syzkaller login: [ 89.545617] BUG: Bad rss-counter state mm:00000000e109b620 type:MM_FILEPAGES val:33 [ 89.546829] BUG: Bad rss-counter state mm:00000000e109b620 type:MM_ANONPAGES val:22 [ 89.600017] ================================================================== [ 89.601140] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 89.602300] Read of size 8 at addr ffff88801676ba50 by task sshd/220 [ 89.603242] [ 89.603665] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 89.604928] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 89.606114] Call Trace: [ 89.606504] [ 89.606861] dump_stack_lvl+0x91/0xf0 [ 89.607469] print_report+0xcc/0x620 [ 89.608089] ? __virt_addr_valid+0x102/0x340 [ 89.608754] ? vma_interval_tree_remove+0xc75/0xec0 [ 89.609497] ? vma_interval_tree_remove+0xc75/0xec0 [ 89.610244] kasan_report+0xbe/0xf0 [ 89.610821] ? vma_interval_tree_remove+0xc75/0xec0 [ 89.611611] vma_interval_tree_remove+0xc75/0xec0 [ 89.612373] vma_prepare+0xc54/0x11a0 [ 89.612983] __split_vma+0x5af/0x950 [ 89.613554] ? __pfx___split_vma+0x10/0x10 [ 89.614190] ? find_held_lock+0x2c/0x110 [ 89.614821] do_vmi_align_munmap+0x2ba/0x11f0 [ 89.615507] ? lock_is_held_type+0x9f/0x120 [ 89.616202] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 89.616974] ? mtree_range_walk+0x632/0x900 [ 89.617651] ? mas_walk+0x5c7/0x7c0 [ 89.618223] do_vmi_munmap+0x1f1/0x2b0 [ 89.618819] mmap_region+0x1f9/0x2660 [ 89.619402] ? vm_mmap_pgoff+0x15c/0x3a0 [ 89.620062] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 89.620989] ? __pfx_lock_acquire+0x10/0x10 [ 89.621651] ? __pfx_mmap_region+0x10/0x10 [ 89.622302] ? security_mmap_addr+0x7d/0xa0 [ 89.622978] ? get_unmapped_area+0x1f5/0x3f0 [ 89.623651] do_mmap+0x854/0xf00 [ 89.624205] vm_mmap_pgoff+0x1a6/0x3a0 [ 89.624758] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 89.625295] ksys_mmap_pgoff+0x3af/0x500 [ 89.625772] do_syscall_64+0x3f/0x90 [ 89.626229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.626834] RIP: 0033:0x7f1acc917d82 [ 89.627285] 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 [ 89.629312] RSP: 002b:00007fff4dd6c3a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 89.630160] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1acc917d82 [ 89.630985] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1acbd51000 [ 89.631794] RBP: 00007f1acbd51000 R08: 0000000000000009 R09: 0000000000001000 [ 89.632637] R10: 0000000000000812 R11: 0000000000000206 R12: 00005561c228bec0 [ 89.633436] R13: 00007fff4dd6c3c0 R14: 00007fff4dd6c3f0 R15: 00007fff4dd6c750 [ 89.634255] [ 89.634543] [ 89.634750] Allocated by task 213: [ 89.635207] kasan_save_stack+0x22/0x50 [ 89.635694] kasan_set_track+0x25/0x30 [ 89.636208] __kasan_slab_alloc+0x59/0x70 [ 89.636732] kmem_cache_alloc+0x16b/0x370 [ 89.637245] vm_area_dup+0x20/0x160 [ 89.637696] __split_vma+0x170/0x950 [ 89.638150] split_vma+0xc6/0x110 [ 89.638578] mprotect_fixup+0x8d2/0xb30 [ 89.639101] do_mprotect_pkey+0x87e/0xd40 [ 89.639611] __x64_sys_mprotect+0x78/0xc0 [ 89.640152] do_syscall_64+0x3f/0x90 [ 89.640622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.641258] [ 89.641464] Freed by task 213: [ 89.641850] kasan_save_stack+0x22/0x50 [ 89.642343] kasan_set_track+0x25/0x30 [ 89.642829] kasan_save_free_info+0x2b/0x50 [ 89.643345] __kasan_slab_free+0x10a/0x190 [ 89.643871] kmem_cache_free+0x10d/0x4d0 [ 89.644377] rcu_core+0x8c8/0x2860 [ 89.644831] __do_softirq+0x1b7/0x7d4 [ 89.645311] [ 89.645518] Last potentially related work creation: [ 89.646083] kasan_save_stack+0x22/0x50 [ 89.646571] __kasan_record_aux_stack+0x8e/0xa0 [ 89.647137] __call_rcu_common.constprop.0+0x6a/0xb90 [ 89.647762] remove_vma+0x139/0x170 [ 