syzkaller login: [ 127.258085] BUG: Bad rss-counter state mm:00000000aec4e0c7 type:MM_FILEPAGES val:33 [ 127.259188] BUG: Bad rss-counter state mm:00000000aec4e0c7 type:MM_ANONPAGES val:22 [ 127.427280] ================================================================== [ 127.428244] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 127.429337] Read of size 8 at addr ffff88800988ced8 by task sshd/219 [ 127.430097] [ 127.430325] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 127.431384] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 127.432355] Call Trace: [ 127.432676] [ 127.432966] dump_stack_lvl+0x91/0xf0 [ 127.433463] print_report+0xcc/0x620 [ 127.433947] ? __virt_addr_valid+0x102/0x340 [ 127.434510] ? vma_interval_tree_remove+0xc75/0xec0 [ 127.435147] ? vma_interval_tree_remove+0xc75/0xec0 [ 127.435778] kasan_report+0xbe/0xf0 [ 127.436252] ? vma_interval_tree_remove+0xc75/0xec0 [ 127.436866] vma_interval_tree_remove+0xc75/0xec0 [ 127.437484] vma_prepare+0xc54/0x11a0 [ 127.437967] __split_vma+0x5af/0x950 [ 127.438440] ? __pfx___split_vma+0x10/0x10 [ 127.439003] ? find_held_lock+0x2c/0x110 [ 127.439523] do_vmi_align_munmap+0x2ba/0x11f0 [ 127.440096] ? lock_is_held_type+0x9f/0x120 [ 127.440645] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 127.441256] ? mtree_range_walk+0x632/0x900 [ 127.441806] ? mas_walk+0x5c7/0x7c0 [ 127.442284] do_vmi_munmap+0x1f1/0x2b0 [ 127.442780] mmap_region+0x1f9/0x2660 [ 127.443272] ? vm_mmap_pgoff+0x15c/0x3a0 [ 127.443781] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 127.444497] ? __pfx_lock_acquire+0x10/0x10 [ 127.445031] ? __pfx_mmap_region+0x10/0x10 [ 127.445563] ? security_mmap_addr+0x7d/0xa0 [ 127.446096] ? get_unmapped_area+0x1f5/0x3f0 [ 127.446645] do_mmap+0x854/0xf00 [ 127.447096] vm_mmap_pgoff+0x1a6/0x3a0 [ 127.447596] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 127.448159] ksys_mmap_pgoff+0x3af/0x500 [ 127.448663] do_syscall_64+0x3f/0x90 [ 127.449134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 127.449780] RIP: 0033:0x7f13267a0d82 [ 127.450237] 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 [ 127.452368] RSP: 002b:00007ffd1e294268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 127.453274] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f13267a0d82 [ 127.454121] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1325bda000 [ 127.454980] RBP: 00007f1325bda000 R08: 0000000000000009 R09: 0000000000001000 [ 127.455828] R10: 0000000000000812 R11: 0000000000000206 R12: 000056245294df60 [ 127.456763] R13: 00007ffd1e294280 R14: 00007ffd1e2942b0 R15: 00007ffd1e294610 [ 127.457654] [ 127.457956] [ 127.458176] Allocated by task 211: [ 127.458625] kasan_save_stack+0x22/0x50 [ 127.459168] kasan_set_track+0x25/0x30 [ 127.459683] __kasan_slab_alloc+0x59/0x70 [ 127.460232] kmem_cache_alloc+0x16b/0x370 [ 127.460775] vm_area_dup+0x20/0x160 [ 127.461248] __split_vma+0x170/0x950 [ 127.461727] split_vma+0xc6/0x110 [ 127.462186] mprotect_fixup+0x8d2/0xb30 [ 127.462705] do_mprotect_pkey+0x87e/0xd40 [ 127.463258] __x64_sys_mprotect+0x78/0xc0 [ 127.463803] do_syscall_64+0x3f/0x90 [ 127.464298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 127.464970] [ 127.465193] Freed by task 211: [ 127.465601] kasan_save_stack+0x22/0x50 [ 127.466135] kasan_set_track+0x25/0x30 [ 127.466654] kasan_save_free_info+0x2b/0x50 [ 127.467225] __kasan_slab_free+0x10a/0x190 [ 127.467783] kmem_cache_free+0x10d/0x4d0 [ 127.468310] rcu_core+0x8c8/0x2860 [ 127.468778] __do_softirq+0x1b7/0x7d4 [ 127.469275] [ 127.469499] Last potentially related work creation: [ 127.470112] kasan_save_stack+0x22/0x50 [ 127.470635] __kasan_record_aux_stack+0x8e/0xa0 [ 127.471247] __call_rcu_common.constprop.0+0x6a/0xb90 [ 127.471917] remove_vma+0x139/0x170 [ 127.472386] do_vmi_align_munmap+0xd4a/0x11f0 [ 127.472974] do_vmi_munmap+0x1f1/0x2b0 [ 127.473477] __vm_munmap+0x138/0x3a0 [ 127.473963] __x64_sys_munmap+0x59/0x80 [ 127.474486] do_syscall_64+0x3f/0x90 [ 127.475003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 127.475669] [ 127.475894] The buggy address belongs to the object at ffff88800988ce80 [ 127.475894] which belongs to the cache vm_area_struct of size 168 [ 127.477433] The buggy address is located 88 bytes inside of [ 127.477433] freed 168-byte region [ffff88800988ce80, ffff88800988cf28) [ 127.478922] [ 127.479145] The buggy address belongs to the physical page: [ 127.479837] page:0000000064dfaaa9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x988c [ 127.480964] memcg:ffff888009722401 [ 127.481411] flags: 0x100000000000200(slab|node=0|zone=1) [ 127.482090] page_type: 0xffffffff() [ 127.482561] raw: 0100000000000200 ffff88800879fc80 ffffea00003ad140 dead000000000004 [ 127.483537] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009722401 [ 127.484481] page dumped because: kasan: bad access detected [ 127.485174] [ 127.485409] Memory state around the buggy address: [ 127.486014] ffff88800988cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 127.486920] ffff88800988ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 127.487783] >ffff88800988ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 127.488656] ^ [ 127.489391] ffff88800988cf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 127.490247] ffff88800988cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 127.491119] ================================================================== [ 127.492427] Disabling lock debugging due to kernel taint [ 129.416610] BUG: Bad rss-counter state mm:00000000d036a4ff type:MM_FILEPAGES val:33 [ 129.418104] BUG: Bad rss-counter state mm:00000000d036a4ff type:MM_ANONPAGES val:22 [ 129.887117] BUG: Bad rss-counter state mm:00000000dab8f482 type:MM_FILEPAGES val:33 [ 129.888470] BUG: Bad rss-counter state mm:00000000dab8f482 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44787' (ECDSA) to the list of known hosts. 2023/06/20 01:40:06 fuzzer started 2023/06/20 01:40:06 dialing manager at localhost:44161 2023/06/20 01:40:06 checking machine... 2023/06/20 01:40:06 checking revisions... [ 130.631819] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:40:06 testing simple program... [ 130.670365] cgroup: Unknown subsys name 'net' [ 130.701204] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:38:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880146e5000 RCX=0000000000000000 RDX=ffff88800c509b40 RSI=ffffffff83653a92 RDI=ffff8880146e5000 RBP=ffff8880146e5000 RSP=ffff88801be87808 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00002d3a00002d3a R12=ffff888019d15640 R13=0000000000000000 R14=ffff8880146e5579 R15=ffff8880146e5600 RIP=ffffffff83653a97 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 00007f7d8d37f900 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=00007f7d8d936618 CR3=000000000e0fe000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fd98ae495a0 CR3=000000000d82e000 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=968ef64d4f8cf2a59f464a4bac6a5407 XMM02=0000000000127410eff9b2d0a8fce9cb XMM03=00000000001274e02c67c8bc2e329bc3 XMM04=32c051cd0a0813e000000000000ae988 XMM05=dfcdbad4f1609c37000000000013cdd0 XMM06=fff341532ee4225e000000000013bfa8 XMM07=e042d86d42eb936e000000000012d910 XMM08=ac036684fd45d38300000000001274e0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000