syzkaller login: [ 31.216467] BUG: Bad rss-counter state mm:00000000697da218 type:MM_FILEPAGES val:33 [ 31.217663] BUG: Bad rss-counter state mm:00000000697da218 type:MM_ANONPAGES val:22 [ 31.257461] ================================================================== [ 31.258845] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.259961] Read of size 8 at addr ffff88800da0ac20 by task sshd/220 [ 31.260756] [ 31.261007] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.261865] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.262865] Call Trace: [ 31.263190] [ 31.263480] dump_stack_lvl+0x91/0xf0 [ 31.263975] print_report+0xcc/0x620 [ 31.264482] ? __virt_addr_valid+0x102/0x340 [ 31.265080] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.265715] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.266460] kasan_report+0xbe/0xf0 [ 31.267044] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.267807] vma_interval_tree_remove+0xc75/0xec0 [ 31.268772] vma_prepare+0xc54/0x11a0 [ 31.269369] __split_vma+0x5af/0x950 [ 31.269951] ? __pfx___split_vma+0x10/0x10 [ 31.270597] ? find_held_lock+0x2c/0x110 [ 31.271236] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.271931] ? lock_is_held_type+0x9f/0x120 [ 31.272591] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.273372] ? mtree_range_walk+0x632/0x900 [ 31.274005] ? mas_walk+0x5c7/0x7c0 [ 31.274499] do_vmi_munmap+0x1f1/0x2b0 [ 31.275009] mmap_region+0x1f9/0x2660 [ 31.275513] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.276040] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.276773] ? __pfx_lock_acquire+0x10/0x10 [ 31.277338] ? __pfx_mmap_region+0x10/0x10 [ 31.277891] ? security_mmap_addr+0x7d/0xa0 [ 31.278437] ? get_unmapped_area+0x1f5/0x3f0 [ 31.279003] do_mmap+0x854/0xf00 [ 31.279451] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.279965] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.280545] ksys_mmap_pgoff+0x3af/0x500 [ 31.281082] do_syscall_64+0x3f/0x90 [ 31.281567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.282239] RIP: 0033:0x7fcafe4a5d82 [ 31.282712] 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 [ 31.284937] RSP: 002b:00007ffc7566eb08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.285895] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcafe4a5d82 [ 31.286772] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcafd8df000 [ 31.287614] RBP: 00007fcafd8df000 R08: 0000000000000009 R09: 0000000000001000 [ 31.288489] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d85d7c8b20 [ 31.289377] R13: 00007ffc7566eb20 R14: 00007ffc7566eb50 R15: 00007ffc7566eeb0 [ 31.290265] [ 31.290565] [ 31.290786] Allocated by task 213: [ 31.291232] kasan_save_stack+0x22/0x50 [ 31.291751] kasan_set_track+0x25/0x30 [ 31.292269] __kasan_slab_alloc+0x59/0x70 [ 31.292819] kmem_cache_alloc+0x16b/0x370 [ 31.293375] vm_area_dup+0x20/0x160 [ 31.293846] __split_vma+0x170/0x950 [ 31.294335] split_vma+0xc6/0x110 [ 31.294792] mprotect_fixup+0x8d2/0xb30 [ 31.295310] do_mprotect_pkey+0x87e/0xd40 [ 31.295842] __x64_sys_mprotect+0x78/0xc0 [ 31.296382] do_syscall_64+0x3f/0x90 [ 31.296993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.297886] [ 31.298185] Freed by task 213: [ 31.298754] kasan_save_stack+0x22/0x50 [ 31.299470] kasan_set_track+0x25/0x30 [ 31.300170] kasan_save_free_info+0x2b/0x50 [ 31.300963] __kasan_slab_free+0x10a/0x190 [ 31.301718] kmem_cache_free+0x10d/0x4d0 [ 31.302375] rcu_core+0x8c8/0x2860 [ 31.302970] __do_softirq+0x1b7/0x7d4 [ 31.303655] [ 31.303959] Last potentially related work creation: [ 31.304763] kasan_save_stack+0x22/0x50 [ 31.305374] __kasan_record_aux_stack+0x8e/0xa0 [ 31.306099] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.306812] remove_vma+0x139/0x170 [ 31.307302] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.307905] do_vmi_munmap+0x1f1/0x2b0 [ 31.308450] __vm_munmap+0x138/0x3a0 [ 31.308972] __x64_sys_munmap+0x59/0x80 [ 31.309570] do_syscall_64+0x3f/0x90 [ 31.310190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.310866] [ 31.311085] Second to last potentially related work creation: [ 31.311771] kasan_save_stack+0x22/0x50 [ 31.312276] __kasan_record_aux_stack+0x8e/0xa0 [ 31.312872] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.313522] remove_vma+0x139/0x170 [ 31.313977] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.314532] do_vmi_munmap+0x1f1/0x2b0 [ 31.315023] mmap_region+0x1f9/0x2660 [ 31.315500] do_mmap+0x854/0xf00 [ 31.315935] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.316428] ksys_mmap_pgoff+0x3af/0x500 [ 31.316934] do_syscall_64+0x3f/0x90 [ 31.317413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.318064] [ 31.318288] The buggy address belongs to the object at ffff88800da0abc8 [ 31.318288] which belongs to the cache vm_area_struct of size 168 [ 31.319757] The buggy address is located 88 bytes inside of [ 31.319757] freed 168-byte region [ffff88800da0abc8, ffff88800da0ac70) [ 31.321163] [ 31.321383] The buggy address belongs to the physical page: [ 31.322039] page:000000004f8d6ffd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda0a [ 31.323116] memcg:ffff88800e917301 [ 31.323541] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.324230] page_type: 0xffffffff() [ 31.324677] raw: 0100000000000200 ffff8880087a0c80 ffffea0000334f80 dead000000000005 [ 31.325618] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e917301 [ 31.326538] page dumped because: kasan: bad access detected [ 31.327207] [ 31.327425] Memory state around the buggy address: [ 31.328026] ffff88800da0ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.328899] ffff88800da0ab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.329759] >ffff88800da0ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.330614] ^ [ 31.331144] ffff88800da0ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.332017] ffff88800da0ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.332895] ================================================================== [ 31.333831] Disabling lock debugging due to kernel taint [ 33.332095] BUG: Bad rss-counter state mm:0000000074fc2467 type:MM_FILEPAGES val:33 [ 33.333148] BUG: Bad rss-counter state mm:0000000074fc2467 type:MM_ANONPAGES val:22 [ 33.917972] BUG: Bad rss-counter state mm:0000000029ee5bdc type:MM_FILEPAGES val:33 [ 33.919167] BUG: Bad rss-counter state mm:0000000029ee5bdc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61567' (ECDSA) to the list of known hosts. 2023/06/20 14:05:14 fuzzer started 2023/06/20 14:05:14 dialing manager at localhost:36067 2023/06/20 14:05:14 checking machine... 2023/06/20 14:05:14 checking revisions... [ 34.613888] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:05:14 testing simple program... [ 34.679253] cgroup: Unknown subsys name 'net' [ 34.755263] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:05:13 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffcde406e18 CR3=0000000005482000 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=00007fd5f5d55510000055e7ed3c8790 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 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888008df80d8 RCX=0000000000000000 RDX=ffff888016631b40 RSI=ffffffff81f35b21 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff88800f39f970 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=000000001371c348 R13=0000000000000001 R14=ffff88800f39fc38 R15=0000000000000000 RIP=ffffffff814c089b RFL=00000246 [---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 00007f1d9e2c4900 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=00007f1d9e879650 CR3=000000000ee8e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000