syzkaller login: [ 35.553684] BUG: Bad rss-counter state mm:00000000fcc3ef64 type:MM_FILEPAGES val:33 [ 35.555383] BUG: Bad rss-counter state mm:00000000fcc3ef64 type:MM_ANONPAGES val:22 [ 35.717513] ================================================================== [ 35.718666] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.719828] Read of size 8 at addr ffff888009bdc3f8 by task sshd/220 [ 35.720650] [ 35.720867] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.721727] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.722689] Call Trace: [ 35.723023] [ 35.723314] dump_stack_lvl+0x91/0xf0 [ 35.723811] print_report+0xcc/0x620 [ 35.724300] ? __virt_addr_valid+0x102/0x340 [ 35.724858] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.725473] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.726084] kasan_report+0xbe/0xf0 [ 35.726562] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.727195] vma_interval_tree_remove+0xc75/0xec0 [ 35.727808] vma_prepare+0xc54/0x11a0 [ 35.728283] __split_vma+0x5af/0x950 [ 35.728754] ? __pfx___split_vma+0x10/0x10 [ 35.729283] ? find_held_lock+0x2c/0x110 [ 35.729804] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.730367] ? lock_is_held_type+0x9f/0x120 [ 35.730918] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.731561] ? mtree_range_walk+0x632/0x900 [ 35.732120] ? mas_walk+0x5c7/0x7c0 [ 35.732602] do_vmi_munmap+0x1f1/0x2b0 [ 35.733099] mmap_region+0x1f9/0x2660 [ 35.733579] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.734095] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.734804] ? __pfx_lock_acquire+0x10/0x10 [ 35.735341] ? __pfx_mmap_region+0x10/0x10 [ 35.735872] ? security_mmap_addr+0x7d/0xa0 [ 35.736400] ? get_unmapped_area+0x1f5/0x3f0 [ 35.736948] do_mmap+0x854/0xf00 [ 35.737393] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.737883] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.738444] ksys_mmap_pgoff+0x3af/0x500 [ 35.738951] do_syscall_64+0x3f/0x90 [ 35.739463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.740110] RIP: 0033:0x7f3f0c7aed82 [ 35.740569] 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 [ 35.742706] RSP: 002b:00007ffc6052ae28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.743617] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f0c7aed82 [ 35.744476] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f0bbe8000 [ 35.745334] RBP: 00007f3f0bbe8000 R08: 0000000000000009 R09: 0000000000001000 [ 35.746189] R10: 0000000000000812 R11: 0000000000000206 R12: 00005570c2005ec0 [ 35.747044] R13: 00007ffc6052ae40 R14: 00007ffc6052ae70 R15: 00007ffc6052b1d0 [ 35.747904] [ 35.748197] [ 35.748410] Allocated by task 212: [ 35.748842] kasan_save_stack+0x22/0x50 [ 35.749352] kasan_set_track+0x25/0x30 [ 35.749856] __kasan_slab_alloc+0x59/0x70 [ 35.750385] kmem_cache_alloc+0x16b/0x370 [ 35.750909] vm_area_dup+0x20/0x160 [ 35.751377] __split_vma+0x170/0x950 [ 35.751847] split_vma+0xc6/0x110 [ 35.752291] mprotect_fixup+0x8d2/0xb30 [ 35.752789] do_mprotect_pkey+0x87e/0xd40 [ 35.753310] __x64_sys_mprotect+0x78/0xc0 [ 35.753843] do_syscall_64+0x3f/0x90 [ 35.754316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.754979] [ 35.755195] Freed by task 212: [ 35.755584] kasan_save_stack+0x22/0x50 [ 35.756091] kasan_set_track+0x25/0x30 [ 35.756586] kasan_save_free_info+0x2b/0x50 [ 35.757122] __kasan_slab_free+0x10a/0x190 [ 35.757657] kmem_cache_free+0x10d/0x4d0 [ 35.758164] rcu_core+0x8c8/0x2860 [ 35.758612] __do_softirq+0x1b7/0x7d4 [ 35.759097] [ 35.759311] Last potentially related work creation: [ 35.759907] kasan_save_stack+0x22/0x50 [ 35.760407] __kasan_record_aux_stack+0x8e/0xa0 [ 35.760982] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.761637] remove_vma+0x139/0x170 [ 