syzkaller login: [ 44.539586] BUG: Bad rss-counter state mm:000000003cde7c20 type:MM_FILEPAGES val:33 [ 44.541205] BUG: Bad rss-counter state mm:000000003cde7c20 type:MM_ANONPAGES val:22 [ 44.713866] ================================================================== [ 44.714795] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.715731] Read of size 8 at addr ffff8880144d46b0 by task sshd/229 [ 44.716570] [ 44.716826] CPU: 0 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.717712] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.718735] Call Trace: [ 44.719072] [ 44.719374] dump_stack_lvl+0x91/0xf0 [ 44.719897] print_report+0xcc/0x620 [ 44.720410] ? __virt_addr_valid+0x102/0x340 [ 44.721026] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.721679] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.722341] kasan_report+0xbe/0xf0 [ 44.722851] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.723519] vma_interval_tree_remove+0xc75/0xec0 [ 44.724169] vma_prepare+0xc54/0x11a0 [ 44.724694] __split_vma+0x5af/0x950 [ 44.725207] ? __pfx___split_vma+0x10/0x10 [ 44.725772] ? find_held_lock+0x2c/0x110 [ 44.726339] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.726949] ? lock_is_held_type+0x9f/0x120 [ 44.727525] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.728182] ? mtree_range_walk+0x632/0x900 [ 44.728797] ? mas_walk+0x5c7/0x7c0 [ 44.729305] do_vmi_munmap+0x1f1/0x2b0 [ 44.729833] mmap_region+0x1f9/0x2660 [ 44.730349] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.730898] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.731658] ? __pfx_lock_acquire+0x10/0x10 [ 44.732225] ? __pfx_mmap_region+0x10/0x10 [ 44.732806] ? security_mmap_addr+0x7d/0xa0 [ 44.733376] ? get_unmapped_area+0x1f5/0x3f0 [ 44.733974] do_mmap+0x854/0xf00 [ 44.734444] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.734976] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.735578] ksys_mmap_pgoff+0x3af/0x500 [ 44.736124] do_syscall_64+0x3f/0x90 [ 44.736642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.737336] RIP: 0033:0x7f6e0ac42d82 [ 44.737828] 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 [ 44.740165] RSP: 002b:00007fff013933f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.741177] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e0ac42d82 [ 44.742116] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e0a07c000 [ 44.743029] RBP: 00007f6e0a07c000 R08: 0000000000000009 R09: 0000000000001000 [ 44.743961] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b9a2a8aec0 [ 44.744895] R13: 00007fff01393410 R14: 00007fff01393440 R15: 00007fff013937a0 [ 44.745850] [ 44.746170] [ 44.746404] Allocated by task 222: [ 44.746882] kasan_save_stack+0x22/0x50 [ 44.747443] kasan_set_track+0x25/0x30 [ 44.747993] __kasan_slab_alloc+0x59/0x70 [ 44.748571] kmem_cache_alloc+0x16b/0x370 [ 44.749163] vm_area_dup+0x20/0x160 [ 44.749670] __split_vma+0x170/0x950 [ 44.750185] split_vma+0xc6/0x110 [ 44.750664] mprotect_fixup+0x8d2/0xb30 [ 44.751218] do_mprotect_pkey+0x87e/0xd40 [ 44.751798] __x64_sys_mprotect+0x78/0xc0 [ 44.752378] do_syscall_64+0x3f/0x90 [ 44.752909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.753619] [ 44.753857] Freed by task 222: [ 44.754295] kasan_save_stack+0x22/0x50 [ 44.754852] kasan_set_track+0x25/0x30 [ 44.755398] kasan_save_free_info+0x2b/0x50 [ 44.755999] __kasan_slab_free+0x10a/0x190 [ 44.756585] kmem_cache_free+0x10d/0x4d0 [ 44.757170] rcu_core+0x8c8/0x2860 [ 44.757672] __do_softirq+0x1b7/0x7d4 [ 44.758202] [ 44.758439] Last potentially related work creation: [ 44.759089] kasan_save_stack+0x22/0x50 [ 44.759654] __kasan_record_aux_stack+0x8e/0xa0 [ 44.760287] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.761010] remove_vma+0x139/0x170 [ 44.761510] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.762138] do_vmi_munmap+0x1f1/0x2b0 [ 44.762674] __vm_munmap+0x138/0x3a0 [ 44.763201] __x64_sys_munmap+0x59/0x80 [ 44.763750] do_syscall_64+0x3f/0x90 [ 44.764276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.764998] [ 44.765235] The buggy address belongs to the object at ffff8880144d4658 [ 44.765235] which belongs to the cache vm_area_struct of size 168 [ 44.766875] The buggy address is located 88 bytes inside of [ 44.766875] freed 168-byte region [ffff8880144d4658, ffff8880144d4700) [ 44.768441] [ 44.768697] The buggy address belongs to the physical page: [ 44.769428] page:00000000b089a2ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x144d4 [ 44.770636] memcg:ffff88800e127301 [ 44.771105] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.771827] page_type: 0xffffffff() [ 44.772327] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.773353] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e127301 [ 44.774360] page dumped because: kasan: bad access detected [ 44.775097] [ 44.775337] Memory state around the buggy address: [ 44.775982] ffff8880144d4580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.776949] ffff8880144d4600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 44.777905] >ffff8880144d4680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.778851] ^ [ 44.779497] ffff8880144d4700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 44.780445] ffff8880144d4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 44.781415] ================================================================== [ 44.782645] Disabling lock debugging due to kernel taint [ 46.896562] BUG: Bad rss-counter state mm:000000006541d2c5 type:MM_FILEPAGES val:33 [ 46.897768] BUG: Bad rss-counter state mm:000000006541d2c5 type:MM_ANONPAGES val:22 [ 47.378570] BUG: Bad rss-counter state mm:0000000044c830a0 type:MM_FILEPAGES val:33 [ 47.379819] BUG: Bad rss-counter state mm:0000000044c830a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53690' (ECDSA) to the list of known hosts. 2023/06/19 21:21:28 fuzzer started 2023/06/19 21:21:28 dialing manager at localhost:44161 2023/06/19 21:21:28 checking machine... 2023/06/19 21:21:28 checking revisions... [ 48.071411] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:21:29 testing simple program... [ 48.119617] cgroup: Unknown subsys name 'net' [ 48.161565] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:21:14 Registers: info registers vcpu 0 RAX=1ffffffff0c11183 RBX=0000000000000001 RCX=ffffffff86088c1a RDX=dffffc0000000000 RSI=0000000000000000 RDI=ffff88800fdef928 RBP=ffff88800fdef930 RSP=ffff88800fdef818 R8 =ffffffff86088c1e R9 =ffff88800fdef918 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800fdef938 R13=ffff88800fdef920 R14=ffff88800fdef970 R15=ffff88800fdef8d8 RIP=ffffffff8113173f RFL=00000212 [----A--] 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 00007f79e86ec900 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=00007f79e8ca1650 CR3=000000000e3f6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f79e86a001c CR3=0000000018684000 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=2038323a31323a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3833 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3833325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a31323a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000