89.648214] do_vmi_align_munmap+0xd4a/0x11f0 [ 89.648769] do_vmi_munmap+0x1f1/0x2b0 [ 89.649247] __vm_munmap+0x138/0x3a0 [ 89.649700] __x64_sys_munmap+0x59/0x80 [ 89.650186] do_syscall_64+0x3f/0x90 [ 89.650645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.651271] [ 89.651477] The buggy address belongs to the object at ffff88801676b9f8 [ 89.651477] which belongs to the cache vm_area_struct of size 168 [ 89.652902] The buggy address is located 88 bytes inside of [ 89.652902] freed 168-byte region [ffff88801676b9f8, ffff88801676baa0) [ 89.654255] [ 89.654467] The buggy address belongs to the physical page: [ 89.655096] page:00000000364c7595 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1676b [ 89.656151] memcg:ffff8880097e5e01 [ 89.656593] flags: 0x100000000000200(slab|node=0|zone=1) [ 89.657231] page_type: 0xffffffff() [ 89.657676] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 89.658579] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097e5e01 [ 89.659462] page dumped because: kasan: bad access detected [ 89.660109] [ 89.660315] Memory state around the buggy address: [ 89.660906] ffff88801676b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 89.661744] ffff88801676b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 89.662580] >ffff88801676ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 89.663407] ^ [ 89.664089] ffff88801676ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 89.664955] ffff88801676bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 89.665786] ================================================================== [ 89.666889] Disabling lock debugging due to kernel taint [ 91.721392] BUG: Bad rss-counter state mm:00000000f8e4c3fd type:MM_FILEPAGES val:33 [ 91.722649] BUG: Bad rss-counter state mm:00000000f8e4c3fd type:MM_ANONPAGES val:22 [ 92.227790] BUG: Bad rss-counter state mm:000000002dbf1682 type:MM_FILEPAGES val:33 [ 92.228960] BUG: Bad rss-counter state mm:000000002dbf1682 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11605' (ECDSA) to the list of known hosts. 2023/06/20 01:42:43 fuzzer started 2023/06/20 01:42:43 dialing manager at localhost:44161 2023/06/20 01:42:43 checking machine... 2023/06/20 01:42:43 checking revisions... [ 92.880252] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:42:43 testing simple program... [ 92.921312] cgroup: Unknown subsys name 'net' [ 92.963866] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:41:44 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=ffffffff8609fb01 RDX=1ffff1100d9c1382 RSI=ffffffff8450b05e RDI=ffff88806ce09b6c RBP=ffff88806ce09c10 RSP=ffff88806ce09a78 R8 =ffffffff8609fb08 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888009785a00 RIP=ffffffff813ad4f7 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 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=00007ffd0667ba58 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=00007fd184ff851000005626e64e7790 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=ffff888016eb8cb0 RCX=ffff888016eb8cb0 RDX=0000000080110003 RSI=ffff888016eb8cb0 RDI=ffff88800879fc80 RBP=ffff88801022f7f8 RSP=ffff88801022f760 R8 =0000000080110002 R9 =0000000000000000 R10=ffffea00005bae00 R11=000000000012000c R12=ffffea00005bae00 R13=ffff888016eb8bc8 R14=0000000080110002 R15=ffff88800879fc80 RIP=ffffffff818094f2 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc68f9ce900 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=00007fc68ee1dcf0 CR3=000000000c44e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2f01325e16340a0d00000000000ae988 XMM05=5cf22eea77b507a90000000000139f38 XMM06=4fda316b135da52b0000000000138d28 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000