syzkaller login: [ 31.604296] BUG: Bad rss-counter state mm:00000000c9b1f300 type:MM_FILEPAGES val:33 [ 31.605586] BUG: Bad rss-counter state mm:00000000c9b1f300 type:MM_ANONPAGES val:22 [ 31.766056] ================================================================== [ 31.766975] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.767919] Read of size 8 at addr ffff888019f7b140 by task sshd/219 [ 31.768689] [ 31.768909] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.769921] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.770906] Call Trace: [ 31.771224] [ 31.771509] dump_stack_lvl+0x91/0xf0 [ 31.771998] print_report+0xcc/0x620 [ 31.772490] ? __virt_addr_valid+0x102/0x340 [ 31.773046] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.773687] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.774303] kasan_report+0xbe/0xf0 [ 31.774778] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.775400] vma_interval_tree_remove+0xc75/0xec0 [ 31.776009] vma_prepare+0xc54/0x11a0 [ 31.776483] __split_vma+0x5af/0x950 [ 31.776954] ? __pfx___split_vma+0x10/0x10 [ 31.777486] ? find_held_lock+0x2c/0x110 [ 31.778004] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.778573] ? lock_is_held_type+0x9f/0x120 [ 31.779110] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.779723] ? mtree_range_walk+0x632/0x900 [ 31.780273] ? mas_walk+0x5c7/0x7c0 [ 31.780746] do_vmi_munmap+0x1f1/0x2b0 [ 31.781238] mmap_region+0x1f9/0x2660 [ 31.781726] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.782237] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.782942] ? __pfx_lock_acquire+0x10/0x10 [ 31.783467] ? __pfx_mmap_region+0x10/0x10 [ 31.783991] ? security_mmap_addr+0x7d/0xa0 [ 31.784524] ? get_unmapped_area+0x1f5/0x3f0 [ 31.785073] do_mmap+0x854/0xf00 [ 31.785532] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.786027] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.786593] ksys_mmap_pgoff+0x3af/0x500 [ 31.787100] do_syscall_64+0x3f/0x90 [ 31.787587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.788240] RIP: 0033:0x7fa29b78ed82 [ 31.788698] 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 [ 31.790832] RSP: 002b:00007ffe83054ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.791750] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa29b78ed82 [ 31.792600] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa29abc8000 [ 31.793456] RBP: 00007fa29abc8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.794308] R10: 0000000000000812 R11: 0000000000000206 R12: 000056106dbdf980 [ 31.795155] R13: 00007ffe83054f00 R14: 00007ffe83054f30 R15: 00007ffe83055290 [ 31.796004] [ 31.796293] [ 31.796506] Allocated by task 212: [ 31.796941] kasan_save_stack+0x22/0x50 [ 31.797448] kasan_set_track+0x25/0x30 [ 31.797936] __kasan_slab_alloc+0x59/0x70 [ 31.798461] kmem_cache_alloc+0x16b/0x370 [ 31.798976] vm_area_dup+0x20/0x160 [ 31.799428] __split_vma+0x170/0x950 [ 31.799894] split_vma+0xc6/0x110 [ 31.800335] mprotect_fixup+0x8d2/0xb30 [ 31.800838] do_mprotect_pkey+0x87e/0xd40 [ 31.801378] __x64_sys_mprotect+0x78/0xc0 [ 31.801898] do_syscall_64+0x3f/0x90 [ 31.802372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.803011] [ 31.803232] Freed by task 10: [ 31.803616] kasan_save_stack+0x22/0x50 [ 31.804116] kasan_set_track+0x25/0x30 [ 31.804607] kasan_save_free_info+0x2b/0x50 [ 31.805140] __kasan_slab_free+0x10a/0x190 [ 31.805688] kmem_cache_free+0x10d/0x4d0 [ 31.806197] rcu_core+0x8c8/0x2860 [ 31.806644] __do_softirq+0x1b7/0x7d4 [ 31.807120] [ 31.807340] Last potentially related work creation: [ 31.807925] kasan_save_stack+0x22/0x50 [ 31.808426] __kasan_record_aux_stack+0x8e/0xa0 [ 31.809001] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.809659] remove_vma+0x139/0x170 [ 31.810114] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.810741] do_vmi_munmap+0x1f1/0x2b0 [ 31.811230] __vm_munmap+0x138/0x3a0 [ 31.811700] __x64_sys_munmap+0x59/0x80 [ 31.812199] do_syscall_64+0x3f/0x90 [ 31.812677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.813341] [ 31.813562] The buggy address belongs to the object at ffff888019f7b0e8 [ 31.813562] which belongs to the cache vm_area_struct of size 168 [ 31.815036] The buggy address is located 88 bytes inside of [ 31.815036] freed 168-byte region [ffff888019f7b0e8, ffff888019f7b190) [ 31.816456] [ 31.816675] The buggy address belongs to the physical page: [ 31.817372] page:000000000fb20bab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f7b [ 31.818498] memcg:ffff88801a034501 [ 31.818940] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.819608] page_type: 0xffffffff() [ 31.820057] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.820973] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a034501 [ 31.821909] page dumped because: kasan: bad access detected [ 31.822586] [ 31.822809] Memory state around the buggy address: [ 31.823404] ffff888019f7b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.824264] ffff888019f7b080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.825127] >ffff888019f7b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.825987] ^ [ 31.826624] ffff888019f7b180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.827476] ffff888019f7b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.828317] ================================================================== [ 31.829272] Disabling lock debugging due to kernel taint [ 33.862595] BUG: Bad rss-counter state mm:0000000081a325f8 type:MM_FILEPAGES val:33 [ 33.863833] BUG: Bad rss-counter state mm:0000000081a325f8 type:MM_ANONPAGES val:22 [ 34.279507] BUG: Bad rss-counter state mm:00000000b54ca798 type:MM_FILEPAGES val:33 [ 34.280476] BUG: Bad rss-counter state mm:00000000b54ca798 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64553' (ECDSA) to the list of known hosts. 2023/06/20 23:32:56 fuzzer started 2023/06/20 23:32:56 dialing manager at localhost:36067 2023/06/20 23:32:56 checking machine... 2023/06/20 23:32:56 checking revisions... [ 34.990915] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:32:57 testing simple program... [ 35.028575] cgroup: Unknown subsys name 'net' [ 35.085817] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:32:56 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=ffff888008c04000 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=00007fff89538fd8 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=00007fd0df07851000005646f32ec790 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=000000000008a835 RBX=0000000000000001 RCX=ffffffff83635bd6 RDX=000000000008a836 RSI=000000000002635b RDI=000000000019f89f RBP=ffff888018dbf5d8 RSP=ffff888018dbf510 R8 =ffffffff863b2e46 R9 =ffff888018dbf5c0 R10=0000000000038001 R11=000000000008a835 R12=ffff888018dbf5e0 R13=ffff888018dbf5c8 R14=ffff888018dbf5c1 R15=ffff888018dbf580 RIP=ffffffff81130853 RFL=00000293 [--S-A-C] 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 00007f52ab0d7900 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=00007f52ab68e618 CR3=000000001ca62000 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