syzkaller login: [ 33.287831] BUG: Bad rss-counter state mm:00000000c2c16113 type:MM_FILEPAGES val:33 [ 33.289059] BUG: Bad rss-counter state mm:00000000c2c16113 type:MM_ANONPAGES val:22 [ 33.454606] ================================================================== [ 33.455838] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.456949] Read of size 8 at addr ffff88800e1bac20 by task sshd/219 [ 33.457866] [ 33.458126] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.459157] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.460324] Call Trace: [ 33.460653] <TASK> [ 33.460941] dump_stack_lvl+0x91/0xf0 [ 33.461437] print_report+0xcc/0x620 [ 33.461925] ? __virt_addr_valid+0x102/0x340 [ 33.462477] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.463103] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.463729] kasan_report+0xbe/0xf0 [ 33.464216] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.464835] vma_interval_tree_remove+0xc75/0xec0 [ 33.465432] vma_prepare+0xc54/0x11a0 [ 33.465910] __split_vma+0x5af/0x950 [ 33.466380] ? __pfx___split_vma+0x10/0x10 [ 33.466903] ? find_held_lock+0x2c/0x110 [ 33.467437] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.467996] ? lock_is_held_type+0x9f/0x120 [ 33.468535] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.469141] ? mtree_range_walk+0x632/0x900 [ 33.469686] ? mas_walk+0x5c7/0x7c0 [ 33.470160] do_vmi_munmap+0x1f1/0x2b0 [ 33.470649] mmap_region+0x1f9/0x2660 [ 33.471135] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.471675] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.472385] ? __pfx_lock_acquire+0x10/0x10 [ 33.472926] ? __pfx_mmap_region+0x10/0x10 [ 33.473454] ? security_mmap_addr+0x7d/0xa0 [ 33.473986] ? get_unmapped_area+0x1f5/0x3f0 [ 33.474540] do_mmap+0x854/0xf00 [ 33.474982] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.475483] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.476047] ksys_mmap_pgoff+0x3af/0x500 [ 33.476555] do_syscall_64+0x3f/0x90 [ 33.477035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.477703] RIP: 0033:0x7fc8873d5d82 [ 33.478163] 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 [ 33.480340] RSP: 002b:00007ffe09dd9288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.481262] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8873d5d82 [ 33.482135] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc88680f000 [ 33.483000] RBP: 00007fc88680f000 R08: 0000000000000009 R09: 0000000000001000 [ 33.483892] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a8a618bec0 [ 33.484752] R13: 00007ffe09dd92a0 R14: 00007ffe09dd92d0 R15: 00007ffe09dd9630 [ 33.485618] </TASK> [ 33.485919] [ 33.486134] Allocated by task 212: [ 33.486567] kasan_save_stack+0x22/0x50 [ 33.487086] kasan_set_track+0x25/0x30 [ 33.487594] __kasan_slab_alloc+0x59/0x70 [ 33.488137] kmem_cache_alloc+0x16b/0x370 [ 33.488670] vm_area_dup+0x20/0x160 [ 33.489139] __split_vma+0x170/0x950 [ 33.489619] split_vma+0xc6/0x110 [ 33.490062] mprotect_fixup+0x8d2/0xb30 [ 33.490576] do_mprotect_pkey+0x87e/0xd40 [ 33.491105] __x64_sys_mprotect+0x78/0xc0 [ 33.491646] do_syscall_64+0x3f/0x90 [ 33.492132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.492785] [ 33.493002] Freed by task 212: [ 33.493391] kasan_save_stack+0x22/0x50 [ 33.493890] kasan_set_track+0x25/0x30 [ 33.494399] kasan_save_free_info+0x2b/0x50 [ 33.494935] __kasan_slab_free+0x10a/0x190 [ 33.495484] kmem_cache_free+0x10d/0x4d0 [ 33.495991] rcu_core+0x8c8/0x2860 [ 33.496490] __do_softirq+0x1b7/0x7d4 [ 33.496982] [ 33.497197] Last potentially related work creation: [ 33.497791] kasan_save_stack+0x22/0x50 [ 33.498305] __kasan_record_aux_stack+0x8e/0xa0 [ 33.498887] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.499544] remove_vma+0x139/0x170 [ 33.500010] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.500574] do_vmi_munmap+0x1f1/0x2b0 [ 33.501064] __vm_munmap+0x138/0x3a0 [ 33.501544] __x64_sys_munmap+0x59/0x80 [ 33.502048] do_syscall_64+0x3f/0x90 [ 33.502528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.503169] [ 33.503399] The buggy address belongs to the object at ffff88800e1babc8 [ 33.503399] which belongs to the cache vm_area_struct of size 168 [ 33.504881] The buggy address is located 88 bytes inside of [ 33.504881] freed 168-byte region [ffff88800e1babc8, ffff88800e1bac70) [ 33.506297] [ 33.506518] The buggy address belongs to the physical page: [ 33.507199] page:0000000023c3549e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1ba [ 33.508316] memcg:ffff88800c8b4701 [ 33.508746] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.509406] page_type: 0xffffffff() [ 33.509857] raw: 0100000000000200 ffff88800879fc80 ffffea00003c1f80 dead000000000008 [ 33.510784] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c8b4701 [ 33.511724] page dumped because: kasan: bad access detected [ 33.512385] [ 33.512611] Memory state around the buggy address: [ 33.513215] ffff88800e1bab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.514085] ffff88800e1bab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.514937] >ffff88800e1bac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.515806] ^ [ 33.516325] ffff88800e1bac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.517173] ffff88800e1bad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.518020] ================================================================== [ 33.519019] Disabling lock debugging due to kernel taint [ 35.561409] BUG: Bad rss-counter state mm:000000009f1108a1 type:MM_FILEPAGES val:33 [ 35.562455] BUG: Bad rss-counter state mm:000000009f1108a1 type:MM_ANONPAGES val:22 [ 36.004506] BUG: Bad rss-counter state mm:0000000056173e3a type:MM_FILEPAGES val:33 [ 36.005645] BUG: Bad rss-counter state mm:0000000056173e3a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32177' (ECDSA) to the list of known hosts. 2023/06/20 07:46:28 fuzzer started 2023/06/20 07:46:29 dialing manager at localhost:44161 2023/06/20 07:46:29 checking machine... 2023/06/20 07:46:29 checking revisions... [ 36.706127] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:46:29 testing simple program... [ 36.757380] cgroup: Unknown subsys name 'net' [ 36.807999] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:46:26 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=00007ff8a17017f0 CR3=000000000dd58000 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=2038323a36343a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a36343a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001feee9a RBX=0000000000000005 RCX=0000000000000001 RDX=00000000000928c0 RSI=000000000000000e RDI=ffff88800ff774d0 RBP=dffffc0000000000 RSP=ffff88800ff77418 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=000000000000000e R13=00000000000928c0 R14=ffff88800ff774a8 R15=0000000000002000 RIP=ffffffff813ad5ca RFL=00000246 [---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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe0cd1dc900 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=00007ffe387ea000 CR3=000000000ec04000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000