syzkaller login: [ 32.627245] BUG: Bad rss-counter state mm:000000005d60990c type:MM_FILEPAGES val:33 [ 32.628657] BUG: Bad rss-counter state mm:000000005d60990c type:MM_ANONPAGES val:22 [ 32.789042] ================================================================== [ 32.790124] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.791229] Read of size 8 at addr ffff8880166c6b38 by task sshd/219 [ 32.792283] [ 32.792572] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.793529] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.794607] Call Trace: [ 32.794955] [ 32.795275] dump_stack_lvl+0x91/0xf0 [ 32.795808] print_report+0xcc/0x620 [ 32.796328] ? __virt_addr_valid+0x102/0x340 [ 32.796926] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.797580] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.798236] kasan_report+0xbe/0xf0 [ 32.798739] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.799399] vma_interval_tree_remove+0xc75/0xec0 [ 32.800040] vma_prepare+0xc54/0x11a0 [ 32.800554] __split_vma+0x5af/0x950 [ 32.801057] ? __pfx___split_vma+0x10/0x10 [ 32.801626] ? find_held_lock+0x2c/0x110 [ 32.802182] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.802785] ? lock_is_held_type+0x9f/0x120 [ 32.803355] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.804000] ? mtree_range_walk+0x632/0x900 [ 32.804629] ? mas_walk+0x5c7/0x7c0 [ 32.805156] do_vmi_munmap+0x1f1/0x2b0 [ 32.805700] mmap_region+0x1f9/0x2660 [ 32.806225] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.806791] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.807572] ? __pfx_lock_acquire+0x10/0x10 [ 32.808157] ? __pfx_mmap_region+0x10/0x10 [ 32.808745] ? security_mmap_addr+0x7d/0xa0 [ 32.809333] ? get_unmapped_area+0x1f5/0x3f0 [ 32.809936] do_mmap+0x854/0xf00 [ 32.810417] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.810959] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.811578] ksys_mmap_pgoff+0x3af/0x500 [ 32.812136] do_syscall_64+0x3f/0x90 [ 32.812663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.813373] RIP: 0033:0x7f3132adad82 [ 32.813876] 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 [ 32.816219] RSP: 002b:00007ffd9cd638a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.817225] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3132adad82 [ 32.818168] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3131f14000 [ 32.819107] RBP: 00007f3131f14000 R08: 0000000000000009 R09: 0000000000001000 [ 32.820040] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f03e503b20 [ 32.820970] R13: 00007ffd9cd638c0 R14: 00007ffd9cd638f0 R15: 00007ffd9cd63c50 [ 32.821909] [ 32.822230] [ 32.822464] Allocated by task 212: [ 32.822928] kasan_save_stack+0x22/0x50 [ 32.823472] kasan_set_track+0x25/0x30 [ 32.824015] __kasan_slab_alloc+0x59/0x70 [ 32.824606] kmem_cache_alloc+0x16b/0x370 [ 32.825174] vm_area_dup+0x20/0x160 [ 32.825670] __split_vma+0x170/0x950 [ 32.826182] split_vma+0xc6/0x110 [ 32.826664] mprotect_fixup+0x8d2/0xb30 [ 32.827223] do_mprotect_pkey+0x87e/0xd40 [ 32.827794] __x64_sys_mprotect+0x78/0xc0 [ 32.828366] do_syscall_64+0x3f/0x90 [ 32.828901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.829602] [ 32.829836] Freed by task 13: [ 32.830254] kasan_save_stack+0x22/0x50 [ 32.830805] kasan_set_track+0x25/0x30 [ 32.831345] kasan_save_free_info+0x2b/0x50 [ 32.831929] __kasan_slab_free+0x10a/0x190 [ 32.832513] kmem_cache_free+0x10d/0x4d0 [ 32.833086] rcu_core+0x8c8/0x2860 [ 32.833565] __do_softirq+0x1b7/0x7d4 [ 32.834085] [ 32.834317] Last potentially related work creation: [ 32.834955] kasan_save_stack+0x22/0x50 [ 32.835503] __kasan_record_aux_stack+0x8e/0xa0 [ 32.836135] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.836845] remove_vma+0x139/0x170 [ 32.837328] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.837916] do_vmi_munmap+0x1f1/0x2b0 [ 32.838433] __vm_munmap+0x138/0x3a0 [ 