syzkaller login: [ 31.573217] BUG: Bad rss-counter state mm:0000000059719ef4 type:MM_FILEPAGES val:33 [ 31.574420] BUG: Bad rss-counter state mm:0000000059719ef4 type:MM_ANONPAGES val:22 [ 31.612412] ================================================================== [ 31.613533] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.614678] Read of size 8 at addr ffff88800e33e798 by task sshd/220 [ 31.615576] [ 31.615854] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.616911] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.618056] Call Trace: [ 31.618434] [ 31.618772] dump_stack_lvl+0x91/0xf0 [ 31.619355] print_report+0xcc/0x620 [ 31.619946] ? __virt_addr_valid+0x102/0x340 [ 31.620596] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.621321] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.622064] kasan_report+0xbe/0xf0 [ 31.622644] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.623405] vma_interval_tree_remove+0xc75/0xec0 [ 31.624170] vma_prepare+0xc54/0x11a0 [ 31.624760] __split_vma+0x5af/0x950 [ 31.625238] ? __pfx___split_vma+0x10/0x10 [ 31.625757] ? find_held_lock+0x2c/0x110 [ 31.626268] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.626824] ? lock_is_held_type+0x9f/0x120 [ 31.627354] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.627959] ? mtree_range_walk+0x632/0x900 [ 31.628502] ? mas_walk+0x5c7/0x7c0 [ 31.628974] do_vmi_munmap+0x1f1/0x2b0 [ 31.629459] mmap_region+0x1f9/0x2660 [ 31.629939] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.630442] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.631142] ? __pfx_lock_acquire+0x10/0x10 [ 31.631669] ? __pfx_mmap_region+0x10/0x10 [ 31.632225] ? security_mmap_addr+0x7d/0xa0 [ 31.632749] ? get_unmapped_area+0x1f5/0x3f0 [ 31.633291] do_mmap+0x854/0xf00 [ 31.633724] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.634223] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.634779] ksys_mmap_pgoff+0x3af/0x500 [ 31.635290] do_syscall_64+0x3f/0x90 [ 31.635775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.636415] RIP: 0033:0x7f78b4845d82 [ 31.636862] 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 [ 31.638988] RSP: 002b:00007ffd9b726e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.639887] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f78b4845d82 [ 31.640732] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f78b3c7f000 [ 31.641571] RBP: 00007f78b3c7f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.642413] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555bb0375d90 [ 31.643263] R13: 00007ffd9b726e80 R14: 00007ffd9b726eb0 R15: 00007ffd9b727210 [ 31.644133] [ 31.644425] [ 31.644644] Allocated by task 213: [ 31.645077] kasan_save_stack+0x22/0x50 [ 31.645583] kasan_set_track+0x25/0x30 [ 31.646073] __kasan_slab_alloc+0x59/0x70 [ 31.646603] kmem_cache_alloc+0x16b/0x370 [ 31.647119] vm_area_dup+0x20/0x160 [ 31.647572] __split_vma+0x170/0x950 [ 31.648051] split_vma+0xc6/0x110 [ 31.648486] mprotect_fixup+0x8d2/0xb30 [ 31.648982] do_mprotect_pkey+0x87e/0xd40 [ 31.649494] __x64_sys_mprotect+0x78/0xc0 [ 31.650016] do_syscall_64+0x3f/0x90 [ 31.650484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.651117] [ 31.651330] Freed by task 213: [ 31.651734] kasan_save_stack+0x22/0x50 [ 31.652232] kasan_set_track+0x25/0x30 [ 31.652723] kasan_save_free_info+0x2b/0x50 [ 31.653247] __kasan_slab_free+0x10a/0x190 [ 31.653771] kmem_cache_free+0x10d/0x4d0 [ 31.654272] rcu_core+0x8c8/0x2860 [ 31.654709] __do_softirq+0x1b7/0x7d4 [ 31.655181] [ 31.655396] Last potentially related work creation: [ 31.655977] kasan_save_stack+0x22/0x50 [ 31.656485] __kasan_record_aux_stack+0x8e/0xa0 [ 31.657059] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.657707] remove_vma+0x139/0x170 [ 31.658153] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.658705] do_vmi_munmap+0x1f1/0x2b0 [ 31.659191] __vm_munmap+0x138/0x3a0 [ 31.659655] __x64_sys_munmap+0x59/0x80 [ 31.660165] do_syscall_64+0x3f/0x90 [ 31.660633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.661280] [ 31.661492] The buggy address belongs to the object at ffff88800e33e740 [ 31.661492] which belongs to the cache vm_area_struct of size 168 [ 31.662946] The buggy address is located 88 bytes inside of [ 31.662946] freed 168-byte region [ffff88800e33e740, ffff88800e33e7e8) [ 31.664350] [ 31.664566] The buggy address belongs to the physical page: [ 31.665215] page:00000000cfe3c6e6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe33e [ 31.666278] memcg:ffff88800d169c01 [ 31.666700] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.667336] page_type: 0xffffffff() [ 31.667802] raw: 0100000000000200 ffff8880087a0c80 ffffea000036b1c0 dead000000000008 [ 31.668711] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d169c01 [ 31.669615] page dumped because: kasan: bad access detected [ 31.670279] [ 31.670497] Memory state around the buggy address: [ 31.671073] ffff88800e33e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.671935] ffff88800e33e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.672777] >ffff88800e33e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.673630] ^ [ 31.674128] ffff88800e33e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.674979] ffff88800e33e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.675838] ================================================================== [ 31.676982] Disabling lock debugging due to kernel taint [ 33.552842] BUG: Bad rss-counter state mm:00000000546503aa type:MM_FILEPAGES val:33 [ 33.554372] BUG: Bad rss-counter state mm:00000000546503aa type:MM_ANONPAGES val:22 [ 34.026233] BUG: Bad rss-counter state mm:00000000f8356ebc type:MM_FILEPAGES val:33 [ 34.027492] BUG: Bad rss-counter state mm:00000000f8356ebc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26517' (ECDSA) to the list of known hosts. 2023/06/21 06:39:46 fuzzer started 2023/06/21 06:39:46 dialing manager at localhost:36067 2023/06/21 06:39:46 checking machine... 2023/06/21 06:39:46 checking revisions... [ 34.724703] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:39:46 testing simple program... [ 34.777663] cgroup: Unknown subsys name 'net' [ 34.825704] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:39:45 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008e50000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f4b10d05d00 CR3=0000000018212000 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=2035343a39333a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a39333a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535ffc RSP=ffff88800c95fb70 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=0000000000000001 R15=0000000000000246 RIP=ffffffff8135b935 RFL=00000047 [---Z-PC] 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 00007f33e4c85900 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=00007ffea2ed9000 CR3=000000001c690000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000