syzkaller login: [ 28.834682] BUG: Bad rss-counter state mm:00000000242db5af type:MM_FILEPAGES val:33 [ 28.835940] BUG: Bad rss-counter state mm:00000000242db5af type:MM_ANONPAGES val:22 [ 28.878042] ================================================================== [ 28.879118] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.880218] Read of size 8 at addr ffff888018c4ab38 by task sshd/220 [ 28.881091] [ 28.881375] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.882350] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.883561] Call Trace: [ 28.883966] [ 28.884261] dump_stack_lvl+0x91/0xf0 [ 28.884757] print_report+0xcc/0x620 [ 28.885313] ? __virt_addr_valid+0x102/0x340 [ 28.885959] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.886709] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.887422] kasan_report+0xbe/0xf0 [ 28.887935] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.888661] vma_interval_tree_remove+0xc75/0xec0 [ 28.889407] vma_prepare+0xc54/0x11a0 [ 28.889886] __split_vma+0x5af/0x950 [ 28.890355] ? __pfx___split_vma+0x10/0x10 [ 28.890890] ? find_held_lock+0x2c/0x110 [ 28.891424] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.892025] ? lock_is_held_type+0x9f/0x120 [ 28.892569] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.893179] ? mtree_range_walk+0x632/0x900 [ 28.893733] ? mas_walk+0x5c7/0x7c0 [ 28.894218] do_vmi_munmap+0x1f1/0x2b0 [ 28.894719] mmap_region+0x1f9/0x2660 [ 28.895220] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.895751] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.896484] ? __pfx_lock_acquire+0x10/0x10 [ 28.897015] ? __pfx_mmap_region+0x10/0x10 [ 28.897552] ? security_mmap_addr+0x7d/0xa0 [ 28.898086] ? get_unmapped_area+0x1f5/0x3f0 [ 28.898645] do_mmap+0x854/0xf00 [ 28.899088] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.899593] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.900158] ksys_mmap_pgoff+0x3af/0x500 [ 28.900675] do_syscall_64+0x3f/0x90 [ 28.901161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.901818] RIP: 0033:0x7f886e084d82 [ 28.902283] 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 [ 28.904438] RSP: 002b:00007fff63d7c3c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.905349] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f886e084d82 [ 28.906198] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f886d4be000 [ 28.907051] RBP: 00007f886d4be000 R08: 0000000000000009 R09: 0000000000001000 [ 28.907936] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a16ed09ec0 [ 28.908808] R13: 00007fff63d7c3e0 R14: 00007fff63d7c410 R15: 00007fff63d7c770 [ 28.909672] [ 28.909965] [ 28.910182] Allocated by task 213: [ 28.910629] kasan_save_stack+0x22/0x50 [ 28.911149] kasan_set_track+0x25/0x30 [ 28.911671] __kasan_slab_alloc+0x59/0x70 [ 28.912231] kmem_cache_alloc+0x16b/0x370 [ 28.912761] vm_area_dup+0x20/0x160 [ 28.913213] __split_vma+0x170/0x950 [ 28.913677] split_vma+0xc6/0x110 [ 28.914118] mprotect_fixup+0x8d2/0xb30 [ 28.914623] do_mprotect_pkey+0x87e/0xd40 [ 28.915142] __x64_sys_mprotect+0x78/0xc0 [ 28.915675] do_syscall_64+0x3f/0x90 [ 28.916154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.916836] [ 28.917053] Freed by task 213: [ 28.917446] kasan_save_stack+0x22/0x50 [ 28.917948] kasan_set_track+0x25/0x30 [ 28.918436] kasan_save_free_info+0x2b/0x50 [ 28.918982] __kasan_slab_free+0x10a/0x190 [ 28.919537] kmem_cache_free+0x10d/0x4d0 [ 28.920042] rcu_core+0x8c8/0x2860 [ 28.920485] __do_softirq+0x1b7/0x7d4 [ 28.920964] [ 28.921174] Last potentially related work creation: [ 28.921821] kasan_save_stack+0x22/0x50 [ 28.922325] __kasan_record_aux_stack+0x8e/0xa0 [ 28.922907] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.923567] remove_vma+0x139/0x170 [ 28.924021] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.924572] do_vmi_munmap+0x1f1/0x2b0 [ 28.925063] __vm_munmap+0x138/0x3a0 [ 28.925528] __x64_sys_munmap+0x59/0x80 [ 28.926023] do_syscall_64+0x3f/0x90 [ 28.926498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.927140] [ 28.927365] Second to last potentially related work creation: [ 28.928071] kasan_save_stack+0x22/0x50 [ 28.928587] __kasan_record_aux_stack+0x8e/0xa0 [ 28.929161] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.929812] remove_vma+0x139/0x170 [ 28.930262] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.930823] do_vmi_munmap+0x1f1/0x2b0 [ 28.931311] __vm_munmap+0x138/0x3a0 [ 28.931784] __x64_sys_munmap+0x59/0x80 [ 28.932287] do_syscall_64+0x3f/0x90 [ 28.932764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.933422] [ 28.933644] The buggy address belongs to the object at ffff888018c4aae0 [ 28.933644] which belongs to the cache vm_area_struct of size 168 [ 28.935106] The buggy address is located 88 bytes inside of [ 28.935106] freed 168-byte region [ffff888018c4aae0, ffff888018c4ab88) [ 28.936556] [ 28.936772] The buggy address belongs to the physical page: [ 28.937420] page:000000005674e147 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c4a [ 28.938500] memcg:ffff88801469c301 [ 28.938923] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.939576] page_type: 0xffffffff() [ 28.940028] raw: 0100000000000200 ffff8880087a0c80 ffffea00006313c0 dead000000000008 [ 28.940945] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801469c301 [ 28.941846] page dumped because: kasan: bad access detected [ 28.942504] [ 28.942720] Memory state around the buggy address: [ 28.943296] ffff888018c4aa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.944157] ffff888018c4aa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 28.945015] >ffff888018c4ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.945864] ^ [ 28.946469] ffff888018c4ab80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 28.947313] ffff888018c4ac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 28.948171] ================================================================== [ 28.949084] Disabling lock debugging due to kernel taint [ 30.850986] BUG: Bad rss-counter state mm:000000002bed9702 type:MM_FILEPAGES val:33 [ 30.851755] BUG: Bad rss-counter state mm:000000002bed9702 type:MM_ANONPAGES val:22 [ 31.316492] BUG: Bad rss-counter state mm:00000000eaf6329e type:MM_FILEPAGES val:33 [ 31.317658] BUG: Bad rss-counter state mm:00000000eaf6329e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13219' (ECDSA) to the list of known hosts. 2023/06/20 11:39:02 fuzzer started 2023/06/20 11:39:03 dialing manager at localhost:36067 2023/06/20 11:39:03 checking machine... 2023/06/20 11:39:03 checking revisions... [ 32.126831] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:39:03 testing simple program... [ 32.180750] cgroup: Unknown subsys name 'net' [ 32.225858] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:39:02 Registers: info registers vcpu 0 RAX=0000000000000020 RBX=000055c3a21d2360 RCX=00000000000001b8 RDX=0000000000000100 RSI=0000000000000000 RDI=000055c3a21d2620 RBP=000055c3a21d2620 RSP=00007ffc30318780 R8 =000000000000001f R9 =00007ffc3037f080 R10=00007ffc3037f0f0 R11=000000000000d110 R12=000055c3a21d2620 R13=000055c3a21d2360 R14=0000000000000100 R15=0000000000000000 RIP=00007efd014b725b 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 00007efd0093f900 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=00007efcffd71ac0 CR3=000000000f5c0000 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=eba2e2e163105fbbd04d285680eebac9 XMM02=eff9b2d0a8fce9cb0000000000119e88 XMM03=2c67c8bc2e329bc30000000000119fb0 XMM04=8a82a059ac3cb28200000000000ae988 XMM05=3871d73f4735a28a0000000000133488 XMM06=4fda316b135da52b0000000000132278 XMM07=fb795ef6d65770560000000000121488 XMM08=2c67c8bc2e329bc30000000000119fb0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000004ab011b RBX=ffff88800dc15810 RCX=ffff88800dc15000 RDX=0000000000000080 RSI=ffff88800dc15720 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88806cf09da0 R8 =0000000000000130 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6a61 R12=ffff88800844f780 R13=ffffea0000647400 R14=ffffffff818d9c06 R15=ffff88800dabf600 RIP=ffffffff8180eff0 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 00007f2c53ff3900 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=00007f2c545aa618 CR3=00000000195e0000 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=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