syzkaller login: [ 30.063632] BUG: Bad rss-counter state mm:00000000e98b1bd6 type:MM_FILEPAGES val:33 [ 30.065081] BUG: Bad rss-counter state mm:00000000e98b1bd6 type:MM_ANONPAGES val:22 [ 30.217831] ================================================================== [ 30.218754] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.219700] Read of size 8 at addr ffff88800efdac20 by task sshd/220 [ 30.220491] [ 30.220712] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.221661] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.222650] Call Trace: [ 30.222964] [ 30.223245] dump_stack_lvl+0x91/0xf0 [ 30.223732] print_report+0xcc/0x620 [ 30.224232] ? __virt_addr_valid+0x102/0x340 [ 30.224796] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.225436] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.226067] kasan_report+0xbe/0xf0 [ 30.226578] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.227233] vma_interval_tree_remove+0xc75/0xec0 [ 30.227839] vma_prepare+0xc54/0x11a0 [ 30.228324] __split_vma+0x5af/0x950 [ 30.228795] ? __pfx___split_vma+0x10/0x10 [ 30.229328] ? find_held_lock+0x2c/0x110 [ 30.229850] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.230437] ? lock_is_held_type+0x9f/0x120 [ 30.230981] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.231591] ? mtree_range_walk+0x632/0x900 [ 30.232146] ? mas_walk+0x5c7/0x7c0 [ 30.232626] do_vmi_munmap+0x1f1/0x2b0 [ 30.233128] mmap_region+0x1f9/0x2660 [ 30.233612] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.234122] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.234856] ? __pfx_lock_acquire+0x10/0x10 [ 30.235387] ? __pfx_mmap_region+0x10/0x10 [ 30.235924] ? security_mmap_addr+0x7d/0xa0 [ 30.236459] ? get_unmapped_area+0x1f5/0x3f0 [ 30.237017] do_mmap+0x854/0xf00 [ 30.237461] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.237961] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.238540] ksys_mmap_pgoff+0x3af/0x500 [ 30.239050] do_syscall_64+0x3f/0x90 [ 30.239532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.240185] RIP: 0033:0x7fecc08f5d82 [ 30.240652] 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 [ 30.242801] RSP: 002b:00007ffe9c2f0e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.243713] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fecc08f5d82 [ 30.244567] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fecbfd2f000 [ 30.245417] RBP: 00007fecbfd2f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.246268] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c356e35ec0 [ 30.247136] R13: 00007ffe9c2f0e60 R14: 00007ffe9c2f0e90 R15: 00007ffe9c2f11f0 [ 30.247998] [ 30.248293] [ 30.248513] Allocated by task 213: [ 30.248935] kasan_save_stack+0x22/0x50 [ 30.249426] kasan_set_track+0x25/0x30 [ 30.249897] __kasan_slab_alloc+0x59/0x70 [ 30.250413] kmem_cache_alloc+0x16b/0x370 [ 30.250903] vm_area_dup+0x20/0x160 [ 30.251333] __split_vma+0x170/0x950 [ 30.251775] split_vma+0xc6/0x110 [ 30.252191] mprotect_fixup+0x8d2/0xb30 [ 30.252668] do_mprotect_pkey+0x87e/0xd40 [ 30.253160] __x64_sys_mprotect+0x78/0xc0 [ 30.253653] do_syscall_64+0x3f/0x90 [ 30.254107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.254752] [ 30.254959] Freed by task 213: [ 30.255333] kasan_save_stack+0x22/0x50 [ 30.255810] kasan_set_track+0x25/0x30 [ 30.256275] kasan_save_free_info+0x2b/0x50 [ 30.256785] __kasan_slab_free+0x10a/0x190 [ 30.257297] kmem_cache_free+0x10d/0x4d0 [ 30.257779] rcu_core+0x8c8/0x2860 [ 30.258196] __do_softirq+0x1b7/0x7d4 [ 30.258657] [ 30.258861] Last potentially related work creation: [ 30.259407] kasan_save_stack+0x22/0x50 [ 30.259906] __kasan_record_aux_stack+0x8e/0xa0 [ 30.260489] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.261135] remove_vma+0x139/0x170 [ 30.261586] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.262156] do_vmi_munmap+0x1f1/0x2b0 [ 30.262679] __vm_munmap+0x138/0x3a0 [ 30.263149] __x64_sys_munmap+0x59/0x80 [ 30.263634] do_syscall_64+0x3f/0x90 [ 30.264102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.264731] [ 30.264945] The buggy address belongs to the object at ffff88800efdabc8 [ 30.264945] which belongs to the cache vm_area_struct of size 168 [ 30.266396] The buggy address is located 88 bytes inside of [ 30.266396] freed 168-byte region [ffff88800efdabc8, ffff88800efdac70) [ 30.267778] [ 30.267994] The buggy address belongs to the physical page: [ 30.268643] page:000000005da614d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefda [ 30.269710] memcg:ffff88800efd9101 [ 30.270134] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.270783] page_type: 0xffffffff() [ 30.271233] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.272158] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efd9101 [ 30.273057] page dumped because: kasan: bad access detected [ 30.273701] [ 30.273913] Memory state around the buggy address: [ 30.274501] ffff88800efdab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.275317] ffff88800efdab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.276191] >ffff88800efdac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.277068] ^ [ 30.277625] ffff88800efdac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.278512] ffff88800efdad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.279399] ================================================================== [ 30.280750] Disabling lock debugging due to kernel taint [ 32.305586] BUG: Bad rss-counter state mm:000000001ee971bf type:MM_FILEPAGES val:33 [ 32.306624] BUG: Bad rss-counter state mm:000000001ee971bf type:MM_ANONPAGES val:22 [ 32.797569] BUG: Bad rss-counter state mm:0000000073b461d3 type:MM_FILEPAGES val:33 [ 32.798487] BUG: Bad rss-counter state mm:0000000073b461d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54478' (ECDSA) to the list of known hosts. 2023/06/20 11:17:33 fuzzer started 2023/06/20 11:17:33 dialing manager at localhost:36067 2023/06/20 11:17:33 checking machine... 2023/06/20 11:17:33 checking revisions... [ 33.538285] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:17:33 testing simple program... [ 33.581150] cgroup: Unknown subsys name 'net' [ 33.639843] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:17:33 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=00007fb7eaacc8c0 CR3=000000000c774000 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=3edb80c399f0a69cce419154ef7c137c XMM02=000000000011a470eff9b2d0a8fce9cb XMM03=000000000011a5402c67c8bc2e329bc3 XMM04=5408a987d3ba5c1700000000000ae988 XMM05=cc953908cae4ef8b0000000000132630 XMM06=4fda316b135da52b00000000001316d0 XMM07=e042d86d42eb936e0000000000121ca0 XMM08=4d1ef0f2ac2d471d000000000011a540 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e1359 RSI=ffffffff8450cc7f RDI=ffff88806cf09b38 RBP=ffff88806cf09b08 RSP=ffff88806cf09a68 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000008abe0 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff8880162fb680 R15=ffff88800d0cc228 RIP=ffffffff813ad47e 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 00007fc22ac62900 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=00007ffeef7b6000 CR3=000000000e182000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000