syzkaller login: [ 38.830917] BUG: Bad rss-counter state mm:00000000f2977ced type:MM_FILEPAGES val:33 [ 38.832522] BUG: Bad rss-counter state mm:00000000f2977ced type:MM_ANONPAGES val:22 [ 39.008311] ================================================================== [ 39.009210] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.010142] Read of size 8 at addr ffff88800fd0f4e0 by task sshd/220 [ 39.010908] [ 39.011123] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.012077] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.013048] Call Trace: [ 39.013366] [ 39.013678] dump_stack_lvl+0x91/0xf0 [ 39.014196] print_report+0xcc/0x620 [ 39.014677] ? __virt_addr_valid+0x102/0x340 [ 39.015230] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.015854] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.016462] kasan_report+0xbe/0xf0 [ 39.016947] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.017573] vma_interval_tree_remove+0xc75/0xec0 [ 39.018177] vma_prepare+0xc54/0x11a0 [ 39.018646] __split_vma+0x5af/0x950 [ 39.019108] ? __pfx___split_vma+0x10/0x10 [ 39.019636] ? find_held_lock+0x2c/0x110 [ 39.020152] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.020719] ? lock_is_held_type+0x9f/0x120 [ 39.021246] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.021849] ? mtree_range_walk+0x632/0x900 [ 39.022414] ? mas_walk+0x5c7/0x7c0 [ 39.022889] do_vmi_munmap+0x1f1/0x2b0 [ 39.023375] mmap_region+0x1f9/0x2660 [ 39.023848] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.024359] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.025061] ? __pfx_lock_acquire+0x10/0x10 [ 39.025585] ? __pfx_mmap_region+0x10/0x10 [ 39.026128] ? security_mmap_addr+0x7d/0xa0 [ 39.026655] ? get_unmapped_area+0x1f5/0x3f0 [ 39.027208] do_mmap+0x854/0xf00 [ 39.027644] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.028141] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.028691] ksys_mmap_pgoff+0x3af/0x500 [ 39.029197] do_syscall_64+0x3f/0x90 [ 39.029664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.030314] RIP: 0033:0x7ff3acb1bd82 [ 39.030793] 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 [ 39.032923] RSP: 002b:00007ffe074ca1a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.033838] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff3acb1bd82 [ 39.034702] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff3abf55000 [ 39.035580] RBP: 00007ff3abf55000 R08: 0000000000000009 R09: 0000000000001000 [ 39.036467] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fe30175f60 [ 39.037358] R13: 00007ffe074ca1c0 R14: 00007ffe074ca1f0 R15: 00007ffe074ca550 [ 39.038257] [ 39.038566] [ 39.038796] Allocated by task 213: [ 39.039243] kasan_save_stack+0x22/0x50 [ 39.039770] kasan_set_track+0x25/0x30 [ 39.040288] __kasan_slab_alloc+0x59/0x70 [ 39.040841] kmem_cache_alloc+0x16b/0x370 [ 39.041381] vm_area_dup+0x20/0x160 [ 39.041862] __split_vma+0x170/0x950 [ 39.042368] split_vma+0xc6/0x110 [ 39.042828] mprotect_fixup+0x8d2/0xb30 [ 39.043361] do_mprotect_pkey+0x87e/0xd40 [ 39.043916] __x64_sys_mprotect+0x78/0xc0 [ 39.044464] do_syscall_64+0x3f/0x90 [ 39.044957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.045630] [ 39.045857] Freed by task 213: [ 39.046275] kasan_save_stack+0x22/0x50 [ 39.046803] kasan_set_track+0x25/0x30 [ 39.047320] kasan_save_free_info+0x2b/0x50 [ 39.047884] __kasan_slab_free+0x10a/0x190 [ 39.048440] kmem_cache_free+0x10d/0x4d0 [ 39.048972] rcu_core+0x8c8/0x2860 [ 39.049436] __do_softirq+0x1b7/0x7d4 [ 39.049940] [ 39.050184] Last potentially related work creation: [ 39.050800] kasan_save_stack+0x22/0x50 [ 39.051323] __kasan_record_aux_stack+0x8e/0xa0 [ 39.051926] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.052606] remove_vma+0x139/0x170 [ 39.053085] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.053675] do_vmi_munmap+0x1f1/0x2b0 [ 39.054198] __vm_munmap+0x138/0x3a0 [ 39.054688] __x64_sys_munmap+0x59/0x80 [ 39.055203] do_syscall_64+0x3f/0x90 [ 39.055704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.056386] [ 39.056609] The buggy address belongs to the object at ffff88800fd0f488 [ 39.056609] which belongs to the cache vm_area_struct of size 168 [ 39.058177] The buggy address is located 88 bytes inside of [ 39.058177] freed 168-byte region [ffff88800fd0f488, ffff88800fd0f530) [ 39.059654] [ 39.059876] The buggy address belongs to the physical page: [ 39.060582] page:0000000014db33d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd0f [ 39.061724] memcg:ffff88800d752701 [ 39.062186] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.062918] page_type: 0xffffffff() [ 39.063391] raw: 0100000000000200 ffff88800879fc80 ffffea00003b8bc0 dead000000000007 [ 39.064352] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d752701 [ 39.065312] page dumped because: kasan: bad access detected [ 39.066019] [ 39.066240] Memory state around the buggy address: [ 39.066847] ffff88800fd0f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.067746] ffff88800fd0f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.068649] >ffff88800fd0f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.069544] ^ [ 39.070367] ffff88800fd0f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 39.071278] ffff88800fd0f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.072180] ================================================================== [ 39.073519] Disabling lock debugging due to kernel taint [ 41.740491] BUG: Bad rss-counter state mm:000000005db68f5f type:MM_FILEPAGES val:33 [ 41.741486] BUG: Bad rss-counter state mm:000000005db68f5f type:MM_ANONPAGES val:22 [ 42.200862] BUG: Bad rss-counter state mm:000000009496fd92 type:MM_FILEPAGES val:33 [ 42.202086] BUG: Bad rss-counter state mm:000000009496fd92 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57850' (ECDSA) to the list of known hosts. 2023/06/19 16:22:02 fuzzer started 2023/06/19 16:22:03 dialing manager at localhost:44161 2023/06/19 16:22:03 checking machine... 2023/06/19 16:22:03 checking revisions... [ 42.951214] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:22:03 testing simple program... [ 43.004138] cgroup: Unknown subsys name 'net' [ 43.106032] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:22:02 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=00007f8bb2fd2d40 CR3=000000000e6d4000 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=2032303a32323a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a32323a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff888008e57bf8 RSP=ffff888008e57b30 R8 =0000000000000001 R9 =ffffed10011caf72 R10=ffff888008e57b97 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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=00007fff871f7000 CR3=000000000e422000 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