syzkaller login: [ 35.676292] BUG: Bad rss-counter state mm:00000000b683d063 type:MM_FILEPAGES val:33 [ 35.677028] BUG: Bad rss-counter state mm:00000000b683d063 type:MM_ANONPAGES val:22 [ 35.707396] ================================================================== [ 35.708215] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.708934] Read of size 8 at addr ffff888018144058 by task sshd/220 [ 35.709612] [ 35.709805] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.710451] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.711201] Call Trace: [ 35.711578] [ 35.711839] dump_stack_lvl+0x91/0xf0 [ 35.712171] print_report+0xcc/0x620 [ 35.712609] ? __virt_addr_valid+0x102/0x340 [ 35.713038] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.713484] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.713896] kasan_report+0xbe/0xf0 [ 35.714207] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.714803] vma_interval_tree_remove+0xc75/0xec0 [ 35.715209] vma_prepare+0xc54/0x11a0 [ 35.715560] __split_vma+0x5af/0x950 [ 35.715870] ? __pfx___split_vma+0x10/0x10 [ 35.716212] ? find_held_lock+0x2c/0x110 [ 35.716548] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.716917] ? lock_is_held_type+0x9f/0x120 [ 35.717266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.717654] ? mtree_range_walk+0x632/0x900 [ 35.718015] ? mas_walk+0x5c7/0x7c0 [ 35.718321] do_vmi_munmap+0x1f1/0x2b0 [ 35.718645] mmap_region+0x1f9/0x2660 [ 35.718960] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.719300] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.719850] ? __pfx_lock_acquire+0x10/0x10 [ 35.720200] ? __pfx_mmap_region+0x10/0x10 [ 35.720537] ? security_mmap_addr+0x7d/0xa0 [ 35.720891] ? get_unmapped_area+0x1f5/0x3f0 [ 35.721252] do_mmap+0x854/0xf00 [ 35.721535] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.721879] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.722250] ksys_mmap_pgoff+0x3af/0x500 [ 35.722578] do_syscall_64+0x3f/0x90 [ 35.722908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.723325] RIP: 0033:0x7f1d462b2d82 [ 35.723693] 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 [ 35.725113] RSP: 002b:00007fff73b65828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.725705] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d462b2d82 [ 35.726253] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d456ec000 [ 35.726805] RBP: 00007f1d456ec000 R08: 0000000000000009 R09: 0000000000001000 [ 35.727373] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b8afb9bec0 [ 35.727970] R13: 00007fff73b65840 R14: 00007fff73b65870 R15: 00007fff73b65bd0 [ 35.728577] [ 35.728801] [ 35.728951] Allocated by task 213: [ 35.729254] kasan_save_stack+0x22/0x50 [ 35.729609] kasan_set_track+0x25/0x30 [ 35.729948] __kasan_slab_alloc+0x59/0x70 [ 35.730314] kmem_cache_alloc+0x16b/0x370 [ 35.730663] vm_area_dup+0x20/0x160 [ 35.730967] __split_vma+0x170/0x950 [ 35.731291] split_vma+0xc6/0x110 [ 35.731653] mprotect_fixup+0x8d2/0xb30 [ 35.732017] do_mprotect_pkey+0x87e/0xd40 [ 35.732378] __x64_sys_mprotect+0x78/0xc0 [ 35.732767] do_syscall_64+0x3f/0x90 [ 35.733193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.733739] [ 35.733911] Freed by task 13: [ 35.734168] kasan_save_stack+0x22/0x50 [ 35.734509] kasan_set_track+0x25/0x30 [ 35.734836] kasan_save_free_info+0x2b/0x50 [ 35.735186] __kasan_slab_free+0x10a/0x190 [ 35.735572] kmem_cache_free+0x10d/0x4d0 [ 35.735911] rcu_core+0x8c8/0x2860 [ 35.736218] __do_softirq+0x1b7/0x7d4 [ 35.736562] [ 35.736721] Last potentially related work creation: [ 35.737141] kasan_save_stack+0x22/0x50 [ 35.737483] __kasan_record_aux_stack+0x8e/0xa0 [ 35.737881] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.738323] remove_vma+0x139/0x170 [ 35.738646] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.739036] do_vmi_munmap+0x1f1/0x2b0 [ 35.739373] __vm_munmap+0x138/0x3a0 [ 35.739779] __x64_sys_munmap+0x59/0x80 [ 35.740150] do_syscall_64+0x3f/0x90 [ 35.740478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.740938] [ 35.741095] The buggy address belongs to the object at ffff888018144000 [ 35.741095] which belongs to the cache vm_area_struct of size 168 [ 35.742090] The buggy address is located 88 bytes inside of [ 35.742090] freed 168-byte region [ffff888018144000, ffff8880181440a8) [ 35.742998] [ 35.743140] The buggy address belongs to the physical page: [ 35.743627] page:000000004f9c1090 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18144 [ 35.744386] memcg:ffff888013fbfb01 [ 35.744679] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.745143] page_type: 0xffffffff() [ 35.745488] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.746159] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013fbfb01 [ 35.746781] page dumped because: kasan: bad access detected [ 35.747238] [ 35.747376] Memory state around the buggy address: [ 35.747798] ffff888018143f00: fa fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb [ 35.748373] ffff888018143f80: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 35.748955] >ffff888018144000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.749578] ^ [ 35.750072] ffff888018144080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 35.750636] ffff888018144100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.751254] ================================================================== [ 35.752110] Disabling lock debugging due to kernel taint [ 37.822530] BUG: Bad rss-counter state mm:00000000b55597f1 type:MM_FILEPAGES val:33 [ 37.823179] BUG: Bad rss-counter state mm:00000000b55597f1 type:MM_ANONPAGES val:22 [ 38.196591] BUG: Bad rss-counter state mm:000000003c591fdc type:MM_FILEPAGES val:33 [ 38.197716] BUG: Bad rss-counter state mm:000000003c591fdc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11643' (ECDSA) to the list of known hosts. 2023/06/20 08:39:26 fuzzer started 2023/06/20 08:39:26 dialing manager at localhost:44161 2023/06/20 08:39:26 checking machine... 2023/06/20 08:39:26 checking revisions... [ 38.791786] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:39:27 testing simple program... [ 38.829108] cgroup: Unknown subsys name 'net' [ 38.862974] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:39:21 Registers: info registers vcpu 0 RAX=ffffffff8137ab10 RBX=000000000000000a RCX=ffffffff84531e74 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff85d3bed0 RBP=ffffffff8540a108 RSP=ffff88806ce09f80 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=0000000000000102 R13=0000000000000009 R14=0000000000000200 R15=0000000000000009 RIP=ffffffff84531d9f RFL=00000246 [---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 00007fa460713900 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=00007ffd7bd8a000 CR3=000000000e8b8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007f3b729e0f18 CR3=000000000c6f6000 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=55bda0879b6d35b7c54cd5edfaa4c436 XMM02=000000000011cd78ec2efd57dc4c00df XMM03=00000000001242f030d1f10236dccc55 XMM04=83046e255bebae1500000000000ae988 XMM05=19e9129bd510f2350000000000133e90 XMM06=665cdc64b418cd780000000000132cf8 XMM07=e042d86d42eb936e0000000000124570 XMM08=30d1f10236dccc55000000000011cdd8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000