syzkaller login: [ 41.025039] BUG: Bad rss-counter state mm:00000000997aa2f2 type:MM_FILEPAGES val:31 [ 41.026299] BUG: Bad rss-counter state mm:00000000997aa2f2 type:MM_ANONPAGES val:22 [ 41.067492] ================================================================== [ 41.068385] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.069428] Read of size 8 at addr ffff88800fa67c20 by task sshd/221 [ 41.070202] [ 41.070424] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.071292] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.072262] Call Trace: [ 41.072590] [ 41.072909] dump_stack_lvl+0x91/0xf0 [ 41.073399] print_report+0xcc/0x620 [ 41.073881] ? __virt_addr_valid+0x102/0x340 [ 41.074430] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.075051] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.075667] kasan_report+0xbe/0xf0 [ 41.076145] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.076808] vma_interval_tree_remove+0xc75/0xec0 [ 41.077419] vma_prepare+0xc54/0x11a0 [ 41.077911] __split_vma+0x5af/0x950 [ 41.078390] ? __pfx___split_vma+0x10/0x10 [ 41.078926] ? find_held_lock+0x2c/0x110 [ 41.079454] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.080017] ? lock_is_held_type+0x9f/0x120 [ 41.080551] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.081228] ? mtree_range_walk+0x632/0x900 [ 41.081782] ? mas_walk+0x5c7/0x7c0 [ 41.082255] do_vmi_munmap+0x1f1/0x2b0 [ 41.082741] mmap_region+0x1f9/0x2660 [ 41.083227] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.083733] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.084440] ? __pfx_lock_acquire+0x10/0x10 [ 41.085012] ? __pfx_mmap_region+0x10/0x10 [ 41.085544] ? security_mmap_addr+0x7d/0xa0 [ 41.086077] ? get_unmapped_area+0x1f5/0x3f0 [ 41.086637] do_mmap+0x854/0xf00 [ 41.087074] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.087571] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.088144] ksys_mmap_pgoff+0x3af/0x500 [ 41.088649] do_syscall_64+0x3f/0x90 [ 41.089178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.089821] RIP: 0033:0x7fd10b0d3d82 [ 41.090286] 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 [ 41.092416] RSP: 002b:00007ffe2fe68758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.093356] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd10b0d3d82 [ 41.094202] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd10a50d000 [ 41.095046] RBP: 00007fd10a50d000 R08: 0000000000000009 R09: 0000000000001000 [ 41.095887] R10: 0000000000000812 R11: 0000000000000206 R12: 000056138474cec0 [ 41.096756] R13: 00007ffe2fe68770 R14: 00007ffe2fe687a0 R15: 00007ffe2fe68b00 [ 41.097612] [ 41.097906] [ 41.098123] Allocated by task 214: [ 41.098550] kasan_save_stack+0x22/0x50 [ 41.099055] kasan_set_track+0x25/0x30 [ 41.099544] __kasan_slab_alloc+0x59/0x70 [ 41.100066] kmem_cache_alloc+0x16b/0x370 [ 41.100589] vm_area_dup+0x20/0x160 [ 41.101069] __split_vma+0x170/0x950 [ 41.101540] split_vma+0xc6/0x110 [ 41.101982] mprotect_fixup+0x8d2/0xb30 [ 41.102485] do_mprotect_pkey+0x87e/0xd40 [ 41.103012] __x64_sys_mprotect+0x78/0xc0 [ 41.103529] do_syscall_64+0x3f/0x90 [ 41.104002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.104707] [ 41.104943] Freed by task 214: [ 41.105326] kasan_save_stack+0x22/0x50 [ 41.105831] kasan_set_track+0x25/0x30 [ 41.106325] kasan_save_free_info+0x2b/0x50 [ 41.106866] __kasan_slab_free+0x10a/0x190 [ 41.107393] kmem_cache_free+0x10d/0x4d0 [ 41.107894] rcu_core+0x8c8/0x2860 [ 41.108344] __do_softirq+0x1b7/0x7d4 [ 41.108847] [ 41.109062] Last potentially related work creation: [ 41.109637] kasan_save_stack+0x22/0x50 [ 41.110144] __kasan_record_aux_stack+0x8e/0xa0 [ 41.110712] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.111346] remove_vma+0x139/0x170 [ 41.111797] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.112351] do_vmi_munmap+0x1f1/0x2b0 [ 41.112890] __vm_munmap+0x138/0x3a0 [ 41.113360] __x64_sys_munmap+0x59/0x80 [ 41.113862] do_syscall_64+0x3f/0x90 [ 41.114334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.114987] [ 41.115202] Second to last potentially related work creation: [ 41.115881] kasan_save_stack+0x22/0x50 [ 41.116382] __kasan_record_aux_stack+0x8e/0xa0 [ 41.116986] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.117624] remove_vma+0x139/0x170 [ 41.118073] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.118630] do_vmi_munmap+0x1f1/0x2b0 [ 41.119115] mmap_region+0x1f9/0x2660 [ 41.119595] do_mmap+0x854/0xf00 [ 41.120019] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.120504] ksys_mmap_pgoff+0x7d/0x500 [ 41.121037] do_syscall_64+0x3f/0x90 [ 41.121514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.122153] [ 41.122369] The buggy address belongs to the object at ffff88800fa67bc8 [ 41.122369] which belongs to the cache vm_area_struct of size 168 [ 41.123834] The buggy address is located 88 bytes inside of [ 41.123834] freed 168-byte region [ffff88800fa67bc8, ffff88800fa67c70) [ 41.125259] [ 41.125475] The buggy address belongs to the physical page: [ 41.126137] page:00000000f4340bcc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfa67 [ 41.127218] memcg:ffff88800fa65101 [ 41.127645] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.128285] page_type: 0xffffffff() [ 41.128752] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 41.129664] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fa65101 [ 41.130557] page dumped because: kasan: bad access detected [ 41.131209] [ 41.131425] Memory state around the buggy address: [ 41.132000] ffff88800fa67b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.132888] ffff88800fa67b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 41.133743] >ffff88800fa67c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 41.134576] ^ [ 41.135125] ffff88800fa67c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 41.135984] ffff88800fa67d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 41.136857] ================================================================== [ 41.137886] Disabling lock debugging due to kernel taint [ 43.130083] BUG: Bad rss-counter state mm:000000007e4ed8aa type:MM_FILEPAGES val:33 [ 43.131269] BUG: Bad rss-counter state mm:000000007e4ed8aa type:MM_ANONPAGES val:22 [ 43.609945] BUG: Bad rss-counter state mm:0000000080b29389 type:MM_FILEPAGES val:33 [ 43.611135] BUG: Bad rss-counter state mm:0000000080b29389 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14100' (ECDSA) to the list of known hosts. 2023/06/19 19:07:20 fuzzer started 2023/06/19 19:07:20 dialing manager at localhost:44161 2023/06/19 19:07:20 checking machine... 2023/06/19 19:07:20 checking revisions... [ 44.250971] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:07:20 testing simple program... [ 44.303115] cgroup: Unknown subsys name 'net' [ 44.356011] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:07:10 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=0000000000000001 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=00007ffc4dab5b18 CR3=0000000005482000 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=00007f5218915510000055bae6af9790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110033454f7 RBX=ffff888019a2a788 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888019a2a7b8 RBP=ffff888019a75000 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6c88 R12=dffffc0000000000 R13=ffff888019a3ee60 R14=ffffffff813782a8 R15=ffff888019a3ee60 RIP=ffffffff81846362 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 00007f58ab528900 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=00007f58aaa49000 CR3=000000000dcce000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9fc0323298c26b2a00000000000ae988 XMM05=1bf24bb93a79ebfe0000000000135c60 XMM06=c291bd5c70af25b90000000000134a50 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000