syzkaller login: [ 28.870455] BUG: Bad rss-counter state mm:000000001a41feff type:MM_FILEPAGES val:33 [ 28.871475] BUG: Bad rss-counter state mm:000000001a41feff type:MM_ANONPAGES val:22 [ 29.034920] ================================================================== [ 29.035843] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.036807] Read of size 8 at addr ffff88800dca54e0 by task sshd/221 [ 29.037569] [ 29.037785] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.038775] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.039751] Call Trace: [ 29.040067] [ 29.040401] dump_stack_lvl+0x91/0xf0 [ 29.040901] print_report+0xcc/0x620 [ 29.041385] ? __virt_addr_valid+0x102/0x340 [ 29.041939] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.042566] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.043180] kasan_report+0xbe/0xf0 [ 29.043655] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.044290] vma_interval_tree_remove+0xc75/0xec0 [ 29.044905] vma_prepare+0xc54/0x11a0 [ 29.045384] __split_vma+0x5af/0x950 [ 29.045853] ? __pfx___split_vma+0x10/0x10 [ 29.046374] ? find_held_lock+0x2c/0x110 [ 29.046896] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.047463] ? lock_is_held_type+0x9f/0x120 [ 29.048003] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.048644] ? mtree_range_walk+0x632/0x900 [ 29.049200] ? mas_walk+0x5c7/0x7c0 [ 29.049674] do_vmi_munmap+0x1f1/0x2b0 [ 29.050167] mmap_region+0x1f9/0x2660 [ 29.050654] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.051162] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.051883] ? __pfx_lock_acquire+0x10/0x10 [ 29.052442] ? __pfx_mmap_region+0x10/0x10 [ 29.052970] ? security_mmap_addr+0x7d/0xa0 [ 29.053495] ? get_unmapped_area+0x1f5/0x3f0 [ 29.054042] do_mmap+0x854/0xf00 [ 29.054480] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.054971] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.055534] ksys_mmap_pgoff+0x3af/0x500 [ 29.056045] do_syscall_64+0x3f/0x90 [ 29.056558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.057215] RIP: 0033:0x7fb0ed844d82 [ 29.057677] 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 [ 29.059813] RSP: 002b:00007fff584cdc88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.060788] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb0ed844d82 [ 29.061636] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb0ecc7e000 [ 29.062485] RBP: 00007fb0ecc7e000 R08: 0000000000000009 R09: 0000000000001000 [ 29.063340] R10: 0000000000000812 R11: 0000000000000206 R12: 00005577037f7ec0 [ 29.064195] R13: 00007fff584cdca0 R14: 00007fff584cdcd0 R15: 00007fff584ce030 [ 29.065111] [ 29.065401] [ 29.065615] Allocated by task 214: [ 29.066046] kasan_save_stack+0x22/0x50 [ 29.066550] kasan_set_track+0x25/0x30 [ 29.067041] __kasan_slab_alloc+0x59/0x70 [ 29.067563] kmem_cache_alloc+0x16b/0x370 [ 29.068082] vm_area_dup+0x20/0x160 [ 29.068569] __split_vma+0x170/0x950 [ 29.069035] split_vma+0xc6/0x110 [ 29.069472] mprotect_fixup+0x8d2/0xb30 [ 29.069971] do_mprotect_pkey+0x87e/0xd40 [ 29.070504] __x64_sys_mprotect+0x78/0xc0 [ 29.071024] do_syscall_64+0x3f/0x90 [ 29.071494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.072136] [ 29.072400] Freed by task 19: [ 29.072787] kasan_save_stack+0x22/0x50 [ 29.073292] kasan_set_track+0x25/0x30 [ 29.073782] kasan_save_free_info+0x2b/0x50 [ 29.074320] __kasan_slab_free+0x10a/0x190 [ 29.074846] kmem_cache_free+0x10d/0x4d0 [ 29.075346] rcu_core+0x8c8/0x2860 [ 29.075788] __do_softirq+0x1b7/0x7d4 [ 29.076284] [ 29.076503] Last potentially related work creation: [ 29.077092] kasan_save_stack+0x22/0x50 [ 29.077592] __kasan_record_aux_stack+0x8e/0xa0 [ 29.078173] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.078819] remove_vma+0x139/0x170 [ 29.079266] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.079824] do_vmi_munmap+0x1f1/0x2b0 [ 29.080354] __vm_munmap+0x138/0x3a0 [ 29.080824] __x64_sys_munmap+0x59/0x80 [ 29.081314] do_syscall_64+0x3f/0x90 [ 29.081787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.082435] [ 29.082650] The buggy address belongs to the object at ffff88800dca5488 [ 29.082650] which belongs to the cache vm_area_struct of size 168 [ 29.084115] The buggy address is located 88 bytes inside of [ 29.084115] freed 168-byte region [ffff88800dca5488, ffff88800dca5530) [ 29.085560] [ 29.085778] The buggy address belongs to the physical page: [ 29.086437] page:000000006ceee46a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdca5 [ 29.087528] memcg:ffff888019c78801 [ 29.087955] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.088634] page_type: 0xffffffff() [ 29.089087] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.090001] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c78801 [ 29.090900] page dumped because: kasan: bad access detected [ 29.091559] [ 29.091773] Memory state around the buggy address: [ 29.092398] ffff88800dca5380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.093261] ffff88800dca5400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 29.094132] >ffff88800dca5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.094993] ^ [ 29.095752] ffff88800dca5500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 29.096642] ffff88800dca5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.097490] ================================================================== [ 29.098744] Disabling lock debugging due to kernel taint [ 31.467632] BUG: Bad rss-counter state mm:000000000f42159b type:MM_FILEPAGES val:33 [ 31.468619] BUG: Bad rss-counter state mm:000000000f42159b type:MM_ANONPAGES val:22 [ 31.968589] BUG: Bad rss-counter state mm:000000008796144a type:MM_FILEPAGES val:33 [ 31.969519] BUG: Bad rss-counter state mm:000000008796144a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32576' (ECDSA) to the list of known hosts. 2023/06/20 17:53:28 fuzzer started 2023/06/20 17:53:28 dialing manager at localhost:36067 2023/06/20 17:53:28 checking machine... 2023/06/20 17:53:28 checking revisions... [ 32.710505] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:53:28 testing simple program... [ 32.751656] cgroup: Unknown subsys name 'net' [ 32.791961] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:53:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015f11680 RCX=ffffffff816560f9 RDX=1ffffd40000c2de0 RSI=0000000000000000 RDI=0000000000000000 RBP=ffffea0000616f00 RSP=ffff88801473f9c8 R8 =0000000000000000 R9 =fffff940000c2de0 R10=ffffea0000616f07 R11=0000000000000000 R12=0000000000000293 R13=ffff888015f118b0 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff814c03a4 RFL=00000046 [---Z-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8430b98900 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=00007f842fffd6a0 CR3=000000000c512000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=958d23ff20ff953600000000000ae988 XMM05=5fea163fb417759d0000000000132ae0 XMM06=c291bd5c70af25b900000000001318d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801be3f401 RSI=ffff88801be3f438 RDI=ffff88801be3f438 RBP=ffff88801be3f010 RSP=ffff88801be3ef48 R8 =0000000000000001 R9 =ffff88801be3eff8 R10=0000000000038001 R11=0000000000020c51 R12=ffff88801be3f018 R13=ffff88801be3f000 R14=ffff88801be3f438 R15=ffff88801be3efb8 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007f79d1f2f900 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=00007f79d1f0e020 CR3=000000000f542000 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=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