syzkaller login: [ 31.264189] BUG: Bad rss-counter state mm:0000000039fdad32 type:MM_FILEPAGES val:33 [ 31.265209] BUG: Bad rss-counter state mm:0000000039fdad32 type:MM_ANONPAGES val:22 [ 31.435875] ================================================================== [ 31.436987] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.437923] Read of size 8 at addr ffff88800e08c880 by task sshd/219 [ 31.438804] [ 31.439033] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.439900] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.440906] Call Trace: [ 31.441228] <TASK> [ 31.441518] dump_stack_lvl+0x91/0xf0 [ 31.442008] print_report+0xcc/0x620 [ 31.442493] ? __virt_addr_valid+0x102/0x340 [ 31.443052] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.443664] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.444309] kasan_report+0xbe/0xf0 [ 31.444800] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.445417] vma_interval_tree_remove+0xc75/0xec0 [ 31.446014] vma_prepare+0xc54/0x11a0 [ 31.446488] __split_vma+0x5af/0x950 [ 31.446954] ? __pfx___split_vma+0x10/0x10 [ 31.447476] ? find_held_lock+0x2c/0x110 [ 31.447998] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.448571] ? lock_is_held_type+0x9f/0x120 [ 31.449109] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.449712] ? mtree_range_walk+0x632/0x900 [ 31.450268] ? mas_walk+0x5c7/0x7c0 [ 31.450737] do_vmi_munmap+0x1f1/0x2b0 [ 31.451227] mmap_region+0x1f9/0x2660 [ 31.451704] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.452222] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.452932] ? __pfx_lock_acquire+0x10/0x10 [ 31.453471] ? __pfx_mmap_region+0x10/0x10 [ 31.453999] ? security_mmap_addr+0x7d/0xa0 [ 31.454531] ? get_unmapped_area+0x1f5/0x3f0 [ 31.455075] do_mmap+0x854/0xf00 [ 31.455511] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.456003] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.456588] ksys_mmap_pgoff+0x3af/0x500 [ 31.457090] do_syscall_64+0x3f/0x90 [ 31.457576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.458220] RIP: 0033:0x7fbcbea22d82 [ 31.458673] 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 [ 31.460810] RSP: 002b:00007ffe1b94bc98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.461703] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbcbea22d82 [ 31.462556] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbcbde5c000 [ 31.463402] RBP: 00007fbcbde5c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.464292] R10: 0000000000000812 R11: 0000000000000206 R12: 000056379d75cec0 [ 31.465139] R13: 00007ffe1b94bcb0 R14: 00007ffe1b94bce0 R15: 00007ffe1b94c040 [ 31.465994] </TASK> [ 31.466283] [ 31.466496] Allocated by task 212: [ 31.466923] kasan_save_stack+0x22/0x50 [ 31.467428] kasan_set_track+0x25/0x30 [ 31.467924] __kasan_slab_alloc+0x59/0x70 [ 31.468455] kmem_cache_alloc+0x16b/0x370 [ 31.468974] vm_area_dup+0x20/0x160 [ 31.469427] __split_vma+0x170/0x950 [ 31.469895] split_vma+0xc6/0x110 [ 31.470330] mprotect_fixup+0x8d2/0xb30 [ 31.470825] do_mprotect_pkey+0x87e/0xd40 [ 31.471339] __x64_sys_mprotect+0x78/0xc0 [ 31.471852] do_syscall_64+0x3f/0x90 [ 31.472331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.472962] [ 31.473176] Freed by task 13: [ 31.473554] kasan_save_stack+0x22/0x50 [ 31.474052] kasan_set_track+0x25/0x30 [ 31.474547] kasan_save_free_info+0x2b/0x50 [ 31.475078] __kasan_slab_free+0x10a/0x190 [ 31.475606] kmem_cache_free+0x10d/0x4d0 [ 31.476133] rcu_core+0x8c8/0x2860 [ 31.476585] __do_softirq+0x1b7/0x7d4 [ 31.477056] [ 31.477270] Last potentially related work creation: [ 31.477860] kasan_save_stack+0x22/0x50 [ 31.478358] __kasan_record_aux_stack+0x8e/0xa0 [ 31.478928] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.479567] remove_vma+0x139/0x170 [ 31.480015] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.480585] do_vmi_munmap+0x1f1/0x2b0 [ 31.481072] __vm_munmap+0x138/0x3a0 [ 31.481534] __x64_sys_munmap+0x59/0x80 [ 31.482027] do_syscall_64+0x3f/0x90 [ 31.482501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.483137] [ 31.483352] Second to last potentially related work creation: [ 31.484032] kasan_save_stack+0x22/0x50 [ 31.484538] __kasan_record_aux_stack+0x8e/0xa0 [ 31.485104] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.485753] remove_vma+0x139/0x170 [ 31.486203] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.486776] do_vmi_munmap+0x1f1/0x2b0 [ 31.487264] mmap_region+0x1f9/0x2660 [ 31.487747] do_mmap+0x854/0xf00 [ 31.488232] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.488728] ksys_mmap_pgoff+0x3af/0x500 [ 31.489235] do_syscall_64+0x3f/0x90 [ 31.489713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.490357] [ 31.490577] The buggy address belongs to the object at ffff88800e08c828 [ 31.490577] which belongs to the cache vm_area_struct of size 168 [ 31.492053] The buggy address is located 88 bytes inside of [ 31.492053] freed 168-byte region [ffff88800e08c828, ffff88800e08c8d0) [ 31.493473] [ 31.493692] The buggy address belongs to the physical page: [ 31.494352] page:000000008b47fbd4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe08c [ 31.495442] memcg:ffff88800d540e01 [ 31.495869] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.496589] page_type: 0xffffffff() [ 31.497047] raw: 0100000000000200 ffff88800879fc80 ffffea0000358c00 dead000000000003 [ 31.497966] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d540e01 [ 31.498879] page dumped because: kasan: bad access detected [ 31.499548] [ 31.499767] Memory state around the buggy address: [ 31.500352] ffff88800e08c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.501210] ffff88800e08c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.502070] >ffff88800e08c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.502925] ^ [ 31.503345] ffff88800e08c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.504210] ffff88800e08c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.505069] ================================================================== [ 31.506060] Disabling lock debugging due to kernel taint [ 33.966728] BUG: Bad rss-counter state mm:0000000055ac0775 type:MM_FILEPAGES val:33 [ 33.967700] BUG: Bad rss-counter state mm:0000000055ac0775 type:MM_ANONPAGES val:22 [ 34.414729] BUG: Bad rss-counter state mm:000000007a5f5294 type:MM_FILEPAGES val:33 [ 34.415898] BUG: Bad rss-counter state mm:000000007a5f5294 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7419' (ECDSA) to the list of known hosts. 2023/06/19 18:19:18 fuzzer started 2023/06/19 18:19:18 dialing manager at localhost:44161 2023/06/19 18:19:18 checking machine... 2023/06/19 18:19:18 checking revisions... [ 35.112778] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:19:18 testing simple program... [ 35.159686] cgroup: Unknown subsys name 'net' [ 35.207579] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:19:17 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffff88806c8eca50 RDX=0000000000000000 RSI=ffffffff846000aa RDI=0000000000000000 RBP=ffff888008442780 RSP=ffff8880146af688 R8 =000000004fa01401 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000031 R13=ffff888015e8f100 R14=ffffffff818c8d22 R15=0000000000000020 RIP=ffffffff8135b910 RFL=00000216 [----AP-] 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 00007f84f9be0900 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=00007fad626cb650 CR3=000000000d69e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=28a1ae91b7d1150300000000000ae988 XMM05=3b0d7e7bfbb160e50000000000136500 XMM06=dfcdbad4f1609c370000000000135028 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffe7a79b518 CR3=0000000005482000 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=00007fa76d881510000055ff37560790 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