syzkaller login: [ 41.577892] BUG: Bad rss-counter state mm:0000000067b9d797 type:MM_FILEPAGES val:33 [ 41.579162] BUG: Bad rss-counter state mm:0000000067b9d797 type:MM_ANONPAGES val:22 [ 41.617823] ================================================================== [ 41.618763] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.619752] Read of size 8 at addr ffff8880188bc228 by task sshd/218 [ 41.620567] [ 41.620858] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.621779] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.622789] Call Trace: [ 41.623121] [ 41.623413] dump_stack_lvl+0x91/0xf0 [ 41.623946] print_report+0xcc/0x620 [ 41.624459] ? __virt_addr_valid+0x102/0x340 [ 41.625034] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.625665] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.626298] kasan_report+0xbe/0xf0 [ 41.626805] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.627460] vma_interval_tree_remove+0xc75/0xec0 [ 41.628088] vma_prepare+0xc54/0x11a0 [ 41.628580] __split_vma+0x5af/0x950 [ 41.629061] ? __pfx___split_vma+0x10/0x10 [ 41.629609] ? find_held_lock+0x2c/0x110 [ 41.630156] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.630733] ? lock_is_held_type+0x9f/0x120 [ 41.631293] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.631929] ? mtree_range_walk+0x632/0x900 [ 41.632500] ? mas_walk+0x5c7/0x7c0 [ 41.632998] do_vmi_munmap+0x1f1/0x2b0 [ 41.633498] mmap_region+0x1f9/0x2660 [ 41.634011] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.634546] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.635283] ? __pfx_lock_acquire+0x10/0x10 [ 41.635855] ? __pfx_mmap_region+0x10/0x10 [ 41.636413] ? security_mmap_addr+0x7d/0xa0 [ 41.636961] ? get_unmapped_area+0x1f5/0x3f0 [ 41.637536] do_mmap+0x854/0xf00 [ 41.637983] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.638493] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.639068] ksys_mmap_pgoff+0x3af/0x500 [ 41.639596] do_syscall_64+0x3f/0x90 [ 41.640101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.640777] RIP: 0033:0x7f3825266d82 [ 41.641258] 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 [ 41.643493] RSP: 002b:00007ffc54543a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.644444] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3825266d82 [ 41.645337] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38246a0000 [ 41.646209] RBP: 00007f38246a0000 R08: 0000000000000009 R09: 0000000000001000 [ 41.647093] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564762bd5f70 [ 41.647982] R13: 00007ffc54543a40 R14: 00007ffc54543a70 R15: 00007ffc54543dd0 [ 41.648882] [ 41.649176] [ 41.649391] Allocated by task 211: [ 41.649831] kasan_save_stack+0x22/0x50 [ 41.650366] kasan_set_track+0x25/0x30 [ 41.650866] __kasan_slab_alloc+0x59/0x70 [ 41.651422] kmem_cache_alloc+0x16b/0x370 [ 41.652015] vm_area_dup+0x20/0x160 [ 41.652482] __split_vma+0x170/0x950 [ 41.652999] split_vma+0xc6/0x110 [ 41.653459] mprotect_fixup+0x8d2/0xb30 [ 41.653986] do_mprotect_pkey+0x87e/0xd40 [ 41.654514] __x64_sys_mprotect+0x78/0xc0 [ 41.655051] do_syscall_64+0x3f/0x90 [ 41.655530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.656196] [ 41.656422] Freed by task 211: [ 41.656817] kasan_save_stack+0x22/0x50 [ 41.657338] kasan_set_track+0x25/0x30 [ 41.657843] kasan_save_free_info+0x2b/0x50 [ 41.658385] __kasan_slab_free+0x10a/0x190 [ 41.658942] kmem_cache_free+0x10d/0x4d0 [ 41.659463] rcu_core+0x8c8/0x2860 [ 41.659931] __do_softirq+0x1b7/0x7d4 [ 41.660428] [ 41.660654] Last potentially related work creation: [ 41.661263] kasan_save_stack+0x22/0x50 [ 41.661780] __kasan_record_aux_stack+0x8e/0xa0 [ 41.662364] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.663019] remove_vma+0x139/0x170 [ 41.663483] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.664053] do_vmi_munmap+0x1f1/0x2b0 [ 41.664541] __vm_munmap+0x138/0x3a0 [ 41.665017] __x64_sys_munmap+0x59/0x80 [ 41.665523] do_syscall_64+0x3f/0x90 [ 41.666007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.666662] [ 41.666877] The buggy address belongs to the object at ffff8880188bc1d0 [ 41.666877] which belongs to the cache vm_area_struct of size 168 [ 41.668373] The buggy address is located 88 bytes inside of [ 41.668373] freed 168-byte region [ffff8880188bc1d0, ffff8880188bc278) [ 41.669802] [ 41.670020] The buggy address belongs to the physical page: [ 41.670701] page:00000000dc8d1332 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x188bc [ 41.671819] memcg:ffff888009fcbf01 [ 41.672271] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.672932] page_type: 0xffffffff() [ 41.673387] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.674331] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009fcbf01 [ 41.675247] page dumped because: kasan: bad access detected [ 41.675930] [ 41.676152] Memory state around the buggy address: [ 41.676749] ffff8880188bc100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.677622] ffff8880188bc180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 41.678492] >ffff8880188bc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.679355] ^ [ 41.679942] ffff8880188bc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 41.680811] ffff8880188bc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 41.681680] ================================================================== [ 41.682660] Disabling lock debugging due to kernel taint [ 44.397226] BUG: Bad rss-counter state mm:00000000612d7325 type:MM_FILEPAGES val:33 [ 44.398143] BUG: Bad rss-counter state mm:00000000612d7325 type:MM_ANONPAGES val:22 [ 45.043273] BUG: Bad rss-counter state mm:0000000067d33de5 type:MM_FILEPAGES val:33 [ 45.044451] BUG: Bad rss-counter state mm:0000000067d33de5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50456' (ECDSA) to the list of known hosts. 2023/06/20 02:09:39 fuzzer started 2023/06/20 02:09:39 dialing manager at localhost:44161 2023/06/20 02:09:39 checking machine... 2023/06/20 02:09:39 checking revisions... [ 45.703450] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:09:39 testing simple program... [ 45.749597] cgroup: Unknown subsys name 'net' [ 45.802166] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:09:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff86605df9 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff86605df9 RDI=ffffffff856528e0 RBP=ffffffff86605df9 RSP=ffff88806ce09a38 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b5420 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800f63b1b0 RIP=ffffffff814c83da 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 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=00007f8bc9ade230 CR3=000000000e3ea000 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=2038333a39303a3230203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a39303a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00007fbb55803618 RCX=ffffffff8113cfcc RDX=ffff888016b08000 RSI=0000000000000000 RDI=0000000000000006 RBP=00007ffffffff000 RSP=ffff888009b8ff00 R8 =0000000000000006 R9 =00007fbb55803618 R10=00007ffffffff000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=00007fbb55803618 R15=0000000000000000 RIP=ffffffff814c07eb 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbb5524c900 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=00007fbb55803618 CR3=000000000c52c000 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=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