syzkaller login: [ 61.456092] BUG: Bad rss-counter state mm:00000000c3cdb6e0 type:MM_FILEPAGES val:33 [ 61.457327] BUG: Bad rss-counter state mm:00000000c3cdb6e0 type:MM_ANONPAGES val:22 [ 61.495845] ================================================================== [ 61.496898] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.497928] Read of size 8 at addr ffff88800efab968 by task sshd/221 [ 61.498783] [ 61.499023] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.499967] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.501050] Call Trace: [ 61.501402] [ 61.501716] dump_stack_lvl+0x91/0xf0 [ 61.502261] print_report+0xcc/0x620 [ 61.502808] ? __virt_addr_valid+0x102/0x340 [ 61.503421] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.504103] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.504781] kasan_report+0xbe/0xf0 [ 61.505301] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.505986] vma_interval_tree_remove+0xc75/0xec0 [ 61.506674] vma_prepare+0xc54/0x11a0 [ 61.507201] __split_vma+0x5af/0x950 [ 61.507718] ? __pfx___split_vma+0x10/0x10 [ 61.508301] ? find_held_lock+0x2c/0x110 [ 61.508874] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.509502] ? lock_is_held_type+0x9f/0x120 [ 61.510097] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.510776] ? mtree_range_walk+0x632/0x900 [ 61.511386] ? mas_walk+0x5c7/0x7c0 [ 61.511911] do_vmi_munmap+0x1f1/0x2b0 [ 61.512456] mmap_region+0x1f9/0x2660 [ 61.512991] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.513559] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.514344] ? __pfx_lock_acquire+0x10/0x10 [ 61.514940] ? __pfx_mmap_region+0x10/0x10 [ 61.515522] ? security_mmap_addr+0x7d/0xa0 [ 61.516104] ? get_unmapped_area+0x1f5/0x3f0 [ 61.516705] do_mmap+0x854/0xf00 [ 61.517192] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.517731] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.518350] ksys_mmap_pgoff+0x3af/0x500 [ 61.518918] do_syscall_64+0x3f/0x90 [ 61.519454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.520167] RIP: 0033:0x7fcac5c0ed82 [ 61.520672] 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 [ 61.523024] RSP: 002b:00007fff2e2b85e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.523837] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcac5c0ed82 [ 61.524407] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcac5048000 [ 61.524975] RBP: 00007fcac5048000 R08: 0000000000000009 R09: 0000000000001000 [ 61.525569] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ae19ccf70 [ 61.526136] R13: 00007fff2e2b8600 R14: 00007fff2e2b8630 R15: 00007fff2e2b8990 [ 61.526720] [ 61.526918] [ 61.527062] Allocated by task 214: [ 61.527359] kasan_save_stack+0x22/0x50 [ 61.527701] kasan_set_track+0x25/0x30 [ 61.528033] __kasan_slab_alloc+0x59/0x70 [ 61.528380] kmem_cache_alloc+0x16b/0x370 [ 61.528725] vm_area_dup+0x20/0x160 [ 61.529031] __split_vma+0x170/0x950 [ 61.529339] split_vma+0xc6/0x110 [ 61.529629] mprotect_fixup+0x8d2/0xb30 [ 61.529962] do_mprotect_pkey+0x87e/0xd40 [ 61.530305] __x64_sys_mprotect+0x78/0xc0 [ 61.530667] do_syscall_64+0x3f/0x90 [ 61.530983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.531412] [ 61.531554] Freed by task 214: [ 61.531816] kasan_save_stack+0x22/0x50 [ 61.532153] kasan_set_track+0x25/0x30 [ 61.532482] kasan_save_free_info+0x2b/0x50 [ 61.532839] __kasan_slab_free+0x10a/0x190 [ 61.533190] kmem_cache_free+0x10d/0x4d0 [ 61.533525] rcu_core+0x8c8/0x2860 [ 61.533822] __do_softirq+0x1b7/0x7d4 [ 61.534138] [ 61.534283] Last potentially related work creation: [ 61.534677] kasan_save_stack+0x22/0x50 [ 61.535016] __kasan_record_aux_stack+0x8e/0xa0 [ 61.535399] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.535826] remove_vma+0x139/0x170 [ 61.536125] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.536492] do_vmi_munmap+0x1f1/0x2b0 [ 61.536812] __vm_munmap+0x138/0x3a0 [ 61.537121] __x64_sys_munmap+0x59/0x80 [ 61.537449] do_syscall_64+0x3f/0x90 [ 61.537766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.538191] [ 61.538333] Second to last potentially related work creation: [ 61.538786] kasan_save_stack+0x22/0x50 [ 61.539115] __kasan_record_aux_stack+0x8e/0xa0 [ 