ci starts bisection 2022-11-06 04:01:04.128261898 +0000 UTC m=+202789.678590736 bisecting fixing commit since 1a61b828566fba088d3baa0dc3e440b51fdf9ce2 building syzkaller on 0042f2b4c00ce1ceeaa44a0147909fe3a6f86c5c ensuring issue is reproducible on original commit 1a61b828566fba088d3baa0dc3e440b51fdf9ce2 testing commit 1a61b828566fba088d3baa0dc3e440b51fdf9ce2 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 8b83e96087103bc6ed67af39c098e75798ba3a4916770032b5600d4cdbe7a88c run #0: basic kernel testing failed: BUG: program execution failed: executor NUM: failed to write control pipe: write |NUM: broken pipe run #1: crashed: WARNING in inc_nlink run #2: crashed: WARNING in inc_nlink run #3: crashed: WARNING in inc_nlink run #4: crashed: WARNING in inc_nlink run #5: crashed: WARNING in inc_nlink run #6: crashed: WARNING in inc_nlink run #7: crashed: WARNING in inc_nlink run #8: crashed: WARNING in inc_nlink run #9: crashed: WARNING in inc_nlink run #10: crashed: WARNING in inc_nlink run #11: crashed: WARNING in inc_nlink run #12: crashed: WARNING in inc_nlink run #13: crashed: WARNING in inc_nlink run #14: crashed: WARNING in inc_nlink run #15: crashed: WARNING in inc_nlink run #16: crashed: WARNING in inc_nlink run #17: crashed: WARNING in inc_nlink run #18: crashed: WARNING in inc_nlink run #19: crashed: WARNING in inc_nlink testing current HEAD 2f5065a0bc9d0afb45f2ae284bd525d55ce82c33 testing commit 2f5065a0bc9d0afb45f2ae284bd525d55ce82c33 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 473082073ddcdac7f74c2efbd831beaa9dfc3efd923e3f766b436f0f4796de09 all runs: crashed: KASAN: slab-out-of-bounds Write in _copy_to_iter revisions tested: 2, total time: 21m11.741098591s (build: 13m41.009539679s, test: 6m55.534284992s) the crash still happens on HEAD commit msg: Merge tag 'acpi-6.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm crash: KASAN: slab-out-of-bounds Write in _copy_to_iter ================================================================== BUG: KASAN: slab-out-of-bounds in _copy_to_iter+0xb56/0xfa0 lib/iov_iter.c:527 Write of size 22 at addr ffff88801eff82c7 by task kworker/1:2/142 CPU: 1 PID: 142 Comm: kworker/1:2 Not tainted 6.1.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: events p9_read_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15e/0x461 mm/kasan/report.c:395 kasan_report+0xbb/0x1f0 mm/kasan/report.c:495 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 memcpy+0x39/0x60 mm/kasan/shadow.c:66 _copy_to_iter+0xb56/0xfa0 lib/iov_iter.c:527 copy_page_to_iter+0xa5/0x8e0 lib/iov_iter.c:725 pipe_read+0x440/0xe20 fs/pipe.c:307 __kernel_read+0x27c/0x6d0 fs/read_write.c:428 p9_fd_read net/9p/trans_fd.c:266 [inline] p9_read_work+0x25b/0x1280 net/9p/trans_fd.c:301 process_one_work+0x8ba/0x14b0 kernel/workqueue.c:2289 worker_thread+0x598/0xec0 kernel/workqueue.c:2436 kthread+0x294/0x330 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Allocated by task 4152: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45 kasan_set_track+0x21/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] ____kasan_kmalloc mm/kasan/common.c:330 [inline] __kasan_kmalloc+0x9f/0xb0 mm/kasan/common.c:380 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:955 [inline] __kmalloc+0x54/0xc0 mm/slab_common.c:968 kmalloc include/linux/slab.h:581 [inline] p9_fcall_init+0x79/0x200 net/9p/client.c:228 p9_tag_alloc+0x1b4/0x710 net/9p/client.c:293 p9_client_prepare_req+0xde/0x480 net/9p/client.c:631 p9_client_rpc+0x168/0x9d0 net/9p/client.c:678 p9_client_walk+0x17f/0x420 net/9p/client.c:1152 v9fs_vfs_lookup.part.0+0x12a/0x440 fs/9p/vfs_inode.c:777 __lookup_hash+0xe1/0x140 fs/namei.c:1601 filename_create+0x18c/0x3c0 fs/namei.c:3807 do_mkdirat+0x8d/0x280 fs/namei.c:4050 __do_sys_mkdir fs/namei.c:4080 [inline] __se_sys_mkdir fs/namei.c:4078 [inline] __x64_sys_mkdir+0xd0/0x120 fs/namei.c:4078 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88801eff82c0 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 7 bytes inside of 32-byte region [ffff88801eff82c0, ffff88801eff82e0) The buggy address belongs to the physical page: page:ffffea00007bfe00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801eff8fc1 pfn:0x1eff8 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0000584708 ffff888010c41250 ffff888010c40100 raw: ffff88801eff8fc1 ffff88801eff8000 000000010000003f 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_THISNODE), pid 1, tgid 1 (swapper/0), ts 5846908935, free_ts 0 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x10b5/0x2d50 mm/page_alloc.c:4288 __alloc_pages+0x1c7/0x5a0 mm/page_alloc.c:5555 __alloc_pages_node include/linux/gfp.h:223 [inline] kmem_getpages mm/slab.c:1363 [inline] cache_grow_begin+0x75/0x360 mm/slab.c:2570 cache_alloc_refill+0x27f/0x380 mm/slab.c:2943 ____cache_alloc mm/slab.c:3019 [inline] ____cache_alloc mm/slab.c:3002 [inline] __do_cache_alloc mm/slab.c:3202 [inline] slab_alloc_node mm/slab.c:3250 [inline] __kmem_cache_alloc_node+0x442/0x500 mm/slab.c:3549 __do_kmalloc_node mm/slab_common.c:954 [inline] __kmalloc_node_track_caller+0x45/0xc0 mm/slab_common.c:975 kstrdup+0x2e/0x60 mm/util.c:61 __kernfs_new_node+0x94/0x7b0 fs/kernfs/dir.c:599 kernfs_new_node fs/kernfs/dir.c:665 [inline] kernfs_create_dir_ns+0x80/0x220 fs/kernfs/dir.c:1011 sysfs_create_dir_ns+0x116/0x260 fs/sysfs/dir.c:59 create_dir lib/kobject.c:63 [inline] kobject_add_internal+0x272/0x7d0 lib/kobject.c:223 kobject_add_varg lib/kobject.c:358 [inline] kobject_add+0x120/0x190 lib/kobject.c:410 blk_mq_register_hctx+0xfe/0x2a0 block/blk-mq-sysfs.c:193 blk_mq_sysfs_register+0x1d6/0x500 block/blk-mq-sysfs.c:254 blk_register_queue+0xcd/0x3c0 block/blk-sysfs.c:821 device_add_disk+0x67a/0xdc0 block/genhd.c:486 page_owner free stack trace missing Memory state around the buggy address: ffff88801eff8180: 00 00 01 fc fc fc fc fc 00 04 fc fc fc fc fc fc ffff88801eff8200: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff88801eff8280: 00 06 fc fc fc fc fc fc 00 00 06 fc fc fc fc fc ^ ffff88801eff8300: 05 fc fc fc fc fc fc fc 05 fc fc fc fc fc fc fc ffff88801eff8380: 05 fc fc fc fc fc fc fc 00 00 00 00 fc fc fc fc ==================================================================