nvme 0000:00:02.0: enabling device (0000 -> 0002)
nvme nvme0: Removing after probe failure status: -19
==================================================================
BUG: KASAN: use-after-free in dma_direct_unmap_sg+0xd4/0x51c kernel/dma/direct.c:471
Read of size 8 at addr ffff0000d247c010 by task kworker/u4:6/4963

CPU: 1 PID: 4963 Comm: kworker/u4:6 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026
Workqueue: nvme-reset-wq nvme_reset_work
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 print_address_description+0x88/0x218 mm/kasan/report.c:316
 print_report+0x50/0x68 mm/kasan/report.c:420
 kasan_report+0xa8/0xfc mm/kasan/report.c:524
 __asan_report_load8_noabort+0x2c/0x38 mm/kasan/report_generic.c:351
 dma_direct_unmap_sg+0xd4/0x51c kernel/dma/direct.c:471
 dma_unmap_sg_attrs+0xcc/0xf8 kernel/dma/mapping.c:289
 dma_unmap_sgtable include/linux/dma-mapping.h:374 [inline]
 nvme_unmap_data+0x18c/0x7c0 drivers/nvme/host/pci.c:576
 nvme_pci_unmap_rq drivers/nvme/host/pci.c:1019 [inline]
 nvme_pci_complete_rq+0x218/0x348 drivers/nvme/host/pci.c:1024
 nvme_handle_cqe drivers/nvme/host/pci.c:1088 [inline]
 nvme_poll_cq+0x578/0xf50 drivers/nvme/host/pci.c:1115
 nvme_reap_pending_cqes drivers/nvme/host/pci.c:1562 [inline]
 nvme_dev_disable+0x350/0x5ec drivers/nvme/host/pci.c:2769
 nvme_remove_dead_ctrl drivers/nvme/host/pci.c:2864 [inline]
 nvme_reset_work+0x3808/0x477c drivers/nvme/host/pci.c:3015
 process_one_work+0x7e4/0x13bc kernel/workqueue.c:2292
 worker_thread+0x8cc/0xfe8 kernel/workqueue.c:2439
 kthread+0x254/0x2e0 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850

Allocated by task 1615:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:53
 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:375 [inline]
 __kasan_kmalloc+0xa0/0xb8 mm/kasan/common.c:384
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:936 [inline]
 __kmalloc+0xd8/0x180 mm/slab_common.c:949
 kmalloc include/linux/slab.h:568 [inline]
 mempool_kmalloc+0x28/0x38 mm/mempool.c:550
 mempool_alloc+0x154/0x3e0 mm/mempool.c:412
 nvme_map_data drivers/nvme/host/pci.c:841 [inline]
 nvme_prep_rq+0x7d4/0x22fc drivers/nvme/host/pci.c:900
 nvme_prep_rq_batch drivers/nvme/host/pci.c:979 [inline]
 nvme_queue_rqs+0x2b4/0x510 drivers/nvme/host/pci.c:995
 __blk_mq_flush_plug_list block/blk-mq.c:2780 [inline]
 blk_mq_flush_plug_list+0x3e4/0xa9c block/blk-mq.c:2845
 blk_add_rq_to_plug+0x160/0x3b4 block/blk-mq.c:1297
 blk_mq_submit_bio+0xba8/0x1ad8 block/blk-mq.c:3051
 __submit_bio+0x1d8/0x260 block/blk-core.c:591
 __submit_bio_noacct_mq block/blk-core.c:668 [inline]
 submit_bio_noacct_nocheck+0x65c/0xa1c block/blk-core.c:697
 submit_bio_noacct+0xc5c/0x1660 block/blk-core.c:808
 submit_bio+0x29c/0x3d0 block/blk-core.c:853
 ext4_io_submit+0xe0/0x144 fs/ext4/page-io.c:378
 ext4_writepages+0x1cfc/0x28fc fs/ext4/inode.c:2877
 do_writepages+0x2c4/0x50c mm/page-writeback.c:2491
 __writeback_single_inode+0x164/0x157c fs/fs-writeback.c:1688
 writeback_sb_inodes+0x870/0x1470 fs/fs-writeback.c:1979
 __writeback_inodes_wb+0x104/0x370 fs/fs-writeback.c:2050
 wb_writeback+0x420/0xfdc fs/fs-writeback.c:2155
 wb_check_old_data_flush fs/fs-writeback.c:2255 [inline]
 wb_do_writeback fs/fs-writeback.c:2308 [inline]
 wb_workfn+0xab4/0xe18 fs/fs-writeback.c:2336
 process_one_work+0x7e4/0x13bc kernel/workqueue.c:2292
 worker_thread+0x8cc/0xfe8 kernel/workqueue.c:2439
 kthread+0x254/0x2e0 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850

Freed by task 4963:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:53
 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:516
 ____kasan_slab_free+0x148/0x1b0 mm/kasan/common.c:237
 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:245
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1729 [inline]
 slab_free_freelist_hook+0x16c/0x1e8 mm/slub.c:1755
 slab_free mm/slub.c:3687 [inline]
 __kmem_cache_free+0xbc/0x21c mm/slub.c:3700
 kfree+0xd0/0x1a8 mm/slab_common.c:988
 mempool_kfree+0x20/0x30 mm/mempool.c:556
 mempool_free+0xc0/0x2e4 mm/mempool.c:521
 nvme_unmap_data+0x684/0x7c0 drivers/nvme/host/pci.c:585
 nvme_pci_unmap_rq drivers/nvme/host/pci.c:1019 [inline]
 nvme_pci_complete_rq+0x218/0x348 drivers/nvme/host/pci.c:1024
 blk_mq_complete_request+0x94/0xa8 block/blk-mq.c:1237
 nvme_cancel_request+0xa0/0x1bc drivers/nvme/host/core.c:466
 bt_tags_iter+0x28c/0x3b8 block/blk-mq-tag.c:365
 __sbitmap_for_each_set include/linux/sbitmap.h:286 [inline]
 sbitmap_for_each_set+0x2b8/0x558 include/linux/sbitmap.h:307
 bt_tags_for_each block/blk-mq-tag.c:394 [inline]
 __blk_mq_all_tag_iter block/blk-mq-tag.c:405 [inline]
 blk_mq_tagset_busy_iter+0x224/0x300 block/blk-mq-tag.c:449
 nvme_cancel_tagset+0x60/0x98 drivers/nvme/host/core.c:474
 nvme_dev_disable+0x39c/0x5ec drivers/nvme/host/pci.c:2771
 nvme_reset_work+0x128/0x477c drivers/nvme/host/pci.c:2889
 process_one_work+0x7e4/0x13bc kernel/workqueue.c:2292
 worker_thread+0x8cc/0xfe8 kernel/workqueue.c:2439
 kthread+0x254/0x2e0 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850

The buggy address belongs to the object at ffff0000d247c000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 16 bytes inside of
 4096-byte region [ffff0000d247c000, ffff0000d247d000)

The buggy address belongs to the physical page:
page:0000000007fbabc7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x112478
head:0000000007fbabc7 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 dead000000000100 dead000000000122 ffff0000c0002a80
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000d247bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000d247bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000d247c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff0000d247c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff0000d247c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================