syzkaller login: [ 31.509148] BUG: Bad rss-counter state mm:00000000357a2538 type:MM_FILEPAGES val:33 [ 31.510358] BUG: Bad rss-counter state mm:00000000357a2538 type:MM_ANONPAGES val:22 [ 31.672280] ================================================================== [ 31.673210] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.674169] Read of size 8 at addr ffff88801428b140 by task sshd/219 [ 31.674988] [ 31.675213] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.676185] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.677175] Call Trace: [ 31.677500] [ 31.677786] dump_stack_lvl+0x91/0xf0 [ 31.678309] print_report+0xcc/0x620 [ 31.678795] ? __virt_addr_valid+0x102/0x340 [ 31.679349] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.679968] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.680588] kasan_report+0xbe/0xf0 [ 31.681068] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.681695] vma_interval_tree_remove+0xc75/0xec0 [ 31.682313] vma_prepare+0xc54/0x11a0 [ 31.682796] __split_vma+0x5af/0x950 [ 31.683271] ? __pfx___split_vma+0x10/0x10 [ 31.683808] ? find_held_lock+0x2c/0x110 [ 31.684339] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.684908] ? lock_is_held_type+0x9f/0x120 [ 31.685448] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.686075] ? mtree_range_walk+0x632/0x900 [ 31.686636] ? mas_walk+0x5c7/0x7c0 [ 31.687121] do_vmi_munmap+0x1f1/0x2b0 [ 31.687616] mmap_region+0x1f9/0x2660 [ 31.688103] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.688618] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.689334] ? __pfx_lock_acquire+0x10/0x10 [ 31.689887] ? __pfx_mmap_region+0x10/0x10 [ 31.690423] ? security_mmap_addr+0x7d/0xa0 [ 31.690962] ? get_unmapped_area+0x1f5/0x3f0 [ 31.691523] do_mmap+0x854/0xf00 [ 31.691970] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.692463] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.693034] ksys_mmap_pgoff+0x3af/0x500 [ 31.693548] do_syscall_64+0x3f/0x90 [ 31.694041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.694699] RIP: 0033:0x7fa0f750bd82 [ 31.695161] 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 [ 31.697310] RSP: 002b:00007ffd7362def8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.698247] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa0f750bd82 [ 31.699107] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa0f6945000 [ 31.699958] RBP: 00007fa0f6945000 R08: 0000000000000009 R09: 0000000000001000 [ 31.700820] R10: 0000000000000812 R11: 0000000000000206 R12: 000055af3b4f7ec0 [ 31.701673] R13: 00007ffd7362df10 R14: 00007ffd7362df40 R15: 00007ffd7362e2a0 [ 31.702548] [ 31.702837] [ 31.703058] Allocated by task 212: [ 31.703496] kasan_save_stack+0x22/0x50 [ 31.704005] kasan_set_track+0x25/0x30 [ 31.704511] __kasan_slab_alloc+0x59/0x70 [ 31.705043] kmem_cache_alloc+0x16b/0x370 [ 31.705557] vm_area_dup+0x20/0x160 [ 31.706039] __split_vma+0x170/0x950 [ 31.706519] split_vma+0xc6/0x110 [ 31.706960] mprotect_fixup+0x8d2/0xb30 [ 31.707470] do_mprotect_pkey+0x87e/0xd40 [ 31.707996] __x64_sys_mprotect+0x78/0xc0 [ 31.708522] do_syscall_64+0x3f/0x90 [ 31.709002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.709650] [ 31.709880] Freed by task 212: [ 31.710296] kasan_save_stack+0x22/0x50 [ 31.710806] kasan_set_track+0x25/0x30 [ 31.711303] kasan_save_free_info+0x2b/0x50 [ 31.711849] __kasan_slab_free+0x10a/0x190 [ 31.712391] kmem_cache_free+0x10d/0x4d0 [ 31.712906] rcu_core+0x8c8/0x2860 [ 31.713355] __do_softirq+0x1b7/0x7d4 [ 31.713833] [ 31.714061] Last potentially related work creation: [ 31.714656] kasan_save_stack+0x22/0x50 [ 31.715159] __kasan_record_aux_stack+0x8e/0xa0 [ 31.715731] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.716383] remove_vma+0x139/0x170 [ 31.716835] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.717389] do_vmi_munmap+0x1f1/0x2b0 [ 31.717912] __vm_munmap+0x138/0x3a0 [ 31.718380] __x64_sys_munmap+0x59/0x80 [ 31.718883] do_syscall_64+0x3f/0x90 [ 31.719357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.720014] [ 31.720231] The buggy address belongs to the object at ffff88801428b0e8 [ 31.720231] which belongs to the cache vm_area_struct of size 168 [ 31.721720] The buggy address is located 88 bytes inside of [ 31.721720] freed 168-byte region [ffff88801428b0e8, ffff88801428b190) [ 31.723142] [ 31.723363] The buggy address belongs to the physical page: [ 31.724049] page:00000000d0f28105 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1428b [ 31.725166] memcg:ffff888014173d01 [ 31.725606] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.726340] page_type: 0xffffffff() [ 31.726803] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.727735] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014173d01 [ 31.728674] page dumped because: kasan: bad access detected [ 31.729347] [ 31.729566] Memory state around the buggy address: [ 31.730198] ffff88801428b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.731053] ffff88801428b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.731906] >ffff88801428b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.732758] ^ [ 31.733410] ffff88801428b180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.734291] ffff88801428b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.735151] ================================================================== [ 31.736224] Disabling lock debugging due to kernel taint [ 33.727453] BUG: Bad rss-counter state mm:00000000353bd128 type:MM_FILEPAGES val:33 [ 33.729069] BUG: Bad rss-counter state mm:00000000353bd128 type:MM_ANONPAGES val:22 [ 34.202107] BUG: Bad rss-counter state mm:000000005e2b8713 type:MM_FILEPAGES val:33 [ 34.203091] BUG: Bad rss-counter state mm:000000005e2b8713 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18962' (ECDSA) to the list of known hosts. 2023/06/20 13:05:20 fuzzer started 2023/06/20 13:05:20 dialing manager at localhost:36067 2023/06/20 13:05:20 checking machine... 2023/06/20 13:05:20 checking revisions... [ 34.937870] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:05:20 testing simple program... [ 34.988481] cgroup: Unknown subsys name 'net' [ 35.031431] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:05:20 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000003 RCX=0000000000000000 RDX=00005573f1aba5d0 RSI=0000000000000007 RDI=00005573f1acec30 RBP=00007f37f3b01b80 RSP=00007ffce26fece0 R8 =0000000000000007 R9 =00007ffce26f8128 R10=00005573f1ad20b0 R11=0000000000000246 R12=00005573f1acec20 R13=0000000000000000 R14=00005573f1acec50 R15=00007ffce26feef0 RIP=00007f37f39c9a39 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f37f354f900 00000000 00000000 GS =0000 0000000000000000 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=00007ffce26f9000 CR3=000000000cc18000 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=6720646572637465733a4d41503d706f 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 info registers vcpu 1 RAX=0000000000000035 RBX=0000000000000035 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff888009b20000 RSP=ffff88800a1cf7d0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=0000000000000128 R12=00000000000101f7 R13=ffff888009b201a0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff82191d9e RFL=00000093 [--S-A-C] 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 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=00007f3de12d5850 CR3=0000000013642000 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=4aed9b718496a78f6b4d1cf1a126068b XMM02=2c67c8bc2e329bc3000000000011ac58 XMM03=fb795ef6d657705600000000001219c8 XMM04=80ab2fde5e77ef2800000000000ae988 XMM05=e3bf42665659ae980000000000132698 XMM06=806171799158d96700000000001313c8 XMM07=e042d86d42eb936e0000000000121ca0 XMM08=4803e8a7fccb3a80000000000011acb8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000