syzkaller login: [ 60.565125] BUG: Bad rss-counter state mm:000000003435e79a type:MM_FILEPAGES val:33 [ 60.566559] BUG: Bad rss-counter state mm:000000003435e79a type:MM_ANONPAGES val:22 [ 60.714659] ================================================================== [ 60.715726] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.716847] Read of size 8 at addr ffff88800e767880 by task sshd/220 [ 60.717731] [ 60.717964] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.718841] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.719833] Call Trace: [ 60.720158] <TASK> [ 60.720458] dump_stack_lvl+0x91/0xf0 [ 60.720963] print_report+0xcc/0x620 [ 60.721457] ? __virt_addr_valid+0x102/0x340 [ 60.722022] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.722648] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.723278] kasan_report+0xbe/0xf0 [ 60.723752] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.724392] vma_interval_tree_remove+0xc75/0xec0 [ 60.725023] vma_prepare+0xc54/0x11a0 [ 60.725506] __split_vma+0x5af/0x950 [ 60.725978] ? __pfx___split_vma+0x10/0x10 [ 60.726509] ? find_held_lock+0x2c/0x110 [ 60.727045] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.727615] ? lock_is_held_type+0x9f/0x120 [ 60.728163] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.728795] ? mtree_range_walk+0x632/0x900 [ 60.729350] ? mas_walk+0x5c7/0x7c0 [ 60.729837] do_vmi_munmap+0x1f1/0x2b0 [ 60.730334] mmap_region+0x1f9/0x2660 [ 60.730825] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.731347] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.732077] ? __pfx_lock_acquire+0x10/0x10 [ 60.732626] ? __pfx_mmap_region+0x10/0x10 [ 60.733173] ? security_mmap_addr+0x7d/0xa0 [ 60.733721] ? get_unmapped_area+0x1f5/0x3f0 [ 60.734283] do_mmap+0x854/0xf00 [ 60.734732] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.735229] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.735805] ksys_mmap_pgoff+0x3af/0x500 [ 60.736338] do_syscall_64+0x3f/0x90 [ 60.736821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.737466] RIP: 0033:0x7fbe2697ad82 [ 60.737922] 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 [ 60.740046] RSP: 002b:00007ffea6e8cee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.740979] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe2697ad82 [ 60.741846] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe25db4000 [ 60.742705] RBP: 00007fbe25db4000 R08: 0000000000000009 R09: 0000000000001000 [ 60.743572] R10: 0000000000000812 R11: 0000000000000206 R12: 000055983a2b3980 [ 60.744444] R13: 00007ffea6e8cf00 R14: 00007ffea6e8cf30 R15: 00007ffea6e8d290 [ 60.745313] </TASK> [ 60.745602] [ 60.745828] Allocated by task 213: [ 60.746271] kasan_save_stack+0x22/0x50 [ 60.746789] kasan_set_track+0x25/0x30 [ 60.747295] __kasan_slab_alloc+0x59/0x70 [ 60.747830] kmem_cache_alloc+0x16b/0x370 [ 60.748369] vm_area_dup+0x20/0x160 [ 60.748863] __split_vma+0x170/0x950 [ 60.749349] split_vma+0xc6/0x110 [ 60.749799] mprotect_fixup+0x8d2/0xb30 [ 60.750317] do_mprotect_pkey+0x87e/0xd40 [ 60.750839] __x64_sys_mprotect+0x78/0xc0 [ 60.751365] do_syscall_64+0x3f/0x90 [ 60.751839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.752499] [ 60.752717] Freed by task 213: [ 60.753106] kasan_save_stack+0x22/0x50 [ 60.753608] kasan_set_track+0x25/0x30 [ 60.754107] kasan_save_free_info+0x2b/0x50 [ 60.754651] __kasan_slab_free+0x10a/0x190 [ 60.755186] kmem_cache_free+0x10d/0x4d0 [ 60.755693] rcu_core+0x8c8/0x2860 [ 60.756155] __do_softirq+0x1b7/0x7d4 [ 60.756656] [ 60.756869] Last potentially related work creation: [ 60.757464] kasan_save_stack+0x22/0x50 [ 60.757973] __kasan_record_aux_stack+0x8e/0xa0 [ 60.758568] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.759217] remove_vma+0x139/0x170 [ 60.759674] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.760232] do_vmi_munmap+0x1f1/0x2b0 [ 60.760748] __vm_munmap+0x138/0x3a0 [ 60.761221] __x64_sys_munmap+0x59/0x80 [ 60.761729] do_syscall_64+0x3f/0x90 [ 60.762216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.762876] [ 60.763094] Second to last potentially related work creation: [ 60.763780] kasan_save_stack+0x22/0x50 [ 60.764293] __kasan_record_aux_stack+0x8e/0xa0 [ 60.764890] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.765535] remove_vma+0x139/0x170 [ 60.765991] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.766548] do_vmi_munmap+0x1f1/0x2b0 [ 60.767043] __vm_munmap+0x138/0x3a0 [ 60.767510] __x64_sys_munmap+0x59/0x80 [ 60.768021] do_syscall_64+0x3f/0x90 [ 60.768515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.769164] [ 60.769382] The buggy address belongs to the object at ffff88800e767828 [ 60.769382] which belongs to the cache vm_area_struct of size 168 [ 60.770866] The buggy address is located 88 bytes inside of [ 60.770866] freed 168-byte region [ffff88800e767828, ffff88800e7678d0) [ 60.772280] [ 60.772499] The buggy address belongs to the physical page: [ 60.773157] page:0000000099fee81a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe767 [ 60.774270] memcg:ffff88800d1ec401 [ 60.774702] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.775415] page_type: 0xffffffff() [ 60.775864] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 60.776801] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1ec401 [ 60.777721] page dumped because: kasan: bad access detected [ 60.778391] [ 60.778613] Memory state around the buggy address: [ 60.779204] ffff88800e767780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 60.780062] ffff88800e767800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 60.780954] >ffff88800e767880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 60.781818] ^ [ 60.782239] ffff88800e767900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.783104] ffff88800e767980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 60.783962] ================================================================== [ 60.784979] Disabling lock debugging due to kernel taint [ 62.710384] BUG: Bad rss-counter state mm:00000000b77c345b type:MM_FILEPAGES val:33 [ 62.711570] BUG: Bad rss-counter state mm:00000000b77c345b type:MM_ANONPAGES val:22 [ 63.126970] BUG: Bad rss-counter state mm:00000000afd8361b type:MM_FILEPAGES val:33 [ 63.128153] BUG: Bad rss-counter state mm:00000000afd8361b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37721' (ECDSA) to the list of known hosts. 2023/06/21 01:33:22 fuzzer started 2023/06/21 01:33:22 dialing manager at localhost:36067 2023/06/21 01:33:22 checking machine... 2023/06/21 01:33:22 checking revisions... [ 63.778003] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:33:22 testing simple program... [ 63.810720] cgroup: Unknown subsys name 'net' [ 63.855746] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:33:22 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffffffff856d84a0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d84a4 RBP=1ffff110033e1ef5 RSP=ffff888019f0f7a0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000246 R13=0000000000000000 R14=ffff88800c449d58 R15=ffff88800c449d10 RIP=ffffffff812e009a 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 00007f4d9d51c700 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=00007f6f2b4510b0 CR3=000000000c9b0000 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=2031323a33333a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a33333a3130203132 XMM08=3d656e696c646d632022656369767265 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=00007f082955dbf0 CR3=000000000d694000 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=0f5b9da43f2d6a8413472d8ddad2d8bb XMM02=000000000011b170eff9b2d0a8fce9cb XMM03=000000000011b2402c67c8bc2e329bc3 XMM04=eb4ba668d82af22c00000000000ae988 XMM05=19e9129bd510f2350000000000133040 XMM06=f1261843af6250ac0000000000131f90 XMM07=e042d86d42eb936e00000000001226d8 XMM08=b6e69a4ba9a3e093000000000011b240 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000