[ 26.521908] BUG: Bad rss-counter state mm:00000000549019ee type:MM_FILEPAGES val:33 [ 26.523483] BUG: Bad rss-counter state mm:00000000549019ee type:MM_ANONPAGES val:22 [ 26.683548] ================================================================== [ 26.684478] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.685445] Read of size 8 at addr ffff888016785968 by task sshd/220 [ 26.686228] [ 26.686524] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.687456] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.688670] Call Trace: [ 26.689025] [ 26.689310] dump_stack_lvl+0x91/0xf0 [ 26.689807] print_report+0xcc/0x620 [ 26.690292] ? __virt_addr_valid+0x102/0x340 [ 26.690849] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.691486] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.692119] kasan_report+0xbe/0xf0 [ 26.692591] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.693221] vma_interval_tree_remove+0xc75/0xec0 [ 26.693825] vma_prepare+0xc54/0x11a0 [ 26.694448] __split_vma+0x5af/0x950 [ 26.695020] ? __pfx___split_vma+0x10/0x10 [ 26.695558] ? find_held_lock+0x2c/0x110 [ 26.696076] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.696641] ? lock_is_held_type+0x9f/0x120 [ 26.697179] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.697778] ? mtree_range_walk+0x632/0x900 [ 26.698324] ? mas_walk+0x5c7/0x7c0 [ 26.698796] do_vmi_munmap+0x1f1/0x2b0 [ 26.699313] mmap_region+0x1f9/0x2660 [ 26.699799] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.700313] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.701033] ? __pfx_lock_acquire+0x10/0x10 [ 26.701618] ? __pfx_mmap_region+0x10/0x10 [ 26.702326] ? security_mmap_addr+0x7d/0xa0 [ 26.702875] ? get_unmapped_area+0x1f5/0x3f0 [ 26.703439] do_mmap+0x854/0xf00 [ 26.703882] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.704378] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.704943] ksys_mmap_pgoff+0x3af/0x500 [ 26.705455] do_syscall_64+0x3f/0x90 [ 26.705939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.706593] RIP: 0033:0x7f0a6fc8ed82 [ 26.707078] 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 [ 26.709444] RSP: 002b:00007ffefdb8e7b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.710360] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0a6fc8ed82 [ 26.711236] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0a6f0c8000 [ 26.712099] RBP: 00007f0a6f0c8000 R08: 0000000000000009 R09: 0000000000001000 [ 26.712973] R10: 0000000000000812 R11: 0000000000000206 R12: 00005642263bfd90 [ 26.713836] R13: 00007ffefdb8e7d0 R14: 00007ffefdb8e800 R15: 00007ffefdb8eb60 [ 26.714730] [ 26.715043] [ 26.715312] Allocated by task 213: [ 26.715887] kasan_save_stack+0x22/0x50 [ 26.716416] kasan_set_track+0x25/0x30 [ 26.716921] __kasan_slab_alloc+0x59/0x70 [ 26.717463] kmem_cache_alloc+0x16b/0x370 [ 26.717980] vm_area_dup+0x20/0x160 [ 26.718442] __split_vma+0x170/0x950 [ 26.718914] split_vma+0xc6/0x110 [ 26.719364] mprotect_fixup+0x8d2/0xb30 [ 26.719870] do_mprotect_pkey+0x87e/0xd40 [ 26.720387] __x64_sys_mprotect+0x78/0xc0 [ 26.720920] do_syscall_64+0x3f/0x90 [ 26.721394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.722212] [ 26.722488] Freed by task 213: [ 26.722881] kasan_save_stack+0x22/0x50 [ 26.723411] kasan_set_track+0x25/0x30 [ 26.723916] kasan_save_free_info+0x2b/0x50 [ 26.724449] __kasan_slab_free+0x10a/0x190 [ 26.724978] kmem_cache_free+0x10d/0x4d0 [ 26.725489] rcu_core+0x8c8/0x2860 [ 26.725938] __do_softirq+0x1b7/0x7d4 [ 26.726417] [ 26.726630] Last potentially related work creation: [ 26.727300] kasan_save_stack+0x22/0x50 [ 26.727812] __kasan_record_aux_stack+0x8e/0xa0 [ 26.728392] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.729240] remove_vma+0x139/0x170 [ 26.729703] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.730264] do_vmi_munmap+0x1f1/0x2b0 [ 26.730757] __vm_munmap+0x138/0x3a0 [ 26.731244] __x64_sys_munmap+0x59/0x80 [ 26.731748] do_syscall_64+0x3f/0x90 [ 26.732232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.732887] [ 26.733102] The buggy address belongs to the object at ffff888016785910 [ 26.733102] which belongs to the cache vm_area_struct of size 168 [ 26.734589] The buggy address is located 88 bytes inside of [ 26.734589] freed 168-byte region [ffff888016785910, ffff8880167859b8) [ 26.736225] [ 26.736444] The buggy address belongs to the physical page: [ 26.737117] page:0000000014d48c02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16785 [ 26.738209] memcg:ffff888016a09f01 [ 26.738630] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.739282] page_type: 0xffffffff() [ 26.739735] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 26.740655] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a09f01 [ 26.741555] page dumped because: kasan: bad access detected [ 26.742223] [ 26.742438] Memory state around the buggy address: [ 26.743051] ffff888016785800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 26.744133] ffff888016785880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 26.744993] >ffff888016785900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.745848] ^ [ 26.746637] ffff888016785980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 26.747527] ffff888016785a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.748390] ================================================================== [ 26.749337] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.955587] BUG: Bad rss-counter state mm:000000006f71e34a type:MM_FILEPAGES val:33 [ 28.956527] BUG: Bad rss-counter state mm:000000006f71e34a type:MM_ANONPAGES val:22 [ 29.418890] BUG: Bad rss-counter state mm:0000000020040c54 type:MM_FILEPAGES val:33 [ 29.419896] BUG: Bad rss-counter state mm:0000000020040c54 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61795' (ECDSA) to the list of known hosts. 2023/06/20 04:02:52 fuzzer started 2023/06/20 04:02:53 dialing manager at localhost:44161 2023/06/20 04:02:53 checking machine... 2023/06/20 04:02:53 checking revisions... [ 30.209212] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:02:53 testing simple program... [ 30.259846] cgroup: Unknown subsys name 'net' [ 30.310858] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:02:50 Registers: info registers vcpu 0 RAX=ffffffff816cb48b RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002038e8d RSI=ffffffff816cb48b RDI=ffff8880101c74d8 RBP=ffff8880101c74a8 RSP=ffff8880101c7408 R8 =0000000000000001 R9 =ffff8880101c7450 R10=0000000000038001 R11=0000000000020cf8 R12=ffff8880101c74d8 R13=0000000000000000 R14=ffff88800f96d1c0 R15=ffff88800e79e980 RIP=ffffffff813ad420 RFL=00000286 [--S--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 00007f0c16125900 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=00007f0c166dc618 CR3=000000000f07e000 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=0000000000000001 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=00007fc5a91aaaa0 CR3=000000000d626000 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=f5d02708fe044ba34947fa6ec2215205 XMM02=2c67c8bc2e329bc3000000000011c760 XMM03=fb795ef6d657705600000000001235e8 XMM04=8f56e1771d8e6dd900000000000ae988 XMM05=e4cb8bb95a7664b60000000000133198 XMM06=688c9f42f82d321a0000000000131938 XMM07=e042d86d42eb936e00000000001238c0 XMM08=f4a3455bf7fbe66d000000000011c7c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000