[ 31.501460] BUG: Bad rss-counter state mm:00000000648669fe type:MM_FILEPAGES val:33 [ 31.502630] BUG: Bad rss-counter state mm:00000000648669fe type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.642011] ================================================================== [ 31.643104] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.644271] Read of size 8 at addr ffff888017ee6ed8 by task sshd/218 [ 31.645249] [ 31.645706] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.646762] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.647982] Call Trace: [ 31.648262] [ 31.648513] dump_stack_lvl+0x91/0xf0 [ 31.648957] print_report+0xcc/0x620 [ 31.649386] ? __virt_addr_valid+0x102/0x340 [ 31.649876] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.650433] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.651014] kasan_report+0xbe/0xf0 [ 31.651439] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.651988] vma_interval_tree_remove+0xc75/0xec0 [ 31.652526] vma_prepare+0xc54/0x11a0 [ 31.652951] __split_vma+0x5af/0x950 [ 31.653369] ? __pfx___split_vma+0x10/0x10 [ 31.653836] ? find_held_lock+0x2c/0x110 [ 31.654300] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.654794] ? lock_is_held_type+0x9f/0x120 [ 31.655272] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.655805] ? mtree_range_walk+0x632/0x900 [ 31.656299] ? mas_walk+0x5c7/0x7c0 [ 31.656738] do_vmi_munmap+0x1f1/0x2b0 [ 31.657171] mmap_region+0x1f9/0x2660 [ 31.657592] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.658039] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.658668] ? __pfx_lock_acquire+0x10/0x10 [ 31.659139] ? __pfx_mmap_region+0x10/0x10 [ 31.659604] ? security_mmap_addr+0x7d/0xa0 [ 31.660071] ? get_unmapped_area+0x1f5/0x3f0 [ 31.660562] do_mmap+0x854/0xf00 [ 31.660951] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.661393] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.661886] ksys_mmap_pgoff+0x3af/0x500 [ 31.662337] do_syscall_64+0x3f/0x90 [ 31.662758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.663335] RIP: 0033:0x7f102e601d82 [ 31.663743] 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 [ 31.665636] RSP: 002b:00007ffeb8e0d108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.666426] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f102e601d82 [ 31.667171] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f102da3b000 [ 31.667913] RBP: 00007f102da3b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.668706] R10: 0000000000000812 R11: 0000000000000206 R12: 000055556fb3bb20 [ 31.669466] R13: 00007ffeb8e0d120 R14: 00007ffeb8e0d150 R15: 00007ffeb8e0d4b0 [ 31.670259] [ 31.670522] [ 31.670718] Allocated by task 211: [ 31.671111] kasan_save_stack+0x22/0x50 [ 31.671557] kasan_set_track+0x25/0x30 [ 31.671991] __kasan_slab_alloc+0x59/0x70 [ 31.672453] kmem_cache_alloc+0x16b/0x370 [ 31.672917] vm_area_dup+0x20/0x160 [ 31.673320] __split_vma+0x170/0x950 [ 31.673733] split_vma+0xc6/0x110 [ 31.674124] mprotect_fixup+0x8d2/0xb30 [ 31.674565] do_mprotect_pkey+0x87e/0xd40 [ 31.675023] __x64_sys_mprotect+0x78/0xc0 [ 31.675492] do_syscall_64+0x3f/0x90 [ 31.675918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.676492] [ 31.676691] Freed by task 211: [ 31.677042] kasan_save_stack+0x22/0x50 [ 31.677485] kasan_set_track+0x25/0x30 [ 31.677918] kasan_save_free_info+0x2b/0x50 [ 31.678391] __kasan_slab_free+0x10a/0x190 [ 31.678874] kmem_cache_free+0x10d/0x4d0 [ 31.679323] rcu_core+0x8c8/0x2860 [ 31.679714] __do_softirq+0x1b7/0x7d4 [ 31.680141] [ 31.680332] Last potentially related work creation: [ 31.680871] kasan_save_stack+0x22/0x50 [ 31.681318] __kasan_record_aux_stack+0x8e/0xa0 [ 31.681829] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.682397] remove_vma+0x139/0x170 [ 31.682797] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.683301] do_vmi_munmap+0x1f1/0x2b0 [ 31.683729] __vm_munmap+0x138/0x3a0 [ 31.684144] __x64_sys_munmap+0x59/0x80 [ 31.684592] do_syscall_64+0x3f/0x90 [ 31.685009] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.685582] [ 31.685775] The buggy address belongs to the object at ffff888017ee6e80 [ 31.685775] which belongs to the cache vm_area_struct of size 168 [ 31.687180] The buggy address is located 88 bytes inside of [ 31.687180] freed 168-byte region [ffff888017ee6e80, ffff888017ee6f28) [ 31.688506] [ 31.688721] The buggy address belongs to the physical page: [ 31.689326] page:00000000094c5e12 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17ee6 [ 31.690333] memcg:ffff88800e67d101 [ 31.690727] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.691319] page_type: 0xffffffff() [ 31.691735] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.692605] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e67d101 [ 31.693450] page dumped because: kasan: bad access detected [ 31.694069] [ 31.694267] Memory state around the buggy address: [ 31.694811] ffff888017ee6d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.695595] ffff888017ee6e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.696349] >ffff888017ee6e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.697143] ^ [ 31.697813] ffff888017ee6f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.698601] ffff888017ee6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.699362] ================================================================== [ 31.700220] Disabling lock debugging due to kernel taint [ 33.649784] BUG: Bad rss-counter state mm:000000007f38bd2e type:MM_FILEPAGES val:33 [ 33.650499] BUG: Bad rss-counter state mm:000000007f38bd2e type:MM_ANONPAGES val:22 [ 34.068771] BUG: Bad rss-counter state mm:00000000e5d93e81 type:MM_FILEPAGES val:33 [ 34.070026] BUG: Bad rss-counter state mm:00000000e5d93e81 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39490' (ECDSA) to the list of known hosts. 2023/06/21 04:56:27 fuzzer started 2023/06/21 04:56:27 dialing manager at localhost:36067 2023/06/21 04:56:27 checking machine... 2023/06/21 04:56:27 checking revisions... [ 34.866443] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:56:27 testing simple program... [ 34.904622] cgroup: Unknown subsys name 'net' [ 34.967928] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:56:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880196f5bd8 RCX=0000000000100cca RDX=ffff888015e18000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888019a87b70 RSP=ffff888019a879e8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=ffff8880196f5e00 R14=0000000000000a01 R15=0000000000000000 RIP=ffffffff81b452ac 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 00007fb8d9b6b700 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=00007f6665f0dec0 CR3=000000000ddf4000 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=2036323a36353a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a36353a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86138e91 RBX=0000000000000001 RCX=ffffffff86138e8c RDX=0000000000000000 RSI=1ffffffff0c271d2 RDI=ffffffff85dfe000 RBP=ffff88800ccaedb0 RSP=ffff88800ccaece8 R8 =ffffffff86138e62 R9 =ffff88800ccaed98 R10=0000000000038001 R11=0000000000020d8f R12=ffff88800ccaedb8 R13=ffff88800ccaeda0 R14=ffff88800ccaed99 R15=ffff88800ccaed58 RIP=ffffffff81130a5b RFL=00000216 [----AP-] 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 00007f465c334900 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=00005561f7a32c28 CR3=0000000009524000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000