32.838925] __x64_sys_munmap+0x59/0x80 [ 32.839451] do_syscall_64+0x3f/0x90 [ 32.839952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.840643] [ 32.840874] The buggy address belongs to the object at ffff8880166c6ae0 [ 32.840874] which belongs to the cache vm_area_struct of size 168 [ 32.842439] The buggy address is located 88 bytes inside of [ 32.842439] freed 168-byte region [ffff8880166c6ae0, ffff8880166c6b88) [ 32.843919] [ 32.844148] The buggy address belongs to the physical page: [ 32.844849] page:00000000c43c3a3d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166c6 [ 32.846020] memcg:ffff888018ca6f01 [ 32.846479] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.847177] page_type: 0xffffffff() [ 32.847708] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.848791] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ca6f01 [ 32.849790] page dumped because: kasan: bad access detected [ 32.850514] [ 32.850750] Memory state around the buggy address: [ 32.851385] ffff8880166c6a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.852324] ffff8880166c6a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 32.853258] >ffff8880166c6b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.854188] ^ [ 32.854857] ffff8880166c6b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.855799] ffff8880166c6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.856743] ================================================================== [ 32.857982] Disabling lock debugging due to kernel taint [ 34.852192] BUG: Bad rss-counter state mm:00000000a0e653c0 type:MM_FILEPAGES val:33 [ 34.853658] BUG: Bad rss-counter state mm:00000000a0e653c0 type:MM_ANONPAGES val:22 [ 35.342055] BUG: Bad rss-counter state mm:00000000a85523ae type:MM_FILEPAGES val:33 [ 35.343031] BUG: Bad rss-counter state mm:00000000a85523ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1598' (ECDSA) to the list of known hosts. 2023/06/19 18:20:04 fuzzer started 2023/06/19 18:20:04 dialing manager at localhost:44161 2023/06/19 18:20:04 checking machine... 2023/06/19 18:20:04 checking revisions... [ 36.063695] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:20:04 testing simple program... [ 36.113876] cgroup: Unknown subsys name 'net' [ 36.160336] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:20:02 Registers: info registers vcpu 0 RAX=ffffffff8180c8da RBX=ffffffff813ad420 RCX=ffffffff86137d01 RDX=1ffff110011aff3a RSI=ffffffff8180c8da RDI=ffff888008d7fa40 RBP=ffff888008d7fa10 RSP=ffff888008d7f970 R8 =ffffffff86137dd6 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000020f00 R12=ffff888008d7fa40 R13=0000000000000000 R14=ffff888008d70000 R15=ffff88800cfdaa00 RIP=ffffffff813ad420 RFL=00000282 [--S----] 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=00007f402c3ba650 CR3=0000000009ab0000 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=2033303a30323a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a30323a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000055eef2a53010 RBX=0000000000000003 RCX=0000000000000013 RDX=0000000000000004 RSI=000055eef2a96ca0 RDI=0000000000000041 RBP=0000000000000041 RSP=00007fffa9ab29b0 R8 =000055eef2a93690 R9 =ffffffffffffff01 R10=0000000000000002 R11=000055eef2a54358 R12=fffffffffffffe00 R13=00000000fffffffa R14=000055eef2a97170 R15=0000000000000002 RIP=00007f1c8c2d720b 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 00007f1c8ba82900 00000000 00000000 GS =0000 0000000000000000 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=00007f1c8aebed00 CR3=000000000d6ac000 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=00000000000000000000000000000000 XMM02=00000000000000410000000000000038 XMM03=0000000000656369767265732e687373 XMM04=66799c27d7c7e9bc00000000000ae988 XMM05=9695c4587cc171620000000000134cd0 XMM06=806171799158d9670000000000133ac0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000