syzkaller login: [ 35.314684] BUG: Bad rss-counter state mm:00000000f9fa26e4 type:MM_FILEPAGES val:33 [ 35.316114] BUG: Bad rss-counter state mm:00000000f9fa26e4 type:MM_ANONPAGES val:22 [ 35.480923] ================================================================== [ 35.481884] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.482817] Read of size 8 at addr ffff8880141cf228 by task sshd/220 [ 35.483699] [ 35.483913] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.484793] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.485785] Call Trace: [ 35.486111] [ 35.486396] dump_stack_lvl+0x91/0xf0 [ 35.486885] print_report+0xcc/0x620 [ 35.487366] ? __virt_addr_valid+0x102/0x340 [ 35.487919] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.488533] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.489166] kasan_report+0xbe/0xf0 [ 35.489644] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.490268] vma_interval_tree_remove+0xc75/0xec0 [ 35.490868] vma_prepare+0xc54/0x11a0 [ 35.491351] __split_vma+0x5af/0x950 [ 35.491832] ? __pfx___split_vma+0x10/0x10 [ 35.492366] ? find_held_lock+0x2c/0x110 [ 35.492922] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.493491] ? lock_is_held_type+0x9f/0x120 [ 35.494042] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.494656] ? mtree_range_walk+0x632/0x900 [ 35.495211] ? mas_walk+0x5c7/0x7c0 [ 35.495694] do_vmi_munmap+0x1f1/0x2b0 [ 35.496190] mmap_region+0x1f9/0x2660 [ 35.496677] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.497206] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.497920] ? __pfx_lock_acquire+0x10/0x10 [ 35.498461] ? __pfx_mmap_region+0x10/0x10 [ 35.498986] ? security_mmap_addr+0x7d/0xa0 [ 35.499512] ? get_unmapped_area+0x1f5/0x3f0 [ 35.500065] do_mmap+0x854/0xf00 [ 35.500510] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.501026] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.501586] ksys_mmap_pgoff+0x3af/0x500 [ 35.502097] do_syscall_64+0x3f/0x90 [ 35.502583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.503253] RIP: 0033:0x7ff78f643d82 [ 35.503715] 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 [ 35.505846] RSP: 002b:00007ffd7bd3db08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.506758] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff78f643d82 [ 35.507608] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff78ea7d000 [ 35.508455] RBP: 00007ff78ea7d000 R08: 0000000000000009 R09: 0000000000001000 [ 35.509321] R10: 0000000000000812 R11: 0000000000000206 R12: 00005559daf7aec0 [ 35.510188] R13: 00007ffd7bd3db20 R14: 00007ffd7bd3db50 R15: 00007ffd7bd3deb0 [ 35.511060] [ 35.511355] [ 35.511575] Allocated by task 213: [ 35.512006] kasan_save_stack+0x22/0x50 [ 35.512519] kasan_set_track+0x25/0x30 [ 35.513029] __kasan_slab_alloc+0x59/0x70 [ 35.513562] kmem_cache_alloc+0x16b/0x370 [ 35.514081] vm_area_dup+0x20/0x160 [ 35.514543] __split_vma+0x170/0x950 [ 35.515008] split_vma+0xc6/0x110 [ 35.515468] mprotect_fixup+0x8d2/0xb30 [ 35.515972] do_mprotect_pkey+0x87e/0xd40 [ 35.516491] __x64_sys_mprotect+0x78/0xc0 [ 35.517021] do_syscall_64+0x3f/0x90 [ 35.517499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.518137] [ 35.518350] Freed by task 19: [ 35.518734] kasan_save_stack+0x22/0x50 [ 35.519238] kasan_set_track+0x25/0x30 [ 35.519731] kasan_save_free_info+0x2b/0x50 [ 35.520271] __kasan_slab_free+0x10a/0x190 [ 35.520822] kmem_cache_free+0x10d/0x4d0 [ 35.521331] rcu_core+0x8c8/0x2860 [ 35.521773] __do_softirq+0x1b7/0x7d4 [ 35.522252] [ 35.522470] Last potentially related work creation: [ 35.523054] kasan_save_stack+0x22/0x50 [ 35.523557] __kasan_record_aux_stack+0x8e/0xa0 [ 35.524128] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.524775] remove_vma+0x139/0x170 [ 35.525230] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.525790] do_vmi_munmap+0x1f1/0x2b0 [ 35.526275] __vm_munmap+0x138/0x3a0 [ 35.526752] __x64_sys_munmap+0x59/0x80 [ 35.527252] do_syscall_64+0x3f/0x90 [ 35.527725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.528374] [ 35.528595] The buggy address belongs to the object at ffff8880141cf1d0 [ 35.528595] which belongs to the cache vm_area_struct of size 168 [ 35.530073] The buggy address is located 88 bytes inside of [ 35.530073] freed 168-byte region [ffff8880141cf1d0, ffff8880141cf278) [ 35.531474] [ 35.531695] The buggy address belongs to the physical page: [ 35.532352] page:0000000044b83001 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x141cf [ 35.533463] memcg:ffff88801034e301 [ 35.533889] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.534546] page_type: 0xffffffff() [ 35.534999] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.535926] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801034e301 [ 35.536861] page dumped because: kasan: bad access detected [ 35.537529] [ 35.537749] Memory state around the buggy address: [ 35.538328] ffff8880141cf100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.539183] ffff8880141cf180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.540034] >ffff8880141cf200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.540895] ^ [ 35.541450] ffff8880141cf280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.542312] ffff8880141cf300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.543161] ================================================================== [ 35.544175] Disabling lock debugging due to kernel taint [ 37.244544] BUG: Bad rss-counter state mm:00000000d54fc385 type:MM_FILEPAGES val:33 [ 37.245571] BUG: Bad rss-counter state mm:00000000d54fc385 type:MM_ANONPAGES val:22 [ 37.736426] BUG: Bad rss-counter state mm:00000000f70c24b6 type:MM_FILEPAGES val:33 [ 37.737454] BUG: Bad rss-counter state mm:00000000f70c24b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49485' (ECDSA) to the list of known hosts. 2023/06/19 13:56:35 fuzzer started 2023/06/19 13:56:35 dialing manager at localhost:44161 2023/06/19 13:56:35 checking machine... 2023/06/19 13:56:35 checking revisions... [ 38.440703] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:56:36 testing simple program... [ 38.491887] cgroup: Unknown subsys name 'net' [ 38.539944] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:56:31 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fcb5b8858c0 CR3=00000000102f8000 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=2035333a36353a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a36353a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffb334ca8 RBX=ffffffff85d88414 RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff86088c1a RDI=ffffffff85d88408 RBP=ffffffff85d88408 RSP=ffff88800f6ff828 R8 =ffffffff86088c1a R9 =ffff88800f6ff970 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d88420 R13=ffffffff85d88408 R14=ffffffff85d88408 R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007f671f39c900 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=00007f671f953618 CR3=0000000018e9c000 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