61.539493] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.539917] remove_vma+0x139/0x170 [ 61.540212] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.540578] do_vmi_munmap+0x1f1/0x2b0 [ 61.540900] mmap_region+0x1f9/0x2660 [ 61.541216] do_mmap+0x854/0xf00 [ 61.541502] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.541824] ksys_mmap_pgoff+0x3af/0x500 [ 61.542152] do_syscall_64+0x3f/0x90 [ 61.542487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.542912] [ 61.543055] The buggy address belongs to the object at ffff88800efab910 [ 61.543055] which belongs to the cache vm_area_struct of size 168 [ 61.544019] The buggy address is located 88 bytes inside of [ 61.544019] freed 168-byte region [ffff88800efab910, ffff88800efab9b8) [ 61.544943] [ 61.545087] The buggy address belongs to the physical page: [ 61.545519] page:000000001b532aef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefab [ 61.546231] memcg:ffff88800d288301 [ 61.546522] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.546982] page_type: 0xffffffff() [ 61.547283] raw: 0100000000000200 ffff8880087a0c80 ffffea0000387a00 dead000000000005 [ 61.547883] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d288301 [ 61.548481] page dumped because: kasan: bad access detected [ 61.548912] [ 61.549056] Memory state around the buggy address: [ 61.549444] ffff88800efab800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.550011] ffff88800efab880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.550720] >ffff88800efab900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.551599] ^ [ 61.552419] ffff88800efab980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 61.553311] ffff88800efaba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.554208] ================================================================== [ 61.555352] Disabling lock debugging due to kernel taint [ 63.649984] BUG: Bad rss-counter state mm:00000000482f3cf0 type:MM_FILEPAGES val:33 [ 63.651304] BUG: Bad rss-counter state mm:00000000482f3cf0 type:MM_ANONPAGES val:22 [ 64.177501] BUG: Bad rss-counter state mm:00000000ce992bdd type:MM_FILEPAGES val:33 [ 64.178745] BUG: Bad rss-counter state mm:00000000ce992bdd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42305' (ECDSA) to the list of known hosts. 2023/06/21 00:13:58 fuzzer started 2023/06/21 00:13:59 dialing manager at localhost:36067 2023/06/21 00:13:59 checking machine... 2023/06/21 00:13:59 checking revisions... [ 64.839838] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:13:59 testing simple program... [ 64.891879] cgroup: Unknown subsys name 'net' [ 64.992622] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:13:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce395c0 RCX=ffffffff81297433 RDX=1ffff1100d9c72e8 RSI=ffff88806ce395c0 RDI=0000000eea9349d5 RBP=ffff88806ce09f50 RSP=ffff88806ce09ea0 R8 =0000000eea9349d5 R9 =ffff88806ce396c0 R10=ffffffff85d3d357 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806ce39d38 R14=ffff88806ce39740 R15=ffff88806ce39500 RIP=ffffffff81294144 RFL=00000046 [---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 0000000000000000 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=00007fbfa8ae3a90 CR3=000000000d9c8000 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=1300638423f0b387434708e5a7d08633 XMM02=000000000011cff0d59e07bde36eea69 XMM03=000000000011d118ec2efd57dc4c00df XMM04=5738bb0f1dd8767500000000000ae988 XMM05=590ad1ae94ed00220000000000133c30 XMM06=18accdd5fd60674700000000001329d0 XMM07=fb795ef6d657705600000000001218b8 XMM08=2c67c8bc2e329bc3000000000011d118 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800bf5a080 RBX=ffff88800bf5a080 RCX=ffff88800bf5a000 RDX=0000000000000000 RSI=0000000000000130 RDI=ffffea00002fd680 RBP=0000000000000000 RSP=ffff888016c9fd10 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6a61 R12=ffff88800844f780 R13=ffffea0000369a80 R14=ffffffff81ef10be R15=ffff888019ad5cc0 RIP=ffffffff8180efab 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 00007fb951037900 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=00007fb9515ee618 CR3=000000000de78000 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=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