syzkaller login: [ 30.605050] BUG: Bad rss-counter state mm:000000009481a99c type:MM_FILEPAGES val:33 [ 30.606131] BUG: Bad rss-counter state mm:000000009481a99c type:MM_ANONPAGES val:22 [ 30.722990] ================================================================== [ 30.723951] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.724943] Read of size 8 at addr ffff888014797880 by task sshd/220 [ 30.725893] [ 30.726142] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.727046] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.728157] Call Trace: [ 30.728555] [ 30.728897] dump_stack_lvl+0x91/0xf0 [ 30.729486] print_report+0xcc/0x620 [ 30.730064] ? __virt_addr_valid+0x102/0x340 [ 30.730755] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.731497] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.732242] kasan_report+0xbe/0xf0 [ 30.732816] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.733575] vma_interval_tree_remove+0xc75/0xec0 [ 30.734330] vma_prepare+0xc54/0x11a0 [ 30.734919] __split_vma+0x5af/0x950 [ 30.735496] ? __pfx___split_vma+0x10/0x10 [ 30.736150] ? find_held_lock+0x2c/0x110 [ 30.736787] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.737470] ? lock_is_held_type+0x9f/0x120 [ 30.738178] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.738848] ? mtree_range_walk+0x632/0x900 [ 30.739454] ? mas_walk+0x5c7/0x7c0 [ 30.739976] do_vmi_munmap+0x1f1/0x2b0 [ 30.740519] mmap_region+0x1f9/0x2660 [ 30.741047] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.741604] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.742399] ? __pfx_lock_acquire+0x10/0x10 [ 30.742980] ? __pfx_mmap_region+0x10/0x10 [ 30.743558] ? security_mmap_addr+0x7d/0xa0 [ 30.744135] ? get_unmapped_area+0x1f5/0x3f0 [ 30.744735] do_mmap+0x854/0xf00 [ 30.745209] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.745748] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.746364] ksys_mmap_pgoff+0x3af/0x500 [ 30.746917] do_syscall_64+0x3f/0x90 [ 30.747434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.748137] RIP: 0033:0x7f9e58490d82 [ 30.748636] 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 [ 30.750962] RSP: 002b:00007ffdb12e0d78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.751939] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9e58490d82 [ 30.752861] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9e578ca000 [ 30.753779] RBP: 00007f9e578ca000 R08: 0000000000000009 R09: 0000000000001000 [ 30.754693] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d48f1cfb20 [ 30.755599] R13: 00007ffdb12e0d90 R14: 00007ffdb12e0dc0 R15: 00007ffdb12e1120 [ 30.756527] [ 30.756848] [ 30.757080] Allocated by task 213: [ 30.757545] kasan_save_stack+0x22/0x50 [ 30.758100] kasan_set_track+0x25/0x30 [ 30.758639] __kasan_slab_alloc+0x59/0x70 [ 30.759214] kmem_cache_alloc+0x16b/0x370 [ 30.759774] vm_area_dup+0x20/0x160 [ 30.760270] __split_vma+0x170/0x950 [ 30.760781] split_vma+0xc6/0x110 [ 30.761261] mprotect_fixup+0x8d2/0xb30 [ 30.761808] do_mprotect_pkey+0x87e/0xd40 [ 30.762392] __x64_sys_mprotect+0x78/0xc0 [ 30.762963] do_syscall_64+0x3f/0x90 [ 30.763487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.764191] [ 30.764423] Freed by task 213: [ 30.764851] kasan_save_stack+0x22/0x50 [ 30.765400] kasan_set_track+0x25/0x30 [ 30.765944] kasan_save_free_info+0x2b/0x50 [ 30.766529] __kasan_slab_free+0x10a/0x190 [ 30.767111] kmem_cache_free+0x10d/0x4d0 [ 30.767739] rcu_core+0x8c8/0x2860 [ 30.768224] __do_softirq+0x1b7/0x7d4 [ 30.768749] [ 30.768984] Last potentially related work creation: [ 30.769620] kasan_save_stack+0x22/0x50 [ 30.770183] __kasan_record_aux_stack+0x8e/0xa0 [ 30.770814] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.771510] remove_vma+0x139/0x170 [ 30.771996] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.772601] do_vmi_munmap+0x1f1/0x2b0 [ 30.773130] __vm_munmap+0x138/0x3a0 [ 30.773634] __x64_sys_munmap+0x59/0x80 [ 30.774182] do_syscall_64+0x3f/0x90 [ 30.774693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.775378] [ 30.775605] The buggy address belongs to the object at ffff888014797828 [ 30.775605] which belongs to the cache vm_area_struct of size 168 [ 30.777159] The buggy address is located 88 bytes inside of [ 30.777159] freed 168-byte region [ffff888014797828, ffff8880147978d0) [ 30.778642] [ 30.778872] The buggy address belongs to the physical page: [ 30.779559] page:0000000076758cec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14797 [ 30.780706] memcg:ffff888014795101 [ 30.781152] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.781833] page_type: 0xffffffff() [ 30.782311] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.783306] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014795101 [ 30.784303] page dumped because: kasan: bad access detected [ 30.785011] [ 30.785245] Memory state around the buggy address: [ 30.785874] ffff888014797780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.786817] ffff888014797800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.787752] >ffff888014797880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.788681] ^ [ 30.789131] ffff888014797900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.790060] ffff888014797980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.790996] ================================================================== [ 30.791980] Disabling lock debugging due to kernel taint [ 32.811896] BUG: Bad rss-counter state mm:0000000086558216 type:MM_FILEPAGES val:33 [ 32.813315] BUG: Bad rss-counter state mm:0000000086558216 type:MM_ANONPAGES val:22 [ 33.280184] BUG: Bad rss-counter state mm:00000000a2ad4e9c type:MM_FILEPAGES val:33 [ 33.281301] BUG: Bad rss-counter state mm:00000000a2ad4e9c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62530' (ECDSA) to the list of known hosts. 2023/06/21 09:41:18 fuzzer started 2023/06/21 09:41:18 dialing manager at localhost:36067 2023/06/21 09:41:18 checking machine... 2023/06/21 09:41:18 checking revisions... [ 33.981307] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:41:19 testing simple program... [ 34.039361] cgroup: Unknown subsys name 'net' [ 34.098564] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:41:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c6bc800 RCX=ffff88800c6b8000 RDX=00000000000006c0 RSI=ffff88800c6bc000 RDI=ffff888008442000 RBP=0000000000000000 RSP=ffff88800e297c28 R8 =0000000000001000 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6a61 R12=ffff888008442000 R13=0000000000000001 R14=ffff88800c6bc6b8 R15=ffff88800c6bc030 RIP=ffffffff8180eff0 RFL=00000286 [--S--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 00007fd42f780900 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=00007fd42fd37618 CR3=000000000efa8000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffff4f0c448 CR3=0000000005482000 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=00007fbef3738510000056383b72c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000