syzkaller login: [ 30.296664] BUG: Bad rss-counter state mm:0000000063ca6407 type:MM_FILEPAGES val:33 [ 30.297708] BUG: Bad rss-counter state mm:0000000063ca6407 type:MM_ANONPAGES val:22 [ 30.458386] ================================================================== [ 30.459336] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.460271] Read of size 8 at addr ffff88800e4c95c8 by task sshd/221 [ 30.461161] [ 30.461381] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.462244] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.463246] Call Trace: [ 30.463570] [ 30.463853] dump_stack_lvl+0x91/0xf0 [ 30.464341] print_report+0xcc/0x620 [ 30.464833] ? __virt_addr_valid+0x102/0x340 [ 30.465379] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.466003] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.466617] kasan_report+0xbe/0xf0 [ 30.467093] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.467722] vma_interval_tree_remove+0xc75/0xec0 [ 30.468314] vma_prepare+0xc54/0x11a0 [ 30.468802] __split_vma+0x5af/0x950 [ 30.469273] ? __pfx___split_vma+0x10/0x10 [ 30.469802] ? find_held_lock+0x2c/0x110 [ 30.470327] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.470888] ? lock_is_held_type+0x9f/0x120 [ 30.471447] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.472055] ? mtree_range_walk+0x632/0x900 [ 30.472609] ? mas_walk+0x5c7/0x7c0 [ 30.473080] do_vmi_munmap+0x1f1/0x2b0 [ 30.473571] mmap_region+0x1f9/0x2660 [ 30.474050] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.474560] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.475284] ? __pfx_lock_acquire+0x10/0x10 [ 30.475820] ? __pfx_mmap_region+0x10/0x10 [ 30.476353] ? security_mmap_addr+0x7d/0xa0 [ 30.476881] ? get_unmapped_area+0x1f5/0x3f0 [ 30.477440] do_mmap+0x854/0xf00 [ 30.477892] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.478377] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.478938] ksys_mmap_pgoff+0x3af/0x500 [ 30.479466] do_syscall_64+0x3f/0x90 [ 30.479942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.480597] RIP: 0033:0x7f5981585d82 [ 30.481055] 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 [ 30.483177] RSP: 002b:00007ffc82d54ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.484079] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5981585d82 [ 30.484918] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f59809bf000 [ 30.485759] RBP: 00007f59809bf000 R08: 0000000000000009 R09: 0000000000001000 [ 30.486594] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558aa61abec0 [ 30.487446] R13: 00007ffc82d54ae0 R14: 00007ffc82d54b10 R15: 00007ffc82d54e70 [ 30.488291] [ 30.488586] [ 30.488809] Allocated by task 214: [ 30.489236] kasan_save_stack+0x22/0x50 [ 30.489739] kasan_set_track+0x25/0x30 [ 30.490232] __kasan_slab_alloc+0x59/0x70 [ 30.490746] kmem_cache_alloc+0x16b/0x370 [ 30.491272] vm_area_dup+0x20/0x160 [ 30.491726] __split_vma+0x170/0x950 [ 30.492193] split_vma+0xc6/0x110 [ 30.492646] mprotect_fixup+0x8d2/0xb30 [ 30.493156] do_mprotect_pkey+0x87e/0xd40 [ 30.493686] __x64_sys_mprotect+0x78/0xc0 [ 30.494206] do_syscall_64+0x3f/0x90 [ 30.494680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.495354] [ 30.495578] Freed by task 214: [ 30.495988] kasan_save_stack+0x22/0x50 [ 30.496508] kasan_set_track+0x25/0x30 [ 30.497024] kasan_save_free_info+0x2b/0x50 [ 30.497585] __kasan_slab_free+0x10a/0x190 [ 30.498138] kmem_cache_free+0x10d/0x4d0 [ 30.498674] rcu_core+0x8c8/0x2860 [ 30.499158] __do_softirq+0x1b7/0x7d4 [ 30.499659] [ 30.499883] Last potentially related work creation: [ 30.500485] kasan_save_stack+0x22/0x50 [ 30.500983] __kasan_record_aux_stack+0x8e/0xa0 [ 30.501554] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.502189] remove_vma+0x139/0x170 [ 30.502645] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.503203] do_vmi_munmap+0x1f1/0x2b0 [ 30.503693] __vm_munmap+0x138/0x3a0 [ 30.504163] __x64_sys_munmap+0x59/0x80 [ 30.504672] do_syscall_64+0x3f/0x90 [ 30.505149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.505797] [ 30.506016] The buggy address belongs to the object at ffff88800e4c9570 [ 30.506016] which belongs to the cache vm_area_struct of size 168 [ 30.507498] The buggy address is located 88 bytes inside of [ 30.507498] freed 168-byte region [ffff88800e4c9570, ffff88800e4c9618) [ 30.508898] [ 30.509117] The buggy address belongs to the physical page: [ 30.509777] page:0000000015692f1c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4c9 [ 30.510864] memcg:ffff88800ec71301 [ 30.511312] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.512010] page_type: 0xffffffff() [ 30.512465] raw: 0100000000000200 ffff8880087a0c80 ffffea0000381a00 000000000000000d [ 30.513366] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec71301 [ 30.514267] page dumped because: kasan: bad access detected [ 30.514917] [ 30.515137] Memory state around the buggy address: [ 30.515707] ffff88800e4c9480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.516565] ffff88800e4c9500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.517411] >ffff88800e4c9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.518272] ^ [ 30.518931] ffff88800e4c9600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.519811] ffff88800e4c9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.520648] ================================================================== [ 30.521650] Disabling lock debugging due to kernel taint [ 32.517938] BUG: Bad rss-counter state mm:000000007b18e413 type:MM_FILEPAGES val:33 [ 32.518922] BUG: Bad rss-counter state mm:000000007b18e413 type:MM_ANONPAGES val:22 [ 33.066257] BUG: Bad rss-counter state mm:00000000baca4e16 type:MM_FILEPAGES val:33 [ 33.067460] BUG: Bad rss-counter state mm:00000000baca4e16 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49981' (ECDSA) to the list of known hosts. 2023/06/20 23:34:58 fuzzer started 2023/06/20 23:34:59 dialing manager at localhost:36067 2023/06/20 23:34:59 checking machine... 2023/06/20 23:34:59 checking revisions... [ 33.685561] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:34:59 testing simple program... [ 33.732447] cgroup: Unknown subsys name 'net' [ 33.794805] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:34:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81894a1b RDX=ffff888006ab0000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888016862658 RSP=ffff888006b37578 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000000000081 R14=ffffffff856f0da0 R15=ffff88801686265a RIP=ffffffff814c027c 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 00007f026fd5e900 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=00007ff7c7660650 CR3=000000000d650000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=d9af839349563d8500000000000ae988 XMM05=a6f1904621cb9ef80000000000132138 XMM06=c291bd5c70af25b90000000000130f28 XMM07=fb795ef6d657705600000000001211c0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110019f97db RBX=ffff88800cfcbea8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800cfcbeb8 RBP=ffff8880143d1dd0 RSP=ffff88800fbd7c98 R8 =0000000000000001 R9 =ffffed1001f7af87 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88801439bd60 R14=ffffffff818c73ee R15=ffff888016ff5980 RIP=ffffffff818464b7 RFL=00000002 [-------] 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 00007ff7c70ab900 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=00007ff7c7662618 CR3=0000000016c24000 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