syzkaller login: [ 30.672573] BUG: Bad rss-counter state mm:00000000fcf085af type:MM_FILEPAGES val:33 [ 30.673933] BUG: Bad rss-counter state mm:00000000fcf085af type:MM_ANONPAGES val:22 [ 30.835160] ================================================================== [ 30.836087] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.837030] Read of size 8 at addr ffff888016f583f8 by task sshd/220 [ 30.837815] [ 30.838033] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.839021] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.840006] Call Trace: [ 30.840344] [ 30.840632] dump_stack_lvl+0x91/0xf0 [ 30.841140] print_report+0xcc/0x620 [ 30.841626] ? __virt_addr_valid+0x102/0x340 [ 30.842185] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.842815] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.843455] kasan_report+0xbe/0xf0 [ 30.843941] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.844571] vma_interval_tree_remove+0xc75/0xec0 [ 30.845191] vma_prepare+0xc54/0x11a0 [ 30.845674] __split_vma+0x5af/0x950 [ 30.846148] ? __pfx___split_vma+0x10/0x10 [ 30.846681] ? find_held_lock+0x2c/0x110 [ 30.847214] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.847786] ? lock_is_held_type+0x9f/0x120 [ 30.848330] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.848941] ? mtree_range_walk+0x632/0x900 [ 30.849501] ? mas_walk+0x5c7/0x7c0 [ 30.849988] do_vmi_munmap+0x1f1/0x2b0 [ 30.850489] mmap_region+0x1f9/0x2660 [ 30.850993] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.851504] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.852225] ? __pfx_lock_acquire+0x10/0x10 [ 30.852764] ? __pfx_mmap_region+0x10/0x10 [ 30.853299] ? security_mmap_addr+0x7d/0xa0 [ 30.853835] ? get_unmapped_area+0x1f5/0x3f0 [ 30.854391] do_mmap+0x854/0xf00 [ 30.854835] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.855363] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.855926] ksys_mmap_pgoff+0x3af/0x500 [ 30.856436] do_syscall_64+0x3f/0x90 [ 30.856917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.857579] RIP: 0033:0x7fcf859ecd82 [ 30.858037] 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 [ 30.860209] RSP: 002b:00007ffe83452e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.861122] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcf859ecd82 [ 30.861988] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcf84e26000 [ 30.862848] RBP: 00007fcf84e26000 R08: 0000000000000009 R09: 0000000000001000 [ 30.863714] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f752707ec0 [ 30.864560] R13: 00007ffe83452e50 R14: 00007ffe83452e80 R15: 00007ffe834531e0 [ 30.865427] [ 30.865724] [ 30.865941] Allocated by task 212: [ 30.866378] kasan_save_stack+0x22/0x50 [ 30.866882] kasan_set_track+0x25/0x30 [ 30.867389] __kasan_slab_alloc+0x59/0x70 [ 30.867917] kmem_cache_alloc+0x16b/0x370 [ 30.868431] vm_area_dup+0x20/0x160 [ 30.868887] __split_vma+0x170/0x950 [ 30.869357] split_vma+0xc6/0x110 [ 30.869800] mprotect_fixup+0x8d2/0xb30 [ 30.870301] do_mprotect_pkey+0x87e/0xd40 [ 30.870826] __x64_sys_mprotect+0x78/0xc0 [ 30.871373] do_syscall_64+0x3f/0x90 [ 30.871853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.872501] [ 30.872721] Freed by task 212: [ 30.873112] kasan_save_stack+0x22/0x50 [ 30.873620] kasan_set_track+0x25/0x30 [ 30.874125] kasan_save_free_info+0x2b/0x50 [ 30.874662] __kasan_slab_free+0x10a/0x190 [ 30.875209] kmem_cache_free+0x10d/0x4d0 [ 30.875713] rcu_core+0x8c8/0x2860 [ 30.876162] __do_softirq+0x1b7/0x7d4 [ 30.876648] [ 30.876865] Last potentially related work creation: [ 30.877453] kasan_save_stack+0x22/0x50 [ 30.877961] __kasan_record_aux_stack+0x8e/0xa0 [ 30.878540] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.879210] remove_vma+0x139/0x170 [ 30.879670] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.880233] do_vmi_munmap+0x1f1/0x2b0 [ 30.880728] __vm_munmap+0x138/0x3a0 [ 30.881193] __x64_sys_munmap+0x59/0x80 [ 30.881706] do_syscall_64+0x3f/0x90 [ 30.882190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.882844] [ 30.883067] The buggy address belongs to the object at ffff888016f583a0 [ 30.883067] which belongs to the cache vm_area_struct of size 168 [ 30.884551] The buggy address is located 88 bytes inside of [ 30.884551] freed 168-byte region [ffff888016f583a0, ffff888016f58448) [ 30.885966] [ 30.886186] The buggy address belongs to the physical page: [ 30.886863] page:00000000415a9298 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f58 [ 30.887971] memcg:ffff888016f59001 [ 30.888403] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.889047] page_type: 0xffffffff() [ 30.889501] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.890432] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f59001 [ 30.891365] page dumped because: kasan: bad access detected [ 30.892041] [ 30.892257] Memory state around the buggy address: [ 30.892847] ffff888016f58280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.893717] ffff888016f58300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.894596] >ffff888016f58380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.895458] ^ [ 30.896317] ffff888016f58400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.897196] ffff888016f58480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.898056] ================================================================== [ 30.899077] Disabling lock debugging due to kernel taint [ 32.706469] BUG: Bad rss-counter state mm:00000000ad174821 type:MM_FILEPAGES val:33 [ 32.707676] BUG: Bad rss-counter state mm:00000000ad174821 type:MM_ANONPAGES val:22 [ 33.049666] BUG: Bad rss-counter state mm:0000000076275583 type:MM_FILEPAGES val:33 [ 33.050410] BUG: Bad rss-counter state mm:0000000076275583 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48313' (ECDSA) to the list of known hosts. 2023/06/21 05:16:01 fuzzer started 2023/06/21 05:16:02 dialing manager at localhost:36067 2023/06/21 05:16:02 checking machine... 2023/06/21 05:16:02 checking revisions... [ 33.739757] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:16:02 testing simple program... [ 33.782122] cgroup: Unknown subsys name 'net' [ 33.820957] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:16:01 Registers: info registers vcpu 0 RAX=00005601a7e38774 RBX=00005601a7e4d3f0 RCX=000000000000002e RDX=00007ffc7de6b500 RSI=00005601a7e38774 RDI=0000000000000002 RBP=0000000000000008 RSP=00007ffc7de6b438 R8 =00005601a7e38740 R9 =0000000000000000 R10=0000000000000000 R11=00007f1e21d243c0 R12=00005601a7e4d3f0 R13=00007ffc7de6b500 R14=00005601a7e50480 R15=00007ffc7de6b500 RIP=00007f1e21ccd1d0 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1e217be900 00000000 00000000 GS =0000 0000000000000000 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=00007f1e21d75618 CR3=000000000e3f4000 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=563412feff00545000000000000080fe 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=ffffffff864b381a RBX=ffffffff8604fbd0 RCX=ffffffff845137d6 RDX=0000000000000000 RSI=ffffffff864b3802 RDI=ffffffff8604fbc0 RBP=ffffffff8604fbd4 RSP=ffff88806cf099c8 R8 =ffffffff864b3802 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b547f R12=ffffffff8604fbd0 R13=ffffffff8604fbc0 R14=0000000000000004 R15=dffffc0000000000 RIP=ffffffff8112fcb7 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 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=00007fdf18a51030 CR3=000000000d8ac000 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=2031303a36313a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a36313a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000