syzkaller login: [ 31.879878] BUG: Bad rss-counter state mm:00000000125f4be7 type:MM_FILEPAGES val:33 [ 31.881861] BUG: Bad rss-counter state mm:00000000125f4be7 type:MM_ANONPAGES val:22 [ 32.036353] ================================================================== [ 32.037276] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.038249] Read of size 8 at addr ffff88800f801880 by task sshd/220 [ 32.039043] [ 32.039260] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.040224] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.041195] Call Trace: [ 32.041520] [ 32.041812] dump_stack_lvl+0x91/0xf0 [ 32.042318] print_report+0xcc/0x620 [ 32.042816] ? __virt_addr_valid+0x102/0x340 [ 32.043363] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.044012] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.044630] kasan_report+0xbe/0xf0 [ 32.045104] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.045714] vma_interval_tree_remove+0xc75/0xec0 [ 32.046317] vma_prepare+0xc54/0x11a0 [ 32.046811] __split_vma+0x5af/0x950 [ 32.047302] ? __pfx___split_vma+0x10/0x10 [ 32.047842] ? find_held_lock+0x2c/0x110 [ 32.048355] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.048918] ? lock_is_held_type+0x9f/0x120 [ 32.049460] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.050064] ? mtree_range_walk+0x632/0x900 [ 32.050616] ? mas_walk+0x5c7/0x7c0 [ 32.051086] do_vmi_munmap+0x1f1/0x2b0 [ 32.051580] mmap_region+0x1f9/0x2660 [ 32.052081] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.052591] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.053299] ? __pfx_lock_acquire+0x10/0x10 [ 32.053825] ? __pfx_mmap_region+0x10/0x10 [ 32.054345] ? security_mmap_addr+0x7d/0xa0 [ 32.054882] ? get_unmapped_area+0x1f5/0x3f0 [ 32.055455] do_mmap+0x854/0xf00 [ 32.055918] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.056421] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.056990] ksys_mmap_pgoff+0x3af/0x500 [ 32.057496] do_syscall_64+0x3f/0x90 [ 32.057987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.058641] RIP: 0033:0x7fd5404e4d82 [ 32.059107] 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 [ 32.061260] RSP: 002b:00007ffc77e50e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.062182] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd5404e4d82 [ 32.063050] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd53f91e000 [ 32.063978] RBP: 00007fd53f91e000 R08: 0000000000000009 R09: 0000000000001000 [ 32.064837] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f2a0d6cf70 [ 32.065679] R13: 00007ffc77e50e50 R14: 00007ffc77e50e80 R15: 00007ffc77e511e0 [ 32.066547] [ 32.066839] [ 32.067058] Allocated by task 213: [ 32.067483] kasan_save_stack+0x22/0x50 [ 32.067984] kasan_set_track+0x25/0x30 [ 32.068475] __kasan_slab_alloc+0x59/0x70 [ 32.068988] kmem_cache_alloc+0x16b/0x370 [ 32.069508] vm_area_dup+0x20/0x160 [ 32.069954] __split_vma+0x170/0x950 [ 32.070427] split_vma+0xc6/0x110 [ 32.070863] mprotect_fixup+0x8d2/0xb30 [ 32.071373] do_mprotect_pkey+0x87e/0xd40 [ 32.071888] __x64_sys_mprotect+0x78/0xc0 [ 32.072413] do_syscall_64+0x3f/0x90 [ 32.072900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.073571] [ 32.073794] Freed by task 213: [ 32.074180] kasan_save_stack+0x22/0x50 [ 32.074683] kasan_set_track+0x25/0x30 [ 32.075166] kasan_save_free_info+0x2b/0x50 [ 32.075705] __kasan_slab_free+0x10a/0x190 [ 32.076230] kmem_cache_free+0x10d/0x4d0 [ 32.076726] rcu_core+0x8c8/0x2860 [ 32.077170] __do_softirq+0x1b7/0x7d4 [ 32.077635] [ 32.077842] Last potentially related work creation: [ 32.078408] kasan_save_stack+0x22/0x50 [ 32.078910] __kasan_record_aux_stack+0x8e/0xa0 [ 32.079479] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.080119] remove_vma+0x139/0x170 [ 32.080572] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.081154] do_vmi_munmap+0x1f1/0x2b0 [ 32.081654] __vm_munmap+0x138/0x3a0 [ 32.082123] __x64_sys_munmap+0x59/0x80 [ 32.082622] do_syscall_64+0x3f/0x90 [ 32.083103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.083784] [ 32.084006] The buggy address belongs to the object at ffff88800f801828 [ 32.084006] which belongs to the cache vm_area_struct of size 168 [ 32.085442] The buggy address is located 88 bytes inside of [ 32.085442] freed 168-byte region [ffff88800f801828, ffff88800f8018d0) [ 32.086859] [ 32.087076] The buggy address belongs to the physical page: [ 32.087745] page:000000000ad001bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf801 [ 32.088841] memcg:ffff88800f2cec01 [ 32.089271] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.089928] page_type: 0xffffffff() [ 32.090384] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.091301] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2cec01 [ 32.092205] page dumped because: kasan: bad access detected [ 32.092873] [ 32.093091] Memory state around the buggy address: [ 32.093665] ffff88800f801780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.094554] ffff88800f801800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.095434] >ffff88800f801880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.096302] ^ [ 32.096714] ffff88800f801900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.097572] ffff88800f801980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.098427] ================================================================== [ 32.099416] Disabling lock debugging due to kernel taint [ 34.145407] BUG: Bad rss-counter state mm:00000000ec72f6bb type:MM_FILEPAGES val:33 [ 34.146527] BUG: Bad rss-counter state mm:00000000ec72f6bb type:MM_ANONPAGES val:22 [ 34.596682] BUG: Bad rss-counter state mm:000000006e0c32ea type:MM_FILEPAGES val:33 [ 34.598114] BUG: Bad rss-counter state mm:000000006e0c32ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30073' (ECDSA) to the list of known hosts. 2023/06/19 17:27:40 fuzzer started 2023/06/19 17:27:40 dialing manager at localhost:44161 2023/06/19 17:27:40 checking machine... 2023/06/19 17:27:40 checking revisions... [ 35.241051] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:27:41 testing simple program... [ 35.292461] cgroup: Unknown subsys name 'net' [ 35.341191] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:27:38 Registers: info registers vcpu 0 RAX=000000000b00fe34 RBX=ffff88806ce35000 RCX=1ffffffff0ba72c0 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007ff4773e6163 RSP=ffff88800c3f7208 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007ff4773e6000 R11=00000000000b6996 R12=ffff88800c3f7320 R13=0000000000000000 R14=ffff88800f450000 R15=00000000000928c0 RIP=ffffffff8135b923 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 00007ff476ef3900 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=00007ff4774aa618 CR3=000000000f724000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000002 RCX=ffffffff860d68f6 RDX=0000000000000000 RSI=1ffff1100d9e135b RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff860d68fa R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130af5 RFL=00000212 [----A--] 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=00007f6a8ee4e020 CR3=000000000ea76000 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=2030343a37323a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a37323a3731203931 XMM08=00007fd1a800ae400000004f00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000