syzkaller login: [ 30.440264] BUG: Bad rss-counter state mm:00000000746e6ce8 type:MM_FILEPAGES val:33 [ 30.441248] BUG: Bad rss-counter state mm:00000000746e6ce8 type:MM_ANONPAGES val:22 [ 30.642971] ================================================================== [ 30.644074] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.645197] Read of size 8 at addr ffff88800dabaed8 by task sshd/221 [ 30.646271] [ 30.646504] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.647422] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.648479] Call Trace: [ 30.648822] [ 30.649129] dump_stack_lvl+0x91/0xf0 [ 30.649664] print_report+0xcc/0x620 [ 30.650184] ? __virt_addr_valid+0x102/0x340 [ 30.650768] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.651433] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.652104] kasan_report+0xbe/0xf0 [ 30.652619] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.653291] vma_interval_tree_remove+0xc75/0xec0 [ 30.653939] vma_prepare+0xc54/0x11a0 [ 30.654468] __split_vma+0x5af/0x950 [ 30.654989] ? __pfx___split_vma+0x10/0x10 [ 30.655568] ? find_held_lock+0x2c/0x110 [ 30.656131] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.656755] ? lock_is_held_type+0x9f/0x120 [ 30.657374] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.658039] ? mtree_range_walk+0x632/0x900 [ 30.658651] ? mas_walk+0x5c7/0x7c0 [ 30.659173] do_vmi_munmap+0x1f1/0x2b0 [ 30.659711] mmap_region+0x1f9/0x2660 [ 30.660240] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.660808] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.661596] ? __pfx_lock_acquire+0x10/0x10 [ 30.662178] ? __pfx_mmap_region+0x10/0x10 [ 30.662760] ? security_mmap_addr+0x7d/0xa0 [ 30.663345] ? get_unmapped_area+0x1f5/0x3f0 [ 30.663952] do_mmap+0x854/0xf00 [ 30.664433] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.664978] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.665611] ksys_mmap_pgoff+0x3af/0x500 [ 30.666170] do_syscall_64+0x3f/0x90 [ 30.666699] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.667416] RIP: 0033:0x7fb053bd5d82 [ 30.667918] 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 [ 30.670274] RSP: 002b:00007ffcf2b85508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.671279] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb053bd5d82 [ 30.672220] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb05300f000 [ 30.673155] RBP: 00007fb05300f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.674103] R10: 0000000000000812 R11: 0000000000000206 R12: 00005606e5cfdf70 [ 30.675039] R13: 00007ffcf2b85520 R14: 00007ffcf2b85550 R15: 00007ffcf2b858b0 [ 30.675986] [ 30.676306] [ 30.676543] Allocated by task 212: [ 30.677017] kasan_save_stack+0x22/0x50 [ 30.677579] kasan_set_track+0x25/0x30 [ 30.678130] __kasan_slab_alloc+0x59/0x70 [ 30.678711] kmem_cache_alloc+0x16b/0x370 [ 30.679284] vm_area_dup+0x20/0x160 [ 30.679786] __split_vma+0x170/0x950 [ 30.680307] split_vma+0xc6/0x110 [ 30.680795] mprotect_fixup+0x8d2/0xb30 [ 30.681359] do_mprotect_pkey+0x87e/0xd40 [ 30.681939] __x64_sys_mprotect+0x78/0xc0 [ 30.682515] do_syscall_64+0x3f/0x90 [ 30.683036] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.683746] [ 30.683984] Freed by task 19: [ 30.684410] kasan_save_stack+0x22/0x50 [ 30.684960] kasan_set_track+0x25/0x30 [ 30.685522] kasan_save_free_info+0x2b/0x50 [ 30.686117] __kasan_slab_free+0x10a/0x190 [ 30.686741] kmem_cache_free+0x10d/0x4d0 [ 30.687303] rcu_core+0x8c8/0x2860 [ 30.687793] __do_softirq+0x1b7/0x7d4 [ 30.688322] [ 30.688562] Last potentially related work creation: [ 30.689218] kasan_save_stack+0x22/0x50 [ 30.689782] __kasan_record_aux_stack+0x8e/0xa0 [ 30.690415] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.691124] remove_vma+0x139/0x170 [ 30.691621] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.692231] do_vmi_munmap+0x1f1/0x2b0 [ 30.692772] __vm_munmap+0x138/0x3a0 [ 30.693311] __x64_sys_munmap+0x59/0x80 [ 30.693864] do_syscall_64+0x3f/0x90 [ 