35.762089] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.762647] do_vmi_munmap+0x1f1/0x2b0 [ 35.763147] __vm_munmap+0x138/0x3a0 [ 35.763614] __x64_sys_munmap+0x59/0x80 [ 35.764115] do_syscall_64+0x3f/0x90 [ 35.764588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.765232] [ 35.765445] The buggy address belongs to the object at ffff888009bdc3a0 [ 35.765445] which belongs to the cache vm_area_struct of size 168 [ 35.766909] The buggy address is located 88 bytes inside of [ 35.766909] freed 168-byte region [ffff888009bdc3a0, ffff888009bdc448) [ 35.768334] [ 35.768548] The buggy address belongs to the physical page: [ 35.769204] page:00000000f15139b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9bdc [ 35.770285] memcg:ffff88800e379701 [ 35.770711] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.771372] page_type: 0xffffffff() [ 35.771820] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 35.772737] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e379701 [ 35.773641] page dumped because: kasan: bad access detected [ 35.774299] [ 35.774513] Memory state around the buggy address: [ 35.775114] ffff888009bdc280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.775964] ffff888009bdc300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.776818] >ffff888009bdc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.777678] ^ [ 35.778519] ffff888009bdc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.779401] ffff888009bdc480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.780245] ================================================================== [ 35.781273] Disabling lock debugging due to kernel taint [ 38.450956] BUG: Bad rss-counter state mm:000000005d2f572f type:MM_FILEPAGES val:33 [ 38.452505] BUG: Bad rss-counter state mm:000000005d2f572f type:MM_ANONPAGES val:22 [ 38.932258] BUG: Bad rss-counter state mm:000000008a75c0e2 type:MM_FILEPAGES val:33 [ 38.933535] BUG: Bad rss-counter state mm:000000008a75c0e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18160' (ECDSA) to the list of known hosts. 2023/06/21 05:10:42 fuzzer started 2023/06/21 05:10:42 dialing manager at localhost:36067 2023/06/21 05:10:42 checking machine... 2023/06/21 05:10:42 checking revisions... [ 39.658230] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:10:42 testing simple program... [ 39.716735] cgroup: Unknown subsys name 'net' [ 39.769363] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:10:42 Registers: info registers vcpu 0 RAX=0000000000000010 RBX=0000000000000001 RCX=ffffffff836827d8 RDX=0000000000000005 RSI=ffffffff863b941c RDI=ffffffff85fa8e7c RBP=ffffffff85fa8e7c RSP=ffff88801beff468 R8 =ffffffff863b941c R9 =ffff88801beff560 R10=0000000000038001 R11=000000000008b92e R12=ffffffff85fa8e8c R13=ffffffff85fa8e7c R14=ffffffff85fa8e7c R15=dffffc0000000000 RIP=ffffffff8112fc5d RFL=00000202 [-------] 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 00007f3752e58900 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=00007f375340f618 CR3=000000000fa5a000 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=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff81289068 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000ba8f R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800b37cec0 RIP=ffffffff813ad47e RFL=00000282 [--S----] 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=00007fdb091d7010 CR3=000000000ea20000 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=e1fcc353120c9ebfac4b5e63f7e79da4 XMM02=2c67c8bc2e329bc3000000000011b7d0 XMM03=fb795ef6d657705600000000001219f8 XMM04=eaed78cd86d5429d00000000000ae988 XMM05=eaa9a853fddd6e8a0000000000132778 XMM06=4fda316b135da52b00000000001314a8 XMM07=e042d86d42eb936e0000000000121c78 XMM08=4cc2d5e1a037721e000000000011b830 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000