syzkaller login: [ 30.806062] BUG: Bad rss-counter state mm:0000000091b3d230 type:MM_FILEPAGES val:33 [ 30.807249] BUG: Bad rss-counter state mm:0000000091b3d230 type:MM_ANONPAGES val:22 [ 30.845206] ================================================================== [ 30.846169] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.847155] Read of size 8 at addr ffff88800eb15c20 by task sshd/221 [ 30.847917] [ 30.848134] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.849022] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.849987] Call Trace: [ 30.850304] [ 30.850583] dump_stack_lvl+0x91/0xf0 [ 30.851070] print_report+0xcc/0x620 [ 30.851551] ? __virt_addr_valid+0x102/0x340 [ 30.852094] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.852721] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.853339] kasan_report+0xbe/0xf0 [ 30.853808] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854430] vma_interval_tree_remove+0xc75/0xec0 [ 30.855027] vma_prepare+0xc54/0x11a0 [ 30.855500] __split_vma+0x5af/0x950 [ 30.855963] ? __pfx___split_vma+0x10/0x10 [ 30.856515] ? find_held_lock+0x2c/0x110 [ 30.857043] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.857605] ? lock_is_held_type+0x9f/0x120 [ 30.858144] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.858750] ? mtree_range_walk+0x632/0x900 [ 30.859298] ? mas_walk+0x5c7/0x7c0 [ 30.859766] do_vmi_munmap+0x1f1/0x2b0 [ 30.860250] mmap_region+0x1f9/0x2660 [ 30.860759] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.861263] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.861980] ? __pfx_lock_acquire+0x10/0x10 [ 30.862515] ? __pfx_mmap_region+0x10/0x10 [ 30.863050] ? security_mmap_addr+0x7d/0xa0 [ 30.863572] ? get_unmapped_area+0x1f5/0x3f0 [ 30.864124] do_mmap+0x854/0xf00 [ 30.864599] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.865096] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.865659] ksys_mmap_pgoff+0x3af/0x500 [ 30.866170] do_syscall_64+0x3f/0x90 [ 30.866648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.867293] RIP: 0033:0x7fcc7a19dd82 [ 30.867743] 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 [ 30.869883] RSP: 002b:00007ffff6016b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.870788] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc7a19dd82 [ 30.871631] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc795d7000 [ 30.872490] RBP: 00007fcc795d7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.873348] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559b88fdbec0 [ 30.874188] R13: 00007ffff6016b50 R14: 00007ffff6016b80 R15: 00007ffff6016ee0 [ 30.875043] [ 30.875336] [ 30.875550] Allocated by task 214: [ 30.875977] kasan_save_stack+0x22/0x50 [ 30.876494] kasan_set_track+0x25/0x30 [ 30.876994] __kasan_slab_alloc+0x59/0x70 [ 30.877518] kmem_cache_alloc+0x16b/0x370 [ 30.878037] vm_area_dup+0x20/0x160 [ 30.878486] __split_vma+0x170/0x950 [ 30.878951] split_vma+0xc6/0x110 [ 30.879385] mprotect_fixup+0x8d2/0xb30 [ 30.879889] do_mprotect_pkey+0x87e/0xd40 [ 30.880404] __x64_sys_mprotect+0x78/0xc0 [ 30.880961] do_syscall_64+0x3f/0x90 [ 30.881431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.882082] [ 30.882294] Freed by task 214: [ 30.882680] kasan_save_stack+0x22/0x50 [ 30.883184] kasan_set_track+0x25/0x30 [ 30.883674] kasan_save_free_info+0x2b/0x50 [ 30.884207] __kasan_slab_free+0x10a/0x190 [ 30.884776] kmem_cache_free+0x10d/0x4d0 [ 30.885284] rcu_core+0x8c8/0x2860 [ 30.885727] __do_softirq+0x1b7/0x7d4 [ 30.886203] [ 30.886419] Last potentially related work creation: [ 30.887013] kasan_save_stack+0x22/0x50 [ 30.887511] __kasan_record_aux_stack+0x8e/0xa0 [ 30.888084] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.888751] remove_vma+0x139/0x170 [ 30.889206] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.889755] do_vmi_munmap+0x1f1/0x2b0 [ 30.890245] __vm_munmap+0x138/0x3a0 [ 30.890708] __x64_sys_munmap+0x59/0x80 [ 30.891200] do_syscall_64+0x3f/0x90 [ 30.891674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.892313] [ 30.892563] The buggy address belongs to the object at ffff88800eb15bc8 [ 30.892563] which belongs to the cache vm_area_struct of size 168 [ 30.894028] The buggy address is located 88 bytes inside of [ 30.894028] freed 168-byte region [ffff88800eb15bc8, ffff88800eb15c70) [ 30.895424] [ 30.895639] The buggy address belongs to the physical page: [ 30.896296] page:00000000afe74a51 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb15 [ 30.897405] memcg:ffff88800eda0e01 [ 30.897831] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.898481] page_type: 0xffffffff() [ 30.898927] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.899845] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eda0e01 [ 30.900778] page dumped because: kasan: bad access detected [ 30.901436] [ 30.901649] Memory state around the buggy address: [ 30.902226] ffff88800eb15b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.903079] ffff88800eb15b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.903923] >ffff88800eb15c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.904814] ^ [ 30.905340] ffff88800eb15c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.906198] ffff88800eb15d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.907038] ================================================================== [ 30.908136] Disabling lock debugging due to kernel taint [ 33.318880] BUG: Bad rss-counter state mm:0000000003cc40b5 type:MM_FILEPAGES val:33 [ 33.319857] BUG: Bad rss-counter state mm:0000000003cc40b5 type:MM_ANONPAGES val:22 [ 33.802539] BUG: Bad rss-counter state mm:000000001dc72c10 type:MM_FILEPAGES val:33 [ 33.803541] BUG: Bad rss-counter state mm:000000001dc72c10 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3024' (ECDSA) to the list of known hosts. 2023/06/21 02:02:28 fuzzer started 2023/06/21 02:02:28 dialing manager at localhost:36067 2023/06/21 02:02:28 checking machine... 2023/06/21 02:02:28 checking revisions... [ 34.450123] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:02:28 testing simple program... [ 34.507762] cgroup: Unknown subsys name 'net' [ 34.561603] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:02:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f9cfad0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff856cd6a0 RBP=0000000000000001 RSP=ffff88800f9cfac0 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856cd6a0 R15=0000000000000000 RIP=ffffffff812d8e97 RFL=00000286 [--S--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 00007fa09706a900 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=00007fa0976220b0 CR3=000000000c7e0000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fbf2f324000 CR3=000000000c628000 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=dd910d328a0806b00746e2430a2d7646 XMM02=2c67c8bc2e329bc3000000000011d4e0 XMM03=fb795ef6d65770560000000000121c48 XMM04=aba87086e4bc471400000000000ae988 XMM05=fade746f73ba50ce00000000001328f8 XMM06=c291bd5c70af25b90000000000131998 XMM07=e042d86d42eb936e0000000000121ec8 XMM08=90990993c964d11d000000000011d540 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000