30.694392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.695099] [ 30.695338] Second to last potentially related work creation: [ 30.696104] kasan_save_stack+0x22/0x50 [ 30.696663] __kasan_record_aux_stack+0x8e/0xa0 [ 30.697299] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.698009] remove_vma+0x139/0x170 [ 30.698508] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.699127] do_vmi_munmap+0x1f1/0x2b0 [ 30.699664] mmap_region+0x1f9/0x2660 [ 30.700174] do_mmap+0x854/0xf00 [ 30.700637] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.701165] ksys_mmap_pgoff+0x3af/0x500 [ 30.701722] do_syscall_64+0x3f/0x90 [ 30.702227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.702906] [ 30.703136] The buggy address belongs to the object at ffff88800dabae80 [ 30.703136] which belongs to the cache vm_area_struct of size 168 [ 30.704709] The buggy address is located 88 bytes inside of [ 30.704709] freed 168-byte region [ffff88800dabae80, ffff88800dabaf28) [ 30.706242] [ 30.706472] The buggy address belongs to the physical page: [ 30.707184] page:00000000fa35842d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdaba [ 30.708354] memcg:ffff888013f0ad01 [ 30.708810] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.709570] page_type: 0xffffffff() [ 30.710051] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.711032] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f0ad01 [ 30.711998] page dumped because: kasan: bad access detected [ 30.712707] [ 30.712939] Memory state around the buggy address: [ 30.713580] ffff88800dabad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.714490] ffff88800dabae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.715404] >ffff88800dabae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.716310] ^ [ 30.717089] ffff88800dabaf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.718050] ffff88800dabaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.718962] ================================================================== [ 30.720054] Disabling lock debugging due to kernel taint [ 32.700268] BUG: Bad rss-counter state mm:00000000dba3374d type:MM_FILEPAGES val:33 [ 32.701322] BUG: Bad rss-counter state mm:00000000dba3374d type:MM_ANONPAGES val:22 [ 33.213643] BUG: Bad rss-counter state mm:00000000746ab96b type:MM_FILEPAGES val:33 [ 33.214856] BUG: Bad rss-counter state mm:00000000746ab96b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5073' (ECDSA) to the list of known hosts. 2023/06/21 00:58:58 fuzzer started 2023/06/21 00:58:58 dialing manager at localhost:36067 2023/06/21 00:58:58 checking machine... 2023/06/21 00:58:58 checking revisions... [ 33.937280] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:58:58 testing simple program... [ 33.991733] cgroup: Unknown subsys name 'net' [ 34.047815] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:58:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff813ba253 RDI=0000000000000007 RBP=ffffffff8540a0c8 RSP=ffff88806ce09e58 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806ce09ff8 R12=ffff88806ce293c0 R13=dffffc0000000000 R14=fffffbfff0a81e40 R15=1ffff1100d9c5282 RIP=ffffffff814c0891 RFL=00000006 [-----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=00007fa945c28520 CR3=00000000167dc000 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=2037353a38353a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a38353a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000ef2b7139 RBX=000000006f34b4da RCX=ffff88800caff080 RDX=0000000000000014 RSI=000000000000001c RDI=000000001057cceb RBP=ffff88800844f780 RSP=ffff88800cafefe8 R8 =0000000010c3f6f3 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000092800 R14=ffff88800caff050 R15=0000000000000014 RIP=ffffffff82270461 RFL=00000206 [-----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 00007f10b27f6900 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=00007f10b27c0008 CR3=0000000016c5e000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000