syzkaller login: [ 30.467193] BUG: Bad rss-counter state mm:0000000025323594 type:MM_FILEPAGES val:33 [ 30.468765] BUG: Bad rss-counter state mm:0000000025323594 type:MM_ANONPAGES val:22 [ 30.636869] ================================================================== [ 30.637872] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.638861] Read of size 8 at addr ffff88800689edf0 by task sshd/220 [ 30.639772] [ 30.640003] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.640918] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.641948] Call Trace: [ 30.642287] [ 30.642589] dump_stack_lvl+0x91/0xf0 [ 30.643134] print_report+0xcc/0x620 [ 30.643656] ? __virt_addr_valid+0x102/0x340 [ 30.644241] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.644913] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.645564] kasan_report+0xbe/0xf0 [ 30.646073] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.646731] vma_interval_tree_remove+0xc75/0xec0 [ 30.647367] vma_prepare+0xc54/0x11a0 [ 30.647878] __split_vma+0x5af/0x950 [ 30.648378] ? __pfx___split_vma+0x10/0x10 [ 30.648954] ? find_held_lock+0x2c/0x110 [ 30.649506] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.650109] ? lock_is_held_type+0x9f/0x120 [ 30.650684] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.651332] ? mtree_range_walk+0x632/0x900 [ 30.651920] ? mas_walk+0x5c7/0x7c0 [ 30.652424] do_vmi_munmap+0x1f1/0x2b0 [ 30.652959] mmap_region+0x1f9/0x2660 [ 30.653473] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.654023] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.654783] ? __pfx_lock_acquire+0x10/0x10 [ 30.655351] ? __pfx_mmap_region+0x10/0x10 [ 30.655923] ? security_mmap_addr+0x7d/0xa0 [ 30.656494] ? get_unmapped_area+0x1f5/0x3f0 [ 30.657091] do_mmap+0x854/0xf00 [ 30.657562] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.658090] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.658685] ksys_mmap_pgoff+0x3af/0x500 [ 30.659226] do_syscall_64+0x3f/0x90 [ 30.659739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.660425] RIP: 0033:0x7f308de4bd82 [ 30.660932] 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 [ 30.663184] RSP: 002b:00007ffcca65f7b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.664144] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f308de4bd82 [ 30.665052] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f308d285000 [ 30.665948] RBP: 00007f308d285000 R08: 0000000000000009 R09: 0000000000001000 [ 30.666846] R10: 0000000000000812 R11: 0000000000000206 R12: 00005585100c6b20 [ 30.667750] R13: 00007ffcca65f7d0 R14: 00007ffcca65f800 R15: 00007ffcca65fb60 [ 30.668669] [ 30.669004] [ 30.669233] Allocated by task 213: [ 30.669686] kasan_save_stack+0x22/0x50 [ 30.670220] kasan_set_track+0x25/0x30 [ 30.670743] __kasan_slab_alloc+0x59/0x70 [ 30.671303] kmem_cache_alloc+0x16b/0x370 [ 30.671855] vm_area_dup+0x20/0x160 [ 30.672336] __split_vma+0x170/0x950 [ 30.672837] split_vma+0xc6/0x110 [ 30.673306] mprotect_fixup+0x8d2/0xb30 [ 30.673838] do_mprotect_pkey+0x87e/0xd40 [ 30.674397] __x64_sys_mprotect+0x78/0xc0 [ 30.674947] do_syscall_64+0x3f/0x90 [ 30.675456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.676142] [ 30.676371] Freed by task 213: [ 30.676798] kasan_save_stack+0x22/0x50 [ 30.677337] kasan_set_track+0x25/0x30 [ 30.677864] kasan_save_free_info+0x2b/0x50 [ 30.678427] __kasan_slab_free+0x10a/0x190 [ 30.678998] kmem_cache_free+0x10d/0x4d0 [ 30.679533] rcu_core+0x8c8/0x2860 [ 30.680004] __do_softirq+0x1b7/0x7d4 [ 30.680514] [ 30.680762] Last potentially related work creation: [ 30.681388] kasan_save_stack+0x22/0x50 [ 30.681917] __kasan_record_aux_stack+0x8e/0xa0 [ 30.682533] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.683220] remove_vma+0x139/0x170 [ 30.683708] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.684302] do_vmi_munmap+0x1f1/0x2b0 [ 30.684826] __vm_munmap+0x138/0x3a0 [ 30.685329] __x64_sys_munmap+0x59/0x80 [ 30.685859] do_syscall_64+0x3f/0x90 [ 30.686361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.687047] [ 30.687276] The buggy address belongs to the object at ffff88800689ed98 [ 30.687276] which belongs to the cache vm_area_struct of size 168 [ 30.688853] The buggy address is located 88 bytes inside of [ 30.688853] freed 168-byte region [ffff88800689ed98, ffff88800689ee40) [ 30.690323] [ 30.690558] The buggy address belongs to the physical page: [ 30.691260] page:000000007d1a8d44 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x689e [ 30.692407] memcg:ffff888015e1da01 [ 30.692870] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.693543] page_type: 0xffffffff() [ 30.694019] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.694997] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e1da01 [ 30.695955] page dumped because: kasan: bad access detected [ 30.696656] [ 30.696903] Memory state around the buggy address: [ 30.697520] ffff88800689ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.698423] ffff88800689ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.699317] >ffff88800689ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.700218] ^ [ 30.701081] ffff88800689ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.701985] ffff88800689ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.702888] ================================================================== [ 30.704051] Disabling lock debugging due to kernel taint [ 33.077726] BUG: Bad rss-counter state mm:0000000018778ec5 type:MM_FILEPAGES val:33 [ 33.078870] BUG: Bad rss-counter state mm:0000000018778ec5 type:MM_ANONPAGES val:22 [ 33.455707] BUG: Bad rss-counter state mm:0000000079556a5a type:MM_FILEPAGES val:33 [ 33.456883] BUG: Bad rss-counter state mm:0000000079556a5a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26951' (ECDSA) to the list of known hosts. 2023/06/20 08:26:09 fuzzer started 2023/06/20 08:26:09 dialing manager at localhost:44161 2023/06/20 08:26:09 checking machine... 2023/06/20 08:26:09 checking revisions... [ 34.186522] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:26:09 testing simple program... [ 34.240485] cgroup: Unknown subsys name 'net' [ 34.283352] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:26:09 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f38ed864020 CR3=000000000ed84000 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=00000000000000000000000000000000 XMM01=b72c0d150f756d8ce346f3a204067d00 XMM02=000000000011c4e8eff9b2d0a8fce9cb XMM03=000000000011c5b82c67c8bc2e329bc3 XMM04=78a4e884457299e900000000000ae988 XMM05=c66bc2c48049fd8500000000001348d0 XMM06=4fda316b135da52b0000000000133970 XMM07=e042d86d42eb936e0000000000124158 XMM08=751e77676d6581ff000000000011c5b8 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=ffff888008c58400 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=00007fe67e3b9618 CR3=0000000013fbe000 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=2039303a36323a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a36323a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000