syzkaller login: [ 31.249092] BUG: Bad rss-counter state mm:000000003a933e3b type:MM_FILEPAGES val:33 [ 31.249634] BUG: Bad rss-counter state mm:000000003a933e3b type:MM_ANONPAGES val:22 [ 31.412140] ================================================================== [ 31.413236] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.414371] Read of size 8 at addr ffff88800e5a95c8 by task sshd/221 [ 31.415288] [ 31.415509] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.416377] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.417353] Call Trace: [ 31.417675] <TASK> [ 31.417963] dump_stack_lvl+0x91/0xf0 [ 31.418460] print_report+0xcc/0x620 [ 31.418954] ? __virt_addr_valid+0x102/0x340 [ 31.419515] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.420135] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.420759] kasan_report+0xbe/0xf0 [ 31.421242] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.421870] vma_interval_tree_remove+0xc75/0xec0 [ 31.422481] vma_prepare+0xc54/0x11a0 [ 31.422982] __split_vma+0x5af/0x950 [ 31.423457] ? __pfx___split_vma+0x10/0x10 [ 31.423990] ? find_held_lock+0x2c/0x110 [ 31.424514] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.425081] ? lock_is_held_type+0x9f/0x120 [ 31.425631] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.426243] ? mtree_range_walk+0x632/0x900 [ 31.426803] ? mas_walk+0x5c7/0x7c0 [ 31.427293] do_vmi_munmap+0x1f1/0x2b0 [ 31.427790] mmap_region+0x1f9/0x2660 [ 31.428280] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.428797] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.429514] ? __pfx_lock_acquire+0x10/0x10 [ 31.430052] ? __pfx_mmap_region+0x10/0x10 [ 31.430591] ? security_mmap_addr+0x7d/0xa0 [ 31.431154] ? get_unmapped_area+0x1f5/0x3f0 [ 31.431714] do_mmap+0x854/0xf00 [ 31.432157] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.432651] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.433225] ksys_mmap_pgoff+0x3af/0x500 [ 31.433738] do_syscall_64+0x3f/0x90 [ 31.434224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.434884] RIP: 0033:0x7fb6e4ccfd82 [ 31.435347] 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 [ 31.437501] RSP: 002b:00007ffc82b0ff78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.438418] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb6e4ccfd82 [ 31.439272] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb6e4109000 [ 31.440127] RBP: 00007fb6e4109000 R08: 0000000000000009 R09: 0000000000001000 [ 31.440990] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a38f3cbec0 [ 31.441847] R13: 00007ffc82b0ff90 R14: 00007ffc82b0ffc0 R15: 00007ffc82b10320 [ 31.442715] </TASK> [ 31.443024] [ 31.443245] Allocated by task 214: [ 31.443674] kasan_save_stack+0x22/0x50 [ 31.444184] kasan_set_track+0x25/0x30 [ 31.444681] __kasan_slab_alloc+0x59/0x70 [ 31.445211] kmem_cache_alloc+0x16b/0x370 [ 31.445734] vm_area_dup+0x20/0x160 [ 31.446195] __split_vma+0x170/0x950 [ 31.446668] split_vma+0xc6/0x110 [ 31.447150] mprotect_fixup+0x8d2/0xb30 [ 31.447682] do_mprotect_pkey+0x87e/0xd40 [ 31.448233] __x64_sys_mprotect+0x78/0xc0 [ 31.448788] do_syscall_64+0x3f/0x90 [ 31.449293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.449986] [ 31.450216] Freed by task 214: [ 31.450629] kasan_save_stack+0x22/0x50 [ 31.451178] kasan_set_track+0x25/0x30 [ 31.451698] kasan_save_free_info+0x2b/0x50 [ 31.452262] __kasan_slab_free+0x10a/0x190 [ 31.452829] kmem_cache_free+0x10d/0x4d0 [ 31.453364] rcu_core+0x8c8/0x2860 [ 31.453835] __do_softirq+0x1b7/0x7d4 [ 31.454346] [ 31.454575] Last potentially related work creation: [ 31.455218] kasan_save_stack+0x22/0x50 [ 31.455755] __kasan_record_aux_stack+0x8e/0xa0 [ 31.456361] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.457044] remove_vma+0x139/0x170 [ 31.457518] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.458108] do_vmi_munmap+0x1f1/0x2b0 [ 31.458627] __vm_munmap+0x138/0x3a0 [ 31.459137] __x64_sys_munmap+0x59/0x80 [ 31.459662] do_syscall_64+0x3f/0x90 [ 31.460163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.460836] [ 31.461063] The buggy address belongs to the object at ffff88800e5a9570 [ 31.461063] which belongs to the cache vm_area_struct of size 168 [ 31.462641] The buggy address is located 88 bytes inside of [ 31.462641] freed 168-byte region [ffff88800e5a9570, ffff88800e5a9618) [ 31.464145] [ 31.464375] The buggy address belongs to the physical page: [ 31.465080] page:000000001e69705c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5a9 [ 31.466242] memcg:ffff888013f36401 [ 31.466696] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.467391] page_type: 0xffffffff() [ 31.467870] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.468844] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f36401 [ 31.469851] page dumped because: kasan: bad access detected [ 31.470560] [ 31.470792] Memory state around the buggy address: [ 31.471433] ffff88800e5a9480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.472347] ffff88800e5a9500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.473257] >ffff88800e5a9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.474156] ^ [ 31.474872] ffff88800e5a9600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.475797] ffff88800e5a9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.476705] ================================================================== [ 31.477740] Disabling lock debugging due to kernel taint [ 33.396253] BUG: Bad rss-counter state mm:00000000809c92b2 type:MM_FILEPAGES val:33 [ 33.397187] BUG: Bad rss-counter state mm:00000000809c92b2 type:MM_ANONPAGES val:22 [ 33.863108] BUG: Bad rss-counter state mm:00000000578c9861 type:MM_FILEPAGES val:33 [ 33.864763] BUG: Bad rss-counter state mm:00000000578c9861 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10418' (ECDSA) to the list of known hosts. 2023/06/20 18:25:12 fuzzer started 2023/06/20 18:25:13 dialing manager at localhost:36067 2023/06/20 18:25:13 checking machine... 2023/06/20 18:25:13 checking revisions... [ 34.642765] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:25:13 testing simple program... [ 34.695267] cgroup: Unknown subsys name 'net' [ 34.742993] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:25:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff860d8201 RDX=1ffff11001daef07 RSI=ffffffff8180c6a2 RDI=ffff88800ed778a8 RBP=ffff88800ed77878 RSP=ffff88800ed777d0 R8 =ffffffff860d825a R9 =ffff88800ed77820 R10=0000000000038001 R11=0000000000010b8d R12=ffff88800ed778a8 R13=0000000000000000 R14=ffff888019e93680 R15=0000000080110000 RIP=ffffffff813ad47f 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 00007f16f10e1900 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=00007f16f1696650 CR3=000000000c9da000 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=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 info registers vcpu 1 RAX=00007f86a0f35c64 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800d998001 RSI=ffff88800d997f58 RDI=ffff88800d997fd8 RBP=ffff88800d997a40 RSP=ffff88800d997978 R8 =ffffffff864bbb58 R9 =ffff88800d997a28 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88800d997a48 R13=ffff88800d997a30 R14=ffff88800d997f58 R15=ffff88800d9979e8 RIP=ffffffff811317b0 RFL=00000202 [-------] 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 00007f86a067c900 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=00007f869faa23d0 CR3=000000000951a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0e3ad11155007d1e00000000000ae988 XMM05=e3db8638a0aaecd00000000000133cb8 XMM06=c291bd5c70af25b90000000000132aa8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000