syzkaller login: [ 34.437371] BUG: Bad rss-counter state mm:00000000e109e31f type:MM_FILEPAGES val:33 [ 34.438844] BUG: Bad rss-counter state mm:00000000e109e31f type:MM_ANONPAGES val:22 [ 34.586436] ================================================================== [ 34.587504] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.588452] Read of size 8 at addr ffff88800f073058 by task sshd/220 [ 34.589388] [ 34.589607] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.590473] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.591491] Call Trace: [ 34.591813] [ 34.592112] dump_stack_lvl+0x91/0xf0 [ 34.592601] print_report+0xcc/0x620 [ 34.593083] ? __virt_addr_valid+0x102/0x340 [ 34.593648] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.594320] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.594965] kasan_report+0xbe/0xf0 [ 34.595445] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.596074] vma_interval_tree_remove+0xc75/0xec0 [ 34.596685] vma_prepare+0xc54/0x11a0 [ 34.597143] __split_vma+0x5af/0x950 [ 34.597596] ? __pfx___split_vma+0x10/0x10 [ 34.598101] ? find_held_lock+0x2c/0x110 [ 34.598619] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.599157] ? lock_is_held_type+0x9f/0x120 [ 34.599667] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.600241] ? mtree_range_walk+0x632/0x900 [ 34.600761] ? mas_walk+0x5c7/0x7c0 [ 34.601251] do_vmi_munmap+0x1f1/0x2b0 [ 34.601753] mmap_region+0x1f9/0x2660 [ 34.602246] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.602747] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.603428] ? __pfx_lock_acquire+0x10/0x10 [ 34.603963] ? __pfx_mmap_region+0x10/0x10 [ 34.604499] ? security_mmap_addr+0x7d/0xa0 [ 34.605027] ? get_unmapped_area+0x1f5/0x3f0 [ 34.605578] do_mmap+0x854/0xf00 [ 34.606019] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.606512] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.607084] ksys_mmap_pgoff+0x3af/0x500 [ 34.607599] do_syscall_64+0x3f/0x90 [ 34.608080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.608721] RIP: 0033:0x7fd063825d82 [ 34.609178] 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 [ 34.611358] RSP: 002b:00007ffc76dd0348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.612276] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd063825d82 [ 34.613121] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd062c5f000 [ 34.613969] RBP: 00007fd062c5f000 R08: 0000000000000009 R09: 0000000000001000 [ 34.614835] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561abcfc4ec0 [ 34.615690] R13: 00007ffc76dd0360 R14: 00007ffc76dd0390 R15: 00007ffc76dd06f0 [ 34.616556] [ 34.616846] [ 34.617060] Allocated by task 213: [ 34.617494] kasan_save_stack+0x22/0x50 [ 34.618005] kasan_set_track+0x25/0x30 [ 34.618498] __kasan_slab_alloc+0x59/0x70 [ 34.619035] kmem_cache_alloc+0x16b/0x370 [ 34.619558] vm_area_dup+0x20/0x160 [ 34.620012] __split_vma+0x170/0x950 [ 34.620506] split_vma+0xc6/0x110 [ 34.620937] mprotect_fixup+0x8d2/0xb30 [ 34.621439] do_mprotect_pkey+0x87e/0xd40 [ 34.621971] __x64_sys_mprotect+0x78/0xc0 [ 34.622492] do_syscall_64+0x3f/0x90 [ 34.622986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.623654] [ 34.623874] Freed by task 213: [ 34.624282] kasan_save_stack+0x22/0x50 [ 34.624806] kasan_set_track+0x25/0x30 [ 34.625327] kasan_save_free_info+0x2b/0x50 [ 34.625872] __kasan_slab_free+0x10a/0x190 [ 34.626432] kmem_cache_free+0x10d/0x4d0 [ 34.626982] rcu_core+0x8c8/0x2860 [ 34.627414] __do_softirq+0x1b7/0x7d4 [ 34.627891] [ 34.628104] Last potentially related work creation: [ 34.628694] kasan_save_stack+0x22/0x50 [ 34.629192] __kasan_record_aux_stack+0x8e/0xa0 [ 34.629844] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.630497] remove_vma+0x139/0x170 [ 34.630970] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.631551] do_vmi_munmap+0x1f1/0x2b0 [ 34.632066] __vm_munmap+0x138/0x3a0 [ 34.632545] __x64_sys_munmap+0x59/0x80 [ 34.633045] do_syscall_64+0x3f/0x90 [ 34.633522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.634168] [ 34.634386] The buggy address belongs to the object at ffff88800f073000 [ 34.634386] which belongs to the cache vm_area_struct of size 168 [ 34.635876] The buggy address is located 88 bytes inside of [ 34.635876] freed 168-byte region [ffff88800f073000, ffff88800f0730a8) [ 34.637316] [ 34.637536] The buggy address belongs to the physical page: [ 34.638201] page:00000000ce125272 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf073 [ 34.639310] memcg:ffff88800c441501 [ 34.639737] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.640398] page_type: 0xffffffff() [ 34.640863] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.641785] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c441501 [ 34.642733] page dumped because: kasan: bad access detected [ 34.643410] [ 34.643630] Memory state around the buggy address: [ 34.644218] ffff88800f072f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 34.645091] ffff88800f072f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.645970] >ffff88800f073000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.646783] ^ [ 34.647477] ffff88800f073080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 34.648290] ffff88800f073100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.649176] ================================================================== [ 34.650123] Disabling lock debugging due to kernel taint [ 37.148269] BUG: Bad rss-counter state mm:00000000030e47de type:MM_FILEPAGES val:33 [ 37.150030] BUG: Bad rss-counter state mm:00000000030e47de type:MM_ANONPAGES val:22 [ 37.674823] BUG: Bad rss-counter state mm:0000000023dd83e6 type:MM_FILEPAGES val:33 [ 37.675820] BUG: Bad rss-counter state mm:0000000023dd83e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28349' (ECDSA) to the list of known hosts. 2023/06/19 21:57:17 fuzzer started 2023/06/19 21:57:17 dialing manager at localhost:44161 2023/06/19 21:57:17 checking machine... 2023/06/19 21:57:17 checking revisions... [ 38.327315] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:57:17 testing simple program... [ 38.377458] cgroup: Unknown subsys name 'net' [ 38.422243] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:57:13 Registers: info registers vcpu 0 RAX=ffff8880084400c0 RBX=ffff888011534b18 RCX=ffffffff812e00e5 RDX=1ffffffff0adb046 RSI=ffff88801671f600 RDI=ffff888019477c28 RBP=0000000000001000 RSP=ffff888019477cb8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88801671e600 R13=0000000000000000 R14=ffff88800cb2e178 R15=ffff88800cb2e130 RIP=ffffffff818474b7 RFL=00000087 [--S--PC] 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 00007faf94725900 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=00007faf94cda650 CR3=00000000098fe000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffe69709a38 CR3=000000000ec2c000 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=2037313a37353a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a37353a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000