syzkaller login: [ 30.870465] BUG: Bad rss-counter state mm:00000000467e0f01 type:MM_FILEPAGES val:33 [ 30.871485] BUG: Bad rss-counter state mm:00000000467e0f01 type:MM_ANONPAGES val:22 [ 31.041729] ================================================================== [ 31.042869] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.044135] Read of size 8 at addr ffff88800988fed8 by task sshd/220 [ 31.044958] [ 31.045199] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.046160] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.047167] Call Trace: [ 31.047500] [ 31.047818] dump_stack_lvl+0x91/0xf0 [ 31.048355] print_report+0xcc/0x620 [ 31.048859] ? __virt_addr_valid+0x102/0x340 [ 31.049461] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.050130] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.050790] kasan_report+0xbe/0xf0 [ 31.051287] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.051941] vma_interval_tree_remove+0xc75/0xec0 [ 31.052575] vma_prepare+0xc54/0x11a0 [ 31.053092] __split_vma+0x5af/0x950 [ 31.053614] ? __pfx___split_vma+0x10/0x10 [ 31.054173] ? find_held_lock+0x2c/0x110 [ 31.054716] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.055312] ? lock_is_held_type+0x9f/0x120 [ 31.055892] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.056532] ? mtree_range_walk+0x632/0x900 [ 31.057109] ? mas_walk+0x5c7/0x7c0 [ 31.057619] do_vmi_munmap+0x1f1/0x2b0 [ 31.058132] mmap_region+0x1f9/0x2660 [ 31.058638] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.059179] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.059925] ? __pfx_lock_acquire+0x10/0x10 [ 31.060487] ? __pfx_mmap_region+0x10/0x10 [ 31.061045] ? security_mmap_addr+0x7d/0xa0 [ 31.061624] ? get_unmapped_area+0x1f5/0x3f0 [ 31.062208] do_mmap+0x854/0xf00 [ 31.062668] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.063196] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.063776] ksys_mmap_pgoff+0x3af/0x500 [ 31.064310] do_syscall_64+0x3f/0x90 [ 31.064806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.065487] RIP: 0033:0x7f19ddebbd82 [ 31.065983] 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 [ 31.068215] RSP: 002b:00007fffbcbca6e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.069183] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f19ddebbd82 [ 31.070079] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f19dd2f5000 [ 31.070957] RBP: 00007f19dd2f5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.071845] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d4fabd980 [ 31.072739] R13: 00007fffbcbca700 R14: 00007fffbcbca730 R15: 00007fffbcbcaa90 [ 31.073657] [ 31.073967] [ 31.074195] Allocated by task 213: [ 31.074654] kasan_save_stack+0x22/0x50 [ 31.075191] kasan_set_track+0x25/0x30 [ 31.075724] __kasan_slab_alloc+0x59/0x70 [ 31.076270] kmem_cache_alloc+0x16b/0x370 [ 31.076810] vm_area_dup+0x20/0x160 [ 31.077281] __split_vma+0x170/0x950 [ 31.077790] split_vma+0xc6/0x110 [ 31.078246] mprotect_fixup+0x8d2/0xb30 [ 31.078774] do_mprotect_pkey+0x87e/0xd40 [ 31.079311] __x64_sys_mprotect+0x78/0xc0 [ 31.079855] do_syscall_64+0x3f/0x90 [ 31.080346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.081010] [ 31.081240] Freed by task 210: [ 31.081665] kasan_save_stack+0x22/0x50 [ 31.082198] kasan_set_track+0x25/0x30 [ 31.082715] kasan_save_free_info+0x2b/0x50 [ 31.083296] __kasan_slab_free+0x10a/0x190 [ 31.083952] kmem_cache_free+0x10d/0x4d0 [ 31.084482] rcu_core+0x8c8/0x2860 [ 31.084947] __do_softirq+0x1b7/0x7d4 [ 31.085448] [ 31.085692] Last potentially related work creation: [ 31.086291] kasan_save_stack+0x22/0x50 [ 31.086821] __kasan_record_aux_stack+0x8e/0xa0 [ 31.087424] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.088106] remove_vma+0x139/0x170 [ 31.088586] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.089172] do_vmi_munmap+0x1f1/0x2b0 [ 31.089690] __vm_munmap+0x138/0x3a0 [ 31.090188] __x64_sys_munmap+0x59/0x80 [ 31.090708] do_syscall_64+0x3f/0x90 [ 31.091216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.091884] [ 31.092109] The buggy address belongs to the object at ffff88800988fe80 [ 31.092109] which belongs to the cache vm_area_struct of size 168 [ 31.093678] The buggy address is located 88 bytes inside of [ 31.093678] freed 168-byte region [ffff88800988fe80, ffff88800988ff28) [ 31.095123] [ 31.095352] The buggy address belongs to the physical page: [ 31.096033] page:000000006401572a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x988f [ 31.097151] memcg:ffff88800f7b6801 [ 31.097617] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.098290] page_type: 0xffffffff() [ 31.098758] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.099724] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f7b6801 [ 31.100692] page dumped because: kasan: bad access detected [ 31.101393] [ 31.101645] Memory state around the buggy address: [ 31.102247] ffff88800988fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.103141] ffff88800988fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.104043] >ffff88800988fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.104924] ^ [ 31.105698] ffff88800988ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.106605] ffff88800988ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.107490] ================================================================== [ 31.108470] Disabling lock debugging due to kernel taint [ 33.924858] BUG: Bad rss-counter state mm:00000000339722a5 type:MM_FILEPAGES val:33 [ 33.926013] BUG: Bad rss-counter state mm:00000000339722a5 type:MM_ANONPAGES val:22 [ 34.314350] BUG: Bad rss-counter state mm:00000000dfeb5b59 type:MM_FILEPAGES val:33 [ 34.315582] BUG: Bad rss-counter state mm:00000000dfeb5b59 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45014' (ECDSA) to the list of known hosts. 2023/06/19 20:21:47 fuzzer started 2023/06/19 20:21:47 dialing manager at localhost:44161 2023/06/19 20:21:47 checking machine... 2023/06/19 20:21:47 checking revisions... [ 34.995453] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:21:47 testing simple program... [ 35.044967] cgroup: Unknown subsys name 'net' [ 35.106903] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:21:45 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800e7c08e8 RCX=0000000000000000 RDX=ffff88800f1bb680 RSI=ffffffff818ea875 RDI=ffff88800e7c07e8 RBP=0000000000000009 RSP=ffff88800fe87d88 R8 =0000000000000004 R9 =0000000000000009 R10=0000000000000040 R11=0000000000000000 R12=ffff88800e1e8280 R13=0000000000004000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0800 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 00007f97013d1900 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=00007f9701988618 CR3=000000001039e000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f50d3e619e0 CR3=00000000097de000 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=274888f13cdddc857a48089204ba4a55 XMM02=000000000011fd28eff9b2d0a8fce9cb XMM03=000000000011fdf82c67c8bc2e329bc3 XMM04=bb7c37b84ac3eb7400000000000ae988 XMM05=f8c11827ef8502e50000000000134e50 XMM06=4fda316b135da52b0000000000133ef0 XMM07=e042d86d42eb936e00000000001246e0 XMM08=8463eb4d55afe9f2000000000011fdf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000