_munmap+0x1f1/0x2b0 [ 34.510697] mmap_region+0x1f9/0x2660 [ 34.511205] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.511726] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.512439] ? __pfx_lock_acquire+0x10/0x10 [ 34.512976] ? __pfx_mmap_region+0x10/0x10 [ 34.513522] ? security_mmap_addr+0x7d/0xa0 [ 34.514101] ? get_unmapped_area+0x1f5/0x3f0 [ 34.514663] do_mmap+0x854/0xf00 [ 34.515103] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.515618] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.516189] ksys_mmap_pgoff+0x3af/0x500 [ 34.516719] do_syscall_64+0x3f/0x90 [ 34.517204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.517863] RIP: 0033:0x7f070b61cd82 [ 34.518335] 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 [ 34.520499] RSP: 002b:00007fff0ac3c948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.521434] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f070b61cd82 [ 34.522321] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f070aa56000 [ 34.523170] RBP: 00007f070aa56000 R08: 0000000000000009 R09: 0000000000001000 [ 34.524035] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c9e484bf70 [ 34.524879] R13: 00007fff0ac3c960 R14: 00007fff0ac3c990 R15: 00007fff0ac3ccf0 [ 34.525768] [ 34.526064] [ 34.526283] Allocated by task 213: [ 34.526716] kasan_save_stack+0x22/0x50 [ 34.527236] kasan_set_track+0x25/0x30 [ 34.527730] __kasan_slab_alloc+0x59/0x70 [ 34.528261] kmem_cache_alloc+0x16b/0x370 [ 34.528786] vm_area_dup+0x20/0x160 [ 34.529253] __split_vma+0x170/0x950 [ 34.529732] split_vma+0xc6/0x110 [ 34.530183] mprotect_fixup+0x8d2/0xb30 [ 34.530698] do_mprotect_pkey+0x87e/0xd40 [ 34.531233] __x64_sys_mprotect+0x78/0xc0 [ 34.531754] do_syscall_64+0x3f/0x90 [ 34.532236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.532898] [ 34.533116] Freed by task 19: [ 34.533510] kasan_save_stack+0x22/0x50 [ 34.534046] kasan_set_track+0x25/0x30 [ 34.534544] kasan_save_free_info+0x2b/0x50 [ 34.535077] __kasan_slab_free+0x10a/0x190 [ 34.535623] kmem_cache_free+0x10d/0x4d0 [ 34.536144] rcu_core+0x8c8/0x2860 [ 34.536602] __do_softirq+0x1b7/0x7d4 [ 34.537080] [ 34.537297] Last potentially related work creation: [ 34.537893] kasan_save_stack+0x22/0x50 [ 34.538398] __kasan_record_aux_stack+0x8e/0xa0 [ 34.538978] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.539620] remove_vma+0x139/0x170 [ 34.540073] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.540631] do_vmi_munmap+0x1f1/0x2b0 [ 34.541136] __vm_munmap+0x138/0x3a0 [ 34.541623] __x64_sys_munmap+0x59/0x80 [ 34.542124] do_syscall_64+0x3f/0x90 [ 34.542669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.543327] [ 34.543545] The buggy address belongs to the object at ffff888014614658 [ 34.543545] which belongs to the cache vm_area_struct of size 168 [ 34.545036] The buggy address is located 88 bytes inside of [ 34.545036] freed 168-byte region [ffff888014614658, ffff888014614700) [ 34.546465] [ 34.546685] The buggy address belongs to the physical page: [ 34.547348] page:00000000a4b66dbb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14614 [ 34.548433] memcg:ffff888018f42f01 [ 34.548860] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.549505] page_type: 0xffffffff() [ 34.549970] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.550883] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f42f01 [ 34.551786] page dumped because: kasan: bad access detected [ 34.552459] [ 34.552678] Memory state around the buggy address: [ 34.553259] ffff888014614580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.554136] ffff888014614600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.555004] >ffff888014614680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.555861] ^ [ 34.556456] ffff888014614700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.557308] ffff888014614780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.558193] ================================================================== [ 34.559134] Disabling lock debugging due to kernel taint [ 36.505972] BUG: Bad rss-counter state mm:00000000f3eb7831 type:MM_FILEPAGES val:33 [ 36.507684] BUG: Bad rss-counter state mm:00000000f3eb7831 type:MM_ANONPAGES val:22 [ 37.078036] BUG: Bad rss-counter state mm:00000000091669fa type:MM_FILEPAGES val:33 [ 37.079214] BUG: Bad rss-counter state mm:00000000091669fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61651' (ECDSA) to the list of known hosts. 2023/06/19 11:16:05 fuzzer started 2023/06/19 11:16:05 dialing manager at localhost:44161 2023/06/19 11:16:05 checking machine... 2023/06/19 11:16:05 checking revisions... [ 37.768347] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:16:05 testing simple program... [ 37.814566] cgroup: Unknown subsys name 'net' [ 37.855667] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:16:01 Registers: info registers vcpu 0 RAX=ffffffff86136dac RBX=0000000000000001 RCX=ffffffff81808307 RDX=0000000000000000 RSI=ffffffff86136dac RDI=ffffffff85dfc514 RBP=ffff888016caf368 RSP=ffff888016caf280 R8 =ffffffff86136dac R9 =ffff888016caf350 R10=0000000000038001 R11=0000000000020c50 R12=ffff888016caf370 R13=ffffffff85dfc514 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcbb RFL=00000282 [--S----] 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 00007f9b7abde900 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=00007f9b7b195618 CR3=0000000016dea000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f2824fbdf30 CR3=000000000c546000 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=2034303a36313a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a36313a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000